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Microwave assisted rapid and complete degradation of atrazine using TiO(2) nanotube photocatalyst suspensions.
J Hazard Mater. 2007 Jul 16; 145(3):424-30.JH

Abstract

A technology, microwave-assisted photocatalysis on TiO(2) nanotubes, which can be applied to degrade atrazine rapidly and completely, was investigated. TiO(2) nanotubes were prepared, and confirmed by XRD, TEM and ESR. Microwave-assisted photocatalytic degradation of atrazine in aqueous solution was investigated. The result indicates that atrazine is completely degraded in 5min and the mineralization efficiency is 98.5% in 20min, which is obviously more efficient than that by the traditional photocatalytic degradation methods. It may be attributed to the intense UV radiation generated by electrodeless discharge lamps under microwave irradiation, the increased number of OH, additional defect sites on TiO(2) under the irradiation of microwave and larger specific surface area of TiO(2) nanotubes which could adsorb more organic substances to degrade than TiO(2) nanoparticles. Along with the degradation of atrazine, the concentrations of Cl(-) and NO(3)(-) increase gradually. In 20min [Cl(-)] and [NO(3)(-)] are 3, 27.8mg/L, respectively, which are close to their stoichiometric values. The major intermediates of atrazine were identified by HPLC/MS and possible degradation pathways of atrazine in microwave-assisted photocatalysis on TiO(2) nanotubes were proposed.

Authors+Show Affiliations

State Key Laboratory of Pollution Control and Resources, School of the Environment, Nanjing University, Nanjing 210093, China.No 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

17188429

Citation

Zhanqi, Gao, et al. "Microwave Assisted Rapid and Complete Degradation of Atrazine Using TiO(2) Nanotube Photocatalyst Suspensions." Journal of Hazardous Materials, vol. 145, no. 3, 2007, pp. 424-30.
Zhanqi G, Shaogui Y, Na T, et al. Microwave assisted rapid and complete degradation of atrazine using TiO(2) nanotube photocatalyst suspensions. J Hazard Mater. 2007;145(3):424-30.
Zhanqi, G., Shaogui, Y., Na, T., & Cheng, S. (2007). Microwave assisted rapid and complete degradation of atrazine using TiO(2) nanotube photocatalyst suspensions. Journal of Hazardous Materials, 145(3), 424-30.
Zhanqi G, et al. Microwave Assisted Rapid and Complete Degradation of Atrazine Using TiO(2) Nanotube Photocatalyst Suspensions. J Hazard Mater. 2007 Jul 16;145(3):424-30. PubMed PMID: 17188429.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Microwave assisted rapid and complete degradation of atrazine using TiO(2) nanotube photocatalyst suspensions. AU - Zhanqi,Gao, AU - Shaogui,Yang, AU - Na,Ta, AU - Cheng,Sun, Y1 - 2006/11/25/ PY - 2006/09/15/received PY - 2006/11/16/revised PY - 2006/11/16/accepted PY - 2006/12/26/pubmed PY - 2007/9/28/medline PY - 2006/12/26/entrez SP - 424 EP - 30 JF - Journal of hazardous materials JO - J Hazard Mater VL - 145 IS - 3 N2 - A technology, microwave-assisted photocatalysis on TiO(2) nanotubes, which can be applied to degrade atrazine rapidly and completely, was investigated. TiO(2) nanotubes were prepared, and confirmed by XRD, TEM and ESR. Microwave-assisted photocatalytic degradation of atrazine in aqueous solution was investigated. The result indicates that atrazine is completely degraded in 5min and the mineralization efficiency is 98.5% in 20min, which is obviously more efficient than that by the traditional photocatalytic degradation methods. It may be attributed to the intense UV radiation generated by electrodeless discharge lamps under microwave irradiation, the increased number of OH, additional defect sites on TiO(2) under the irradiation of microwave and larger specific surface area of TiO(2) nanotubes which could adsorb more organic substances to degrade than TiO(2) nanoparticles. Along with the degradation of atrazine, the concentrations of Cl(-) and NO(3)(-) increase gradually. In 20min [Cl(-)] and [NO(3)(-)] are 3, 27.8mg/L, respectively, which are close to their stoichiometric values. The major intermediates of atrazine were identified by HPLC/MS and possible degradation pathways of atrazine in microwave-assisted photocatalysis on TiO(2) nanotubes were proposed. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17188429/Microwave_assisted_rapid_and_complete_degradation_of_atrazine_using_TiO_2__nanotube_photocatalyst_suspensions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(06)01400-2 DB - PRIME DP - Unbound Medicine ER -