Influences of Silver-Doping on the Crystal Structure, Morphology and Photocatalytic Activity of TiO<sub>2</sub>Nanofibers
Influences of Silver-Doping on the Crystal Structure, Morphology and Photocatalytic Activity of TiO<sub>2</sub>Nanofibers作者机构：不详
出 版 物：《Materials Sciences and Applications》 (材料科学与应用期刊（英文）)
年 卷 期：2011年第2卷第9期
页 面：1188-1193页
主 题：Titanium Oxide Nanofibers Nanostructured Ceramics Inorganic Materials Crystal Structure Electrospinning
摘 要：Doping of titanium dioxide nanofibers by silver nanoparticles revealed distinct improvement in the photocatalytic activity;however other influences have not been investigated. In this work, effect of sliver-doping on the crystal structure, the nanofibrous morphology as well as the photocatalytic activity of titanium oxide nanofibers has been studied. Silver-doped TiO2 nanofibers having different silver contents were prepared by calcination of electrospun nanofiber mats consisting of silver nitrate, titanium isopropoxide and poly(vinyl acetate) at 600℃. The results affirmed formation of silver-doped TiO2 nanofibers composed of anatase and rutile when the silver nitrate content in the original electrospun solution was more than 3 wt%. The rutile phase content was directly proportional with the AgNO3 concentration in the electrospun solution. Negative impact of the silver-doping on the nanofibrous morphology was observed as increase the silver content caused to decrease the aspect ratio, i.e. producing nanorods rather nanofibers. However, silver-doping leads to modify the surface roughness. Study of the photocatalytic degradation of methylene blue dye clarified that increase the silver content strongly enhances the dye oxidation process.
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