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- Title
Efficient bisphenol A removal by a photocatalyst-enzyme hybrid system: Horseradish peroxidase integrated with carbon vacancy-modified carbon nitride nanosheets.
- Authors
Du, Jiaoyang; Dang, Xueming; Gan, Xiaorong; Cui, Xin; Zhao, Huimin
- Abstract
Peroxidase-based treatment that uses H 2 O 2 as the clean oxidant appears promising for the removal of aqueous phenolic endocrine disrupting chemicals (EDCs). However, oxidative degradation of active heme species at high H 2 O 2 concentrations leads to irreversible enzyme inactivation. The method of combining photocatalysis and enzyme biocatalysis could alleviate the issue by photocatalytic in-situ H 2 O 2 production. In this study, we constructed a photocatalyst-enzyme hybrid system that integrated the horseradish peroxidase with carbon vacancy-modified carbon nitride nanosheets (HRP@ACNNs). Attributed to the modified carbon nitride, the HRP@ACNNs exhibited higher substrate affinity and comparable catalytic efficiency compared to free HRP. This photocatalyst-enzyme hybrid system could offer H 2 O 2 continuously to sustain enzymatic catalysis without enzyme inactivation as well as stabilize the enzyme. The bisphenol A (BPA) removal experiments further confirmed the effectiveness in treating phenolic EDCs of the prepared HRP@ACNNs.
- Subjects
HYBRID systems; HORSERADISH peroxidase; ENZYME inactivation; PHOTOCATALYSTS; ENDOCRINE disruptors; PHOTOCATALYSIS; NITRIDES
- Publication
Process Safety & Environmental Protection: Transactions of the Institution of Chemical Engineers Part B, 2024, Vol 181, p387
- ISSN
0957-5820
- Publication type
Article
- DOI
10.1016/j.psep.2023.11.049