Chem. J. Chinese Universities

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Cover and Content of Chemical Journal of Chinese Universities Vol.47 No.1(2026)

Chem. J. Chinese Universities 2026, 47 (1): 1-6.

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Preparation and Applications of CO₂-Derived Red-emissive Carbon Dots with a High Quantum Yield

GUO Dan, HUANG Genghong, BAI Huijie, WANG Yaling, CAO Guangqun, LIU Bin, HU Shengliang

Chem. J. Chinese Universities 2025, 46 (6): 20250091-. DOI: 10.7503/cjcu20250091

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A five-membered cyclic carbonate compound， tris（hydroxymethyl）propyl pentacyclic carbonate（TPTE）， was synthesized using CO₂ and trihydroxymethylpropane triglycidyl ether as starting materials via cycloaddition reaction. Subsequently， red-emissive carbon dots（R-CDs） with a quantum yield of 38% were prepared through a solvothermal method using TPTE and o-phenylenediamine as precursors and ethanol as the solvent. Structural characterization revealed that the obtained R-CDs exhibited an average particle size of 9.41 nm， with a highly graphitized carbon core and surface-rich hydroxyl and amino functional groups. Optical performance testing demonstrated that the R-CDs in ethanol solution displayed distinct excitation-independent characteristics， showing three-fingered emission peaks at 599， 648 and 702 nm under excitation at 535 nm， accompanied by a fluorescence lifetime of 6.46 ns. Theoretical calculations and spectroscopic analyses confirmed that these luminescent properties originated from extended π-conjugated systems within the carbon core inducing（π， π^*） transitions. Notably， when combined with polyvinylpyrrolidone（PVP）， the ultraviolet-visible absorption and fluorescence emission characteristics of R-CDs remained essentially unchanged， indicating negligible electronic interactions between PVP matrices and R-CDs. Leveraging their excellent optical properties， R-CDs/PVP composites were employed as phosphors integrated with a 360 nm ultraviolet LED chip to fabricate red-emitting devices. The prepared LED exhibited CIE chromaticity coordinates of （0.42， 0.21）， precisely falling within the red light region with high monochromaticity. Significantly， this research achieved efficient indirect fixation of CO₂ by converting it into functionalized cyclic carbonate precursors， providing an innovative approach for greenhouse gas valorization. This integrated strategy combining high-quantum-yield fluorescent material development with carbon reduction technology holds substantial application potential in optoelectronic devices and green chemistry.

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Preparation of Carbon Dot-based Multicolor Room-temperature Phosphorescent Materials via Precursor Structure Regulation Strategies

LIU Jinkun, RAN Zhun, LIU Qingqing, LIU Yingliang, ZHUANG Jianle, HU Chaofan

Chem. J. Chinese Universities 2025, 46 (6): 20240412-. DOI: 10.7503/cjcu20240412

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In this paper， a simple precursor molecular structure regulation strategy was presented， and carbon dot-based composites with phosphorescent emission colors covering the visible light spectrum were prepared through an in situ calcination method using Al₂O₃ as a matrix and various small molecules as organic precursors. Transmission electron microscopy， Fourier-transform infrared spectroscopy， X-ray diffraction， and X-ray photoelectron spectroscopy confirmed the successful growth of carbon dots within the Al₂O₃ matrix. Fluorescence spectroscopy tests indicated that the phosphorescent colors of the four CDs@Al₂O₃ composites were blue（454 nm）， green（520 nm）， orange（572 nm）， and red（632 nm）， with average lifetimes of 130.6， 293.6， 498.6， and 539.0 ms， respectively. The observed redshift in phosphorescent emission wavelength attributed to the decrease in the energy gap between the excited state and ground state of the carbon dots with increasing π-conjugation and number of oxygen-containing functional groups in the precursor， which achieved the modulation of multicolor phosphorescent emissions. Based on the multicolor room-temperature phosphorescent characteristics of this material， its applications in anti-counterfeiting and information encryption was preliminarily explored.

