INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Zichen Wang,Tongyue Zhu,Hu Sun,Geling Kuang,Yuxiao Feng,Jiandong Cui
The encapsulation of enzymes in ZIF-8 (enzyme@ZIF-8 composites) via co-precipitation has attracted considerable attention. However, enzyme@ZIF-8 composites often exhibit low activity due to the three-dimensional (3D) structural characteristics of ZIF-8 and the protonation of the precursor, 2-methylimidazole (2-MeIm). In this study, a novel 2D catalase@ZIFs(SO4) composite was synthesized as an alternative to the conventional 3D catalase@ZIF-8 composites. The 2D catalase@ZIFs(SO4) composites demonstrated a nine-fold increase in activity and three-fold higher enzyme loading compared to their 3D counterparts. The enhanced catalytic performance is attributed to the 2D structure of the composites and the partial replacement of 2-MeIm with sulfate during enzyme immobilization, which reduces the protonation of 2-MeIm, enhances the hydrophilic microenvironment, and facilitates substrate transfer. Furthermore, compared to free enzymes, the 2D catalase@ZIFs(SO4) composites exhibited an expanded pH tolerance range, superior thermal stability, enhanced resistance to denaturants, and improved storage stability. To validate the concept, glucose oxidase, glutamate oxidase, and phenylalanine ammonia lyase were immobilized using the same approach. All immobilized enzymes demonstrated increased activity relative to the traditional CAT@ZIF-8 composites. This study offers a versatile platform for enzyme encapsulation within ZIF-8 through co-precipitation.
研究领域:
生物化学
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材料科学
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PubMed
高影响因子
Journal of Materials Chemistry A
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2018
·Vol. 6
·期 29
·14262-14271
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IF 9.931
Yefeng Feng,Cheng Peng,Jianbing Hu,Fupeng Wang,Zhichao Xu,Qi Huang
Bio-inspired superamphiphobicity, including high contact angles, low sliding angles and non-stick traits, in combination with high durability, such as strong wear resistance, pH endurance and mechanical properties, are difficult to simultaneously obtain in the large-scale fabrication of amphiphobic materials with the presently used blends of polymers and surface-modified hard inorganic nanoparticles. In the current work, a series of highly abrasion-resistant superamphiphobic membranes applicable in a wide pH range were fabricated by a facile vacuum filtration process from suspensions containing snake-shaped silica hybrid nanowires. Tetraethyl orthosilicate, trimethoxyoctadecylsilane and 2-perfluorooctylethyltrimethoxysilane monomers were hydrolyzed and condensed to yield silica nanowires through finely regulated anisotropic sol–gel growth in a water/oil emulsion. The snake-shaped morphology, aspect ratio and elemental distribution of the nanowires were tailored to endow them with strong self-assembly capacity due to capillary force action. As a result, a porous 3D network morphology and hierarchical structure were achieved across the entire membrane thickness based on the self-weaving behavior of the nanowires. Superamphiphobicity was acquired, including a maximum water contact angle (WCA) of ca. 162° and an oil contact angle (OCA) of ca. 155°. The water sliding angle (WSA) and oil sliding angle (OSA) were less than 5°. Desirable non-stick, anti-fouling, flexible and self-standing traits were obtained. Well-maintained superamphiphobicity was observed in a wide pH range (1 to 12). After 300 abrasion cycles, the superamphiphobicity was retained due to the porous 3D network morphology and hierarchical structure across the whole membrane thickness. Therefore, excellent superamphiphobicity and damage tolerance were finely balanced on the surfaces of these nanowire membranes. This work may enable large-scale preparation of promising superamphiphobic surfaces.
研究领域:
材料科学
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表面化学
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
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2018
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IF 5.807
Ibrahim Nasser Ahmed,Xiu-Li Yang,Amare Aregahegn Dubale,Ruo-Fei Li,Yi-Ming Ma,Lu-Ming Wang,Gui-Hua Hou,Rong-Feng Guan,Ming-Hua Xie
Developing a new cellulase-MOF composite system with enhanced stability and reusability for cellulose hydrolysis was aimed. Physical adsorption strategy was employed to fabricate two cellulase composites, and the activity of composite was characterized by hydrolysis of carboxymethyl cellulose. The NH 2 functionalized UiO-66-NH 2 MOF exhibited higher protein loading than the precursor UiO-66, due to the extra anchor sites of NH 2 groups. The immobilized cellulase showed enhanced thermostability, pH tolerance and lifetime. The maximum activity attained at 55 °C could be kept 85% when used at 80 °C, and the residual activities were 72% after ten cycles and 65% after 30 days storage. The abundant NH 2 and COOH groups of MOF adsorb cellulase and enhance its stability, and the resulted heterogeneity offered the opportunity of recovering composite via mild centrifuge. The findings suggest the promising future of developing cellulase-MOF composite with ultrahigh activities and stabilities for practical application.
