| 固体(NH_4)_2SO_4-TiO_2体系的IR研究 |
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| 引用本文： | 魏长平,陈敬峰,柳翱,李荣生.固体(NH_4)_2SO_4-TiO_2体系的IR研究[J].长春理工大学学报,1994(3). |
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| 作者姓名： | 魏长平 陈敬峰 柳翱 李荣生 |
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| 作者单位： | 吉林工学院轻纺系(魏长平，陈敬峰)，吉林大学化学系(柳翱，李荣生) |
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| 摘 要： | 本文用真空红外光谱（IR）、吡啶吸附红外光谱技术对不同温度下用浸渍法制得的（NH4）2SO4一TiO2样品进行了研究。将研究结果与其催化性能作了关联。研究结果显示，热处理时存在着（NH4）2SO4在TiO2表面上自发分散过程。同时在表面形成了与酸性有关的S-Ti配合物。随着处理温度的升高，表面S-Ti配合物的含量逐步增大，表面酸性也不断增加，到573K时表面S—Ti配合物的含量达到最大值，表面酸性也最强，此时化反应活性最大。超过573K时，随着处理温度升高，表面S-Ti配合物分解，表面酸性减弱，此时催化反应活性也相应地降低。
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| 关 键 词： | 硫助金属氧化物 表面配合物 酸性 催化活性 |
IR Research of Solid (NH_4)_2SO_4-TiO_2 Systems |
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| Wei Changping, Chen Jinfen, Liu Ao ,Li Rongsheng.IR Research of Solid (NH_4)_2SO_4-TiO_2 Systems[J].Journal of Changchun University of Science and Technology,1994(3). |
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| Authors: | Wei Changping Chen Jinfen Liu Ao Li Rongsheng |
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| Affiliation: | Wei Changping; Chen Jinfen; Liu Ao ;Li Rongsheng |
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| Abstract: | Ammonium sulfate-litanium oxide was ptreated at different temperatunes. The obtainedsamples were characterized by infra-red (IR). The results show that wen ammonium sulfate-titaniumokide was treatedbelow 573K, the spontuneous dispersion of ammonium sulfate happes, which was ac-companied by the partial decomposition of ammonium sulfate. During and after the dispersion the iso-lated sulfate anion interacts with Tion the surfact of TiO2, which is transformed into the bidentcteoybound sulfate, thus forming the surface s-Ti comples.Aboue 573K the surfact S-Ti comples will gradu-ally decompose with the furthes increase of the treat ment temperature. |
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| Keywords: | Sulfote promoted metal oxides Surface comples acidic properties Catalytic properties |
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