« Previous AbstractMatrix effect on the performance of headspace solid phase microextraction method for the analysis of target volatile organic compounds (VOCs) in environmental samples    Next AbstractEffects of mating disruption treatments on navel orangeworm (Lepidoptera: Pyralidae) sexual communication and damage in almonds and pistachios »

J Nanosci Nanotechnol

Title:		Mechanism for enhancement of visible light response on nitrogen-doped TiO2 by modification with vanadium species
Author(s):		Higashimoto S; Ushiroda Y; Azuma M;
Address:		"Department of Applied Chemistry College of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan"
Journal Title:		J Nanosci Nanotechnol
Year:		2010
Volume:		10
Issue:		1
Page Number:		246 - 251
DOI:		10.1166/jnn.2010.1516
ISSN/ISBN:		1533-4880 (Print) 1533-4880 (Linking)
Abstract:		"Photocatalytic activities of nitrogen-doped TiO2 (N-TiO2) will remarkably increase by surface modification with vanadium (+V) species for the decomposition of volatile organic compounds (VOCs) in the presence of O2 under visible light irradiation. Study on the electron spin resonance (ESR) shows that the vanadium (+V) species interacted with N-TiO2 surface is photo-reduced to form vanadium (+IV) in vacuum or in the presence of hole scavengers under visible light irradiation, and subsequently, it is re-oxidized into vanadium (+V) by O2. Furthermore, the concentration of visible light induced holes (.N radicals) on V-oxide/N-TiO2 is much higher than that on N-TiO2. Therefore, it is confirmed that the added vanadium species having oxidation states between +IV and +V that interact with surface N-TiO2 play significant roles as redox mediators in the effective charge separation of holes and electrons, which consequently brings about an enhancement of photocatalytic activity"
Keywords:
Notes:		"PubMed-not-MEDLINEHigashimoto, Shinya Ushiroda, Yoshiaki Azuma, Masashi eng 2010/04/01 J Nanosci Nanotechnol. 2010 Jan; 10(1):246-51. doi: 10.1166/jnn.2010.1516"