| 溶胶-凝胶法制备不同晶相组成TiO2及其可见光催化活性 |
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| 引用本文： | 苗慧,朱连杰,赵伟,孙有光.溶胶-凝胶法制备不同晶相组成TiO2及其可见光催化活性[J].天津理工大学学报,2011,27(1):64-68. |
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| 作者姓名： | 苗慧 朱连杰 赵伟 孙有光 |
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| 作者单位： | 天津理工大学化学化工学院,天津,300384 |
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| 基金项目： | 国家自然科学基金(20871091)留学回国基金 |
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| 摘 要： | 采用溶胶-凝胶法制备了不同晶型的TiO2纳米粒子,以X-射线衍射、扫描电镜、红外光谱和紫外-可见固体漫反射吸收光谱对其进行了表征及光吸收特性研究,以可见光下TiO2对罗丹明B的降解率评价其光催化活性.结果表明TiO2纳米粒子的晶相分别为锐钛矿纯相、锐钛矿/金红石混晶和金红石纯相,粒子的平均粒径为10 nm左右,许多纳米粒子聚集形成较大的颗粒,且表面含有活性羟基.制备的三种晶相组成的TiO2对罗丹明B均具有较高的可见光催化活性,活性均高于商品TiO2(P25),且活性按锐钛矿纯相、混晶和金红石纯相的顺序依次降低,可见TiO2的可见光催化活性与其晶相组成密切相关.
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| 关 键 词： | 纳米TiO2 不同晶相 可见光催化 罗丹明B |
Preparation of TiO2 with various phase compositions by sol-gel method and their photocatalytic activities in visible light |
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| MIAO Hui,ZHU Lian-jie,ZHAO Wei,SUN You-guang.Preparation of TiO2 with various phase compositions by sol-gel method and their photocatalytic activities in visible light[J].Journal of Tianjin University of Technology,2011,27(1):64-68. |
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| Authors: | MIAO Hui ZHU Lian-jie ZHAO Wei SUN You-guang |
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| Institution: | MIAO Hui,ZHU Lian-jie,ZHAO Wei,SUN You-guang (School of Chemistry and Chemical Engineering,Tianjin University of Technology,Tianjin 300384,China) |
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| Abstract: | In the present paper TiO2 nanoparticles with various crystal phases were synthesized by sol-gel method and characterized by XRD,SEM and IR spectra,respectively.Their optical properties were investigated by UV-Vis diffuse reflection spectra and the photocatalytic activities were assessed by the photodegradation of rhodamine B in visible light.The results show that the TiO2 nanoparticles are pure anatase,anatase/rutile mixed phases and pure rutile,respectively.Their calculated average particle size is around ... |
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| Keywords: | TiO2 nanoparticles various crystalline phase photocatalysis in visible light rhodamine B |
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