FTIR study of the photocatalytic degradation of gaseous benzene over UV-irradiated TiO{sub 2} nanoballs synthesized by hydrothermal treatment in alkaline solution

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2010.09.007· OSTI ID:22209954

Zhu, Zhengru ^[1]; Li, Xinyong ^[1]; Zhao, Qidong; Qu, Zhenping; Hou, Yang; Zhao, Ling ^[1]; Liu, Shaomin ^[2]; Chen, Guohua ^[3]

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1. Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Sciences and Technology, Dalian University of Technology, Dalian 116024 (China)
2. Department of Chemical Engineering, Curtin University of Technology, Perth, WA 6845 (Australia)
3. Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon (Hong Kong)

In this study, photocatalysts of TiO{sub 2} nanoballs 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 TiO{sub 2} nanoballs was monitored by an in situ infrared technique. The results demonstrated that the prepared TiO{sub 2} nanoballs in anatase form were more active than commercial P25 in photocatalytic oxidation of gaseous benzene. The promoted activity of the hydrothermal-treated TiO{sub 2} is 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 TiO{sub 2} nanoballs 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.

• OSTI ID: 22209954
• Journal Information: Materials Research Bulletin, Vol. 45, Issue 12; Other Information: Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
BENZENE
CATALYSTS
FOURIER TRANSFORMATION
INFRARED SPECTRA
IRRADIATION
OPTICAL PROPERTIES
PHENOL
PHOTOCATALYSIS
SCANNING ELECTRON MICROSCOPY
SPECIFIC SURFACE AREA
SPECTROSCOPY
SURFACES
SYNTHESIS
TITANIUM OXIDES
X-RAY DIFFRACTION