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Preparation of Broad-spectrum UV Protection Carbon Dots for the Application of Sunscreen Absorber

CHEN Qidan, CHEN Guanji, YOU Shanmei, ZANG Xinyao, YANG Bai

Chem. J. Chinese Universities 2025, 46 (6): 20240313-. DOI: 10.7503/cjcu20240313

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Sunscreen absorber， the basic ultraviolet（UV） protection additives that absorb UV rays， is the active ingredient in sunscreen products. However， traditional sunscreen absorbers are known as organic and inorganic chemicals which have problems such as unknown toxicity for human health and environment， instability， poor water solubility， and a narrow range of UV absorption， the study of eco-friendly broad-spectrum sunscreen absorber materials is important for the application of sunscreen products. In recent years， carbon dots have shown good properties in the application of UV absorbers due to their chemistry stability， eco-friendly， excellent UV absorption efficiency. In this study， two kinds of carbon dots（named O-CDs and A-CDs， respectively） were prepared from dopamine hydrochloride and o-phenylenediamine， citric acid and urea independently by simple one-pot hydrothermal synthesis method， purified by column chromatography and then characterized by X-ray photoelectron spectroscopy（XPS）， transmission electron microscopy（TEM）， X-ray diffraction（XRD）， Fourier transform infrared spectroscopy（FTIR）， Ultraviolet-visible spectroscopy（UV-Vis）， and fluorescence spectroscopy. The results showed that a broad-spectrum UV protection material named as B-CDs was developed by mixing O-CDs and A-CDs with the optimized mass ratio of 1∶1.5. In addition， the B-CDs were added as a broad-spectrum UV absorber to polyvinyl alcohol（PVA） solution to prepare the UV protection calligraphy ink， and the sunscreen effect stability of the ink was tested in a certain period（120 h）. The results indicated that the broad-spectrum carbon dots UV absorber is high- efficiency and stable， and carbon dots have the potential to be used as ideal photostable broad-spectrum UV absorber additives for sunscreen products.

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Electrochemical Removal of PFAS by Boron-doped Diamond Electrode

ZHANG Senchong, LYU Jitao, WANG Sen, LYU Jilei, WANG Shaolong, WANG Yawei

Chem. J. Chinese Universities 2025, 46 (8): 20250096-. DOI: 10.7503/cjcu20250096

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In this study， six boron-doped diamond（Nb/BDD） electrodes with different boron doping levels were prepared using niobium flakes as the substrate by microwave plasma chemical vapor deposition， and the effects of different boron doping levels on the electrochemical performance of Nb/BDD electrodes and their oxidation of perfluorooctanoic acid（PFOA） were investigated and applied to the electrochemical removal of different perfluorosulfonic acids（PFASs）. The results showed that with the increase of boron doping level， the grain size of the Nb/BDD film gradually decreased and the electron transfer rate on the electrode surface gradually increased， but the decrease of film quality leads to the increase of its exfoliation rate. Na₂SO₄ was used as the electrolyte， and the Nb/BDD electrode as the anode was able to oxidize PFOA within 120 min at a current density of 30 mA/cm². PFOA degradation rate to 78.3% and mineralization rate to 78.1% within 240 min. Among the six Nb/BDD electrodes prepared with different boron doping levels， the medium and low-doped Nb/BDD electrodes have higher degradation and mineralization ability for PFOA， indicating that the efficient electrochemical removal of PFAS can be achieved by regulating the boron doping level of BDD. The analysis of the degradation products indicated that the electrochemical degradation of PFOA follows the law of carbon chain step-by-step removal， in which the direct electron transfer between the anode and the pollutant is the key initiation step of degradation. The electrochemical degradation of PFSA and perfluorocarboxylic acid（PFCA） with different chain lengths reveals that the length of the carbon chain is positively proportional with the degradation rate and mineralization rate of PFAS， and thus the short-chain products generated by the degradation are the main reason for limiting the complete mineralization of PFAS. In the future， more attention needs to be paid to the efficient removal of short-chain and ultrashort-chain PFAS in order to meet the demand for the complete detoxification of PFAS through electrochemical technologies.

