Green and regulable synthesis of CdNCN on CdS semiconductor:Atomic-level heterostructures for enhanced photocatalytic hydrogen evolution  

作　　者：Taiyu Huang Zimo Huang Xixian Yang Siyuan Yang Qiongzhi Gao Xin Cai Yingju Liu Yueping Fang Shanqing Zhang Shengsen Zhang 

机构地区：[1]College of Materials and Energy,South China Agricultural University,Guangzhou 510643,China [2]Institute for Sustainable Transformation,School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China [3]Centre for Clean Environment and Energy,and School of Environment and Science,Gold Coast Campus,Griffith University,Queensland 4222,Australia

出　　处：《Advanced Powder Materials》2024年第6期70-80,共11页先进粉体材料(英文)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22078118,22274059 and 42277219);the Natural Science Foundation of Guangdong Province,China(Nos.2023A1515010740 and 2023A1515030131).

摘　　要：In the realm of photoenergy conversion,the scarcity of efficient light-driven semiconductors poses a significant obstacle to the advancement of photocatalysis,highlighting the critical need for researchers to explore novel semiconductor materials.Herein,we present the inaugural synthesis of a novel semiconductor,CdNCN,under mild conditions,while shedding light on its formation mechanism.By effectively harnessing the[NCN]^(2⁻)moiety in the thiourea process,we successfully achieve the one-pot synthesis of CdNCN-CdS heterostructure photocatalysts.Notably,the optimal CdNCN-CdS sample demonstrates a hydrogen evolution rate of 14.7 mmol g^(-1)h^(-1)under visible light irradiation,establishing itself as the most efficient catalyst among all reported CdS-based composites without any cocatalysts.This outstanding hydrogen evolution performance of CdNCN-CdS primarily arises from two key factors:i)the establishment of an atomic-level N-Cd-S heterostructure at the interface between CdNCN and CdS,which facilitating highly efficient electron transfer;ii)the directed transfer of electrons to the(110)crystal plane of CdNCN,promoting optimal hydrogen adsorption and active participation in the hydrogen evolution reaction.This study provides a new method for synthesizing CdNCN materials and offers insights into the design and preparation of innovative atomic-level composite semiconductor photocatalysts.

关 键 词：CdNCN semiconductor CDS Photocatalytic hydrogen production Atomic-level interface engineer 

分 类 号：O62[理学—有机化学]