生物复合材料
双酚A
膜
化学工程
化学
聚合
咪唑酯
复合数
色谱法
材料科学
有机化学
生物化学
聚合物
复合材料
工程类
环氧树脂
作者
Shanshan Zhang,Dongliang Li
标识
DOI:10.1016/j.jece.2023.109750
摘要
As conventional water purification technologies are inefficient, they put us at risk of exposure to emerging micropollutants. Here, we report a two-step method for rapid construction of a stable [email protected] biomimetic membrane comprising enzyme-embedded metal–organic framework-based biocomposites for continuous and efficient removal of micropollutants from water. We first prepared a horseradish [email protected] imidazolate framework-8 ([email protected]) biocomposite via ball-milling method, capable of preserving structural integrity and the entrapped enzyme bioactivity under different denaturing environments. The second step involves biocomposite membrane synthesis via stimulation of polydopamine (PDA) polymerization with UV light after successively dispersing the dopamine and [email protected] biocomposite molecules in a neutral pH Tris-HCl system. Accompanied by the clever codeposition with PDA, the [email protected] biocomposite can be “sandwiched” between the PDA layers to create a stable [email protected] membrane ([email protected]). [email protected] synergistically integrates MOF adsorption, enzyme catalysis, and membrane separation functions. The calculated encapsulation rate of the [email protected] biocomposite is ≤ 98.2 %. The [email protected] composite membrane has a catalytic degradation efficiency of 98 % for bisphenol A (1 mg/L), membrane water flux of 32.3 L/m2 h bar, outstanding stability, and high efficiency after 7 cycles of use. Surprisingly, the bisphenol A removal rate of the [email protected] composite membrane remained stable under varying denaturing conditions, including wide pH and temperature ranges and proteolytic enzymes, indicating that HRP enzyme activity is well preserved, probably owing to the bio-inertness of ZIF-8. In conclusion, we propose a new, simple, and fast method for the constructing [email protected] composite membranes, which can significantly improve water purification.
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