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Photocatalytic degradation of Orange G on nitrogen-doped TiO2 catalysts under visible light and sunlight irradiation.
J Hazard Mater. 2008 Jun 30; 155(1-2):312-9.JH

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.

Authors+Show Affiliations

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.cnNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18164810

Citation

Sun, Jianhui, et al. "Photocatalytic Degradation of Orange G On Nitrogen-doped TiO2 Catalysts Under Visible Light and Sunlight Irradiation." Journal of Hazardous Materials, vol. 155, no. 1-2, 2008, pp. 312-9.
Sun J, Qiao L, Sun S, et al. Photocatalytic degradation of Orange G on nitrogen-doped TiO2 catalysts under visible light and sunlight irradiation. J Hazard Mater. 2008;155(1-2):312-9.
Sun, J., Qiao, L., Sun, S., & Wang, G. (2008). Photocatalytic degradation of Orange G on nitrogen-doped TiO2 catalysts under visible light and sunlight irradiation. Journal of Hazardous Materials, 155(1-2), 312-9. https://doi.org/10.1016/j.jhazmat.2007.11.062
Sun J, et al. Photocatalytic Degradation of Orange G On Nitrogen-doped TiO2 Catalysts Under Visible Light and Sunlight Irradiation. J Hazard Mater. 2008 Jun 30;155(1-2):312-9. PubMed PMID: 18164810.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photocatalytic degradation of Orange G on nitrogen-doped TiO2 catalysts under visible light and sunlight irradiation. AU - Sun,Jianhui, AU - Qiao,Liping, AU - Sun,Shengpeng, AU - Wang,Guoliang, Y1 - 2007/11/23/ PY - 2006/12/23/received PY - 2007/11/16/revised PY - 2007/11/20/accepted PY - 2008/1/1/pubmed PY - 2008/8/2/medline PY - 2008/1/1/entrez SP - 312 EP - 9 JF - Journal of hazardous materials JO - J Hazard Mater VL - 155 IS - 1-2 N2 - 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. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/18164810/Photocatalytic_degradation_of_Orange_G_on_nitrogen_doped_TiO2_catalysts_under_visible_light_and_sunlight_irradiation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)01691-3 DB - PRIME DP - Unbound Medicine ER -