Synthesis of novel hollow CdS/UMCM-1 photocatalyst with enhanced photocatalytic degradation of organic pollutants and hydrogen production

Abstract

Design of photocatalyst with high stability, efficiency to achieve rapid separation of photogenic carrier and enhanced photocatalytic activity is a key challenge. Herein, integrating hollow CdS nanospheres on the surface of the metal-organic frameworks UMCM-1 to form a novel CdS/UMCM-1 heterojunction by solvothermal method, and the structure of the catalyst was characterized by SEM, TEM, FT-IR spectra and PXRD. The properties of CdS/UMCM-1 photocatalyst was evaluated by eliminating organic pollutants (Rhodamine b(RhB), Tetracycline(TC)) and hydrogen production under visible light, and the results showed that CdS/UMCM-1 heterojunction exhibited excellent photocatalytic performance compared with the pristine CdS nanospheres and UMCM-1. A S-type photocatalytic mechanism was proposed based on radical trapping experiments, electron spin resonance (ESR) analyses and the degradation pathway of RhB and TC. CdS/UMCM-1 heterojunction possessed a great stability and reusability making them interesting for applications in the environmental and clean energy fields.