| 纳米TiO_2对水中腐殖酸的吸附及光催化降解 |
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| 引用本文： | 樊彩梅,孙彦平.纳米TiO_2对水中腐殖酸的吸附及光催化降解[J].应用化学,2001(11). |
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| 作者姓名： | 樊彩梅 孙彦平 |
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| 作者单位： | 太原理工大学化工学院 太原030024
(樊彩梅)，太原理工大学化工学院 太原030024(孙彦平) |
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| 基金项目： | 国家自然科学基金资助项目 ( 2 9776 0 32 )，山西省自然科学基金资助项目 ( 2 0 0 0 10 13) |
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| 摘 要： | 研究了水体中腐殖酸 ( HA)在纳米 Ti O2 颗粒上的吸附行为 ,并探讨了其吸附机理 ,还研究了 HA的Ti O2 光催化降解效果 .结果表明 ,Ti O2 对 HA的吸附作用明显依赖于水溶液的 p H,也取决于 Ti O2 的零电荷点 ;HA的光催化降解效果与其在催化剂表面的吸附行为密切相关 ,提高吸附速率 ,HA的去除率也随之提高 ;增加催化剂用量也能改善降解程度
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| 关 键 词： | 纳米TiO2 腐殖酸 吸附 光催化降解 |
Adsorption and Photocatalytic Degradation of Humic Acid Catalyzed by Nano-TiO_2 |
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| FAN Cai Mei,SUN Yan Ping.Adsorption and Photocatalytic Degradation of Humic Acid Catalyzed by Nano-TiO_2[J].Chinese Journal of Applied Chemistry,2001(11). |
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| Authors: | FAN Cai Mei SUN Yan Ping |
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| Abstract: | The adsorption behavior and photocatalytic degradation of humic acid(HA) on nano TiO 2 particles in water have been studied under UV illumination as functions of pH and the concentration of TiO 2. The results showed that the adsorption of HA on TiO 2 particles was pH dependent and pzc(point of zero charge of TiO 2) dependent due to electrostatic interaction. The adsorption behavior of HA on TiO 2 particles played a very important role in the photocatalytic process. Increasing TiO 2 concentration in a neutral medium enhanced the photodegradation. |
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| Keywords: | nano TiO 2 humic acid adsorption photocatalytic degradation |
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