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Photolysis of Photoremovable Protecting Group Molecule Mediated by the Host-guest Interaction of Cucurbit［n］uril

LIU Chong, LIU Simin

Chem. J. Chinese Universities 2025, 46 (5): 20250033-. DOI: 10.7503/cjcu20250033

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An aromatic acridine derivative with photoremovable protecting group（PPG） properties was designed and synthesized. The host-guest recognition process between this guest molecule and cucurbit［n］uril（CB［n］， n=7， 8， 10） was investigated， along with the effects of host-guest interaction on the photolysis of the guest in aqueous-phase using nuclear magnetic resonance（NMR）， ultraviolet visible（UV-Vis） and fluorescence spectroscopies. The results showed that CB［7］ formed a 1׃1 host-guest inclusion complex， while CB［8］ formed both 1׃1 and 1׃2 complexes with the guest. Similarly， CB［10］ exhibited a 1׃2 binding mode. Furthermore， CB［7］ was found to inhibit the photolysis， whereas CB［8］ significantly enhanced the photolysis rate of the guest. This study highlights how subtle variations in CB［n］ cavity size influence the photolysis reaction， offering insights into the design of CB［n］-based nanoreactor- mediated supramolecular systems for aqueous-phase photolysis of PPG molecules.

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Research Progress of Carbon-based Moisture Power Generation Devices

LI Qijun, ZHAO Hongjia, LIU Longtao, LU Chunyi, TAN Jing

Chem. J. Chinese Universities 2025, 46 (6): 20240413-. DOI: 10.7503/cjcu20240413

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Moisture-enabled electricity generation（MEG）， an emerging energy-harvesting technology， has attracted significant attention in recent years. Owing to the ubiquitous presence of water vapor and the pollution-free nature of the power generation process， MEG technology demonstrates strong adaptability， that is， it is not limited by natural conditions such as season， region and environment. This paper presents a comprehensive review of the evolution of MEG technology. It discusses the interaction mechanism between moisture and power generation materials， primarily focusing on ion gradient diffusion and streaming potential. It also provides a detailed analysis of the types， characteristics， advantages and disadvantages of new carbon-based hygroscopic layer materials. Furthermore， it describes the development of moisture power generation technology in the latest application fields.

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D-A Type Covalent Organic Framework Nanorods for Visible Light Catalyzed Benzylamine Coupling Reaction

ZHANG Xiaohui, ZHAO Dongdong, ZHANG Junjie, ZHUANG Jinliang

Chem. J. Chinese Universities 2025, 46 (7): 20250020-. DOI: 10.7503/cjcu20250020

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Covalent organic frameworks（COFs） are a new type of covalently bonded crystalline materials with predictable structures and permanent porosity. COFs have found extensive applications in heterogeneous catalysts. In this study， organic monomers containing photoactive pyrene groups（TFPPy） and benzothiadiazole（BTz） were used as building units for the construction of COFs. The donor-acceptor（D-A） type TFPPy-BTz-COF nanorods photocatalysts were successfully synthesized via a solvent-thermal method. The morphology， structure， and composition of TFPPy-BTz-COF were characterized by scanning electron microscopy（SEM）， high-resolution transmission electron microscopy（HRTEM）， X-ray diffraction（XRD）， UV-Vis diffuse reflectance spectroscopy（UV-Vis DRS）， Fourier-transform infrared（FTIR） spectroscopy， and N₂ adsorption-desorption measurements. The as-synthesized TFPPy-BTz-COF nanorods exhibit a rod-like morphology with a high degree of crystallinity， a specific surface area（BET） of 118.86 m²/g， and a band gap（E_g） of 2.30 eV. Benefiting from their efficient photogenerated photo-electron pair ability， the TFPPy-BTz-COF nanorods enable the coupling reaction of various amines with high efficiency and selectivity under conditions of room temperature， oxygen atmosphere， and visible light irradiation. Electron paramagnetic resonance spectroscopy（EPR） and active species trapping experiments suggested that the singlet oxygen （¹O₂） and superoxide radical（ $O 2 ∙ -$ ） are key intermediates， and a catalytic mechanism for the visible light mediated photocatalytic oxidation coupling of benzylamines catalyzed by TFPPy-BTz-COF was proposed.

