Photocatalytic Degradation of Methyl Orange over Polyoxometalates-anatase Composite under UV Light Irradiation

摘要：

A series of H3PW12O40-Y2O3-TiO2 composites with H3PW12O40 loading ranging from 10% to 30% were prepared by using impregnation method and sol-gel technology. The resulting photocatalysts were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and nitrogen adsorption-desorption determination. The materials exhibit Keggin type and anatase phase structure with large BET surface area. The photocatalytic performance of the composites were assessed through the degradation of methyl orange (MO) under UV light (λ≥365 nm) irradiation. The effects of H3PW12O40 loading, catalyst dose and initial pH of MO solution on the photocatalytic activity were discussed. Initial pH is the most important in the degradation. The suitable condition for photocatalytic degrading MO (50 mL, 10 mg·L-1) is suggested as: 20% loading, 0.03 g dose and pH 1.0. The MO dye was almost totally degraded in 21 min when the optimal condition was employed.

作者: LU Kecheng WANG Yajun FENG Changgen

作者单位: State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, 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: 734-739

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）