Experimental investigation on the water stability of amino-modified indium metal–organic frameworks†
On the stability issue of MIL-68(In)–NH2 in water, water-resistance, acid-tolerance and hydrothermal tests on MIL-68(In)–NH2 were performed. The results demonstrated that MIL-68(In)–NH2 remained good structural stability in mild conditions; whereas a partial or complete hydrolysis could occur to it under harsh conditions. Furthermore, MIL-68(In)–NH2 exhibited much better water stability when compared with MIL-68(In). This study first provides a crucial reference for the applicable conditions of MIL-68(In)–NH2 applied in water treatment.