SrTiO3/BiOI heterostructure: Interfacial charge separation, enhanced photocatalytic activity, and reaction mechanism

作     者：Ruimin Chen Hong Wang Huizhong Wu Jianping Sheng Jieyuan Li Wen Cui Fan Dong 陈瑞敏;王红;武慧中;盛剑平;李解元;崔雯;董帆

作者机构：Chongqing Key Laboratory of Catalysis and New Environmental MaterialsCollege of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400067China Research Center for Environmental Science&TechnologyInstitute of Fundamental and Frontier SciencesUniversity of Electronic Science and Technology of ChinaChengdu 611731China College of Architecture and EnvironmentSichuan UniversityChengdu 610065SichuanChina The Center of New Energy Materials and TechnologySchool of Materials Science and EngineeringSouthwest Petroleum UniversityChengdu 610500SichuanChina 

基　　金：supported by the National Natural Science Foundation of China(21822601,21501016,21777011) the National R&D Program of China(2016YFC02047) the Innovative Research Team of Chongqing(CXTDG201602014) the Natural Science Foundation of Chongqing(cstc2017jcyj BX0052)~~ 

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

年 卷 期：2020年第41卷第4期

页      码：710-718页

摘      要：Heterostructured photocatalysts provide an effective way to achieve enhanced photocatalytic performances through efficient charge *** both wide-and narrow-band-gap photocatalysts have been widely investigated,the charge separation and transfer mechanism at the contacting interface of the two has not been fully ***,a novel SrTiO3/BiOI(STB)heterostructured photocatalyst was successfully fabricated by using a facile *** heterostructure in the photocatalyst extends the photoabsorption to the visible light range,and thus,high photocatalytic NO removal performance can be achieved under visible light irradiation.A combination of experimental and theoretical evidences indicated that the photogenerated electrons from the BiOI semiconductor can directly transfer to the SrTiO3 surface through a preformed electron delivery *** electron transfer was expected between the SrTiO3 and BiOI surfaces under light irradiation,and leads to efficient ROS generation and thus a high NO conversion ***,in situ diffused reflectance infrared Fourier transform spectroscopy revealed that STB can better inhibit the accumulation of the toxic intermediate NO2 and catalyze the NO oxidation more *** work presents a new insight into the mechanism of the interfacial charge separation in heterostructures and provides a simple strategy to promote the photocatalytic technology for efficient and safe air purification.

主 题 词：Heterostructure SrTiO3/BiOI Charge separation Photocatalysis Reaction mechanism 

学科分类：081704[081704] 07[理学] 0817[工学-轻工类] 070304[070304] 08[工学] 0703[理学-化学类] 

核心收录：

D　O　I：10.1016/S1872-2067(19)63472-8

馆 藏 号：203878609...