文献类型：期刊文献

英文题名：In-Situ Oxidation of Coooh Decorated on P25 Heterostructure as the Co-Catalyst for Enhanced Photodegradation of Organic Pollutants

作者：Jiang, Haibo[1]; Yang, Kaina[1]; Cao, Shenyang[2,3]; Yu, Shengwei[1]; Sun, Xue[1]; Shou, Shengqiu[1]; Shen, Jianhua[1]

机构：[1] Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science & Technology, Shanghai, 200237, China; [2] State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; [3] Nanjing Institute of Technology, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240324797)

语种：英文

外文关键词：Photocatalytic activity - Photodegradation

摘要：Surface modification of nanoscale titanium dioxide (P25) for photocatalysts can improve carrier separation efficiency by constructing heterojunction structures and reduce reaction energy barriers by introducing co-catalysts. This study describes the successful deposition of CoOOH particles on the P25 surface using solvent-based and in-situ oxidation methods, resulting in a type II P25-CoOOH heterostructure. The photocurrent of P25-CoOOH exhibited a 630% increase compared to pure P25, while showing a reduced surface potential barrier of 2.21 eV. Density functional theory (DFT) simulations demonstrated that the work function of the CoOOH (001) surface (Φ=6.639 eV) is significantly lower than that of P25 (101) (Φ=7.238 eV). Photoluminescence (PL) spectra and active species trapping experiments demonstrated a slower rate of electron and hole recombination in P25-CoOOH compared to pure P25, which effectively reduces electron-hole pair recombination and significantly enhances its photocatalytic activity for degrading methylene blue (MB) by 2.07 times that of P25. These findings suggest that CoOOH not only forms a heterojunction with P25 to improve carrier separation efficiency but also serves as a co-catalyst, increasing the number of active sites on the surface. ? 2024, The Authors. All rights reserved.