“…Wang et al prepared a bimetallic MIL-127 (Fe2M, M = Fe, Ni, Co, Zn) 3D PC gas sensor by simple evaporation-induced self-assembly for the detection of chlorinated hydrocarbons. 100 The bimetallic MIL-127 with redox-active open metal sites and mixed metal nodes generated peculiar surface properties and synergetic effects due to the doped Co element, which enhances the adsorption performance. From the adsorption site, the ionic properties of Co–O bonds are higher than those of Fe–O bonds, so this site will easily adsorb CCl 4 .…”