Preparation of Dy 3+-doped YVO4/TiO2 Composite Nanofibers with Three-dimensional Net-like Structure and Enhanced Photocatalytic Activity for Hydrogen Evolution †

doi:10.7503/cjcu20190302

Abstract

Abstract:

By employing electrospun TiO₂ nanofibers as substrate and citric acid as soft template, rare earth Dy ³⁺-doped YVO₄/TiO₂ composite nanofibers with net-like structure were prepared via one-step hydrothermal method. The composition, surface morphology and properties were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, N₂ adsorption-desorption, ultraviolet-visible diffuse reflectance spectrum and fluorescence spectrum. The photocatalytic activity of Dy ³⁺-doped YVO₄/TiO₂ compo-site nanofibers was investigated via production of hydrogen from water splitting. The results show that cross-linking and assembly of Dy ³⁺∶YVO₄ nano-branch and TiO₂ nanofibers allows a higher surface area. More active sites could be provided and the mass transfer process during heterogeneous photocatalytic reaction was improved. Moreover, the formation of Dy ³⁺-doped YVO₄/TiO₂ heterojunction could widen the spectral response and improve the utilization of solar light. Meanwhile, the separation of photogenerated electron-hole pairs can be achieved. Thus, the photocatalytic activity towards hydrogen production was improved. The photocatalytic production rate of hydrogen reached 8.63 mmol·h ^-1·g ^-1 under sunlight irradiation, which was 10 times that of pure TiO₂ nanofibers.

Key words: Dy ³⁺-doped YVO₄/TiO₂, Composite fibers, One-step hydrothermal method, Photocatalytic hydrogen production

CLC Number:

O643

TrendMD:

SUN Dawei,LI Yuejun,CAO Tieping,ZHAO Yanhui,YANG Diankai. Preparation of Dy ³⁺-doped YVO₄/TiO₂ Composite Nanofibers with Three-dimensional Net-like Structure and Enhanced Photocatalytic Activity for Hydrogen Evolution ^†[J]. Chem. J. Chinese Universities, 2019, 40(11): 2348.

Figures/Tables 10

Fig.1 SEM images of different samples(A—E) and EDS spectrum of sample DYV/TO3(F) (A) TiO2; (B) DYV/TO1; (C) DYV/TO2; (D) DYV/TO3; (E) DYV/TO4.

Fig.2 XRD patterns of different samples

Fig.3 XPS spectra of the DYV/TO3 sample (A) Survey scan; (B) Ti2p; (C) O1s; (D) Dy3d.

Fig.4 N2 adsorption-desorption isotherm of different samples

Sample	S_BET/(m²·g^-1)	Average pore diameter/nm	Total pore volume/(cm³·g^-1)
TiO₂	29.28	12.46	0.17
DYV/TO1	78.67	20.48	0.16
DYV/TO2	82.43	23.64	0.20
DYV/TO3	93.66	28.53	0.22
DYV/TO4	90.32	27.53	0.21

Fig.5 UV-Vis DRS spectra of different samples

Fig.6 PL spectra of different samples

Fig.7 Photocurrent of TiO2 nanofibers and different composite fibers

Fig.8 Photocatalytic hydrogen production rate of the different samples under simulated sunlight(A) and visible light(B) irradiation

