ACS Materials Au
·
2026
·
IF 9.1
Yuhan Li,Zhuoyang Du,Yongheng Shi,Zeqing Liu,Lingmei Dai,Dehua Liu,Wei Du
Enzyme immobilization on solid supports enhances stability and reusability, yet nanoscale carriers such as metal–organic frameworks (MOFs) still face challenges in efficient recovery. While pyrolysis can magnetize Fe-MOFs, conventional methods often compromise either enzyme activity or structural integrity. This study presents a rational two-step oxidation–reduction (O–R) pyrolysis strategy to convert Meso-MIL-88A into a magnetically recyclable, mesoporous biocatalyst support (O-R500). Unlike one-step carbonization, which generates enzyme-incompatible Fe3O4, or carbonization-oxidation routes that collapse the framework, our approach first transforms the MOF into a robust α-Fe2O3 template while preserving its morphology. Citric acid then acts as a mild, slow-releasing reductant, selectively producing a γ-Fe2O3-rich phase without damaging the mesostructure. The resulting O-R500 exhibits well-defined mesopores (∼13 nm), sufficient magnetization (16 emu/g) for rapid separation, and a biocompatible surface that maintains the native conformation of immobilized Candida antarctica lipase B (CalB). In the synthesis of phosphatidyl EPA/DHA, CalB@O-R500 achieved 84.5% incorporation and retained 90.3% activity over five cycles, outperforming nonmagnetic counterparts. This work not only provides a high-performance magnetic biocatalyst but also establishes a generalizable design principle for converting Fe-MOFs into structured, biocompatible, and functionally integrated carriers.
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Wanlin Qin,Lufang He,Yuchi Zhang,Bohan Li,Le Han,Yan Xu
Construction of heterocompositional hybrid metal–organic frameworks (MOFs) by integration of more than two MOFs is a smart strategy for fine-tuning MOF properties. In this work, a novel yolk-shell MIL-88A@NiFe-PB heterostructure, in which MIL stands for Materials from Institute Lavoisier, and PB represents the coordination network of Prussian Blue, was fabricated through a fast wrapping and then inward-etching growth synthetic strategy under mild stirring condition. The thickness of the outmost layer of NiFe-PB and the internal core structure of MIL-88A can be controlled by tuning the concentration of K 4 [Fe(CN) 6 ]·3H 2 O in the assembly system. A rational growth mechanism for the yolk-shell MIL-88A@NiFe-PB heterostructure was proposed. The as-prepared yolk-shell MIL-88A@Ni 10 Fe PB-50 architectures were then explored for non-enzymatic glucose sensing. The results show that the designed glucose sensor exhibits a high sensitivity of 1963.2 μA mM −1 cm −2 over a wide linear range of 0.005–1.0 mM, a low detection limit (0.12 μM), as well as a fast reaction time (<2 s) and long-term stability for non-enzymatic glucose detection. Also, it shows good applicability in real serum samples. This work provides a “wrapping-inward-etching” synthetic strategy for construction of hybrid MOFs with exceptional outstanding non-enzymatic glucose sensing performance, providing a reasonable guide for construction of other MOF on MOF intriguing structures for electrochemical sensing applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Ranran Yuan,Jinli Qiu,Cailiang Yue,Chen Shen,Dawei Li,Changqing Zhu,Fuqiang Liu,Aimin Li
