Enhanced adsorption and visible-light-induced photocatalytic activity of hydroxyapatite modified Ag-TiO2 powders
Enhanced adsorption and visible-light-induced photocatalytic activity of hydroxyapatite modified Ag-TiO2 powders
复制标题
羟基磷灰石改性Ag-TiO2粉末的增强吸附和可见光诱导光催化活性
DOI：
10.1016/j.apsusc.2010.04.022
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发表时间：
2010-08-15
影响因子：
6.7
通讯作者：
Shi, J.
中科院分区：
文献类型：
--
作者：
Liu, Y.;Liu, C. Y.;Shi, J.
为了获得一种吸附性能和光催化性能均较好的材料，采用湿化学法制备了羟基磷灰石改性Ag-TiO 2粉体（Ag-TiO 2-HAP）。采用X射线衍射（XRD）、X射线光电子能谱（XPS）、紫外-可见吸收光谱（UV-vis absorption spectroscopy，UV-vis abs结果表明，该复合体系在可见光照射下具有最高的光催化活性和光化学稳定性。Ag-TiO 2-HAP杂化材料的可见光催化活性显著提高，这与其在可见光区的强吸收、低的电子-空穴对复合率和大的BET比表面积有关。(C)2010爱思唯尔有限公司版权所有。
In order to get a kind of materials with enhanced adsorption and photocatalytic performance, hydroxyapatite modified Ag-TiO2 powders (Ag-TiO2-HAP) were prepared by a facile wet chemical strategy. The powders were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis absorption spectroscopy, N-2 adsorption-desorption measurement (BET), photoluminescence spectroscopy (PL), etc. The photocatalytic activities were evaluated by photocatalytic oxidation decomposition of acetone in air under visible-light illumination. The results showed that the coupled system indicated a highest photocatalytic activity and photochemical stability under visible-light irradiation than all the other catalysts. The intensively improved visible-light-induced photocatalytic activity of the Ag-TiO2-HAP hybrids could be attributed to its strong absorption in the visible-light region, low recombination rate of the electron-hole pair and large BET specific surface area. (C) 2010 Elsevier B.V. All rights reserved.