| TiO2纳米纤维无纺布的制备及光催化性能研究 | |
| Fabrication and Photocatalytic Property of TiO2 Nanofibers | |
| 摘要: 以聚乙烯吡咯烷酮(PVP)作为配位剂与钛酸正丁酯(Ti(C4H9O)4)反应制得前驱体，再以乙醇为溶剂，CH3COOH作为催化剂，采用静电纺丝法制得PVP/TiO2复合纳米纤维，经550 ℃、700 ℃和900 ℃焙烧后分别得到以锐钛矿型的TiO2为主、以金红石型TiO2为主和完全金红石晶型的TiO2纳米纤维。对所制得的纳米纤维的结晶度、纯度和形貌，分别采用差热-热重分析(TG-DTA)、红外光谱(IR)、X射线粉末衍射(XRD)、扫描电镜(SEM)等进行了表征。光降解苯酚水溶液的实验结果表明，550 ℃下煅烧得到的以锐钛矿占主体的TiO2纳米纤维，2 h使浓度为50 mg·L-1苯酚水溶液的降解率超过85%，这充分说明这种TiO2电纺纳米纤维具有良好的光催化性能。 | |
| 关键词: 静电纺丝 TiO2 纳米纤维 光催化 | |
| 基金项目: | |
| Abstract: PVP/TiO2 composite nanofibers were prepared by Sol-gel processing and electrospinning technique using tetrabutyl titanate and polyvinglpyrrolidone (PVP) as starting materials. Pure TiO2 nanofibers with a diameter of 200～350 nm were obtained by high temperature calcination of the organic-inorganic composite nanofibers. The materials were characterized by X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA), infrared (IR), and scanning electron microscopy (SEM). It is observed that both the crystallinity and the morphology of the fibers depend on the calcination temperature. After calcination of PVP/TiO2 composite nanofibers at 550 ℃, anatase phase TiO2 nanofibers could be obtained. The anatase could be converted into rutile via calcination in air at 700 ℃. The process of the photocatalytic degradation of phenol by using TiO2 nanofibers as catalyst was investigated. The result shows that the TiO2 nanofibers calcined at 550 ℃ have a better photocatalytic property for phenol degradation. | |
| Keywords: electrospinning TiO2 nanofibers photocatalysis | |
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| 李从举,翟国钧,付中玉,王佩杰,常敏,李小宁.TiO2纳米纤维无纺布的制备及光催化性能研究[J].无机化学学报,2006,22(11):2061-2064. | |
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