文献类型：期刊文献

英文题名：Sunlight-driven superoxide radicals generation from double-modified carbon nitride for efficient lignin beta-O-4 bonds photocleavage

作者：Li, Xiang[1,2,3,4,5,6] Fang, Guigan[1,2,3,4,5,7] Wu, Ting[1,2,3,4,5] Tian, Qingwen[1,2,3,4,5] Yang, Qiang[1,2,3,4,5] Chen, Zupeng[5,6]

第一作者：Li, Xiang

通信作者：Wu, T[1];Wu, T[2];Wu, T[3];Wu, T[4];Wu, T[5]

机构：[1]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China;[2]Key Lab Biomass Energy & Mat, Nanjing 210042, Jiangsu, Peoples R China;[3]Coinnovat Ctr Efficient Proc & Utilizat Forest Res, Nanjing 210042, Jiangsu, Peoples R China;[4]Natl Forestry & Grassland Adm, Key Lab Chem Engn Forest Prod, Nanjing 210042, Peoples R China;[5]Natl Engn Lab Biomass Chem Utilizat, Nanjing 210042, Peoples R China;[6]Nanjing Forestry Univ, Nanjing 210037, Peoples R China;[7]Shandong Huatai Paper Co Ltd, Dongying 257335, Shandong, Peoples R China

年份：2023

卷号：635

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20230125578);Scopus(收录号：2-s2.0-85161814440);WOS:【SCI-EXPANDED(收录号:WOS:001023896100001)】；

基金：This work was financially supported by the foundation of the National Key Research and Development Program (2022YFC2105503) " Industrial Demonstration of Key Technologies for 'Bio-Virgin Pulp' and Functionalized lignin preparation" & amp; " Jie- bangguashuai" Science and Technology Project of Yibin City (2022JB009) .

语种：英文

外文关键词：beta-O-4 bond; Superoxide radicals; Sunlight-driven photocatalytic; Oxygen absorption; DFT calculation

摘要：Lignin has become the largest renewable aromatic resource, and photocatalytic breaking of lignin linkage bonds has emerged as a promising green oxidation technology initiated by solar energy at room temperature. Wherein, carbon nitride (g-C3N4) photo-cracking of lignin has the advantage of stability and reusability (no photo-corrosion), but is inefficient compared to conventional metal sulfides. In this work, g-C3N4 was dual-modified with Cl doping and high-temperature oxidation, to maximum retain the pi-pi conjugation that can absorb the benzene ring structure in lignin. The inhibitor experiments and product composition analysis indicated that superoxide radicals acted as the most crucial active species, which was 4 times higher than that of g-C3N4. The attachment sites of doped Cl on carbon nitride were calculated by comparing the density of states with the actual band gap. The as-fabricated g-C3N4-Cl-A5 photocatalyst showed a longer carrier lifetime and higher oxygen adsorption capacity and demonstrated excellent benzaldehyde production (1.74 mg h(-1)) from the lignin model under sunlight. The work provides insights into the enhanced superoxide radicals generation via photocatalysis and guidance for the selective breaking of lignin beta-O-4 bonds.