文献类型：期刊文献

英文题名：Efficient selective cleavage of C-C bonds in lignin under visible light enabled by the Fe-doped mesoporous graphitic carbon nitride photocatalyst

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

第一作者：Huang, Zhen

通信作者：Xu, X[1];Li, ZS[2];Shen, MG[3]

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

年份：2024

卷号：222

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20243817045147);Scopus(收录号：2-s2.0-85203651881);WOS:【SCI-EXPANDED(收录号:WOS:001405054400001)】；

基金：This research was financially supported by the Key Program of Na-tional Natural Science Foundation of China (32330073) , the Funda-mental Research Funds of CAF (CAFYBB2020QC003) , and the Postgraduate Research & Practice Innovation Program of Jiangsu Province (KYCX23_1263) .

语种：英文

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

摘要：To obtain high-valued aromatic products, it is paramount to cleave the C-alpha-C-beta bonds in lignin under mild conditions selectively. Nevertheless, this task remains daunting due to the formidable dissociation energies and steric hindrance associated with these bonds. Herein, a facile, efficient and cost-effective strategy for selectively breaking the C-alpha-C-beta bond in lignin with visible-light irradiation and room temperature is proposed, facilitated by the utilization of the ferric-doped mesoporous graphitic carbon nitride (Fe/mpg-CN) photocatalyst. Collective contributed by the reduced band gap and photoluminescence, combined with intensified visible-light absorption and enhanced photocurrent, the effectiveness in photocatalytic activity of Fe/mpg-CN is offered. Specifically, a high conversion rate (98 %) of the lignin model compound (2-phenoxy-1-phenylethanol), coupled with an excellent selectivity of 98 % in cleaving the C-alpha-C-beta bonds is achieved by Fe/mpg-CN. Photogenerated holes are indicated as the main active species through comprehensive mechanistic investigations. Additionally, the successful photocatalytic depolymerization of the complex dimer model compound (conversion rate similar to 96 %) and pine kraft lignin further corroborate the satisfying photocatalytic activity and selectivity of Fe/mpg-CN. This study introduces a promising and viable strategy for the selective breaking of lignin through photocatalysis, offering significant implications for the sustainable production of valuable aromatic compounds.