Anion-exchange-mediated internal electric field for boosting photogenerated carrier separation and utilization

被引：99

作者：

Han, Tong ^{[1
]}

Cao, Xing ^{[1
]}

Sun, Kaian ^{[1
]}

Peng, Qing ^{[1
]}

Ye, Chenliang ^{[1
]}

Huang, Aijian ^{[1
]}

Cheong, Weng-Chon ^{[2
]}

Chen, Zheng ^{[3
]}

Lin, Rui ^{[4
]}

Zhao, Di ^{[5
]}

Tan, Xin ^{[1
]}

Zhuang, Zewen ^{[1
]}

Chen, Chen ^{[1
]}

Wang, Dingsheng ^{[1
]}

Li, Yadong ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing, Peoples R China

[2] Univ Macau, Fac Sci & Technol, Dept Chem & Phys, Macau, Peoples R China

[3] Anhui Normal Univ, Coll Chem & Mat Sci, Wuhu, Peoples R China

[4] Ludwig Maximilians Univ Munchen, Nanoinst Munich, Munich, Germany

[5] Beijing Inst Technol, Sch Chem & Chem Engn, Beijing Key Lab Photoelect Electrophoton Conversi, Key Lab Cluster Sci,Minist Educ China, Beijing, Peoples R China

来源：

NATURE COMMUNICATIONS | 2021年 / 12卷 / 01期

基金：

国家重点研发计划; 北京市自然科学基金; 中国国家自然科学基金;

关键词：

PHOTOCATALYTIC ACTIVITY; GENERATION; COMPOSITE; OXIDATION; ENERGY; BIOCL; BIOBR; OXIDE; FACET;

D O I：

10.1038/s41467-021-25261-8

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Heterojunctions modulated internal electric field (IEF) usually result in suboptimal efficiencies in carrier separation and utilization because of the narrow IEF distribution and long migration paths of photocarriers. In this work, we report distinctive bismuth oxyhydroxide compound nanorods (denoted as BOH NRs) featuring surface-exposed open channels and a simple chemical composition; by simply modifying the bulk anion layers to overcome the limitations of heterojunctions, the bulk IEF could be readily modulated. Benefiting from the unique crystal structure and the localization of valence electrons, the bulk IEF intensity increases with the atomic number of introduced halide anions. Therefore, A low exchange ratio (similar to 10%) with halide anions (I-, Br-, Cl-) gives rise to a prominent elevation in carrier separation efficiency and better photocatalytic performance for benzylamine coupling oxidation. Here, our work offers new insights into the design and optimization of semiconductor photocatalysts.

引用

页数：11

共 45 条

[1] Photocatalysts for degradation of dyes in industrial effluents: Opportunities and challenges [J].