Direct Synthesis of Two-Dimensional Metal-Organic Framework Nanoplates for Noble Metal Load and Gaseous Iodine Adsorption

A new strategy has been developed to directly synthesize two-dimensional metal-organic framework nanoplates in an aqueous system without any additives. Time-dependent experiments demonstrate that formation mechanisms mainly include limited diffusion of reactants in transient phase and capping-agent-like effect of HOOC-CH=CH-COO^-. The obtained 2D MIL-53(Al)-FA exhibited intrinsic surface functional groups (-COOH) and accessible pores. Ag nanoparticles loaded on 2D product via electrostatic interactions between -COOH and positive Ag⁺ could accelerate catalytic decolorization of methyl orange in the presence of NaBH₄. Furthermore, the product could be a good candidate for adsorption of gaseous iodine due to accessibility of the pores.