One-step fabrication of mesoporous sulfur-doped carbon nitride for highly selective photocatalytic transformation of native lignin to monophenolic compounds

作     者：Conghao Ku Huiqin Guo Kexin Li Qiong Wu Liushui Yan Conghao Ku;Huiqin Guo;Kexin Li;Qiong Wu;Liushui Yan

作者机构：Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources RecycleNanchang Hangkong UniversityNanchang 330063China National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource utilizationNanchang Hangkong UniversityNanchang 330063China Jiangxi Provincial Experimental Teaching Demonstration Center of Environmental Science and EngineeringNanchang Hangkong UniversityNanchang 330063China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2023年第34卷第1期

页      面：440-445页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：finacially supported by the National Natural Science Foundation of China(Nos.21966023,21665018 and 51568049) the Natural Science Foundation of Jiangxi Province,China(No.20171ACB21035) Jiangxi Province Graduate Student Innovation Special Fund(No.YC2020-S513) 

主　　题：Mesostructure Sulfur-doped carbon nitride Photocatalysis Lignin model compound Native lignin Monophenolic compounds 

摘      要：Photocatalytic selective transform native lignin into valuable chemicals is an attractive but challenging ***,we report a mesoporous sulfur-doped carbon nitride(MSCN-0.5)which is prepared by a facile one-step thermal condensation *** is highly active and selective for the cleavage Cα-Cβbond inβ-O-4 lignin model compound under visible light radiation at room temperature,achieving 99%substrate conversion and 98%Cα-Cβbond cleavage *** studies revealed that the Cβ-H bond of lignin model compounds activated by holes and generate key Cβradical intermediates,further induced the Cα-Cβbond cleavage by superoxide anion radicals(·O2-)to produce aromatic *** Camellia oleifera shell(WCOS)was taken as a representative to further understand the reaction mechanisms on native lignin.33.2 mg of monophenolic compounds(Vanillin accounted for 22%and Syringaldehyde for 34%)can be obtained by each gram of WCOS lignin,which is 2.5 times as that of the pristine carbon *** present work offers useful guidance for designing metal-free heterogeneous photocatalysts for Cα-Cβbond cleavage to harvest monophenolic compounds.