研究领域:
生物化学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2013
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IF 3.925
Yuyuan Yao,Yajun Mao,Qunfeng Huang,Lie Wang,Zhengfu Huang,Wangyang Lu,Wenxing Chen
In this study, we evaluated a novel heterogeneous catalytic system (hemin-ACF/H 2 O 2 ) based on activated carbon fiber supported hemin for the rapid removal of dyes. Contrast experiments, effects of pH and temperature, and sustained catalytic stability of hemin-ACF for the catalytic decomposition of azo dye RR195 used as a model pollutant were investigated. Surprisingly, the introduction of ACF significantly enhanced the decomposition of dyes by hemin with an obvious improvement in pH tolerance and stability. Inhibition and probe studies combined with electron paramagnetic resonance (EPR) were conducted to ascertain the role of several radicals ( OH, O 2 − /HO 2 , 1 O 2 and Fe IV O) on dye degradation. ACF are rich in free electrons, and the π-conjugated macrocyclic structure of hemin may present convenient channels for the transfer of free electrons from the ACF, promoting the generation of hydroxyl radicals and high-valence iron species. These results are promising because they offer new insight for the application of hemin as a catalyzer upon treatment of organic pollutants and contribute to identification of the interaction between support material and catalyzer from a new perspective.
研究领域:
环境科学
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催化化学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Feilin Lin,Siyu Wang,Bernard P. Binks,Jianzhong Jiang
High internal phase Pickering emulsions (HIPPEs) have attracted increased interest due to their diverse applications in fields such as food and material science. The pH value may vary in different application fields; however, maintaining the stability of HIPPEs at various pH levels presents a notable challenge. Here we describe photo-responsive HIPPEs tolerant to different pH values (pH = 2–12) with up to 96 % internal phase through one-step emulsification without pre-treatment (such as ultrasonic dispersion). The emulsifier was formed by the host–guest interaction between chitosan-grafted cyclodextrin (CS-CD) and azobenzene (C 4 AzoC 6 N). The microstructure of the porous materials prepared from the HIPPEs can be regulated by the photo-triggered adsorption of supramolecular polymers at the oil–water interface. Moreover, due to the photochromism properties of C 4 AzoC 6 N, a colour-changing writing ink can be obtained without any additive, making it an ideal candidate for 4D printing. This strategy provides a simple and efficient method for preparing pH-tolerant HIPPEs in a one-step process, expanding the range of applications in 4D printing and functional materials.
研究领域:
材料科学
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食品科学
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2013
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IF 3.473
Lijie Sun,Yuyuan Yao,Lie Wang,Yajun Mao,Zhenfu Huang,Daichuan Yao,Wangyang Lu,Wenxing Chen
The development of a pH-tolerant Fenton-like catalyst is an active and challenging project in water treatment. In this study, activated carbon fibers (ACFs) supported 8-hydroxyquinoline ferric (QuFe) has been reported as a heterogeneous Fenton-like catalyst (QuFe@ACFs) for efficient removal of dyes. The catalyst possessed remarkable catalytic performance across a wide range of pH values (3–9). Moreover, it also presented excellent sustained catalytic ability and regeneration capability in the experiments, causing reducing secondary contamination. Importantly, with the introduction of ACFs, QuFe@ACFs exhibited a greatly enhanced catalytic activity in comparison with bare QuFe. The hydroxyl radicals ( OH) are confirmed as the active species in QuFe@ACFs/H 2 O 2 system by the use of electron paramagnetic resonance (EPR) and fluorescence spectra. In addition, the central composite design (CCD) matrix and response surface methodology (RSM) were applied in designing the experiments for evaluating the interactive effects of temperature, pH, initial dye concentration and catalyst dosage. This study not only opens a novel avenue for designing pH-tolerant heterogeneous Fenton-like catalyst, but also provides a viable process for efficient elimination of dyes effluent.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Chemistry-An Asian Journal
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2018
·Vol. 13
·期 6
·672-678
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IF 3.692
Bo Zhang,Wei-An Li,Yi-Yu Liao,Chen Zhang,Mei-Ling Feng,Xiao-Ying Huang
Graphical Why don′t you give me a nickel? An organically templated three-dimensional Ga-Sb-S compound is reported that exhibits a Ni 2+ ion-exchange property, namely, [CH 3 NH 3 ] 4 Ga 4 SbS 9 QH (Q=S/O) ( 1 ). An open-framework chalcogenidoantimonate, namely, [CH 3 NH 3 ] 4 Ga 4 SbS 9 S 0.28 O 0.72 H ( 1 ), has been solvothermally synthesized and structurally characterized. Interestingly, 1 showed Ni 2+ ion-exchange properties and wide pH resistance, with a maximum exchange capacity of 76.9 mg g −1 . To the best of our knowledge, this is the first example of amine-directed three-dimensional (3D) heterometallic chalcogenidometalates for highly selective Ni 2+ ion capture with a high distribution coefficient ( K d =1.65×10 5 mL g −1 ).
