Fabrication and Characterization of Tailored TiO_2 and WO_3/MWCNT Composites for Methylene Blue Decomposition  

作　　者：ZHU Lei MENG Zeda OH Won-Chun 

机构地区：[1]Department of A dvanced Materials Science ＆ Engineering, Hanseo University, Chungnam 356-706, Korea

出　　处：《催化学报》2011年第6期926-932,共7页

基　　金：suppored by Research Foundation from Hanseo University in 2010

摘　　要：A sol-gel method was used to prepare WO3/MWCNT-TiO2 composites.Their photocatalytic activities were evaluated by the degradation of methylene blue (MB) solution under UV light.The catalysts were characterized by X-ray diffraction,specific surface area measurement,energy-dispersive X-ray analysis,transmission and scanning electron microscopy.Aqueous MB solutions of 100 ml were photodegraded by a small amount of the WO3/MWCNT-TiO2 composite under UV light irradiation.The photocatalytic data showed that the WO3/MWCNT-TiO2 composite achieved a high rate of MB photodegradation.This was attributed to the use of MWCNT which can absorb UV light to create photo-induced electrons,strong adsorption of dye molecules on the photocatalyst,and reduced recombination rate of electron-holes in the WO3/MWCNT-TiO2 composite due to the introduction of the WO3 semiconductor.A sol-gel method was used to prepare WO3/MWCNT-TiO2 composites.Their photocatalytic activities were evaluated by the degradation of methylene blue （MB） solution under UV light.The catalysts were characterized by X-ray diffraction,specific surface area measurement,energy-dispersive X-ray analysis,transmission and scanning electron microscopy.Aqueous MB solutions of 100 ml were photodegraded by a small amount of the WO3/MWCNT-TiO2 composite under UV light irradiation.The photocatalytic data showed that the WO3/MWCNT-TiO2 composite achieved a high rate of MB photodegradation.This was attributed to the use of MWCNT which can absorb UV light to create photo-induced electrons,strong adsorption of dye molecules on the photocatalyst,and reduced recombination rate of electron-holes in the WO3/MWCNT-TiO2 composite due to the introduction of the WO3 semiconductor.

关 键 词：固体超强碱 氧化钙 硝酸钾 氧化铝 氧化锆 氢氧化钾 硝酸钙 

分 类 号：O643[理学—物理化学]