Preparation and Enhanced Photo-catalytic Performance of nc-TiO2/SnO2 Photonic Crystal Composite Membranes

摘要：

An nc-TiO2/SnO2 inverse opal composite membrane was fabricated, the photo-Rctlvlty of which was significantly enhanced by utilizing both slow photons and stop-hand reflection of the photonic crystal layer. The materials of the photonic crystal Inyer must be transparent in the area of adsorption edge of the nc-TiO2, so that SnO2, having much greater electronic band gap than TiO2, was used for the materials of the photonic crystal layer. The photonic band-gap of the SnO2 photonic crystal was dcsigned at the semiconductor band gap of TiO2 to harvest slow photons in the interface between the SnO2 layer and the TiO2 layer. The two layer structure makes it possible to couple the stop-band reflectivity of the photonic layer to the photo-catalyst. Composite membranes can improve solar energy harvesting and substantially improve photo-catalysts for photolysis and photochemical degradation of environmental pollutants.

关键词： Nano-crystalline TiO2 Slow photons Photonic crystals SnO2 Inverse opal Stop-band reflection Photo-catalyst

作者: Sheng-Li Chen Ai-Jun Wang Chun-Tian Hu Chao Dai

作者单位: State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Changping, Beijing, 102249, China

会议类型: 国内会议

会议名称: 中国颗粒学会超微颗粒专委会2011年年会暨第七届海峡两岸超微颗粒学术研讨会

会议地点: 辽宁丹东

会议语种:英文

页码: 11-18

在线出版日期: 2011-08-08（万方平台首次上网日期，不代表论文的发表时间）