摘要
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 Fe2(SO4)3/γ-Al2O3 solid superacid samples have been pr epared by wet impregnation method.Mssbauer spectroscopy and X-ray diffraction(XRD)were employed to study the effects of the calcination temperature on the s tates and stabilization of iron species in Fe2(SO4)3/γ-Al2O3.The results showed that the iron species could exist as monolayer and amorphous states at the calcination temperature lower than 500℃,but the amorphous Fe2(SO4)3transformed to crystalline Fe2(SO4)3 as the temperature increased to 600℃.T he formed crystalline Fe2(SO4)3could be stable even if the calcination temperature was up to 700℃.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2001年第6期859-864,共6页
Chinese Journal of Inorganic Chemistry
基金
国家博士点专项基金资助项目(No.98028434)
