Space-Confined Synthesis of ZIF-67 Nanoparticles in Hollow Carbon Nanospheres for CO2 Adsorption
Qi Li, Jiangna Guo, Hai Zhu, and Feng Yan*（严锋）
Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application Department of Polymer Science and Engineering College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123, China
Small 2019, 15, 1804874
Herein, the design and synthesis of ZIF‐67 nanoparticles (NPs) with tunable size grown inside hollow carbon nanospheres (ZIF‐67@HCSs) via a space‐confined strategy is reported. HCSs are first prepared via pyrolysis of polystyrene@polypyrrole (PS@PPy) composite nanospheres. Further infiltration of 2‐methylimidazole (MI) into the HCSs (MI@HCSs) using a melting‐diffusion strategy, followed by immersing MI@HCSs into Co(NO3)2 solution through the pores and channels of HCSs results in the formation of ZIF‐67@HCSs. The as‐synthesized ZIF‐67@HCSs with tunable ZIF‐67 size is achieved by changing the amount of MI. Due to the high pore volume provided by nanoscale ZIF‐67 NPs, the as‐prepared core–shell ZIF‐67@HCSs exhibit outstanding adsorption capacity for CO2.