Investigation of the photocatalytic degradation of organochlorine pesticides on a nano-TiO<sub>2</sub> coated film期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Investigation of the photocatalytic degradation of organochlorine pesticides on a nano-TiO₂ coated film

Authors:	Binbin Yu Jingbin Zeng Lifen Gong Maosheng Zhang Limei Zhang Xi Chen

Affiliation:	^aDepartment of Chemistry and the Key Laboratory of Analytical Sciences of the Ministry of Education, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China ^bState Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen 361005, China ^cDepartment of Chemistry, Quanzhou Normal University, Quanzhou 362000, China

Abstract:	The photocatalytic degradation of organochlorine pesticides including -, β-, γ-, δ-hexachlorobenzene (BHC), dicofol and cypermethrin were carried out on a nano-TiO₂ coated films under UV irradiation in the air. The photocatalytic conditions, including the amount of TiO₂, irradiation time and the intensity of light were optimized. The pesticides were most effectively degraded under the condition of 2.24 mg/cm² on TiO₂ film and a 400 W UV irradiation of high-pressure mercury lamp with a wavelength of 365 nm. A typical organochlorine pesticide, 20 μg -BHC, was dipped onto the TiO₂ film surface and degraded completely within 20 min. In addition, the photocatalytic degradation pathways on the nano-TiO₂ coated film were discussed.

Keywords:	TiO₂ Photocatalytic degradation Organochlorine pesticides Nanocoated film
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