Journal
NANOSCALE
Volume 14, Issue 19, Pages 7408-7417Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2nr01809h
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Funding
- National Science Foundation of China [51902156, 51425301]
- Youth Project of the Natural Science Foundation of Jiangsu Province, China [BK20171008]
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Nanotwin and all-solid-state (ASS) Z-scheme heterojunction engineering are two commonly used strategies for improving photocatalytic activity. However, their individual limitations can be overcome by combining them, as demonstrated by the synthesis of a nanotwinned ASS Z-scheme photocatalyst in this study.
Nanotwin and all-solid-state (ASS) Z-scheme heterojunction engineering are two widely used strategies for improving photocatalytic activity in H-2 production. However, both strategies fail to produce a satisfactory effect when used alone due to their own limitations. Hence, combining nanotwin and ASS Z-scheme heterojunction engineering is expected to improve photocatalytic activity effectively. Herein, we report a nanotwinned ASS Z-scheme g-C3N4/CdCO3/CdS (CN/CC/CS) photocatalyst synthesized for the first time by in situ bridging of (CN) and (CS) with a (CC) conductor. The growth and ripening of CN/CC/CS are limited by thiourea (Tu) and CN. CN/CC/CS can improve charge carrier separation and transfer kinetics due to the synergetic advantages of its nanotwin structure, ASS Z-scheme junction, N-Cd chemically bonded interfaces, in situ intimate contact, and hierarchical architecture. The visible-light-driven H-2 production rate of CN/CC/CS is 345% of that of CN/CS. This work proposes a new method for rationally designing novel materials with improved photocatalytic activity by combining heterojunction and defect engineering.
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