摘要
拓宽可见光响应范围及促进光生载流子分离效率是改善光催化剂性能的主要策略。本研究通过在含有富氧空位的氧化锌(ZnO)表面修饰非贵金属铜Cu(O)颗粒,扩大了ZnO的光吸收范围,并增强光诱导电荷的分离。由于局域表面等离子体共振效应,Cu(O)颗粒不仅抑制了电子-空穴对的复合,还增强了氧化锌中氧空位浓度,从而减小其带隙宽度,导致产生更多的光生电荷。以光降解罗丹明B为模型反应,表面修饰富氧空位氧化锌表现出显著增强的光催化活性,其光降解效率是氧化锌的4.3倍。
Photocatalytic performance is improved by broadening the visible-light response range and promoting the separation of photogenerated charge carriers.In this work,the expanded light absorption and the enhanced separation of photo-induced charges in ZnO can be easily realized via the modification of non-noble metallic Cu(O)particles on the oxygen vacancies-rich ZnO.The Cu(O)particles not only suppress the recombination rate of electron-hole pairs owing to its localized surface plasmon resonance effect,but also enhance the oxygen vacancies concentration in ZnO,which narrow the bandgap of ZnO and result in the generation of more photogenerated charges.Taking the photodegradation of rhodamine B as a model reaction,the Cu(O)modified oxygen vacancies-rich ZnO nanostructure exhibits significantly enhanced photocatalytic activity and its photodegradation efficiency is 4.3 times higher than that of the ZnO.
作者
范洪宇
张晓彤
张影
FAN Hong-yu;ZHANG Xiao-tong;ZHANG Ying(School of Petrochemical Engineering,Liaoning Petrochemical University,Fushun 113001,China)
出处
《化学研究与应用》
CAS
北大核心
2024年第11期2529-2535,共7页
Chemical Research and Application
关键词
Cu(O)
氧空位
氧化锌
罗丹明B
光催化
Cu(O)
oxygen vacancies
ZnO
Rhodamine B
photocatalytic degradation
