Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (12): 20230355.doi: 10.7503/cjcu20230355

• Physical Chemistry • Previous Articles     Next Articles

Construction of Carbonic Anhydrase Mimetic Cerium-containing Nanozyme for the Carbon Dioxide Fixation

AI Yanru1, CAI Qijun2, WANG Jiao2, ZHANG Yutong2, BAI Yujia2, CHEN Xiaoming3, LYU Rui2()   

  1. 1.Technology Research Institute of Ecology,Energy?Saving,Environmental Protection and Low?Carbon Mianyang Science & Technology City New Area,Mianyang 621010,China
    2.School of Chemistry and Chemical Engineering,Mianyang Teachers’ College,Mianyang 621000,China
    3.School of Life Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China
  • Received:2023-08-04 Online:2023-12-10 Published:2023-10-24
  • Contact: LYU Rui E-mail:ruilv01@mtc.edu.cn
  • Supported by:
    the PhD Research Startup Foundation of Mianyang Teachers’ College, China(QD2023A27);the College Student Innovation and Entrepreneurship Training Program of Mianyang Teachers’ College, China(2023034)

Abstract:

A cerium-containing organophylosilicate(ACOP) was synthesized by one-step sol-gel method under room temperature, and its carbonic anhydrase-like activity was investigated. It was found that ACOP presented a layered structure similar to that of phyllosilicates, and the Ce in the structure is connected to the skeleton by coordination. In addition, ACOP exhibited promising carbonic anhydrase-like catalytic activity and excellent stability under extreme temperature and pH conditions. When the temperature was higher than 70 ℃, the natural carbonic anhydrase showed completely deactivated, while ACOP still retained more than 80% catalytic activity. Moreover, it also maintained about 90% catalytic activity under pH value of 3—9, which is superior to that of natural enzyme. Finally, the as-prepared ACOP was employed for the catalytic conversion of carbon dioxide. It was revealed that the ACOP can efficiently convert carbon dioxide into carbonate and form calcium carbonate precipitation in the presence of calcium ion, thus realizing the fixation of carbon dioxide at room temperature. This study provides a promising strategy for rational design of carbonic anhydrase mimetic nanozyme, as well as proposes a new route for efficient conversion of carbon dioxide.

Key words: Layered organohyllosilicate, Carbonic anhydrase-like nanozyme, Carbon dioxide fixation

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