| SO2-4/TiO2固体酸的红外和拉曼光谱研究 |
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| 引用本文： | 苏文悦,付贤智,魏可镁.SO2-4/TiO2固体酸的红外和拉曼光谱研究[J].光谱学与光谱分析,2000,20(6):840-841. |
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| 作者姓名： | 苏文悦 付贤智 魏可镁 |
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| 作者单位： | 福州大学光催化研究所,福州 |
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| 摘 要： | 用ＩＲ、Ｒａｍａｎ光谱研究了ＳＯ＾２－４／ＴｉＯ２固体酸在不同烧温度下的结构、晶相转变和表面酸中心。结果表明，ＳＯ＾２－４与ＴｉＯ２表面的结合为螯合式双配结构。当烧结温度小于５００℃时，ＳＯ＾２－４／ＴｉＯ２样品具有较高的结构稳定性，晶相结构以锐钛矿为主，表面Ｂ酸位数目约是Ｌ酸位数目的２倍，当烧结温度大于５００℃时，随着烧结晶度的升高，表面结合的ＳＯ＾２－４逐渐流失，晶相从锐钛矿转变为金红石，表面Ｂ酸位减少并消失。
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| 关 键 词： | SO^2－4／TiO2固体酸 结构 催化剂 红外光谱 |
Raman and Infrared Spectroscopic Investigation of SO2-4/TiO2 Solid Acids |
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| W Su,X Fu,K Wei.Raman and Infrared Spectroscopic Investigation of SO2-4/TiO2 Solid Acids[J].Spectroscopy and Spectral Analysis,2000,20(6):840-841. |
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| Authors: | W Su X Fu K Wei |
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| Institution: | Research Institute of Photocatalysis, Fuzhou University, 350002 Fuzhou. |
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| Abstract: | The structure, crystal phase transition and surface acid centers of SO4(2-)/TiO2 solid acids calcined at different temperatures were studied by IR and Raman spectroscopy. The results showed that SO4(2-) is combined with metal ions of TiO2 in a chelating bidentate mode. When the calcination temperature is below 500 degrees C, the samples possess stable structure with anatase as the main crystal phase, and there are two types of acid sites (Lewis and Bronsted acid) on the samples, the amount of B acid is about twice as that of L acid. When the temperature is above 500 degrees C, surface SO4(2-) desorb gradually with increasing calcination temperature, leading to crystal phase transition from anatase to rutile and the surface B acid sites fade away. |
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