文献类型：期刊文献

英文题名：Novel Indium Oxide Quantum Dot-Loaded Carbon Nitride Heterojunctions Promoted S-Scheme Electron Transfer by Oxidized in Monomers

作者：Li, Xiang[1] Wang, Yunyi[2] Wu, Ting[1] Fang, Guigan[1,3]

第一作者：Li, Xiang

机构：[1] Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Key Lab. of Biomass Energy and Material, Jiangsu Province, Co-Innovation Center of Efficient Processing and Utilization of Forest Resource, Jiangsu Province, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, National Engineering Lab. for Biomass Chemical Utilization, Nanjing, 210042, China; [2] Heilongjiang Provincial Key University Laboratory of Processing Agricultural Products, College of Food and Bioengineering, Qiqihar University, Qiqihar, 161006, China; [3] Shandong Huatai Paper Co., Ltd., Shandong Province, Dongying, 257335, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230451799)

语种：英文

外文关键词：Carbon nitride - Carrier lifetime - Conversion efficiency - Degradation - Heterojunctions - Indium compounds - Nanocrystals - Photoelectricity - Thermooxidation

摘要：Graphitic carbon nitride (g-C3N4) photodegradation technology provides a clean and economical treatment of carcinogenic food colorants due to its mild reaction conditions and sunlight-driven characteristics. Since the fast electron-hole pair complex of g-C3N4 constrains its degradation efficiency, the construction of heterojunctions is a popular solution. Conventional methods of preparing g-C3N4 heterojunctions by physical mixing destroy the π-conjugation of g-C3N4, which reduces the adsorption of food colorants. A novel indium oxide (In2O3) quantum dot-g-C3N4 0D/2D heterojunction was prepared by high-temperature oxidation of pre-prepared indium-doped g-C3N4. Combined with the formation of intersecting interfaces, the adsorption capacity of In2O3-g-C3N4 heterojunctions for food colorants is increased by more than three times. The strong combination of the two increases the area of the intersection interface, which promotes the S-scheme transfer route of photogenerated electrons, thus enhancing the photoelectric conversion efficiency and carrier lifetime of the heterojunction. The degradation rate of three common food colorants (lemon yellow, sunset yellow and allura red) by the heterojunction exceeded 95% after 20 min of sunlight irradiation. Combined with inhibitor experiments and LC-MS analyses, this paper proposes possible photodegradation reaction routes and defines oxidation reaction sites for three food colorants. ? 2023, The Authors. All rights reserved.