| 二氧化钛包裹碘单质(I_2/TiO_2)制备及其光催化降解苯酚 |
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| 引用本文： | 邓培昌,王海增,樊丽霞,孙宝维.二氧化钛包裹碘单质(I_2/TiO_2)制备及其光催化降解苯酚[J].感光科学与光化学,2009(3). |
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| 作者姓名： | 邓培昌 王海增 樊丽霞 孙宝维 |
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| 作者单位： | 中国海洋大学化学化工学院; |
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| 基金项目： | 国家自然科学基金(20477041) |
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| 摘 要： | 采用水热法,以Ti(SO4)2为钛源,KIO3为掺碘剂制备了具有高可见光活性,高稳定性的二氧化钛包裹碘单质(I2/TiO2)光催化剂.利用X射线光电子能谱(XPS)、X射线晶体粉末衍射(XRD)、透射电子显微镜(TEM)和紫外可见漫反射光谱(DRS)等表征手段对样品进行表征.结果表明,I2/TiO2中除含有锐钛矿相二氧化钛外、还含有碘单质和碘酸;I2/TiO2粒径大小为45 nm左右;在波长384 nm至700 nm范围内,该催化剂有强烈的吸收.探讨了该催化剂的形成过程和可见光催化机理.以苯酚降解反应为探针,测定了I2/TiO2光催化活性.结果显示:在全谱光源照射下I2/TiO2活性略高于P25,在可见光范围内其活性是P25的3倍多.确定了降解苯酚的最佳条件:全谱光源照射,投加量为0.5 g/L,苯酚浓度大于10 mg/L,溶液pH为3.2.I2/TiO2重复使用4次后,催化活性没有明显下降.
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| 关 键 词： | TiO2 碘掺杂 光催化 苯酚降解 |
Preparation of(I_2)_n Encapsulation Inside TiO_2 and Photocatalytic Degradation of Phenol |
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| DENG Pei-chang,WANG Hai-zeng,FAN Li-xia,SUN Bao-wei.Preparation of(I_2)_n Encapsulation Inside TiO_2 and Photocatalytic Degradation of Phenol[J].Photographic Science and Photochemistry,2009(3). |
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| Authors: | DENG Pei-chang WANG Hai-zeng FAN Li-xia SUN Bao-wei |
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| Affiliation: | College of Chemistry and Chemical Engineering;Ocean University of China;Qingdao 266003;Shangdong;P.R.China |
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| Abstract: | A simple method for preparing highly visible-light photocatalytic activity and stability nanocrystalline(I2)n encapsulation inside TiO2(I2/TiO2) powders was developed by a mild hydrothermal route.The as-prepared TiO2 powders were characterized by X-ray diffraction(XRD),UV-vis diffuse reflectance spectra(DRS) and transmission electron microscopy (TEM).XRD and TEM measurement revealed that HIO3 and I2 existed in I2/TiO2,the size of I2/TiO2 was about 45.0 nm.I2/TiO2 exhibited obvious a strong absorption in the... |
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| Keywords: | TiO2 iodine doped photocatalytic degradation of phenol |
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