| 固体超强酸SO2— 4／TiO2制备及其光催化氧化性能 |
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| 引用本文： | 杜金菊,徐安武,祝静艳. 固体超强酸SO2— 4／TiO2制备及其光催化氧化性能[J]. 中山大学学报(自然科学版), 2001, 40(3): 48-51 |
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| 作者姓名： | 杜金菊 徐安武 祝静艳 |
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| 作者单位： | 1. 中山大学测试中心,
2. 中山大学化学与化学工程学院, |
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| 基金项目： | 国家自然科学基金资助项目（29973059） |
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| 摘 要： | 采用沉淀－浸渍法制备固体超强酸催化剂SO2－ 4／TiO2纳米粒子，并用XRD，BET，XPS，UV－Uis漫反射光谱等对其特性进行表征，NO-2以为降解目标物，考察了SO2－ 4／TiO2光催化氧化性能，结果表明，SO2－ 4／TiO2在高温下相结构稳定，TiO2的超强酸化可增大表面，有利于反应物吸附，同时产生吸附带边蓝移及禁带宽度增加，从而，产生较大的氧化还原势，与TiO2相比，光催化氧化活性显著提高，焙烧温度600度时催化剂活性最好。
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| 关 键 词： | 固体超强酸 SO2－4／TiO2 光催化氧化 NO－2 污染治理 制备 |
| 文章编号： | 0529-6579(2001)03-0048-04 |
| 修稿时间： | 2000-10-16 |
Preparation of SolidSuperacid SO2-4/TiO2 and Evaluation of TheirPhotocatalytic Oxidation Activity |
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| DU Jin-ju,XU An-wu,ZHU Jing-yan. Preparation of SolidSuperacid SO2-4/TiO2 and Evaluation of TheirPhotocatalytic Oxidation Activity[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2001, 40(3): 48-51 |
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| Authors: | DU Jin-ju XU An-wu ZHU Jing-yan |
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| Abstract: | Solid superacid SO2-4/TiO2 catalysts were prepared by the precipitation and wet impregnation, and characterized by XRD, BET, XPS, and UV-Vis diffuse reflection spectra. Their photocatalytic activities were evaluated by the degradation of nitrite. The results indicated that the photocatalytic activity and structural properties of TiO2 were greatly improved by sulfation. The sulfated TiO2 (SO2-4/TiO2) possessed higher specific surface area, and the band gap of them increased and the band edge blue-shifted,thus yielding a larger redox potential and leading to the enhanced photocatalytic oxidation activity. The sample calcined at 600 ℃ showed the most effective for the photocatalytic oxidation of nitrite. |
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