Accelerated CO2 capture using immobilized carbonic anhydrase on polyethyleneimine/dopamine co-deposited MOFs
2022; Elsevier BV; Volume: 189; Linguagem: Inglês
10.1016/j.bej.2022.108719
ISSN1873-295X
Autoresjiabao xv, Zeyang Zhang, Saizhao Pang, Jiahui Jia, Zixin Geng, Ruirui Wang, Peikun Li, Muhammad Bilal, Jiandong Cui, Shiru Jia,
Tópico(s)Electrochemical sensors and biosensors
ResumoImmobilized carbonic anhydrase (CA, EC4.2.1.1) for CO2 capture has been intensively investigated. Unfortunately, the immobilized CA usually shows low CO2 capture efficiency due to lack of CO2 capture function for the conventional CA supports. In this study, an acid-resistant metal-organic framework MOF-808 was first modified by co-deposition of PEI (polyethyleneimine) and PDA (polydopamine) (PEI/PDA-MOF-808). Subsequently, the PEI/PDA-MOF-808 with a large number of amino groups was used as the strengthening material of CO2 capture to immobilize CA ([email protected]/PDA-MOF-808). The resultant [email protected]/PDA-MOF-808 showed a considerably improved CO2 capture capacity compared with free CA and PEI/PDA-MOF-808. The amount of CaCO3 produced by [email protected]/PDA-MOF-808 was 11.0-fold and 2.5-fold higher than free CA and PEI/PDA-MOF-808, respectively. After 8 consecutive rounds of CO2 conversion, the total production of CaCO3 by [email protected]/PDA-MOF-808 was 92-fold higher than free CA, reaching 294.0 mg. Furthermore, [email protected]/PDA-MOF-808 displayed high thermostability, pH stability, storage stability, and reusability compared with free counterpart. After 1 h treatment at pH 3.0, [email protected]/PDA-MOF-808 preserved 53.6% of its original activity while free CA was almost inactivated. In conclusion, this work provides a promising strategy for enzymatic CO2 conversion.
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