| 纳米TiO_2/SiO_2的制备与表征及其光催化活性的研究 |
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| 引用本文： | 刘波,王樱花,魏丽乔.纳米TiO_2/SiO_2的制备与表征及其光催化活性的研究[J].材料工程,2009(Z2). |
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| 作者姓名： | 刘波 王樱花 魏丽乔 |
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| 作者单位： | 太原理工大学材料科学与工程学院;新材料界面科学与工程教育部重点实验室(太原理工大学); |
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| 摘 要： | 针对二氧化钛(TiO2)纳米颗粒极易团聚、分散性差的问题,以提高TiO2分散稳定性与光催化活性为目的,采用并流中和法,以锐钛矿型纳米TiO2粉体为载体,硅酸钠(Na2SiO3)为包覆剂,使用硫酸(H2SO4)调节pH值,在纳米TiO2表面包覆致密的氧化硅(SiO2)膜。借助Fourier变换红外光谱(FTIR),X射线能量散射谱(EDS)和场发射扫描电子显微镜(FESEM)表征样品的键合情况、表面化学成分、分散性,同时借助紫外-可见分光光度计(UV-Vis Spectrophotometer)以亚甲基蓝的光催化降解反应对其光催化活性进行评价。FTIR和EDS结果表明:采用该包覆法后,SiO2以化学键合的方式沉积在纳米TiO2表面,在包覆层和纳米TiO2颗粒之间的界面上形成了Ti—O—Si键。SEM结果表明:TiO2/SiO2纳米复合粒子分散均匀,无严重团聚和大块堆积现象。光催化实验结果表明:以SiO2表面包覆后的TiO2颗粒光催化活性明显高于纯TiO2。
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| 关 键 词： | 二氧化钛 表面包覆 改性 二氧化硅 光催化活性 |
Preparation and Characterization of TiO_2/SiO_2 Nano-particles and Research on Their Photocatalytic Activity |
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| LIU Bo,WANG Ying-hua,WEI Li-qiao,Ministry of Education,China.Preparation and Characterization of TiO_2/SiO_2 Nano-particles and Research on Their Photocatalytic Activity[J].Journal of Materials Engineering,2009(Z2). |
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| Authors: | LIU Bo WANG Ying-hua WEI Li-qiao Ministry of Education China |
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| Affiliation: | LIU Bo1,2,WANG Ying-hua1,WEI Li-qiao1,2(1 College of Materials Science , Engineering,Taiyuan University of Technology,Taiyuan 030024,China,2 Key Laboratory of Interface Science , Engineering in Advanced Materials(Taiyuan University of Technology),Ministry of Education,China) |
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| Abstract: | In order to enhance the dispersion stability,reduce the agglomeration of titania(TiO2)nano-particles and improve the photocatalytic activity,a compact silica film was successfully coated onto the surface of anatase TiO2 nano-particles by the simultaneous neutralization method,using sodium silicate as the coating agent and sulfuric acid as the neutralization agent.The surface bonding mode,the chemical components and the dispersibility of the samples were characterized by FTIR,EDS and FESEM.Their photocatalyt... |
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| Keywords: | TiO2 surface coating property modification SiO2 photocatalytic activity |
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