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| Degradation of terbuthylazine by TiO2 visible photocatalysis with electro-generated Fenton reagent assistance |
| TANG Jian-jun1, CHEN Yi-qing1, JIANG Tao2, YANG Sheng-hai2 |
1. School of Construction and Environmental Engineering, Shenzhen Polytechnic, Shenzhen 518055, China;
2. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China |
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Abstract A electro-chemical reactor with H2O2 in-situ generation was designed, which using net structure Ir_Ta oxide coated Ti metal as anode, and platelike graphite as cathode, the degradation of terbuthylazine by TiO2 visible-light photocatalysis with electro-generated Fenton reagent (electrogenerated H2O2 and Fe3+) assiatance was also studied. Terbuthylazine could be degraded by TiO2 visible-light photocatalysis with electrogenerated H2O2 assiatance, and the degradation ratio could be 100% after 180 min reaction. Snergistic degradation of terbuthylazine was evidently fast when additionally adding Fe3+, its degradation ratio could be 100% after 30 min reaction. In the degradation process of terbuthylazine, dechlorination was first carried out, and tert-butyl, ethyl, amino groups were then oxidized. Spectrum analysis indicated that the reaction process was predominated by the hydroxyl free radical (·OH) and superoxide radical (·O2-) generation in the system.
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Received: 19 March 2016
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| [1] |
袁霞,高碧芬,万建风,等.具有高活性(001)晶面的Cr-TiO2微球的制备及可见光催化性能[J]. 高等学校化学学报, 2015, 36(2):355-360.
|
| [2] |
Asahi R, Ohwika T, Morikawa T, et al. Visible-light photocatalysis in nitrogen-doped titanium oxides[J]. Science, 2001, 293(13):269-271.
|
| [3] |
Marta M, William B, Colussi A J, et al. Oxidative power of nitrogen-doped TiO2 photocatalysts under visible illumination[J]. J. Phys. Chem. B:2004,108(45):17269-17273.
|
| [4] |
王齐,赵进才,丛燕青,等.无定形TiO2可见光敏化降解染料污染物[J]. 催化学报, 2011,32(6):1076-1082.
|
| [5] |
Li X Z, Chen C C, Zhao J C, et al. Mechanism of photodecomposition of H2O2 on TiO2 surfaces under visible light irradiation[J]. Langmuir, 2001,17:4118-4122.
|
| [6] |
Yao Y F, Chu W. Reaction mechanism of linuron degradation in TiO2 suspension under visible light irradiation with the assistance of H2O2[J]. Environ. Sci. Technol., 2009,43:6183-6189.
|
| [7] |
Yao Y F, Chu W. Linuron decomposition in aqueous semiconductor suspension under visible light irradiation with and without H2O2[J]. Chemical Engineering Journal, 2010,158:181-187.
|
| [8] |
唐建军,邹原. TiO2-Fe3+可见光催化H2O2降解阿特拉津的协同效应[J]. 环境科学学报, 2013,33(3):736-741.
|
| [9] |
李庆奎,周秉彦. H2O2助TiO2可见光催化降解水中的扑草净[J]. 郑州大学学报, 2014,35(1):55-59.
|
| [10] |
Ohno T, Mitsui T, Matsumura M. TiO2-photocatalyzed oxidation of adamantane in solutions containing oxygen or hydrogen peroxide[J]. J. Photochem. Photobio A:Chem., 2003,160:3-9.
|
| [11] |
Liu W, Liu H C, Ai Z H. In-situ generated H2O2 induced efficient visible light photo-electrochemical catalytic oxidation of PCPNa with TiO2[J]. J. Hazard. Mater., 2015,288:97-103.
|
| [12] |
Rosales E, Pazos M, Sanroman M A. Advances in the electroFenton process for remediation of recalcitrant organic compounds[J]. Chem. Eng. Technol., 2012,35:609-617.
|
| [13] |
Li X Z, Liu H S. Development of an E-H2O2 TiO2 photoelectrocatalytic oxidation system for water and wastewater treatment, Environ. Sci. Technol[J]. 2005,39:4614-4620.
|
| [14] |
Jin Y N, Zhao G H, Wu M F, et al. In situ induced visible-light photoeletrocatalytic activity from molecular oxygen on carbon aerogel-supported TiO2[J]. J. Phys. Chem. C, 2011,115:9917-9925.
|
| [15] |
Ishibashi K, Fujishima A, Watanabe T. Detection of Active Oxidative Species in TiO2 Photocatalysis Using the Fluorescence Technique[J]. Electrochemistry Communications, 2000,2:207-210.
|
| [16] |
刘瑞恒,付时雨,詹怀宇.氯化硝基四氮唑蓝显色检测超氧阴离子自由基的研究[J]. 分析测试学报, 2008,27(4):355-359.
|
|
|
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