| 含铁的柱撑膨润土光催化降解甲基橙 |
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| 引用本文： | 温丽华,李益民,刘颖,李海洋. 含铁的柱撑膨润土光催化降解甲基橙[J]. 化学学报, 2005, 63(1): 55-59 |
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| 作者姓名： | 温丽华 李益民 刘颖 李海洋 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所环境光谱学实验室,合肥,230031;中国科学院研究生院,北京,100039;中国科学院安徽光学精密机械研究所环境光谱学实验室,合肥,230031;绍兴文理学院化学系,绍兴,312000;中国科学院研究生院,北京,100039;中国科学院安徽光学精密机械研究所环境光谱学实验室,合肥,230031;中国科学院大连化学物理研究所,大连,116023 |
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| 基金项目： | 国家自然科学基金(No. 20073042)，浙江省自然科学基金(No. 202018)资助项目. |
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| 摘 要： | 将两种含铁柱撑膨润土(Fe-Al-Bent和Fe-Bent)用作复相光催化剂, 表征结果证实它们具有很高的比表面积, 铁以高催化活性的α-Fe2O3存在于复相催化剂中. 以甲基橙为目标降解物, 考察了不同类型的催化剂、催化剂用量以及H2O2浓度对其降解的影响, 并与相应的均相Fenton反应进行了比较. 结果表明: 两种复相光催化剂的催化脱色性能和CODCr去除率都很高, 明显优于相应的均相Fenton反应, 且复合铁铝柱撑膨润土(Fe-Al-Bent)比单一的铁柱撑膨润土(Fe-Bent)催化性能更好, 此外它们还具有分离简单、重复使用性好等特点.
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| 关 键 词： | 柱撑粘土(PILC) 复相光催化剂 光催化降解 甲基橙 |
| 收稿时间： | 2004-02-26 |
| 修稿时间： | 2004-09-13 |
Photocatalytic Degradation of Methyl Orange by Fe-containing Pillared Bentonites |
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| WEN,Li-Huaa,d LI,Yi-Mina,c,d LIU,Yinga,d LI,Hai-Yang,a,b. Photocatalytic Degradation of Methyl Orange by Fe-containing Pillared Bentonites[J]. Acta Chimica Sinica, 2005, 63(1): 55-59 |
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| Authors: | WEN Li-Huaa d LI Yi-Mina c d LIU Yinga d LI Hai-Yang a b |
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| Affiliation: | (Laboratory of Environment Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031)(Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023)( Department of Chemistry, Shaoxing College of Arts and Sciences, Shaoxing 312000)(Graduate School of the Chinese Academy of Sciences, Beijing 100039) |
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| Abstract: | Two kinds of Fe-containing pillared bentonites were used as heterogeneous photocatalysts. Structural characteristics were examined by using XRD, BET and TEM. Results indicate that both catalysts have large surface areas and iron element is in the form of α-Fe2O3 of high catalytic activity. The photocatalytic activities of the photocatalysts were determined by the photo-assisted degradation of an organic azo dye methyl orange, and the influence of different types of catalysts, their amounts and the H2O2 concentration were also investigated. Experimental results show that two kinds of heterogeneous photocatalysts both have high catalytic activities of decoloration and CODCr removal. Degradation ratios of two photocatalysts have predominance compared with those of homogeneous Fenton reactions, respectively. The photocatalytic activity of Fe-Al-Bent is superior to that of Fe-Bent because of its larger surface area and higher acidity. In addition, our experiments also illustrate that Fe-Al-Bent can be easily recovered, regenerated and reused. |
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| Keywords: | pillared clay heterogeneous photocatalyst photocatalytic degradation methyl orange |
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