Hierarchical MIL-88A(Fe)@ZnIn 2 S 4 heterostructures were synthesized via a facile low-temperature solvothermal method. The combination of MIL-88A(Fe) and ZnIn 2 S 4 produced excellent photocatalytic properties under sunlight irradiation. The enhanced separation efficiency of the photogenerated charge carriers facilitated the optimal photocatalytic performances of 12.5%-HMIL@ZIS, with 100% the of hexavalent chromium (Cr(VI)) and 99.6% of the sulfamethoxazole being converted within 9 min and 60 min at pH 5, respectively. The kinetic rate constants of Cr(VI) reduction (0.5864 min −1 ) and sulfamethoxazole (SMZ) degradation (0.0958 min −1 ) were approximately 15 and 5 times larger than those previously reported. The formation of ·O 2 − could promote the super-high conversion of Cr(VI). Meanwhile, the synergetic effect of 1 O 2 and ·O 2 − played a dominant role in the degradation of sulfamethoxazole. Furthermore, the satisfactory photocatalytic performances could be maintained after four cycles. This work provides new insights into the design of metal-organic framework based photocatalysts and indicates the great potential for efficient purification of actual wastewater.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Jiabao Gu,Qianwen Li,Xuanyu Long,Xiaohan Zhou,Nan Liu,Zequan Li
In this study, we synthesized the MBSr (MIL-88A(Fe)/BiOBr/SrFe 12 O 19 ) dual Z-scheme heterojunction via an accessible hydrothermal method and investigated the photocatalytic performance of MBSr composites for Rhodamine B (RhB) and Methylene blue (MB). The MBSr-1% photocatalyst exhibited excellent photocatalytic performance, resulting the degradation rate of RhB reached approximately 96.2% within 60 min, which was higher than that of M88 (34%), BiOBr (89%) and M88/BiOBr-7% (93.7%) composites. And the MBSr-1% could eliminate 90.1% of MB within 90 min, which displayed the best photodegradation efficiency of prepared photocatalysts. The enhanced photocatalytic performance can be ascribed to the formation of dual Z-scheme heterojunction, which enhanced visible-light absorption and facilitated the transfer of photoinduced carriers. The MBSr-1% was proved to have excellent stability and reusability after six-recycling run. Furthermore, the major reactive species were h + , •O 2 − and •OH by radical trapping experiments. Finally, a possible photocatalytic pathway and mechanism of MBSr photocatalysts was proposed.
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 25
·20111
·
IF 4.6
Abdelazeem S Eltaweil,Mohammed Salah Ayoup,Jawaher Y Al Nawah,Eman M Abd El-Monaem
An effective Fenton-like Fe 3 O 4 /MIL-88A/BC catalyst was fabricated by combining magnetite nanoparticles (Fe 3 O 4 ) with diamond-shaped MIL-88A and Chenopodium -derived biochar for the degradation of 2-NP. The elemental composition, morphology, functional groups, surface net charge, and crystallographic phase of the Fe 3 O 4 /MIL-88A/BC catalyst were examined using various characterization techniques, including XPS, SEM, FTIR, ZP, and XRD. Optimization experiments were conducted to determine the optimal Fenton-like degradation conditions for 2-NP using H 2 O 2 /Fe 3 O 4 /MIL-88A/BC. Laboratory experiments showed that the 2-NP degradation efficiency by H 2 O 2 /Fe 3 O 4 /MIL-88A/BC reached 91.04% within 120 min at pH = 5, Fe 3 O 4 /MIL-88A/BC = 10 mg, and H 2 O 2 concentration = 500 mg L −1 . Kinetic studies indicated that the Fenton-like degradation of 2-NP followed a second-order model, while H 2 O 2 decomposition was best described by a first-order model. Quenching tests indicated that the Fenton-like reaction of 2-NP proceeded via a radical mechanism and confirmed that the ˙OH radicals are the controlling reactive O-species. The degradation mechanism of 2-NP was proposed based on the XPS spectra of the neat and used Fe 3 O 4 /MIL-88A/BC catalysts. The intermediates obtained from the Fenton-like degradation of 2-NP by the Fe 3 O 4 /MIL-88A/BC catalyst were predicted from the GC-MS spectrum. A magnetic Fe 3 O 4 /MIL-88A/BC composite was fabricated from BC, MIL-88A and magnetite for the catalytic degradation of 2-nitrophenol via a Fenton-like reaction.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）