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采用浸渍法制备了一系列Fe2SO43/γAl2O3型固体超强酸样品用Mssbauer谱和XRD研究了不同温度处理对样品中铁组分的存在状态及稳定性的影响结果表明随Fe2SO43含量的变化铁组分可以在γAl2O3表面以单层分散和无定形形式存在当温度≥600℃时无定形状态的Fe2SO43又生成晶态的Fe2SO43而形成的晶态Fe2SO43即使在700℃时也不分解。
A series of Fe2SO43 / γAl2O3 solid superacid samples were prepared by impregnation method. The effects of different temperature treatments on the existence and stability of Fe components in the samples were investigated by Mssbauer spectroscopy and XRD. The results show that with the Fe2SO43 content, The surface of γAl2O3 exists as a monolayer dispersed and amorphous form. The crystalline Fe2SO43, which is formed when Fe2SO43 is in the amorphous state at a temperature of ≥600 ℃ and then reacts with the crystalline Fe2SO43, does not decompose even at 700 ℃.