Photocatalytic activity of tungsten oxide nanoparticles prepared via colloid chemistry method

• Main Authors: Che-Ming Kuo, 郭哲銘
• Other Authors: Chang, Chao-Ching
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/64912450799294530135

碩士 === 淡江大學 === 化學工程與材料工程學系碩士班 === 101 === A tungsten oxide (WO3) sol was synthesized via colloidal chemistry method in presence of poly(vinyl alcohol) (PVA) in this study. WO3 nanoparticles were prepared via non-solvent precipitation and calcination after, the morphology, structure, grain size and degree of crystalline were investigated by UV-visible, TEM and XRD. WO3 nanoparticles with sizes ranging from 10 to 25 nm were synthesized and dispersed in the PVA aqueous solution. The structure was from WO3 hydrate to crystal WO3 and the size were increased after aging 9 days at room temperature. The result showed that WO3 synthesized sol has good photogegradation ability. The PVA/WO3 nanocomposite powder precipitated via non-solvent(acetone)showed the photodegradation ability. To find an optimization of calcination condition, different calcination temperature and time were used. The best calcination condition at 450 ˚C for 2h.