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Correlation Between the Photoluminescene Mechanism and Structure of Carbon Dots

LIU Yize, LI Pengfei, SUN Zaicheng

Chem. J. Chinese Universities 2025, 46 (6): 20250103-. DOI: 10.7503/cjcu20250103

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As a novel class of zero-dimensional carbon-based nanomaterials， carbon dots（CDs） have demonstrated broad application prospects in bioimaging， optoelectronic devices， and environmental sensing due to their tunable luminescence， low toxicity， and versatile functionality. However， the luminescence mechanisms of CDs remain a central research focus owing to diverse synthesis methods， varied raw material sources， and complex composition-structure characteristics. The elusive nature luminescence mechanism has hindered the rational design and application of CDs with superior fluorescence performance. This article systematically investigates the correlation between the structural characteristics and luminescence mechanisms of CDs， with focused analysis on the roles of five core mechanisms： quantum confinement effect， effective conjugate length， surface-edge states， molecular states， and cross-link enhanced emission effects. The comprehensive analysis aims to provide theoretical guidance for the controlled synthesis and functional applications of CDs with superior fluorescence performance.

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Applications and Prospects of Carbon Dots in Interface Engineering of Organic Solar Cells

WANG Xin, WANG Yu, MU Fumao, YAN Lingpeng, WANG Zhenguo, YANG Yongzhen

Chem. J. Chinese Universities 2025, 46 (6): 20240416-. DOI: 10.7503/cjcu20240416

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Organic solar cells（OSCs） have gradually become a research focus in the photovoltaic field due to their advantages， such as simple fabrication processes， diverse material sources， flexibility， and roll-to-roll production capability. However， as OSCs move toward further commercialization， they face challenges such as improving power conversion efficiency（PCE）， scaling up production， reducing costs， and enhancing stability. In addressing these issues， carbon dots（CDs） have garnered widespread attention due to their low cost， diverse structures， environmental friendliness， wide availability， high conductivity， and good stability. In OSC devices， CDs can be used as charge transport layers and interface modification materials， improving the energy level matching and charge transport performance at the cell interface through interface engineering， thereby enhancing the overall performance of OSCs and providing new insights for the development of photovoltaic cells. In this review， the concept， classification， and unique structural features of CDs are introduced. Then， the excellent tunable optoelectronic properties and functionalization modification methods of CDs are highlighted. Furthermore， the application of CDs in the field of interface engineering of OSCs is comprehensively summarized， and finally the challenges associated with CDs-based interface materials in OSCs， along with prospects for their further development， are addressed.

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Synthesis， Fluorescence Mechanism and Patterning of Green-emissive Carbon Dots

YANG Chunyuan, CHEN Hao, ZHANG Pan, LI Fucheng, YUAN Weixiong, GUO Jiazhuang, WANG Caifeng, CHEN Su

