| 张文治,李莉.CTAB作用下纳米复合材料ZnO-TiO2制备与多模式光催化降解罗丹明B[J].分子催化,2013,(5):474-482 |
| CTAB作用下纳米复合材料ZnO-TiO2制备与多模式光催化降解罗丹明B |
| The Preparation of Nanocomposite ZnO-TiO2 by CTAB-assisted and Photocatalytic Degradation Rhodamine B with Multiple Modes |
| 投稿时间：2013-07-22 修订日期：2013-10-07 |
| DOI： |
| 中文关键词: 溶胶-凝胶 程序升温溶剂热 CTAB ZnO-TiO2 光催化 染料 |
| 英文关键词:Sol-gel Temperature programmed hydrothermal treatment CTAB ZnO-TiO2 Photocatalysis Dye |
| 基金项目:国家自然科学基金资助项目(No.21376126) |
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| 中文摘要: |
| 在模板剂十六烷基三甲基溴化铵作用下，通过溶胶-凝胶与程序升温溶剂热法制备了纳米复合材料ZnO-TiO2(CTAB)。经X-射线衍射(XRD)、紫外-可见漫反射吸收光谱(UV-Vis/DRS)、X射线光电子能谱(XPS)、扫描电子显微镜(SEM)和N2吸附-脱附测试等手段对其组成、结构和形貌等进行了表征。结果显示，合成产物ZnO-TiO2(CTAB)主要晶型为ZnO纤锌矿，并部分生成ZnTiO3。同时，该合成产物经CTAB作用后，其对光的吸收发生明显红移，且平均孔径明显变小，BET值增大。在紫外光、可见光、模拟日光和微波辅助等不同模式光催化降解罗丹明B的实验研究中，与未经CTAB 作用的样品ZnO-TiO2相比，ZnO-TiO2(CTAB)具有更高的光催化性能。同时，该复合材料在紫外光条件下，对甲基橙、罗丹明B、结晶紫、亚甲基蓝和龙胆紫五种不同结构染料的光催化中均表现出良好的降解效果。 |
| 英文摘要: |
| The nano-composite ZnO-TiO2 under cetyltrimethyl ammonium bromide(CTAB) was prepared by the sol-gel method combined with temperature-programmed hydrothermal treatment. The phase composition, structure and morphology of the nano-composite ZnO-TiO2(CTAB) were well-characterized by X-ray diffraction(XRD), diffuse reflectance(UV-Vis/DRS), X-ray photoelectron spectroscopy(XPS), Scanning electron microscopy(SEM), Transmission electron microscopy(TEM) and N2 adsorption-desorption measurement. Results showed that the synthesized product ZnO-TiO2(CTAB) had mainly the ZnO wurtzite and part ZnTiO3 were generated. Meanwhile, the absorption band of as-product ZnO-TiO2(CTAB) was obviously red shifted with CTAB effect, and the average pore size of ZnO-TiO2(CTAB) was obviously reduced, moreover, of which the BET was increased. Compared with ZnO-TiO2, the nano-composite ZnO-TiO2(CTAB) without CTAB has better photocatalytic properties in the different modes including ultraviolet, visible light, simulated sunlight and microwave-assisted photocatalytic degradation of Rhodamine B. In addition, the nano-composite ZnO-TiO2(CTAB) showed good degradation for five different structure dyes including methyl orange, Rhodamine B, Crystal violet, Gentian violet and Methylene blue under UV light irradiation. |
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