Atomic-level insight of sulfidation-engineered Aurivillius-related Bi_(2)O_(2)SiO_(3) nanosheets enabling visible light low-concentration CO_(2) conversion  

作　　者：Kai Wang Yue Du Yuan Li Xiaoyong Wu Haiyan Hu Guohong Wang Yao Xiao Shulei Chou Gaoke Zhang 

机构地区：[1]College of Urban and Environmental Sciences,Hubei Key Laboratory of Pollutant Analysis and Reuse Technology,Institute for Advanced Materials,Hubei Normal University,Huangshi,Hubei,China [2]School of Resources and Environmental Engineering,Wuhan University of Technology,Wuhan,Hubei,China [3]Institute for Carbon Neutralization,College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou,Zhejiang,China

出　　处：《Carbon Energy》2023年第2期1-11,共11页碳能源（英文）

基　　金：Natural Science Foundation of Hubei Province,Grant/Award Number:2021CFB242;Research Project of Hubei Provincial Department of Education,Grant/Award Number:Q20202501;China Postdoctoral Science Foundation,Grant/Award Number:2020M682878;National Natural Science Foundation of China,Grant/Award Numbers:51971124,52104254,52171217;State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University,Grant/Award Number:EIPE22208;National Postdoctoral Program for Innovative Talents,Grant/Award Number:BX20200222。

摘　　要：Unraveling atomic-level active sites of layered photocatalyst towards lowconcentration CO_(2) conversion is still challenging.Herein,the yield and selectivity of photocatalytic CO_(2) reduction of the Aurivillius-related oxide semiconductor Bi_(2)O_(2)SiO_(3) nanosheet(BOSO)were largely improved using a surface sulfidation strategy.The experiment and theoretical calculation confirmed that surface sulfidation of the Bi_(2)O_(2)SiO_(3) nanosheet(S-BOSO,6.28 nm)redistributed the charge-enriched Bi sites,extended the solar spectrum absorption to the whole visible range,and considerably enhanced the charge separation,in addition to creating new reaction active sites,as compared to pristine BOSO.Subsequently,surface sulfidation played a switchable role,wherein S-BOSO showed a very high CH_(3)OH generation rate(12.78μmol g^(-1) for 4 h,78.6%selectivity)from low-concentration CO_(2)(1000 ppm)under visible light irradiation,which outperforms most of the state-of-the-art photocatalysts under similar conditions.This study presents an atomic-level modification protocol for engineering reactive sites and charge behaviors to promote solar-to-energy conversion.

关 键 词：[Bi_(2)O_(2)]^(2)+layer Bi_(2)O_(2)SiO_(3) low-concentration CO_(2)reduction photocatalysis SULFIDATION 

分 类 号：TQ028.17[化学工程] X701[环境科学与工程—环境工程] O645.1[理学—物理化学]