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合成了6种不同钒含量的Dawson结构磷钨钒杂多酸,并通过红外光谱、紫外光谱进行了表征。红外光谱表明所合成的杂多化合物在700～1100 cm-1处有4个特征振动峰,紫外光谱在200和270 nm左右存在2个特征吸收峰,它们均为Dawson结构的杂多化合物。以苯并噻吩(DBT)为模型化合物,在不同反应条件下进行氧化脱硫反应,并对其中活性高的杂多化合物进行了水滑石柱撑,氧化脱硫结果表明,H12[P2W12V6O62]显示出最佳的催化性能。
Dawson structure phosphogovanadium heteropoly acid with six different vanadium contents was synthesized and characterized by FTIR and UV spectroscopy. The infrared spectra showed that the synthesized heteropoly compounds had four characteristic vibration peaks at 700-1100 cm-1 and two characteristic absorption peaks at about 200 and 270 nm, all of which were Dawson-type heteropoly compounds. Oxidative desulfurization reaction was carried out with benzothiophene (DBT) as the model compound and hydrotalcite was carried out on the heteropoly compounds with high activity. The results of oxidative desulfurization showed that H12 [P2W12V6O62] showed the best performance The catalytic performance.