Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Preparation, characterization and photocatalytic behavior of WO3-fullerene/TiO2 catalysts under visible light | Meng et al. Nanoscale Research Letters 2011 6 459 http content 6 1 459 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Preparation characterization and photocatalytic behavior of WO3-fullerene TiO2 catalysts under visible light Ze-Da Meng Lei Zhu Jong-Geun Choi Chong-Yeon Park and Won-Chun Oh Abstract WO3-treated fullerene TiO2 composites WO3-fullerene TiO2 were prepared using a sol-gel method. The composite obtained was characterized by BET surface area measurements X-ray diffraction scanning electron microscopy energy dispersive X-ray analysis transmission electron microscopy and UV-vis analysis. A methyl orange MO solution under visible light irradiation was used to determine the photocatalytic activity. Excellent photocatalytic degradation of a MO solution was observed using the WO3-fullerene fullerene-TiO2 and WO3-fullerene TiO2 composites under visible light. An increase in photocatalytic activity was observed and WO3-fullerene TiO2 has the best photocatalytic activity it may attribute to the increase of the photo-absorption effect by the fullerene and the cooperative effect of the WO3. Introduction Textile manufacturing involves several processes which generate large quantities of wastewaters. These effluents are highly variable in composition with relatively low biochemical oxygen demand and high chemical oxygen demand contents and are typically characterized as follow first strong color due to residual dyes second recalcitrance due to the presence of compounds such as dyes surfactants and sizing agents and third high salinity high temperature and variable pH 1-3 . The textile effluents effective treatment usually requires a combination of various physical chemical and biological technologies. Some studies researched the treatment of model solutions containing various commercial dyes with emphasis on azo dyes since these are extensively used in dyeing processes. These azo dye molecules are chemically .
