Chinese Journal of Catalysis ›› 2024, Vol. 63: 213-223.DOI: 10.1016/S1872-2067(24)60088-4
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Zhenhua Wua, Jiafu Shia,c,d,*(), Boyu Zhanga, Yushuai Jiaob, Xiangxuan Menge, Ziyi Chua, Yu Chena, Yiran Chenga, Zhongyi Jiangb,c,f,*(
)
Received:
2024-04-27
Accepted:
2024-06-21
Online:
2024-08-18
Published:
2024-08-19
Contact:
*E-mail: shijiafu@tju.edu.cn (J. Shi), zhyjiang@tju.edu.cn (Z. Jiang).
Supported by:
Zhenhua Wu, Jiafu Shi, Boyu Zhang, Yushuai Jiao, Xiangxuan Meng, Ziyi Chu, Yu Chen, Yiran Cheng, Zhongyi Jiang. Conjugated microporous polymers-scaffolded enzyme cascade systems with enhanced catalytic activity[J]. Chinese Journal of Catalysis, 2024, 63: 213-223.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(24)60088-4
Fig. 2. Structural feature and characterization of I-ECSs. (a) SEM image of I-ECSs. TEM (b) and EDS elemental mapping images (c-f) of I-ECSs. CLSM images of FITC-labeled GOx (green) (g) and coumarin-labeled HRP (blue) (h). FTIR spectra (i) and pore size distribution (j) of CMPs and I-ECSs.
Fig. 3. Creation of substrate channeling effect in I-ECSs. Catalytic activity curves and τ of different biocatalyst concentrations biocatalysts: 2c (a), c (b), and 0.5c (c). (d) Reaction rate ratios of different concentrations biocatalysts. Catalytic activity curves (e) and reaction rate ratios (f) of I-ECSs and S-ECSs treatment with varying concentrations of free catalase (CAT). Reaction rate ratios calculated from vI-ECSs/vS-ECSs (vI-ECSs and vS-ECSs refer to the reaction rate of I-ECSs and S-ECSs, respectively). (g) The binding energy (ΔE) of pore wall-H2O2 via DFT, and the insert showed the hydrogen-bonded bridges between pore wall and H2O2. (h) Schematic illustration of I-ECSs (above) and the modelling of mass transfer pathway of H2O2 from producing sites to consuming sites (below). (i) Schematic illustration of S-ECSs (above) and the modelling of mass transfer pathway of H2O2 from producing sites to consuming sites (below).
Fig. 4. Fortification of substrate channeling effect in I-ECSs. (a) Catalytic activity curves and τ of I-ECSs-x with different dosages of HRP (I-ECSs-x represented the dosages of HRP in I-ECSs and τx represented τ of I-ECSs-x, x = 1, 3, and 5 mg). (b) Relative activity of I-ECSs-1, I-ECSs-3 and I-ECSs-5 treatment with 25 μg mL-1 free CAT. Reaction rate ratios of I-ECSs-3 or I-ECSs-5 and I-ECSs-1 treatment with varying concentrations of free CAT 0 (c) and 25 (d) μg mL-1, which was calculated from v3/v1 and v5/v1 (v1, v2, and v3 represented the reaction rate of I-ECSs-1, I-ECSs-3 and I-ECSs-5, respectively). (e) Catalytic activity curves of I-ECSs and free GOx-HRP cascade systems (F-ECSs). Notably, the catalytic activity of GOx or HRP in F-ECSs was equivalent to that of GOx or HRP in I-ECSs, obtained by regulating the mass of GOx or HRP in F-ECSs. (f) Reaction rate ratios of I-ECSs and F-ECSs.
Fig. 5. Tolerance of I-ECSs to inhospitable conditions. Stability of I-ECSs and F-ECSs to inhospitable conditions pH resistance (a), heating resistance (b), and proteolytic agent resistance (urea, acetone and N,N-dimethylformamide) (c). (d) Recyclability of I-ECSs.
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