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Photocatalytic degradation of diuron in aqueous solution by platinized TiO2.
J Hazard Mater. 2009 Nov 15; 171(1-3):1081-7.JH

Abstract

The photocatalytic degradation of diuron, which is one of phenylurea herbicides, was carried out in the presence of platinized TiO(2) photocatalyst. Platinization was found to increase the rate of diuron degradation. When 0.2wt.% of platinum was deposited onto the surface of TiO(2), an initial diuron concentration of 10 mg L(-1) was completely degraded after 20 min. Furthermore, the first-order rate constant for diuron degradation by Pt-TiO(2) was ca. 4 times higher than P-25 TiO(2). In addition, the photocatalytic activity of Pt-TiO(2) was appeared under visible light. The decrease of TOC as a result of mineralization of diuron was observed during the photocatalytic process. The degree of diuron mineralization was about 97% under UV irradiation after 8h. The formations of chloride, nitrate and ammonium ions as end-products were observed during the photocatalytic system. The decomposition of diuron gave four kinds of intermediate products. The degradation mechanism of diuron was proposed on the base of the evidence of the identified intermediates. Based on these results, the photocatalytic reaction by Pt-TiO(2) could be useful technology for the treatment of wastewater containing diuron.

Authors+Show Affiliations

Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu, Mie 514-8507, Japan. hidek@chem.mie-u.ac.jpNo affiliation info availableNo affiliation info availableNo 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

19604634

Citation

Katsumata, Hideyuki, et al. "Photocatalytic Degradation of Diuron in Aqueous Solution By Platinized TiO2." Journal of Hazardous Materials, vol. 171, no. 1-3, 2009, pp. 1081-7.
Katsumata H, Sada M, Nakaoka Y, et al. Photocatalytic degradation of diuron in aqueous solution by platinized TiO2. J Hazard Mater. 2009;171(1-3):1081-7.
Katsumata, H., Sada, M., Nakaoka, Y., Kaneco, S., Suzuki, T., & Ohta, K. (2009). Photocatalytic degradation of diuron in aqueous solution by platinized TiO2. Journal of Hazardous Materials, 171(1-3), 1081-7. https://doi.org/10.1016/j.jhazmat.2009.06.110
Katsumata H, et al. Photocatalytic Degradation of Diuron in Aqueous Solution By Platinized TiO2. J Hazard Mater. 2009 Nov 15;171(1-3):1081-7. PubMed PMID: 19604634.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photocatalytic degradation of diuron in aqueous solution by platinized TiO2. AU - Katsumata,Hideyuki, AU - Sada,Maki, AU - Nakaoka,Yusuke, AU - Kaneco,Satoshi, AU - Suzuki,Tohru, AU - Ohta,Kiyohisa, Y1 - 2009/06/27/ PY - 2009/04/30/received PY - 2009/06/08/revised PY - 2009/06/20/accepted PY - 2009/7/17/entrez PY - 2009/7/17/pubmed PY - 2010/1/20/medline SP - 1081 EP - 7 JF - Journal of hazardous materials JO - J Hazard Mater VL - 171 IS - 1-3 N2 - The photocatalytic degradation of diuron, which is one of phenylurea herbicides, was carried out in the presence of platinized TiO(2) photocatalyst. Platinization was found to increase the rate of diuron degradation. When 0.2wt.% of platinum was deposited onto the surface of TiO(2), an initial diuron concentration of 10 mg L(-1) was completely degraded after 20 min. Furthermore, the first-order rate constant for diuron degradation by Pt-TiO(2) was ca. 4 times higher than P-25 TiO(2). In addition, the photocatalytic activity of Pt-TiO(2) was appeared under visible light. The decrease of TOC as a result of mineralization of diuron was observed during the photocatalytic process. The degree of diuron mineralization was about 97% under UV irradiation after 8h. The formations of chloride, nitrate and ammonium ions as end-products were observed during the photocatalytic system. The decomposition of diuron gave four kinds of intermediate products. The degradation mechanism of diuron was proposed on the base of the evidence of the identified intermediates. Based on these results, the photocatalytic reaction by Pt-TiO(2) could be useful technology for the treatment of wastewater containing diuron. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19604634/Photocatalytic_degradation_of_diuron_in_aqueous_solution_by_platinized_TiO2_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)01046-2 DB - PRIME DP - Unbound Medicine ER -