Chem. J. Chinese Universities 2025, 46 (6): 20250093-. DOI: 10.7503/cjcu20250093

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In this study， green-emissive carbon dots（G-CDs1） were prepared using salicylic acid and ethylenediamine as precursors through a hydrothermal method， followed by purification via dialysis and column chromatography. G-CDs1 exhibited an emission wavelength of 518 nm and a photoluminescence quantum yield（PLQY） of 22.3%. Structural characterization revealed that G-CDs1 possess a graphitic carbon core and abundant surface functional groups（—OH， —COOH， —NH₂）. Comparative experiments were designed： first， blue-emissive carbon cores were obtained by hydrothermally treating salicylic acid alone； then， these cores were reacted with ethylenediamine to produce green-emissive carbon dots（G-CDs2）. Comparative analysis showed that G-CDs2 and G-CDs1 shared identical fluorescence properties and structural features， revealing a “carbon core-fluorophore” synergistic emission mechanism， where green-emissive fluorophores were generated through defect passivation or surface reaction with ethylenediamine， jointly contributing to the fluorescence emission together with the carbon core. Consequently， a G-CDs1/polyvinylpyrrolidone（PVP） fluorescent ink composite was developed， enabling printed patterns with bright green fluorescence. This research contributes to the development of controllable synthesis， fluorescence mechanism， and applications of carbon dots.

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Robust， Self-healing Polyurethane Hydrogel Enabled by Dual Crosslinking of Dynamic Disulfide and Hydrogen Bonds

YANG Bing, DING Xia, XU Jun, LI Ye, GU Rui, ZHANG Hui, HOU Zhaosheng

Chem. J. Chinese Universities 2025, 46 (9): 20250098-. DOI: 10.7503/cjcu20250098

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This study developed a new kind of self-healing polyurethane hydrogels（SPUGs） through a synergistic crosslinking strategy combining dynamic covalent disulfide bonds and non-covalent hydrogen bonds. A specifically synthesized quadrifunctional crosslinker， 3，3'-disulfanediylbis（propane-1，2-diol）， was employed to react with poly（ethylene glycol）-based polyurethane prepolymers， followed by solvent-exchange method to produce SPUGs. The physicochemical properties of SPUGs and lyophilized gels（DSPUGs） were characterized comprehensively， and the results revealed that the dual-crosslinked systems exhibited enhanced thermal stability［temperature at 5% mass loss（T_5%）>250 ℃］ and low glass transition temperature（T_g<0 ℃）. With the increase of disulfide bond content， the surface hydrophilicity and equilibrium swelling ratio of SPUGs reduced， while water-retaining capacity increased. Mechanical tests demonstrated that SPUGs exhibited elastic deformation and possessed outstanding tensile properties， compressive toughness and fatigue-resistant capacities. SPUG-II with a moderate crosslinking density achieved a maximum tensile strength of 112.2 kPa， elongation at break of 459.4% and fracture toughness of 267.6 kJ/m³. The double dynamic bonds endowed SPUGs with high self-healing efficiency（≥90% at 50 ℃ for 2 h） and redox-triggered reversible gel-sol transitions. Methyl thiazolyl tetrazolium（MTT） assays confirmed favorable cytocompatibility with cell survival rate exceeding 80% after 72 h incubation. The SPUG hydrogels with superior mechanical properties， reversible gel-sol transitions， high self-healing capability， and good biocompatibility indicated promising prospects in biomedical applications.

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Ordered Lithium Deposition on Lithium Metal Anode Controlled by Boron-doped Carbon Dots from Solid-state Synthesis

NI Jiawen, HUANG Zunhui, SONG Tianbing, MA Qianli, HE Tianle, ZHANG Xirong, XIONG Huanming

Chem. J. Chinese Universities 2025, 46 (6): 20240185-. DOI: 10.7503/cjcu20240185

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Boron-doped carbon dots（B-CDs） synthesized via solid-phase method were employed as electrolyte additives for lithium metal batteries. The carbon dots were prepared through the catalytic pyrolysis of carbon sources in air， highlighting high yield， efficiency， safety， and convenience. Synthesized from 1，3，5-trihydroxy-benzen and boric acid， the B-CDs exhibited excellent dispersibility in carbonate-based electrolytes. The doped boron atoms， serving as electron-deficient centers， could engage fluorinated anion groups through Lewis acid-base interactions， thus inducing uniform lithium-ion deposition on the lithium anode. At an additive concentration of 0.3 mg/mL， a lithium symmetric cell demonstrated stable cycling for 2500 h under a current density of 0.5 mA/cm² and a plating capacity of 0.5 mA·h/cm²， indicating that the carbon dot additive significantly enhanced the reversibility of lithium deposition/dissolution. When these carbon dots were incorporated into electrolytes of a LiFePO₄ full cell， an initial capacity of 144.4 mA·h/g was achieved， with a capacity retention of 95.1% after 100 cycles.

