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首页> 外文期刊>Bulletin of the Korean Chemical Society >Effect of V2O5 Modification in V2O5/TiO2-ZrO2 Catalysts on Their Surface Properties and Catalytic Activities for Acid Catalysis
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Effect of V2O5 Modification in V2O5/TiO2-ZrO2 Catalysts on Their Surface Properties and Catalytic Activities for Acid Catalysis

机译：V2O5 / TiO2-ZrO2催化剂中V2O5改性对其表面性质和酸催化活性的影响

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摘要

V2O5/TiO2-ZrO2 catalyst modified with V2O5 was prepared by adding Ti(OH)4-Zr(OH)4 powder into an aqueous solution of ammonium metavanadate followed by drying and calcining at high temperatures.The characterization of prepared catalysts was performed using XRD,DSC,solid-state ~(51)V NMR,and FTTR.In the case of calcination temperature of 500 °C,for the catalysts containing low loading V2O5 below 25 wt % vanadium oxide was in a highly dispersed state,while for catalysts containing high loading V2O5 equal to or above 25 wt % vanadium oxide was well crystallized due to the V2O5 loading exceeding the formation of monolayer on the surface of TiO2-ZrO2.The strong acid sites were formed through the bonding between dispersed V2O5 and TiO2-ZrO2.The larger the dispersed V2O5 amount,the higher both the acidity and catalytic activities for acid catalysis.
机译：将Ti（OH）4-Zr（OH）4粉末加入偏钒酸铵水溶液中，然后在高温下干燥和煅烧，制得V2O5改性的V2O5 / TiO2-ZrO2催化剂。 ，DSC，固态〜（51）V NMR和FTTR。在煅烧温度为500°C的情况下，对于低载量V2O5的催化剂，低于25 wt％的氧化钒处于高度分散状态，而对于催化剂由于V2O5的负载量超过了TiO2-ZrO2表面上的单层形成，因此含有高含量V2O5等于或大于25 wt％的氧化钒的晶体很好地结晶。通过分散的V2O5和TiO2-ZrO2之间的键合形成强酸位V2O5的分散量越大，酸度和酸催化活性都越高。

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