金属有机骨架材料MIL-101(Cr)在醋酸溶液中结构稳定性的研究

Structure stability of metal-organic framework MIL-101( Cr) in acetic acid solutions

金属有机骨架化合物MIL^(-1)01(Cr)作为MOFs材料的子类在众多领域皆有广泛的应用,但其在酸性条件下的稳定性还不够清楚。研究了MIL^(-1)01(Cr)在不同醋酸溶液中的结构稳定性,主要通过XRD、FTIR、SEM/EDS和氮气吸附脱附等表征手段来研究不同醋酸浓度、浸泡时间和温度对MIL^(-1)01(Cr)结构稳定性的影响。结果表明,MIL^(-1)01(Cr)在酸性溶液中具有很高的稳定性,即使在100℃的条件下浸泡在醋酸溶液中5 d仍然能保持其基本结构和结晶度。

MIL^（-1）01（ Cr）,a subclass of Metal-organic framework（ MOF） materials,has wide applications in many fields,but its structure stability under acidic conditions still remains unclear.In this paper,the structure stability of MIL^（-1）01（ Cr） in different acetic acid solutions is investigated. The influences of acetic acid concentration,soaking time and temperatures on the structure stability of MIL^（-1）01（ Cr） are studied by means of XRD,FTIR,SEM/EDS and nitrogen adsorption.The results illustrate that MIL^（-1）01（ Cr） is highly stable in acidic solution and can retain the basic structure and crystallinity even if it has been soaked in acetic acid solution at 100℃ for 5 days.