文献类型：期刊文献

英文题名：Construction of triazine-heptazine-based carbon nitride heterojunctions boosts the selective photocatalytic C-C bond cleavage of lignin models

作者：Zhang, Qingqing[1];Chu, Yi-Chun[2,3,4];Liu, Zhulan[1];Hong, Mei[1];Fang, Weiwei[1];Wu, Xin-Ping[2,3,4];Gong, Xue-Qing[2,3,4];Chen, Zupeng[1]

机构：[1]Nanjing Forestry Univ, Jiangsu Co Innovat Ctr Efficient Proc & Utilizat F, Int Innovat Ctr Forest Chem & Mat, Nanjing 210037, Peoples R China;[2]East China Univ Sci & Technol, Joint Int Res Lab Precis Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Ctr Computat Chem,Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2023

卷号：331

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20231313817332);WOS:【SCI-EXPANDED(收录号:WOS:001053278600001)】；

基金：This work was supported by the National Natural Science Foundation of China (22202105), the Natural Science Foundation of Jiangsu Province (BK20210608) and the Natural Science Foundation of Jiangsu & nbsp;Higher Education Institutions of China (21KJA150003).

语种：英文

外文关键词：Crystalline carbon nitride; Triazine-heptazine heterojunctions; Photocatalysis; C -C bond cleavage; Lignin valorization

摘要：Photocatalytic lignin depolymerization emerges as a sustainable and cost-competitive strategy to produce lowmolecular-weight aromatic chemicals from renewable resources. Significant efforts have been devoted to engineering C-C bond cleavage photocatalysts with diverse compositional and morphologic characteristics in the past decade. We herein present a facile photocatalytic strategy of promoting C-C bond cleavage in lignin models to achieve high-yield aromatic monomers over triazine-heptazine-based carbon nitride heterojunctions, exceeding the triazine- or heptazine-based counterparts. Mechanistic investigations reveal that the photo-excited electron and hole synergistically trigger the C-C bond cleavage. A combination of experimental results and theoretical calculations confirms that the improved photocatalytic performance is primarily attributed to the accelerated charge carriers separation and migration induced by the built-in electric field at the heterojunction interface, and the facilitated C & beta;-radical generation. These findings highlight the effectiveness of interfacial engineering of intramolecular heterostructures towards the rational promotion of photocatalytic cleavage of C-C bond in lignin models.