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Content Provider | World Health Organization (WHO)-Global Index Medicus |
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Author | Sun, Jianhui Qiao, Liping Sun, Shengpeng Wang, Guoliang |
Description | Author Affiliation: Sun J ( Henan Key Laboratory for Environmental Pollution Control, Henan Normal University, College of Chemistry and Environmental Science, No. 46, Jianshe Road, Xinxiang, Henan Province 453007, PR China. sunjh@henannu.edu.cn) |
Abstract | In this paper, the degradation of an azo dye Orange G (OG) on nitrogen-doped TiO2 photocatalysts has been investigated under visible light and sunlight irradiation. Under visible light irradiation, the doped TiO2 nanocatalysts demonstrated higher activity than the commercial Dugussa P25 TiO2, allowing more efficient utilization of solar light, while under sunlight, P25 showed higher photocatalytic activity. According to the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis spectra analyses, it was found that both the nanosized anatase structure and the appearance of new absorption band in the visible region caused by nitrogen doping were responsible for the significant enhancement of OG degradation under visible light. In addition, the photosensitized oxidation mechanism originated from OG itself was also considered contributing to the higher visible-light-induced degradation efficiency. The effect of the initial pH of the solution and the dosage of hydrogen peroxide under different light sources was also investigated. Under visible light and sunlight, the optimal solution pH was both 2.0, while the optimal dosage of H2O2 was 5.0 and 15.0 mmol/l, respectively. |
ISSN | 03043894 |
Issue Number | 1-2 |
Volume Number | 155 |
e-ISSN | 18733336 |
Journal | Journal of Hazardous Materials |
Language | English |
Publisher | Elsevier |
Publisher Date | 2008-06-30 |
Publisher Place | Netherlands |
Access Restriction | Subscribed |
Subject Keyword | Azo Compounds Coloring Agents Light Sunlight Titanium Chemistry Water Pollutants, Chemical Radiation Effects Catalysis Hydrogen Peroxide Hydrogen-ion Concentration Oxidants Photochemistry Waste Disposal, Fluid Methods Water Purification Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry |
Content Type | Text |
Resource Type | Article |
Subject Domain (in MeSH) | Inorganic Chemicals Organic Chemicals Chemical Actions and Uses Physical Phenomena Chemical Phenomena Natural Science Disciplines Environment and Public Health |
Subject | Environmental Engineering Health, Toxicology and Mutagenesis Waste Management and Disposal Pollution Environmental Chemistry |
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