FTIR study of the photocatalytic degradation of gaseous benzene over UV-irradiated TiO2nanoballs synthesized by hydrothermal treatment in alkaline solution

Zhengru Zhu, Xinyong Li, Qidong Zhao, Zhenping Qu, Yang Hou, Ling Zhao, Shaomin Liu, Guohua Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

17 Citations (Scopus)

Abstract

In this study, photocatalysts of TiO2nanoballs were obtained via a hydrothermal treating of commercial P25 in alkaline solution, and then characterized with SEM, XRD, BET and surface photovoltage spectroscopy techniques. The UV-assisted photodegradation of gaseous benzene over P25 and the prepared TiO2nanoballs was monitored by an in situ infrared technique. The results demonstrated that the prepared TiO2nanoballs in anatase form were more active than commercial P25 in photocatalytic oxidation of gaseous benzene. The promoted activity of the hydrothermal-treated TiO2is attributed to the increasing specific surface area and larger band gap induced by the reduced crystallite size. The spectra of FTIR indicated that weakly adsorbed phenol was formed as the reaction progress. Hydroxyl groups on the surface of TiO2nanoballs are able to react with photo-produced phenol, which is then retained on the catalyst surface leading to the progressive deactivation of the catalyst in the gas-solid system.
Original languageEnglish
Pages (from-to)1889-1893
Number of pages5
JournalMaterials Research Bulletin
Volume45
Issue number12
DOIs
Publication statusPublished - 1 Dec 2010
Externally publishedYes

Keywords

  • A. Oxides
  • B. Chemical synthesis
  • D. Catalytic properties
  • D. Optical properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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