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采用溶液混合法和浸渍法制备了一系列 V2 O5- Sn O2 二元氧化物和 V2 O5- Sn O2 / η- Al2 O3 负载型催化剂 .V2 O5与 Sn O2 构成的二元氧化物样品与单氧化物及其 V2 O5- Sn O2 / η- Al2 O3 的性质不同 .负载型催化剂的活性明显高于二元氧化物样品的活性 ,甲苯转化率和苯甲醛选择性与催化剂的组成有较好的对应关系 .随着 Sn O2 的引入 ,催化剂活性缓慢降低 ,苯甲醛的选择性逐渐减小 ,可见 Sn O2 不适合作为甲苯氧化反应的催化剂组分 .X射线衍射实验结果表明 ,Sn O2 的作用主要是为钒的分散提供骨架 .
A series of V2 O5-Sn O2 binary oxides and V2 O5-Sn O2 / η-Al2 O3 supported catalysts were prepared by solution mixing and impregnation method. The binary oxide samples composed of V2O5 and Sn O2 were monolayer And their properties of V2 O5-Sn O2 / η-Al2 O3 are different.The activity of the supported catalyst is obviously higher than that of the binary oxide sample, the conversion of toluene and selectivity of benzaldehyde have a good correspondence with the composition of the catalyst With the introduction of SnO 2, the activity of the catalyst slowed down and the selectivity of benzaldehyde gradually decreased, showing that SnO 2 was not suitable as a catalyst component for the toluene oxidation reaction.XRD results showed that the main effect of SnO 2 was Provide a framework for the dispersion of vanadium.