Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (9): 2332-2341.DOI: 10.1016/S1872-2067(21)63949-9

• Special column on renewable fuel synthesis by photocatalysis and photoelectrocatalysis • Previous Articles     Next Articles

Precisely decorating CdS on Zr-MOFs through pore functionalization strategy: A highly efficient photocatalyst for H2 production

Haijun Hua, Kailai Zhanga, Ge Yana, Litong Shia, Baohua Jiab, Hongwei Huangc, Yu Zhanga, Xiaodong Suna,*(), Tianyi Mab,#()   

  1. aInstitute of Clean Energy Chemistry, Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, Liaoning, China
    bCentre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
    cBeijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China
  • Received:2021-09-16 Accepted:2021-09-28 Online:2022-09-18 Published:2022-07-20
  • Contact: Xiaodong Sun, Tianyi Ma
  • Supported by:
    National Natural Science Foundation of China(52071171);Liaoning Revitalization Talents Program-Pan Deng Scholars(XLYC1802005);Liaoning BaiQianWan Talents Program(LNBQW2018B0048);Natural Science Fund of Liaoning Province for Excellent Young Scholars(2019-YQ-04);Key Project of Scientific Research of the Education Department of Liaoning Province(LZD201902);Department of Education of Liaoning Province(LQN201903);Department of Education of Liaoning Province(LQN202008);Foundation for Young Scholars of Liaoning University(LDQN2019007);Australian Research Council (ARC) Future Fellowship(FT210100298)

Abstract:

Different materials, such as metal sulphides, are often combined with metal-organic frameworks (MOFs) to develop multi-functional composites and improve their photocatalytic properties. However, the high interfacial energy barrier limits the formation and nano-assembly of the heterogeneous junctions between MOFs and metal sulphides. Herein, the heterostructured Zr-MOF-S@CdS are successfully constructed through a sequential synthesis method, in which the mesoporous Zr-MOF are firstly decorated with thioglycolic acid through pore functionalization, and followed by the S2- anion exchange process resulting in the surface close attached growth of CdS onto Zr-MOF-S materials. Due to the presence of molecules linkers, the CdS can be precisely decorated onto Zr-MOF-S without aggregation, which can provide more active sites. Moreover, the intimate connections and the suitable band structures between two materials can also facilitate the photogenerated electron-hole pairs separation. Therefore, the resulting Zr-MOF-S@CdS with appropriate ratio exhibits high photocatalytic activity for water reduction, in which the H2 evolution rate can reach up to 1861.7 μmol·g‒1·h‒1, 4.5 times higher than pure CdS and 2.3 times higher than of Zr-MOF/CdS, respectively. Considering the promising future of MOF-based photocatalysts, this work may provide an avenue for the further design and synthesis MOF-based composite photocatalysts for efficient H2 evolution.

Key words: Zr-MOF, Pore functionalization, Photocatalytic H2 production, Molecular linker, Junction