| Ag-TiO_2/KIT-6复合纳米光催化剂的研究 |
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| 引用本文： | 张凤利,郑远辉,詹瑛瑛,林性贻,张汉辉,郑起.Ag-TiO_2/KIT-6复合纳米光催化剂的研究[J].光谱学与光谱分析,2009,29(8):2166-2170. |
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| 作者姓名： | 张凤利 郑远辉 詹瑛瑛 林性贻 张汉辉 郑起 |
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| 作者单位： | 1. 福州大学化肥催化剂国家工程研究中心,福建,福州,350002
2. 福州大学化学系,福建,福州,350002 |
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| 基金项目： | 国家自然科学基金，福建省重大专项项目 |
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| 摘 要： | 以有序介孔SiO2(简称KIT-6)为载体,采用钛酸丁酯水解法将纳米TiO2与KIT-6复合,并通过沉积沉淀法将纳米Ag粒子负载于其上,首次制得Ag-TiO2/KIT-6复合光催化剂,并采用相同的方法制备了一系列相关的催化剂.以光催化降解甲基橙来评价其催化性能,光催化活性顺序为Ag-TiO2/KIT-6＞Ag/TiO2＞TiO2/KIT-6＞TiO2＞Ag/KIT-6.利用XRD、N2物理吸附、XPS、UV-Vis DRS和TEM对系列催化剂进行表征,结果表明Ag-TiO2之间形成的异质结和催化剂的大比表面积是Ag-TiO2/KIT-6具有最高光催化活性的重要原因.其中Ag-TiO2之间的异质结结构,有效抑制了光生电子和光生空穴在TiO2表面和体相内部的复合,提高了光催化活性;此外Ag-TiO2/KIT-6的大比表面积大大提高了催化剂的吸附能力,增加了催化剂与污染物的接触,达到快速光催化降解污染物的目的.
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| 关 键 词： | 异质结 Ag-TiO2/KIT-6催化剂 |
| 收稿时间： | 2008/8/22 |
Studies on Ag-TiO_2/KIT-6 Composite Nanosized Photocatalyst |
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| ZHANG Feng-li,ZHENG Yuan-hui,ZHAN Ying-ying,LIN Xing-yi,ZHANG Han-hui,ZHENG Qi.Studies on Ag-TiO_2/KIT-6 Composite Nanosized Photocatalyst[J].Spectroscopy and Spectral Analysis,2009,29(8):2166-2170. |
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| Authors: | ZHANG Feng-li ZHENG Yuan-hui ZHAN Ying-ying LIN Xing-yi ZHANG Han-hui ZHENG Qi |
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| Institution: | ZHANG Feng-li1,ZHENG Yuan-hui1,ZHAN Ying-ying1,LIN Xing-yi1,ZHANG Han-hui2,ZHENG Qi11. National Engineering Research Center of Chemical Fertilizer Catalyst,Fuzhou University,Fuzhou 350002,China2. Department of Chemistry,China |
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| Abstract: | In the present paper,ordered mesoporous silica (KIT-6) as support,nanosized TiO2 into KIT-6 was synthesized by titanium tetraisopropoxide hydrolysis. Then silver was loaded by deposition-precipitation method. Ag-TiO2/KIT-6 composite nanosized photocatalyst was firstly synthesized and a series of correlated catalysts were synthesized by the same preparation method. Methyl orange is presently adopted as a representative organic pollutant to evaluate the photocatalytic performance of the as-synthesized catalys... |
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| Keywords: | XPS UV-Vis DRS |
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