Accelerating directional charge separation via built-in interfacial electric fields originating from work-function differences

作     者：Chao Xue Hua An Guosheng Shao Guidong Yang 薛超;安华;邵国胜;杨贵东

作者机构：State Centre for International Cooperation on Designer Low-carbon and Environmental Materials(CDLCEM)School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001HenanChina XJTU-Oxford International Joint Laboratory for CatalysisSchool of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi'an 710049ShaanxiChina 

基　　金：国家自然科学基金(U1862105) 河南省重点研发与推广专项(科技攻关)(202102210053) 中国博士后科学基金(2019M662515) 王宽诚教育基金 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2021年第42卷第4期

页      码：583-594页

摘      要：In this work,a hierarchical porous SnS_(2)/rGO/TiO_(2)hollow sphere heterojunction that allows highly-efficient light utilization and shortening distance of charge transformation is rationally designed and *** importantly,an rGO interlayer is successfully embedded between the TiO_(2)hollow sphere shells and outermost SnS_(2)*** interlayer functions as a bridge to connect the two light-harvesting semiconductors and acts as a hole injection layer in the tandem *** induced built-in electric fields on both sides of the interface precisely regulate the spatial separation and directional migration of the photo-generated holes from the light-harvesting semiconductor to the rGO hole injection *** synergistic effects greatly prolong the lifetime of the photo-induced charge *** optimized tandem heterojunction with a 2 wt%rGO loading demonstrate enhanced visible-light-driven photocatalytic activity for Rhodamine B(RhB)dye degradation(removal rate:97.3%)and Cr(VI)reduction(removal rate:97.09%).This work reveals a new strategy for the rational design and assembly of hollow-structured photocatalytic materials with spatially separated reduction and oxidation surfaces to achieve excellent photocatalytic performance.

主 题 词：SnS_(2)/rGO/TiO_(2) Hollow sphere Photocatalyst Hole injection layer Cr(VI)reduction 

学科分类：083002[083002] 0830[工学-生物工程类] 081704[081704] 081705[081705] 07[理学] 0817[工学-轻工类] 08[工学] 070304[070304] 0703[理学-化学类] 

核心收录：

D　O　I：10.1016/S1872-2067(20)63649-X

馆 藏 号：203990023...