Controllable synthesis of hollow ZIF-8 microspheres via interface reaction with enhanced CO₂ adsorption

Hollow zeolite imidazolate frameworks (HZIFs) have a wide application prospect, but the controllable synthesis still keeps a great challenge. Herein, hollow ZIF-8 microspheres are fabricated using a simple mechanical emulsification method by controlling the feeding rate of precursors. The hierarchically porous structure with uniform morphology and size, high crystallization, abundant base sites, and meso/macro pores endows the as-fabricated hollow ZIF-8 superior CO₂ adsorption capacity. This work provides new opportunities for controllable synthesis of HZIFs and their applications in the separation and purification of gases.