Dual‐networks Enhanced Hollow ZIF‐8 Particles for Water Treatment

Abstract Hollow ZIF‐8 particles are promising materials for water treatment because of the high porosity and catalytic activities under photon irradiation. However, hollow ZIF‐8 particles can easily degrade under harsh conditions due to the weak stability. Here, we synthesize hollow ZIF‐8 particles with polyphenol and polyethylene glycol networks embedded. The multiple interactions among the ZIF‐8 frameworks and the networks increase the mechanical and chemical stability of the hollow ZIF‐8 particles as suggested by a series of spectra. Uptake of methylene blue about 128 mg/g by the hollow particles is realized. Furthermore, hydroxyl or superoxide radicals for degradation of the adsorbed methylene blue are effectively generated through irradiation of the hollow ZIF‐8 particles. In a water treatment test, the model pollute with a concentration of 50 mg/L is completely removed within half an hour. The performance of the recycled hollow ZIF‐8 particles is proved to be significant, indicating the practical potential of the material.