【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。更多还原

【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.更多还原