文献类型：期刊文献

英文题名：Construction of 3D flowers-like O-doped g-C3N4-[N-doped Nb2O5/C] heterostructure with direct S-scheme charge transport and highly improved visible-light-driven photocatalytic efficiency

作者：Qaraah, Fahim A.[1];Mahyoub, Samah A.[2];Hezam, Abdo[3];Qaraah, Amjad[4];Drmosh, Qasem A.[5];Xiu, Guangli[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab 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;[5]King Fahd Univ Petr & Minerals KFUPM, Interdisciplinary Res Ctr Hydrogen & Energy Storag, Dhahran 31261, Saudi Arabia

年份：2022

卷号：43

期号：10

起止页码：2637

外文期刊名：CHINESE JOURNAL OF CATALYSIS

收录：;EI(收录号：20224112857576);WOS:【SCI-EXPANDED(收录号:WOS:000884673500003)】；

语种：英文

外文关键词：2D; 3D nanostructure; S-scheme heterojunction; Photocatalytic degradation

摘要：Constructing a suitable heterojunction photocatalytic system from two photocatalytic materials is an efficient approach for designing extremely efficient photocatalysts for a broader range of envi-ronmental, medical, and energy applications. Recently, the construction of a step-scheme hetero-structure system (hereafter called the S-scheme) has received widespread attention in the photo -catalytic field due to its ability to achieve efficient photogenerated carrier separation and obtain strong photo-redox ability. Herein, a novel S-scheme heterojunction system consisting of 2D O-doped g-C3N4 (OCN) nanosheets and 3D N-doped Nb2O5/C (N-NBO/C) nanoflowers is constructed via ultrasonication and vigorous agitation technique followed by heat treatment for the photocata-lytic degradation of Rhodamine B (RhB). Detailed characterization and decomposition behaviour of RhB showed that the fabricated material shows excellent photocatalytic efficiency and stability towards RhB photodegradation under visible-light illumination. The enhanced performance could be attributed to the following factors: fast charge transfer, highly-efficient charge separation, ex-tended lifetime of photoinduced charge carriers, and the high redox capability of the photoinduced charges in the S-scheme system. Various trapping experiment conditions and electron paramagnetic resonance provide clear evidence of the S-scheme photogenerated charge transfer path, meanwhile, the RhB mineralization degradation pathway was also investigated using LC-MS. This study pre-sents an approach to constructing Nb2O5-based S-scheme heterojunctions for photocatalytic appli-cations. (c) 2022, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.