Ipolymer Cd 3 (C 3 N 3 S 3 ) 2 /Zn 3 (C 3 N 3 S 3 ) 2 S- scheme heterojunction enhances photocatalytic H 2 production

The preparation of S-scheme heterojunctions has attracted considerable attention in the academic community as a highly effective approach to enhance the separation and migration of electrons and holes, thereby significantly improving the catalytic efficiency of photocatalysts. In this work, a novel S-scheme ipolymer heterojunction photocatalyst, Cd 3 (C 3 N 3 S 3 ) 2 /Zn 3 (C 3 N 3 S 3 ) 2 (CdTMT/ZnTMT), which synergy with pi-conjugate system, was synthesized using an innovative in-situ hydrothermal method. Through a series of rigorous characterization tests, the formation of an S-scheme heterojunction between CdTMT and ZnTMT was confirmed. Particular emphasis is placed on the effective enhancement of photocatalytic activity of photocatalysts through pi-conjugated orbitals and built-in electric field after combining double-organic conjugated polymer-shaped ZnTMT and CdTMT. Performance tests that show the photocatalytic hydrogen evolution performance of the composite was significantly boosted to an impressive 45.24 mmol center dot g -1 center dot h -1 , which is 215.43 times that of single catalyst ZnTMT and 1.76 times that of CdTMT. Finally, this paper discusses the possibility and development prospect of double polymer to construct S-scheme heterojunctions to improve the activity of photocatalysts. (c) 2024, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.