Visible-light-responsive homologous heterostructure of oxynitrides constructed to boost charge separation and water splitting  

作　　者：Hai Zou Yunfeng Bao Xueshang Xin Yu Qi Tengfeng Xie Fuxiang Zhang 

机构地区：[1]State Key Laboratory of Catalysis,Dalian National Laboratory for Clean Energy,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [2]School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian 116029,China [3]College of Chemistry,Jilin University,Changchun 130012,China

出　　处：《Science China Chemistry》2025年第1期186-191,共6页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China(22332005,21925206,22279138,22261160369,22302194,22409022);the Dalian Supports High-level Talent Innovation and Entrepreneurship Projects(2020RD06);the China Postdoctoral Science Foundation(2023M743423 and 2024T170899)。

摘　　要：Constructing typeⅡheterostructures represents a widely recognized strategy for enhancing charge separation and photocatalytic efficiency,but it remains challenging to fabricate homologous heterostructures based on visible-light-responsive semiconductors,especially for popularly investigated(oxy)nitrides with low thermal stability.Here,we synthesized a homologous heterostructure(denoted as YTON_H)based on the oxynitrides of YTaO_(4-x)N_(y)and YTa ON_(2).This heterostructure exhibits type Ⅱ band structure alignment and intimate interface achieved through a magnesium(Mg)powder-assisted nitridation method.Compared with widely reported heterologous heterostructures,the as-obtained YTON_H homologous heterostructure could similarly exhibit enhanced charge separation as well as photocatalytic water splitting performance with respect to its counterparts(YTaO_(4-x)N_(y)and YTaON_(2)).Meanwhile,detailed structural characterizations and spectroscopy analysis have been made to confirm the formation of heterostructure and promotion of spatial charge separation.

关 键 词：charge separation HETEROSTRUCTURE OXYNITRIDE photocatalysis visible light 

分 类 号：TG1[金属学及工艺—金属学]