文献类型：期刊文献

英文题名：Construction of highly active WO3/TpPa-1-COF S-scheme heterojunction toward photocatalytic H-2 generation

作者：Sun, Long[1,2];Li, Lingling[3];Fan, Jiajie[1];Xu, Quanlong[2];Ma, Dekun[4]

机构：[1]Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450002, Peoples R China;[2]Wenzhou Univ, Coll Chem & Mat Engn, Wenzhou 325027, Peoples R China;[3]Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510006, Peoples R China;[4]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China

年份：2022

卷号：123

起止页码：41

外文期刊名：JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

收录：SCI-EXPANDED(收录号：WOS:000788134200005)、、EI(收录号：20221511940043)、Scopus(收录号：2-s2.0-85127562032)、WOS

基金：This work was supported by the National Natural Science Foun-dation of China (Nos. 52073263 , 21905209 , 21673160) , and the Nat-ural Science Foundation of Henan Province (No. 21230 0410 080) .

语种：英文

外文关键词：Covalent organic framework (COF); WO3; S-scheme heterojunction; Photocatalytic H-2 evolution

外文摘要：The rapid charge recombination and low surface reaction kinetics are the two major constraints to the photocatalytic performance of covalent organic frameworks (COFs). To accelerate the charge separation behavior, TpPa-1-COF is decorated with WO(3 )via an in-situ growth approach, and the resultant WO3/TpPa-1-COF composites show significantly improved photocatalytic performance. Especially, when the WO(3 )loading arrives at 3 wt%, 3%WO3/TpPa-1-COF exhibits the maximum photocatalytic H-2 evolution rate of 19.89 mmol g(-1) h(-1) , which is approximately 4.8 times higher than that of pure TpPa-1-COF. The apparent quantum efficiency (AQE) of 3%WO3/TpPa-1-COF at 420 nm is detected to be 12.4%. X-ray photoelectron spectroscopy (XPS) characterization confirms the formation of internal electric field between WO(3 )and TpPa-1-CF, which can drive the photogenerated charge carrier diffusion in S-scheme mode. As a result, WO3/TpPa-1-COF composite possesses high charge separation efficiency and strong redox ability, which is further supported by the photoelectrochemical results, thus benefiting the photocatalysis process. This work provides a rational strategy to modify COFs in photocatalytic water splitting. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.