Heterogeneous Photocatalytic Degradation of Pesticide Imidacloprid by Silicotungstic Acid Supported on Mesoporous Material MCM-41

摘要：

A series of new solid polyoxometalate catalysts containing silicotungstic acid H4SiW12O40 (HSiW) supported on mesoporous material MCM-41 are prepared and characterized by FT-IR, X-ray diffraction and nitrogen adsorption. The prepared HSiW/MCM-41 with different HSiW loadings level from 20 wt.% to 60 wt.% possesses large specific surface area and uniform mesopores. The Keggin unit of HSiW retains on the prepared composite catalysts. The photocatalytic performance of HSiW/MCM-41 is examined by degradation of a world-widely used pesticide imidacloprid. Results show that the prepared composites exhibit high activity under irradiation of 365 nm monochromatic Light. For 50 mL imidacloprid (10 mg/L), the conversion of imidacloprid using 20 mg HSiW/MCM-41 with 50 wt.% loading level reaches 45.66 % after 4 hours’ irradiation.

作者: FENG Changgen LI Yanzhou LIU Xia

作者单位: School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China College of Science, China Agricultural University, Beijing 100193, China

会议类型: 国际会议

会议名称: 2011 International Symposium on Environmental Science and Technology(2011 环境科学与技术国际会议 2011 ISEST)

会议地点: 广东东莞

会议语种:英文

页码: 751-756

在线出版日期: 2011-06-01（万方平台首次上网日期，不代表论文的发表时间）