研究领域:
无机化学
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材料科学
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PubMed
高影响因子
Journal of Energy Chemistry
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2025
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IF 14.9
Lina Hu,Zengyu Han,Ya Chen,Yaoda Liu,Lei Li,Jie Su,Zhengfei Dai,Dong-Shuang Wu
The development of pH‐robust electrocatalysts is highly desirable but challenging for the hydrogen evolution reaction (HER) in water electrolysis. Among the noble metal groups, ruthenium (Ru) holds the promise in balancing the cost and activity in HER, but it is restricted by the strong H adsorption and the sluggish Heyrovsky step. It appeals for a rational d -band manipulation to neutralize the hydrogen adsorption to promote the HER kinetics. Herein, we profiled a confined structure with RuCo alloy nanoparticles in N-doped carbon nanofiber (RuCo@NCNF) by a facile electrospinning-pyrolysis process for HER electrocatalysis. An electron transfer from Co to Ru is indicated in the RuCo@NCNF composite to enhance the electron-donating character of Ru active sites to couple the HER. Resultantly, the optimized Ru 1 Co 2.5 @NCNF catalyst stably exhibits the Pt-beyond HER activity in both alkaline (10 mV at 10 mA cm −2 ) and acidic electrolytes (23 mV at 10 mA cm −2 ), while delivering competitive HER performance in neutral electrolytes. Density functional theory (DFT) calculations also confirm that the Ru-Co electronic interactions can effectuate the d -band center downshift, moderating the adsorption energies of hydrogen (Δ G H* ) and H 2 O for efficient hydrogen production. This study provides a reference for the rational design of Ru-based pH-robust HER electrocatalyst through confined nanoalloy structures.
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高影响因子
Journal of Physical Chemistry C
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2024
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IF 3.3
Chunxiao Wu,Sha Zhang,Jin Zhong Zhang,Yan Li
Water contamination from industrial activities has been a major problem throughout the world. Typically, lead ions (Pb2+) are recognized as a persistent contaminant posing a great threat to our environment and human health, which urgently needs to be solved. Adsorption is one of the most effective ways to solve it. MXenes show great potential for applications in the fields of adsorption due to their large specific surface area, excellent hydrophilicity, and structural stability. In this work, a series of V2CTx MXenes including multilayered V2CTx MXene (M-V2C), alkalized V2CTx MXene (A-V2C), and single-layer V2CTx MXene (S-V2C) were prepared by an etching method to apply for Pb2+ adsorption. Compared to M-V2C and A-V2C, S-V2C not only had the highest adsorption efficiency under the same conditions but also exhibited a wide pH adsorption ability in the range of 1–14, which cannot be achieved by other adsorbents. In addition, it showed great cycle performance after 10 cycles and selective adsorption of Pb2+ in the presence of other ions. Factors affecting the Pb2+ adsorption capacity of V2C and related mechanisms were also thoroughly investigated. This work demonstrates for the first time that S-V2C is a novel adsorbent material with excellent pH tolerance, regeneration performance, and selective adsorption ability, which shed bright light on the related applications.
