文献类型：期刊文献

英文题名：Synergistic effect of hierarchical structure and S-scheme heterojunction over O-doped g-C3N4/N-doped Nb2O5 for highly efficient photocatalytic CO2 reduction

作者：Qaraah, Fahim A.[1];Mahyoub, Samah A.[2];Hezam, Abdo[3];Qaraah, Amjad[4];Xin, Feng[4];Xiu, Guangli[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asse, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Univ Rostock, Leibniz Inst Catalysis, D-18059 Rostock, Germany;[4]Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300350, Peoples R China

年份：2022

卷号：315

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20222412209533);WOS:【SCI-EXPANDED(收录号:WOS:000833225300003)】；

基金：This research was financially supported by the Science and Technology Commission of Shanghai Municipality (grant no. 19DZ1205001) and the Shanghai Municipal Bureau of Ecology and Environment grant (grant no. huhuanke [2021] 46). Fahim A. Qaraah is thankful to Prof. Qasem Drmosh for his assistance and valuable suggestions.

语种：英文

外文关键词：3D nanostructures; O-doped g-C3N4; N-doped Nb2O5; S-scheme heterojunctions; CO2 photoreduction

摘要：Reasonable construction and engineering of optimal hierarchical photocatalysts have garnered great attention in terms of promoting CO2 photoreduction into fuel production. Herein, we introduce a novel 3D O-doped g-C3N4/N-doped Nb2O5 (OCNNb) S-scheme heterojunction fabricated using control of each material's surface charge-induced heteroaggregation for photocatalytic CO2 reduction (PCR). The optimized sample converts CO2 with substantially greater rates (the sum production rate of CO and CH4) than the blank control, i.e., O-doped g-C3N4 (OCN) and N-doped Nb2O5 (NNBO). The enhanced photocatalytic efficiency can not only be ascribed to the prevention of photogenerated charge carrier recombination mediated by the S-scheme heterojunction but also to the high specific surface areas and abundance of active sites. In the meantime, work function measurement, in situ irradiated, X-ray photoelectron spectroscopy and electron paramagnetic resonance (EPR) studies confirm the S-scheme photogenerated charge transfer mechanism. This study offers a useful approach for fabricating extremely effective heterojunction photocatalysts to convert solar fuels.