ZIF-8基仿生碳酸酐酶构建及对CO_(2) 高效矿化

Construction of ZIF-8 based bionic carbonic anhydrase andits efficient mineralization of CO_(2)

为了提高碳酸酐酶纳米酶的催化活性,基于碳酸酐酶活性中心结构将碳酸酐酶中常见的氨基酸天门冬氨酸(Asp)、谷氨酸(Glu)原位植入ZIF-8骨架中,成功合成仿生碳酸酐酶材料ZIF-Asp、ZIF-Glu,并搭建了CO_(2)矿化装置实现了CO_(2)的连续化制备。结果表明:ZIF-Asp、ZIF-Glu的催化能力显著提高,分别是原始ZIF-8的1.38、1.27倍,所设计的CO_(2)连续矿化装置能实现CO_(2)的连续转化矿化,1 h能生成1171 mg的微米尺度碳酸钙并实现72.3%的CO_(2)转化率。

In order to improve the catalytic activity of carbonic anhydrase nanoenzymes,this study implanted common amino acids aspartic acid(Asp)and glutamic acid(Glu)from carbonic anhydrase into the ZIF-8 framework based on the active center structure of carbonic anhydrase.Biomimetic carbonic anhydrase materials ZIF Asp and ZIF Glu were successfully synthesized,and a CO_(2)mineralization device was constructed to achieve continuous CO_(2)preparation.The results show that the catalytic ability of ZIF Asp and ZIF Glu is significantly improved,1.38 and 1.27 times that of the original ZIF-8,respectively.The designed CO_(2)continuous mineralization device can achieve continuous conversion mineralization of CO_(2),generating 1171 mg of micrometer scale calcium carbonate in 1 hour and achieving a CO_(2)conversion rate of 72.3%.