文献类型：期刊文献

英文题名：Synergistic Selective Photocleavage of Lignin C-C Bonds by Triazine-Rich Tubular Carbon Nitride and High-Temperature Oxidation Treatment

作者：Li, Xiang[1] Zhu, Yawei[1] Fang, Guigan[1,2] Liang, Fangmin[1] Tian, Qingwen[1] Yang, Qiang[1]

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, Co-Innovation Center of Efficient Processing, Utilization of Forest Resource, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, National Engineering Lab. for Biomass Chemical Utilization, Jiangsu Province, Jiangsu Province, Nanjing, 210042, China; [2] 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：20230333286)

语种：英文

外文关键词：Carbon nitride - Desalination - Efficiency - Free radical reactions - Thermooxidation

摘要：The key issue of lignin conversion depends on cutting the β-O-4 linkage bonds between units while keeping the aromatic ring intact. Triazine-heptazine homopolymers of carbon nitride are more prone to break the Cβ-H bond in the β-O-4 bond and generate the critical Cβ radical, compared to the triazine or heptazine structure. Triazine-rich g-C3N4 was successfully prepared by ball milling-thermal polycondensation of melamine and cyanuric acid, which has the advantage of low cost and no desalting compared to the conventional eutectic salt method. The triazine-rich g-C3N4 has higher photocurrent density, lower photogenerated electron-transfer resistance, and less electron-hole recombination. Combined with high-temperature oxidation treatment, g-C3N4-O-Q-A5 has an excellent selective photocleavage efficiency of lignin β-O-4 bonds, which is 340% higher than that of untreated g-C3N4. This paper reveals the localization of holes in the photocleavage β-O-4 bond reaction, and the superoxide radical generation amount are the main factors limiting the photocleavage efficiency. ? 2023, The Authors. All rights reserved.