Effect of Microstructures on the Acidity and Catalytic Performance for H2Ti3O7 Nanomaterials. Issue 32 (27th August 2020)

• Record Type: Journal Article
• Authors: Xu, Congbo; He, Jie; Zhang, Wei; Cui, Hongshan; Zhu, Jichao; Hu, Lifang
• Is Part Of: ChemistrySelect. Volume 5:Issue 32(2020)
• Page Start: 10081
• Page End: 10089
• Publication Date: 2020-08-27
• Subjects: Brønsted acid -- Confinement effect -- Esterification -- Microstructure -- Solid acid catalysts; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202002739
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: The effects of the microstructure of H2 Ti3 O7 nanomaterials on the acidity and catalytic performance were examined. Layered metal oxides H2 Ti3 O7, two‐dimensional H2 Ti3 O7 nanosheets and one‐dimensional H2 Ti3 O7 nanotubes were successfully synthesized. The physicochemical properties of the as‐prepared catalysts were characterized by XRD, SEM, TEM, TG, BET, LRS and Py‐FTIR. Esterification of acetic acid with n ‐butanol was employed as test reaction to evaluate the catalytic performance of the as‐prepared solid acid catalysts. The results show that the microstructure is important to the catalytic activity, and the catalytic performance of the nanotubes is significantly higher than the values from nanosheets and layered H2 Ti3 O7 . H2 Ti3 O7 nanotubes with multi‐walled scroll‐type open end structure possess the largest specific surface area among the as‐prepared catalysts, and it has stronger Brønsted acid strength and larger acid amount than that of nanosheets. The high catalytic activity for nanotubes may result from surface acid characteristics and confinement effect. Abstract : The as‐prepared H2 Ti3 O7 nanotubes exhibit remarkably enhanced catalytic performance towards the reaction of acetic acid with n ‐butanol compared with layered H2 Ti3 O7 and H2 Ti3 O7 nanosheets. H2 Ti3 O7 nanotubes with multi‐walled scroll‐type open end structure possess the largest specific surface area among the as‐prepared catalysts, and it has stronger Brønsted acid strength and larger acid amount than that of nanosheets. The high catalytic activity for nanotubes may result from surface acid characteristics and confinement effect.