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Enhancing Methanol Oxidation Reaction by NiO Featuring High Concentration of Oxygen Vacancy and Ni³⁺/Ni²⁺ Ratio

LU Jiantian, ZHAO Manzhen, ZHANG Baohua, SONG Shuang, ZHANG Yuwei

Chem. J. Chinese Universities 2025, 46 (7): 20250073-. DOI: 10.7503/cjcu20250073

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To address the critical challenges of insufficient active sites， poor conductivity， and sluggish reaction kinetics in nickel-based electrocatalysts for methanol oxidation reaction（MOR）， this study proposes a lattice doping engineering strategy. By employing a low-cost ammonium molybdate precursor coupled with a calcination process， we successfully constructed Mo-doped NiO catalysts synergistically enhanced by oxygen vacancies and Ni³⁺ active sites. Experimental results demonstrate that as the Mo doping level increases from 0 to 28%（atomic fraction）， the oxygen vacancy concentration on the catalyst surface escalates progressively from 30.18% to 56.59%， while the proportion of Ni³⁺ species rises from 65.55% to 85.91%. At an optimal Mo doping content of 28%， the catalyst achieves a current density of 280.8 mA/cm² at 1.7 V（vs. RHE） in 1.0 mol/L KOH/1.0 mol/L CH₃OH electrolyte， representing a 12.9-fold enhancement compared to undoped NiO（21.7 mA/cm²）. Furthermore， the Tafel slope decreases signifi-cantly from 63 mV/dec to 25 mV/dec. Systematic characterizations via XRD， SEM， TEM and XPS elucidate the formation mechanism of Mo-doped NiO catalysts with tunable oxygen vacancy concentrations and Ni³⁺/Ni²⁺ ratios， as well as their MOR electrocatalytic performance. A preliminary structure-activity relationship is established， revealing the underlying principles of enhanced activity. This work provides a novel approach for designing efficient anode catalysts for direct methanol fuel cells（DMFCs） with high active site density.

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Aggregation Induced Emission Enhancement of Ligand-Engineered Au Nanoclusters

YE Weiqing, LU Hui, CHEN Wanjing, LI Ningjing, ZHANG Yu, WANG Lihua, LI Jiang, ZHU Ying, LI Mingqiang, FAN Chunhai, JIA Sisi, CHEN Jing

Chem. J. Chinese Universities 2025, 46 (8): 20250100-. DOI: 10.7503/cjcu20250100

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The aggregation-induced emission（AIE） properties of gold nanoclusters（Au NCs） exhibit significant potential for applications in bioimaging， chemical sensing， and optoelectronic devices. However， developing effective design strategies to achieve strong aggregation-induced emission enhancement（AIEE） in Au NCs remains a challenge. In this paper， we report a ligand engineering approach to achieve remarkable AIE enhancement in Au₈ nanoclusters. The quantum yield of aggregated Au₈ NCs showed a ca. 90-fold increase compared to their solution state， with corresponding emission intensity enhancement reaching ca. 560-fold. Through combined optical characterization and metastable component tracking in aggregated systems， we elucidate the underlying AIEE mechanism. Both AIEE and crystallization-induced emission enhancement（CIEE） were activated through ligand engineering， which facilitated （1） shortened inter-cluster distances（from 1.31 nm to 0.72 nm） and （2） effective suppression of intermolecular rotational/vibrational relaxation. This steric-hindrance-reduction strategy establishes a new paradigm for precise modulation of photoluminescence in gold nanoclusters across both aggregated and crystalline states.

