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可见光响应的碘掺杂TiO2光催化剂的制备及其作用机理

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宋爽, 洪甜蜜, 方慧莹, 何志桥, 陈建孟. 可见光响应的碘掺杂TiO2光催化剂的制备及其作用机理[J]. 环境工程学报, 2013, 7(1): 1-6.
引用本文: 宋爽, 洪甜蜜, 方慧莹, 何志桥, 陈建孟. 可见光响应的碘掺杂TiO2光催化剂的制备及其作用机理[J]. 环境工程学报, 2013, 7(1): 1-6.
shu
Song Shuang, Hong Tianmi, Fang Huiying, He Zhiqiao, Chen Jianmeng. Preparation and photocatalytic mechanism of visible-light-driven iodine doped titanium dioxide photocatalyst[J]. Chinese Journal of Environmental Engineering, 2013, 7(1): 1-6.
Citation: Song Shuang, Hong Tianmi, Fang Huiying, He Zhiqiao, Chen Jianmeng. Preparation and photocatalytic mechanism of visible-light-driven iodine doped titanium dioxide photocatalyst[J]. Chinese Journal of Environmental Engineering, 2013, 7(1): 1-6.
shu

可见光响应的碘掺杂TiO2光催化剂的制备及其作用机理

  • 1.

    浙江工业大学生物与环境工程学院,杭州 310032

  • 基金项目:

    国家自然科学基金资助项目(21076196)

    国家"973"重点基础研究发展规划项目(2009CB421603)

    浙江省自然科学基金重点项目(Z5080207)

  • 中图分类号: O643

Preparation and photocatalytic mechanism of visible-light-driven iodine doped titanium dioxide photocatalyst

  • 1.

    College of Biological & Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China

  • Fund Project:

  • 摘要: 以钛酸四丁酯为前驱物制备了碘掺杂TiO2催化剂(I-TiO2),考察了碘掺杂量、水解水量、水解温度和煅烧温度对催化剂物理化学性质与光催化活性的影响。X射线衍射(XRD)结果显示,I-TiO2由锐钛矿相和金红石相组成。在可见光照射下,通过降解水溶液中的苯酚评价了I-TiO2催化剂的光催化性能。结果表明,在水解温度为20℃,水解水量为300 mL,煅烧温度为400℃,碘钛比(摩尔比)为20%的制备条件下,催化剂显示了最优的光催化活性。通过向反应体系中引入自由基捕获剂及降低溶解氧,证实光催化降解苯酚主要由光生空穴或吸附的羟基自由基引发。
    Abstract: Iodine-doped titania (I-TiO2) catalyst was prepared using tetrabutyl titanate as precursor. The physicochemical properties and the photocatalytic activity of the products were investigated by varying doping content of iodine, water amount of hydrolysis, hydrolysis temperature and calcination temperature. X-ray diffraction (XRD) results showed that the I-TiO2 catalysts were composed of anatase and rutile phase. The photocatalytic ability of the I-TiO2 was evaluated in terms of phenol degradation in an aqueous solution under visible light irradiation. Under the conditions of a hydrolysis temperature of 20℃, water volume of hydrolysis of 300 mL, calcination temperature of 400℃, molar ratio of iodine to tiannium of 20%, the I-TiO2 catalysts exhibited the highest catalytic efficiency. With the aid of the introduction of various free radicals scavengers and the decrease of dissolved oxygen, it is speculated that the photocatalytic degradation of phenol is primarily initiated by valence band hole and/or adsorptive hydroxyl radicals.
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  • 收稿日期:  2012-04-01
  • 刊出日期:  2013-01-16
宋爽, 洪甜蜜, 方慧莹, 何志桥, 陈建孟. 可见光响应的碘掺杂TiO2光催化剂的制备及其作用机理[J]. 环境工程学报, 2013, 7(1): 1-6.
引用本文: 宋爽, 洪甜蜜, 方慧莹, 何志桥, 陈建孟. 可见光响应的碘掺杂TiO2光催化剂的制备及其作用机理[J]. 环境工程学报, 2013, 7(1): 1-6.
shu
Song Shuang, Hong Tianmi, Fang Huiying, He Zhiqiao, Chen Jianmeng. Preparation and photocatalytic mechanism of visible-light-driven iodine doped titanium dioxide photocatalyst[J]. Chinese Journal of Environmental Engineering, 2013, 7(1): 1-6.
Citation: Song Shuang, Hong Tianmi, Fang Huiying, He Zhiqiao, Chen Jianmeng. Preparation and photocatalytic mechanism of visible-light-driven iodine doped titanium dioxide photocatalyst[J]. Chinese Journal of Environmental Engineering, 2013, 7(1): 1-6.
shu

可见光响应的碘掺杂TiO2光催化剂的制备及其作用机理

  • 1. 浙江工业大学生物与环境工程学院,杭州 310032
  • 收稿日期:  2012-04-01
基金项目:

国家自然科学基金资助项目(21076196)

国家"973"重点基础研究发展规划项目(2009CB421603)

浙江省自然科学基金重点项目(Z5080207)

摘要: 以钛酸四丁酯为前驱物制备了碘掺杂TiO2催化剂(I-TiO2),考察了碘掺杂量、水解水量、水解温度和煅烧温度对催化剂物理化学性质与光催化活性的影响。X射线衍射(XRD)结果显示,I-TiO2由锐钛矿相和金红石相组成。在可见光照射下,通过降解水溶液中的苯酚评价了I-TiO2催化剂的光催化性能。结果表明,在水解温度为20℃,水解水量为300 mL,煅烧温度为400℃,碘钛比(摩尔比)为20%的制备条件下,催化剂显示了最优的光催化活性。通过向反应体系中引入自由基捕获剂及降低溶解氧,证实光催化降解苯酚主要由光生空穴或吸附的羟基自由基引发。

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