Surface modification boosts exciton extraction in confined layered structure for selective oxidation reaction

作     者：Sen Jin Hui Wang Lei Li Xiao Luo Xianshun Sun Ming Zuo Jie Tian Xiaodong Zhang Yi Xie Sen Jin;Hui Wang;Lei Li;Xiao Luo;Xianshun Sun;Ming Zuo;Jie Tian;Xiaodong Zhang;Yi Xie

作者机构：Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei230026China Institute of EnergyHefei Comprehensive National Science CenterHefei230031China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2021年第64卷第11期

页      面：1964-1969页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Key R&D Program of China(2017YFA0207301,2019YFA0210004,2017YFA0303500) the Strategic Priority Research Program of Chinese Academy of Sciences(XDB36000000) the National Natural Science Foundation of China(21922509,21905262,21890754,U2032212,U2032160) 

主　　题：exciton extraction selective oxidation reaction photocatalytic 

摘      要：Extracting photogenerated species from bulk to surface is an essential process for gaining efficient semiconductor-based ***,compared with charged photogenerated carriers,neutral exciton exhibits negligible response to electric ***,traditional strategies involving band-alignment construction for boosting directional transfer of charge carriers are impracticable for extracting bulk *** this issue,we here propose that the extraction of bulk exciton could be effectively implemented by surface *** taking confined layered bismuth oxycarbonate(Bi_(2)O_(2)CO_(3))as an example,we highlight that the incorporation of iodine atoms on the surface could modify the micro-region electronic structure and hence lead to reduced energy of surface excitonic *** from the energy gradient between bulk and surface excitonic states,iodine-modified Bi_(2)O_(2)CO_(3)possesses high-efficiency bulk exciton extraction,and hence exhibits promoted performance in triggering1 O2-mediated selective oxidation *** work presents the positive role of surface modification in regulating excitonic processes of semiconductor-based photocatalysts.