Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (4): 20210867.doi: 10.7503/cjcu20210867

• Physical Chemistry • Previous Articles     Next Articles

Synthesis of Ultrathin Sm-MOF Nanosheets and Their Visible-light Induced Photodegradation of Mustard Simulant

FENG Li1, SHAO Lanxing1, LI Sijun1, QUAN Wenxuan2, ZHUANG Jinliang1,2()   

  1. 1.Key Laboratory of Functional Materials and Chemistry of Guizhou Province,School of Chemistry and Materials Science
    2.Key Laboratory of Mountainous Environmental Protection of Guizhou,Guizhou Normal University,Guiyang 550001,China
  • Received:2021-12-28 Online:2022-04-10 Published:2022-02-28
  • Contact: ZHUANG Jinliang E-mail:jizhuang@xmu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21861013);the Guizhou Provincial Science and Technology Foundation, China(ZK[2022]corefund034);the Guizhou Characteristic Forestry Industry Research Key Laboratory Project, China(KY[2021]002)

Abstract:

Ultrathin metal-organic frameworks(MOFs) nanosheets are excellent heterogeneous catalysts owing to their unique structural properties, such as high density and exposed surface active sites, short diffusion distance for reactants/products. Herein, by the employment of photoactive 1,3,6,8-tetrakis(p-benzoic acid)pyrene(H4TBAPy) as ligand and lanthanide metal ion Sm3+ as metal node, and benzoic acid as modulator, ultrathin two-dmensional Sm-TBAPy nanosheets were synthesized by microwave method. The morphological and structural information of Sm-TBAPy nanosheets were characterized by SEM, TEM, XRD, UV-Vis DRS, FTIR and N2 adsorption-desorption techniques. The as-synthesized Sm-TBAPy are monodispersed nanosheets with size of 200 nm and thickness of 12 nm. The BET specific surface area is 163 m2/g, and the bandgap is 2.62 eV. Sm-TBAPy nanosheets enable selective photocatalytic conversion of 2-chloroethyl ethyl sulfide(CEES) into CEESO under blue light irradiation at room temperature in the presence of oxygen. The catalysts can be reused for 4 times without significantly decrease in catalytic activity. Moreover, combined with electron paramagnetic resonance spectroscopy, a plausible photocatalytic mechanism was proposed. Benefiting from the similarity of lanthanide series, our strategy is expected to apply for the synthesis of lanthanide-based MOF nanosheets as highly efficient catalysts.

Key words: Ultrathin MOFs nanosheets, Mustard gas, Visible-light photocatalysis, 2-Chloroethyl ethyl sulfide, Microwave synthesis

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