文献类型：期刊文献

英文题名：Efficient and selective cleavage of lignin C-C bonds under visible light facilitated by the Zn(II)-doped mesoporous graphitic carbon nitride photocatalyst

作者：Lin, Xiangyu[1] Shen, Minggui[1] Ren, Chunyu[1] Huang, Zhen[2] Li, Zhaoshuang[3] Liu, He[1] Xu, Xu[2]

第一作者：Lin, Xiangyu

通信作者：Shen, MG[1];Xu, X[2];Li, ZS[3]

机构：[1]Chinese Acad Forestry, Co Innovat Ctr Efficient Proc & Utilizat Forest Re, Key Lab Biomass Energy & Mat,Inst Chem Ind Forestr, Key Lab Chem Engn Forest Prod,Natl Forestry & Gras, Nanjing 210042, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Coll Chem Engn, Jiangsu Coinnovat Ctr Efficient Proc & Utilizat Fo, Nanjing 210037, Peoples R China;[3]Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Peoples R China

年份：2025

卷号：354

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20242916705722);Scopus(收录号：2-s2.0-85198332476);WOS:【SCI-EXPANDED(收录号:WOS:001269255800001)】；

基金：We gratefully acknowledge the Key Program of National Natural Science Foundation of China (32330073) and the Fundamental Research Funds of CAF (CAFYBB2020QC003) for the financial support.

语种：英文

外文关键词：Photocatalyst; Visible-light; Lignin depolymerization; Selective cleavage

摘要：Despite the promise of photocatalysis for extracting aromatic compounds from renewable lignin feedstocks, the selective cleavage of C alpha-C beta bonds in lignin under mild conditions poses a persistent challenge, primarily due to their elevated dissociation energies and steric hindrance. Herein, an efficient photocatalytic strategy for selectively breaking the C alpha-C beta bonds of lignin with visible-light irradiation and room temperature is proposed, facilitated by the Zn(II)-doped porous graphitic carbon nitride (Zn/CN) photocatalyst. Reduced energy band gap and photoluminescence, along with intensified visible-light absorption and enhanced photocurrent of Zn/CN, contribute to its efficacy in photocatalytic activity. Consequently, the lignin model compound (2-phenoxy-1phenylethanol) achieves a conversion rate of 99 %, demonstrating a notable selectivity of 97 % in specifically breaking the C alpha-C beta bonds. Mechanistic investigations identify that photogenerated holes play a pivotal role during the photocatalytic conversion. Additionally, the activity and selectivity of Zn/CN photocatalyst are further confirmed by the successful photocatalytic conversion of pine kraft lignin, yielding high-value chemicals such as benzoic acid and vanillin. This research proposes an economical, efficient, and facile method for utilizing renewable lignin feedstocks under photocatalysis, thus advancing the production of high-value aromatic compounds.