Polyethylenimine-Grafted Silica Nanoparticles Facilitate Enzymatic Carbon Dioxide Conversion

被引：5

作者：

Liu, Yu ^{[1
]}

Li, Yu-Tong ^{[1
]}

Liu, Ling ^{[1
]}

Bai, Shu ^{[1
,2
,3
]}

Yu, Lin-Ling ^{[1
,2
,3
]}

Sun, Yan ^{[1
,2
,3
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300350, Peoples R China

[2] Tianjin Univ, Key Lab Syst Bioengn, Tianjin 300350, Peoples R China

[3] Tianjin Univ, Frontiers Sci Ctr Synthet Biol, Minist Educ, Tianjin 300350, Peoples R China

来源：

CHEMICAL ENGINEERING & TECHNOLOGY | 2023年 / 46卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Carbon dioxide conversion; Enzyme immobilization; Enzyme mimetics; Phosphoenolpyruvate carboxylase; Polyethylenimine; PROTEIN ADSORPTION; CO2; REDUCTION; IMMOBILIZATION; ANHYDRASE; CAPTURE; DEHYDROGENASE; PERFORMANCE; STABILITY; CAPACITY; CARRIERS;

D O I：

10.1002/ceat.202200271

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Polyethylenimine (PEI)-grafted silica nanoparticles were fabricated and characterized for the electrostatic immobilization of a CO2 conversion enzyme. PEI was supposed to serve as a carbonic anhydrase mimic for CO2 capture and conversion to HCO3- (the optimal substrate of many CO2 conversion enzymes) and was proved to assist phosphoenolpyruvate carboxylase to form a dual-enzyme cascade system for CO2 conversion. The immobilized enzyme not only presented better thermostability, pH tolerance, and storage stability, but also enhanced the specific activity (three- and fourfold for HCO3- and CO2 as the substrates, respectively), with good reusability and low cost. It was proven that PEI-grafted nanoparticles are highly efficient nanocarriers for immobilizing CO2-converting enzymes in industrial applications.

引用

页码：858 / 864

页数：7

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