Fig.9 Hydrogen production cycle stability of DYV/TO3 composite fibers

References 20

[1]	Fujishima A., Honda K ., Nature, 1972,238(5358), 37— 38
[2]	Liu Q. J., Lin B. Z., Li P. P., Gao B. F., Chen Y. L., . Chem. J. Chinese Universities, 2017,38(1), 94— 100
	( 刘琼君, 林碧洲, 李培培, 高碧芬, 陈亦琳 . 高等学校化学学报, 2017,38(1), 94— 100)
[3]	Cai Z. Y., Xiong Z. G., Lu X. M., Teng J. H., . J. Mater. Chem. A, 2014,2(2), 545— 552
[4]	Gao X. F., Li H. B., Sun W. T., Chen Q., Tang F. Q., Peng L. M., J. Phys. Chem. C, 2009,113(16), 7531— 7535
[5]	Yang L. X., Luo S. L., Liu R. H., Cai Q. Y., Xiao Y., Liu S. H., Su F., Wen L. F., J. Phys. Chem. C, 2010,114(11), 4783— 4789
[6]	Schneider J., Matsuoka M., Takeuchi M., Zhang J. L., Horiuchi Y., Anpo M., Bahnemann D. W., Chem. Rev., 2014,114(19), 9919— 9986
[7]	Sun D. H., Liu H. R., Li R. Z., Chem.J. Chinese Universities, 2016,37(11), 2050— 2059
	( 孙代红, 刘华荣, 李睿哲 . 高等学校化学学报, 2016,37(11), 2050— 2059)
[8]	Odling G., Robertson N ., ChemPhysChem, 2016,17(18), 2872— 2880
[9]	Sun L. D., Zhang Y. X., Zhang J., Yan C. H., Liao C. S., Lu Y. Q., Solid State Commun., 2002,124(1/2), 35— 38
[10]	Wang H., Meng Y. Q., Yan H., Chem. Commun., 2004, ( 4), 553— 555
[11]	Yu M., Lin J., Wang Z., Fu J., Wang S., Zhang H. J., Han Y. C., Chem. Mater., 2002,14(5), 2224— 2231
[12]	Xu H. Y., Wang H., Yan H., J. Hazard. Mater., 2007,144, 82— 85
[13]	He Y. M., Wu Y., Guo H., Sheng T. L., Wu X. T., J. Hazard. Mater., 2009,1699(1—3), 855— 860
[14]	Fang W. J., Jiang Z., Yu L., Liu H., Shangguan W. F., Terashima C., Fujishima A., J. Catal., 2017,352, 155— 159
[15]	Ren W. J., Ai Z. H., Jia F. L., Zhang L. Z., Fan X. X., Zou Z. G., Appl. Catal. B: Environ., 2007,69(3/4), 138— 144
[16]	Xie F. X., Mao X. M., Fan C. M., Wang Y. W., Mater. Sci. Semicond Process, 2014,27, 380— 389
[17]	Kumar B. V., Velchuri R., Devi V. R., Sreedhar B., Prasad G., Prakash D. P., Kanagaraj M., Arumugam S., Vithal M., J. Solid State Chem., 2011,184(2), 264— 272
[18]	Gao Y., Lin J. Y., Zhang Q. Z., Yu H., Ding F., Xu B. T., Sun Y. G., Xu Z. H., Appl.Catal. B: Environ., 2018,224, 586— 593
[19]	Ahsaine H. A., Eljaouhan A., Slassi A., Ezahri M., Benlhachemi A., Bakiz B., Guinneton F., Gavarri J. R., RSC Adv., 2016,6(103), 101105— 101114
[20]	Zhang M. Y., Shao C. L., Mu J. B., Zhang Z. Y., Guo Z. C., Zhang P., Liu Y. C., CrystEngComm, 2012,4(2), 605— 612

Preparation of Dy ³⁺-doped YVO₄/TiO₂ Composite Nanofibers with Three-dimensional Net-like Structure and Enhanced Photocatalytic Activity for Hydrogen Evolution ^†

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 10

References 20

Related Articles 7

Recommended Articles

Metrics

Comments

[1]	JIANG Shan, SHEN Qianqian, LI Qi, JIA Husheng, XUE Jinbo. Pd-loaded Defective TiO₂ Nanotube Arrays for Enhanced Photocatalytic Hydrogen Production Performance [J]. Chem. J. Chinese Universities, 2022, 43(10): 20220206.
[2]	XU Anqi, LI Bin, DU Fanglin. Synthesis of Ordered Mesoporous TiO₂and Their Application for Hydrogen Production from Photocatalytic Water-splitting [J]. Chem. J. Chinese Universities, 2021, 42(4): 978.
[3]	QU Yang, ZHOU Wei, REN Zhiyu, PAN Kai, JIANG Le, FU Honggang. Controllable Preparation of CdTiO₃ Nanorods and Their Photocatalytic Properties for Hydrogen Production^† [J]. Chem. J. Chinese Universities, 2014, 35(5): 995.
[4]	ZHAO Weiliang, LI Cong, HAN Xu, LI Tingting, ZHANG Guiju, GAN Xin, LI Fumin, FU Wenfu. Syntheses, Properties and Photocatalytic Hydrogen Evolution Efficiency of Cyclometalated Pt(Ⅱ) Complexes Bearing S-methylphenyl Group^† [J]. Chem. J. Chinese Universities, 2014, 35(10): 2214.
[5]	LI Yue-Jun, CAO Tie-Ping, SHAO Chang-Lu, WANG Chang-Hua. Preparation and Energy Stored Photocatalytic Properties of WO₃/TiO₂ Composite Fibers [J]. Chem. J. Chinese Universities, 2012, 33(07): 1552.
[6]	HOU Yuan, DONG Xiang-Ting*, WANG Jin-Xian, LIU Gui-Xia, LI Le-Hui. Preparation and Characterization of YF3:Eu3+ Nanofibers/Polymer Composite Nanofibers [J]. Chem. J. Chinese Universities, 2011, 32(2): 225.
[7]	ZHAO Jin^*, ZHAO Yu-Ping, ZHANG Wei, YUAN Xiao-Yan. Electrospinning of PLGA/Gt Blend System [J]. Chem. J. Chinese Universities, 2009, 30(2): 391.