研究生学术报告预告登记(开题、中期、答辩)

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报告人: 张博禹
学号: 2020214115
学院: 环境科学与工程学院
报告类型: 第二次学术报告
日期: 16 December 2020
时间: 1:30 PM
地点: 线上报告
导师: 石家福
题目: Dopamine/Polyethylenimine-Modified Silica for Enzyme Immobilization and Strengthening of Enzymatic CO2 Conversion
内容提要:

Enzymatic conversion of CO2 to high-value chemicals is a green route of resource reutilization, which is limited by low solubility of CO2 in mild conditions. Here, silica microspheres were first modified by the co-deposition of polyethyleneimine (PEI) and dopamine and the resultant polydopamine (PDA)/PEI-SiO2 was then used as the strengthening material of the enzymatic conversion of CO2 to formate. The initial reaction rate increased from 13.4 to 27.2 times with the loading amount of PDA/PEI-SiO2 increasing from 0.1 to 0.4 g. Following that, PDA/PEI-SiO2 was used as the carrier for the immobilization of carbonic anhydrase (CA). As a result of synergism, the formate synthesis was accelerated up to 48.6 times with a low loading amount of 0.2 g of PDA/PEI-SiO2-CA. Although the promoting effect of PDA/PEI-SiO2 retained only 56.1% after being used once, PDA/PEI-SiO2-CA retained 95.1% activity after 10 cycles of use. It was presumed that CA boosted the impact and reusability of PDA/PEI-SiO2 by improving CO2 desorption. This work is much significant in providing a simple and high-efficiency strategy for process intensification of enzymatic CO2 conversion.

图片:
登记人: 张博禹
登记时间: Friday, 12 March 2021, 12:40 PM