| 钙钛矿型复合氧化物LaFeO3和LaCoO3的光催化活性 |
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| 引用本文： | 杨秋华,傅希贤,王俊珍,孙艺环,曾淑兰.钙钛矿型复合氧化物LaFeO3和LaCoO3的光催化活性[J].催化学报,1999,20(5):521-524. |
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| 作者姓名： | 杨秋华 傅希贤 王俊珍 孙艺环 曾淑兰 |
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| 作者单位： | 天津大学化学系,天津,300072 |
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| 基金项目： | 国家自然科学基金;59772019; |
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| 摘 要： | 采用柠檬酸法合成了钙钛矿复合氧化物ＬａＦｅＯ３和ＬａＣｏＯ３，并以其为光催化剂对水溶性染料进行光催化降解实验，研究了不同光源和不同光照时间对降解脱色率的影响。结果表明ＬａＦｅＯ３和ＬａＣｏＯ３均有较强的光催化活性，而ＬａＣｏＯ３的光催化活性明显高于ＬａＦｅＯ３，这主要与Ｆｅ＾３＋和Ｃｏ＾３＋离子的电子构型以及Ｆｅ－Ｏ间和Ｃｏ－Ｏ间的结合能有关。
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| 关 键 词： | 钙钛矿 氧化物 光催化 |
| 收稿时间： | 1999-10-25 |
THE PHOTOCATALYTIC ACTIVITY OF PEROVSKITE TYPE OXIDES LaFeO3 AND LaCoO3 |
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| Yang Qiuhua,Fu Xixian,Wang Junzhen,Sun Yihuan,Zeng Shulan.THE PHOTOCATALYTIC ACTIVITY OF PEROVSKITE TYPE OXIDES LaFeO3 AND LaCoO3[J].Chinese Journal of Catalysis,1999,20(5):521-524. |
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| Authors: | Yang Qiuhua Fu Xixian Wang Junzhen Sun Yihuan Zeng Shulan |
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| Abstract: | Perovskite type oxides LaFeO 3 and LaCoO 3 are prepared by citric acid complex method and utilized as photocatalysts for the photocatalytic degradation and decolorization of several water soluble dyes. The influence of different light sources and irradiation time on the efficiency of decolorization is studied. The results show that LaFeO 3 and LaCoO 3 possess photocatalytic activity, but the catalytic activity of LaCoO 3 is higher than that of LaFeO 3, which is related with the binding energy of transition metal and oxygen, as well as electronic configuration of transition metal ions. The photoacoustic spectra of LaCoO 3 and LaFeO 3 are also studied. It is found that LaCoO 3 has absorption peaks at wavelength longer than LaFeO 3, therefore the activity of LaCoO 3 is higher than that of LaFeO 3. |
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| Keywords: | LaFeO3 LaCoO3 |
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