NDLI: Photocatalytic Degradation of 4-Nitrophenol on Well Characterized Sol–Gel Molybdenum Doped Titania Semiconductors

Content Provider	SpringerLink
Author	López, Rosendo Gómez, Ricardo
Copyright Year	2011
Abstract	Mesoporous TiO$_{2}$–Mo materials with different Mo contents (0–5.0 wt%) were synthesized by the sol–gel method. In samples annealed at 500 °C, specific surface areas ranging from 150 to 86 m$^{2}$/g were obtained. X-ray diffraction spectra denoted that the titania anatase phase (~28 nm) was significantly strengthened by the presence of Mo. The UV-vis diffuse reflectance spectra showed that the band gap was shifted to lower energy levels in the samples with higher Mo contents. Fourier transform infrared analysis evidenced that the hydroxylated samples persisted after annealing at 500 °C. X-ray photoelectron spectroscopy analyses showed the presence of Mo$^{4+}$ and Mo$^{6+}$ species, where Mo$^{6+}$ can be transformed from this state to a lower oxidation state during the annealing treatments. The study of the photocatalytic degradation of 4-nitrophenol (4-NP) showed that the activity can be related to the c cell parameter of the anatase phase in the Mo-doped semiconductors. Total mineralization of 4-NP up to 98% (TOC) was obtained in the sample (1.0 wt% Mo) with the highest photoactivity.
Starting Page	504
Ending Page	511
Page Count	8
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	54
Issue Number	8-9
e-ISSN	15729028
Language	English
Publisher	Springer US
Publisher Date	2011-01-19
Publisher Place	Boston
Access Restriction	Subscribed
Subject Keyword	Sol–gel Photocatalysts Photodegradation Molybdenum oxide Band-gap energy 4-Nitrophenol Pharmacy Physical Chemistry Characterization and Evaluation of Materials Industrial Chemistry/Chemical Engineering Catalysis
Content Type	Text
Resource Type	Article
Subject	Catalysis Chemistry

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