| 引用本文: | 朱荣淑,喻灵敏,董文艺.Pt改性二氧化钛光催化去除溴酸盐[J].哈尔滨工业大学学报,2013,45(8):56.DOI:10.11918/j.issn.0367-6234.2013.08.008 |
| ZHU Rongshu,YU Lingmin,DONG Wenyi.Photocatalytic removal of bromate with platinum-modified titanium dioxide[J].Journal of Harbin Institute of Technology,2013,45(8):56.DOI:10.11918/j.issn.0367-6234.2013.08.008 |
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| 摘要: |
| 为提高二氧化钛光催化去除溴酸盐效率,采用浸渍法制备Pt/TiO2光催化剂,研究其在365 nm紫外光下光催化去除溴酸盐(BrO3-)活性及Pt负载量、煅烧温度、pH、溶解氧、有机物等因素对其光催化去除BrO3-活性的影响,考察其光催化去除BrO3-动力学．结果表明：PtCl4光敏化的作用显著提高了TiO2光催化去除BrO3-活性,最优Pt负载量为0.01％；Pt/TiO2最优煅烧温度为400 ℃；BrO3-去除率随pH降低而快速增加；溶解氧及有机物乙醇都抑制了Pt/TiO2光催化去除BrO3-；Pt/TiO2光催化去除BrO3-表现为一级反应动力学． |
| 关键词: 溴酸盐 光催化 铂 二氧化钛 紫外光 |
| DOI：10.11918/j.issn.0367-6234.2013.08.008 |
| 分类号: |
| 基金项目:国家科技重大专项(2008ZX07211-004-3); 国家自然科学基金青年基金资助项目(20907012). |
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| Photocatalytic removal of bromate with platinum-modified titanium dioxide |
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ZHU Rongshu, YU Lingmin, DONG Wenyi
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(Research Center of Environmental Science and Engineering, Harbin Institute of Technology Shenzhen Graduate School, 518055 Shenzhen, Guangdong, China)
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| Abstract: |
| To improve the photocatalytic efficiency of TiO2 for bromate removal, TiO2 modified with Pt was prepared by impregnation method. The photocatalytic activity of Pt/TiO2 for bromate removal was studied. The effects of Pt loading, calcination temperature, pH, dissolved oxygen, organic matter on the photocatalytic activity for bromate removal were explored under ultraviolet illumination(365 nm), and the photocatalytic kinetics was also investigated. The results showed that the photosensitization of PtCl4 significantly improved the photocatalytic activity of TiO2, and the activity of Pt/TiO2 was affected by Pt loading, calcination temperature, pH, dissolved oxygen and organic matter. An optimum content of Pt was 0.01％, the optimal calcination temperature was 400 ℃, the activity was increased quickly with a decrease of pH and inhibited by dissolved oxygen and ethanol. The photocatalytic kinetics followed the first-order kinetic equation. |
| Key words: bromate removal photo catalyst Pt titanium dioxide ultraviolet irradiation |
