Preparation and enhanced photocatalytic activity of Ag@TiO2 core-shell nanocomposite nanowires
Preparation and enhanced photocatalytic activity of Ag@TiO2 core-shell nanocomposite nanowires
复制标题
Ag@TiO2核壳纳米复合纳米线的制备及其增强光催化活性
DOI：
10.1016/j.jhazmat.2010.01.013
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发表时间：
2010-05-15
影响因子：
13.6
通讯作者：
Yu, Jiaguo
中科院分区：
文献类型：
--
作者：
Cheng, Bei;Le, Yao;Yu, Jiaguo
以银纳米线为模板，钛酸四丁酯(TBOT)为前驱体，采用气相热法在150℃下反应10h制备了Ag@TiO2核-壳纳米复合纳米线，并用X射线衍射仪、扫描电子显微镜、透射电子显微镜和氮气吸附-脱附等温线对其进行了表征。在紫外光照射下，通过室温下对罗丹明B(RhB)水溶液的光催化脱色来评价所制备的样品的光催化活性。结果表明，Ag@TiO2核壳纳米线对RhB水溶液的降解表现出高效、可回收的光催化活性。此外，与分散的纳米粒子相比，银@二氧化钛纳米线可以很容易地通过光催化反应后的自然沉降从处理溶液中分离出来。(C)2010爱思唯尔B.V.保留所有权利。
Ag@TiO2 core-shell nanocomposite nanowires were synthesized via a vapor-thermal method using Ag nanowires as templates and tetrabutyl titanate (TBOT) as precursors at 150 degrees C for 10 h. The as-prepared samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy and nitrogen adsorption-desorption isotherms. The photocatalytic activity of the as-prepared samples was evaluated by photocatalytic decolorization of Rhodamine B (RhB) aqueous solution at ambient temperature under UV-light irradiation. The results show that the Ag@TiO2 core-shell nanowires exhibit highly efficient and recyclable photocatalytic activity for the degradation of RhB aqueous solution. Moreover, in contrast to the discrete nanoparticles, the Ag@TiO2 nanowires can be readily separated from the treated solution by natural settlement after photocatalytic reaction. (C) 2010 Elsevier B.V. All rights reserved.