研究领域:
环境科学
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材料科学
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水处理
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DOI
高影响因子
Emergent Materials
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2025
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IF 4.1
Shi Zhengzheng,Li Jia,Pan Yupeng,Li Xuewei,Zhuang Zile,Li Yihan,Zhang Zheng,Wang Zirui,Luo Qizhi,Chen Xuncai
The Fenton-like reaction has always been hampered by limitations related to its narrow pH range and poor stability. In this study, we successfully developed a novel catalyst composed of Prussian blue (PB) nanoparticles anchored onto carbon-defective g-C 3 N 4 (CD-C 3 N 4 ) nanosheets with a porous structure. Under visible light irradiation for 120 min, the removal efficiencies of tetracycline can achieve remarkably high removal rates as 93.3%. Significantly, this catalyst attains exceptional long-term stability enabling up to 20 cycles, while consistently maintaining a degradation efficiency exceeding 99%. Furthermore, this system exhibits a wide pH tolerance ranging from 3 to 9. Efficient charge separation and the introduction of carbon defects on the g-C 3 N 4 nanosheets contribute to the robust Fe 3+ /Fe 2+ cycles in PB, which support prolonged multiple recycles. ESR and quenching tests indicated that •O 2 − species play a significant role in catalytic degradation, with •OH and h + also being involved in the photo-Fenton reaction. Finally, we proposed potential photo-Fenton degradation pathways for tetracycline(TC) and conducted a comprehensive investigation into the toxicity changes of TC degradation through full-scale zebrafish toxicology assays. This work presents an innovative approach to construct highly stable Fenton-like catalysts through structural defect engineering combined with Fe-Metal organic frameworks(MOFs) loading strategies.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMOSPHERE
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2023
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IF 8.8
Zhenda Liang,Zhiquan Chen,Yongtao Xu,Haiqing Wang,Li Zhou,Bing Yan
Manganese dioxide (MnO 2 ) has been recognized as one of the natural systems' most active mineral oxidants. However, when it comes to catalytic oxidation of antibiotic applications, pure MnO 2 falls short in delivering satisfactory performance. Hence, a set of Fe 3+ -doped porous MnO 2 (0.02Fe–MnO 2 , 0.1Fe–MnO 2 , and 0.14Fe–MnO 2 ) nanoparticles were synthesized here via a convenient and energy-efficient one-step reaction method. A series of experiments revealed that Fe-doping strategy enhances the properties of MnO 2 host by suppressing the crystalline structure, increasing the amount of surface oxygen defects, and modifying the Mn 3+ /Mn 4+ ratio. Specifically, the tetracycline (TC) removal efficiency of 0.14Fe–MnO 2 reaches 92% without the need for any additional co-oxidant, representing a 20% improvement over pristine MnO 2 nanoparticles . Moreover, this process shows a fast dynamic (achieving 70% of TC removal in just 5 min) and demonstrates pH-resistance, maintaining high TC removal efficiency (≥90%) over a wide pH range of 3.0–9.0. Mechanical studies reveal that the degradation of TC can be attributed to the oxidation by reactive oxygen radicals and Mn 3+ , with 1 O 2 being the primary radical involved in the reaction, accounting for 55% of TC removal. Importantly, cytotoxicity testing indicates that the biotoxicity of TC toward organisms can be effectively mitigated using 0.14Fe–MnO 2 nanomaterial . This study presents a readily applicable candidate for economically and conveniently eliminating of environmental TC pollution, thereby reducing the threat posed by TC pollution to the ecosystem.
研究领域:
环境科学
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纳米技术
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化学工程
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
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2024
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IF 3.3
Nawei Zhang,Yang Xu,Xiao Jia,Xiao Li,Jingnan Ren,Siyi Pan,Gang Fan,Jinchu Yang
BACKGROUND Citrus products often suffer from delayed bitterness, which is generated from the conversion of non-bitter precursors (limonoate A-ring lactone, LARL) to limonin under the catalysis of limonin D-ring lactone hydrolase (LDLH). In this study, LDLH was isolated and purified from sweet orange seeds, and a rapid and accurate high-performance liquid chromatography method to quantify LARL was developed and applied to analyze the activity and enzymatic properties of purified LDLH. RESULTS Purified LDLH (25.22 U mg −1 ) showed bands of 245 kDa and 17.5 kDa molecular weights in native polyacrylamide gel electrophoresis (PAGE) and sodium dodecyl sulfate PAGE analysis respectively. After a 24 h incubation under strongly acidic (pH 3) or strongly alkaline (pH 9) conditions, LDLH still retained approximately 100% activity. Moreover, LDLH activity was not impaired by thermal treatment at 50 °C for 120 min. Enzyme inhibition assays showed that LDLH was inactivated only after ethylenediaminetetraacetic acid treatment, and other enzyme inhibitors showed no significant effect on its activity. In addition, the LDLH activity of calcium ion (Ca 2+ ) intervention was 108% of that in the blank group, and that of zinc ion (Zn 2+ ) intervention was 71%. CONCLUSION LDLH purified in this study was a multimer containing 17.5 kDa monomer with a wide pH tolerance range (pH 3–9) and excellent thermal stability. Moreover, LDLH might be a metallopeptidase, and its activity was stimulated by Ca 2+ and significantly inhibited by Zn 2+ . These findings improve our understanding of LDLH and provide some important implications for reducing the bitterness in citrus products in the future. © 2024 Society of Chemical Industry.
研究领域:
植物科学
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生物化学
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食品科学
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酶学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）