Photocatalytic carboxylation of aromatics and lignin sample with CO2 over tubular hierarchical double heterojunction C/N-In2O3/ZnIn2S4

• Published in: Journal of alloys and compounds 2025-01, Vol.1010, p.178021, Article 178021
• Main Authors: Qin, Long, Zhou, Qian, Liu, Hang, Yang, Mingwei, Zhao, Denghong, Zhou, Jinghang, Gao, Xue, Kong, Shuzhen, Jiang, Heyan
• Format: Article
• Language: English
• Subjects: CO2; Double heterojunction; In-N sites; Lignin sample; O vacancies; Photocatalytic carboxylation
• ISSN: 0925-8388
• DOI: 10.1016/j.jallcom.2024.178021

The photocatalytic conversion of waste carbon resource CO2 is of great significance for the preparation of value-added chemical products. In this work, In-N sites and O vacancies enriched hollow tubular hierarchical double heterojunction photocatalyst C/N-In2O3/ZIS was designed to realize photocatalytic CO2 carboxylation under mild conditions. Various aromatic compounds could easily achieve photocatalytic carboxylation with CO2 through benzene ring sp2 C-H activation, aryl radical generation, as well as value added dicarboxylation acids production. It is worth mentioning that lignin sample could also be carboxylated with two molecules CO2 to produce aromatic dicarboxylic acid and salicylic acid. In dual interfacial heterojunction C/N-In2O3/ZIS, In-N sites and hollow double heterojunctions enhanced fast interfacial charge transfer and photogenerated charge carriers separation was conducive to aryl radical production along with CO2 carboxylation. Moreover, the acceptor-donor compensation mechanism between In-N sites and oxygen vacancies upgraded the light absorption ability and maintained the photocatalytic performance over a wide range of visible light wavelengths. •Photocatalytic CO2 carboxylation to produce aromatic dicarboxylic acid without sacrificial agent.•Prepare aromatic dicarboxylic acid and salicylic acid from lignin sample and 2 molecules of CO2.•Aromatic compounds are used to prepare value-added dicarboxylic acids with 1 atm CO2.•Hollow tubular hierarchical double heterojunction photocatalyst derived from In-MOF.•In-N & O vacancy acceptor-donor compensation mechanism boosts photocatalytic performance.