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Research Progress on the Mechanism， Synthesis and Application of Solid-state Luminescent Carbon Dots

PAN Zhuohan, AI Lin, LU Siyu

Chem. J. Chinese Universities 2025, 46 (6): 20250081-. DOI: 10.7503/cjcu20250081

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As a 0-dimensional carbon nanomaterial with excellent optical properties， carbon dots（CDs） has been widely used in optoelectronic devices， biological imaging and other fields. However， due to the resonance energy transfer and π-π accumulation caused by the aggregation of solid CDs， the solid emission quenching has greatly hindered its application as phosphors. So the researchers explored a variety of ways to obtain solid-state luminescent CDs. In this paper， the mechanism， classification and research progress of solid-state luminescence CDs are reviewed， and the latest application fields of solid-state luminescence CDs are introduced. Finally， the difficulties and future challenges in the preparation of solid-state luminescent CDs are presented.

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Active Shrinkage Hydrogel Based on Red Emissive Carbon Dots Photosensitizers for Bacterial Infected Wound Healing

HAO Yongliang, LI Jian, WANG Zehua, GE Jiechao

Chem. J. Chinese Universities 2025, 46 (6): 20240409-. DOI: 10.7503/cjcu20240409

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An active shrinkage hydrogel based on red emissive carbon dots（CDs） photosensitizers（PSs） was developed for bacterial infected wound healing. The hydrogel was prepared by using N-isopropylacrylamide （NIPAM）， sodium alginate（SA） and CDs PSs as precursors through free radical polymerization and calcium ion cross-linking. The hydrogel could release CDs PSs at body temperature（37 ℃） due to the active shrinkage of the hydrogel. Upon light irradiation， the released CDs PSs can generate singlet oxygen to kill bacteria effectively in the wound site leading to rapid wound healing. In vitro and in vivo results suggest that the developed active shrinkage hydrogel has good drug release， photodynamic antibacterial effects and the ability to accelerate wound healing， thus providing a new type of hydrogel for clinical wound management.

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Synthesis of the PtxZn/MSN Catalysts and Their Propane Dehydrogenation Properties

WANG Wenxin, SHAN Yiou, SONG Jiaxin, FAN Xiaoqiang, YU Xuehua, KONG Lian, XIAO Xia, XIE Zean, ZHAO Zhen

Chem. J. Chinese Universities 2025, 46 (7): 20250011-. DOI: 10.7503/cjcu20250011

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With the increasing demand of propylene in society， the development of efficient propylene production technology is crucial for both science and the economy. Platinum-based catalysts have been widely studied in propane dehydrogenation（PDH） reactions due to their high ability to activate propane C—H bonds and selectivity towards propylene. In this work， mesoporous silica nanoparticles（MSN） with confinement effect were used as the support， and transition metal zinc was selected as a promoter to control the electronic properties and geometric structure of platinum. PtxZn/MSN catalysts with different zinc loadings were prepared by the impregnation method and the products were characterized by X-Ray diffraction（XRD）， N₂ adsorption-desorption， Raman spectra， CO diffuse reflective infrared Fourier transform spectroscopy（CO-DRIFT）， scanning electron microscope（SEM）， transmission electron microscope（TEM） and X-ray photoelectron specroscopy（XPS）. the PDH performance of PtxZn/MSN was tested. When the zinc loading was 0.5%（mass fraction）， PtxZn/MSN catalyst showed the highest PDH activity with the initial propane conversion and propylene selectivity of 47.9% and 97.0%， respectively. After 6 h reaction， the propane conversion and propylene selectivity were 45.8% and 97.0%， with the propylene production rate of 0.82 mmol/min·g_cat. The characterization results demonstrated that the addition of Zn divided Pt particles into smaller Pt species， which can improve the dispersion of Pt， reduce the occurrence of side reactions， and enhance the stability of the catalyst.

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