Efficient photocatalytic preparation of 2,5-furandicarboxylic acid on bimetallic Fe/Au decorated TiO2

• Published in: Applied surface science Vol. 672; p. 160771
• Main Authors: Li, Liuqing, Wang, Yaping, Ruan, Yu, Xu, Tiefeng, Wu, Shaoyi, Lu, Wangyang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2024
• Subjects: 2,5-furandicarboxylic acid; Bimetallic decoration; Interface couple; Photocatalyst; TiO2; Interface couple; Bimetallic decoration; 2,5-furandicarboxylic acid; Photocatalyst; TiO2
• ISSN: 0169-4332
• DOI: 10.1016/j.apsusc.2024.160771

[Display omitted] •A bimetallic decorative catalyst with interfacial coupling effect was constructed.•Active Fe3O4 was formed via FePc calcination under air atmosphere.•97% FDCA yield was obtained at ambient temperature under air oxygen and sunlight.•The mechanism for the synthesis of FDCA was investigated.•This study provides a new strategy for the conversion of HMF to FDCA under mild conditions. The photocatalytic oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) is important to facilitate the conversion of biomass into high-value compounds under mild conditions. This study developed Au/TiO2 catalysts through the urea deposition method, subsequently integrating them with iron phthalocyanine (FePc) via ball milling, resulting in FePc/Au-TiO2. These catalysts were calcined at various temperatures. The results indicated that Au nanoparticles are uniformly dispersed on TiO2, and Fe in FePc/Au TiO2 calcined at 410 °C mainly exists in the form of ferrosoferric oxide (Fe3O4). FePc/Au-TiO2 with 30 % FePc which calcined at 410 °C demonstrated outstanding photocatalytic activity, achieving a 97 % yield of FDCA. The effects of various experimental parameters on the conversion of HMF to FDCA were investigated, such as the calcination temperatures, the FePc amount, base, and catalyst dosage. Electron paramagnetic resonance and active species capture tests revealed the catalyst can convert O2 into •O2– and 1O2 through excited electrons and photogenerated holes. This study highlights the role of interfacial coupling interactions in boosting catalytic performance, offering a novel approach for photocatalyst development in converting HMF to FDCA.