ACS Applied Bio Materials
·
2019
·
IF 0
Junsong Mou,Xianzhen Xu,Feifei Zhang,Jianfei Xia,Zonghua Wang
Nanozymes are a class of nanomaterials with enzyme-like activities that have been extensively studied for their possibilities and superiorities over natural enzymes. Intelligent design and fabrication of a nanozyme platform with highly efficient and stable tandem enzyme characteristics is necessary. Herein, a nanozyme cascade promoting bioplatform based on protein/bimetallic nanoparticles attached to ZIF-derived multilayer N-doped carbon nanosheets is proposed. Due to the carbon-based large surface area and solitary pairs of nitrogen electrons, the metal could be riveted to the carbon-based surface and reduced in situ to nanoparticles. Simultaneously, the addition of BSA has made it possible to establish a biological platform. The obtained BSA-PtAu@CNS has a linear range of 2 × 10–6 to 2 × 10–3 M for H2O2 and apparent dynamic Km of 0.005 × 10–3 M, which shows stronger affinity with H2O2 than HRP. The nanohybrid could adapt to severe reaction environment and enable prominent tandem dual-enzyme activity for glucose sensing. As a result, the cascade nanozyme bioplatform based on BSA-PtAu@CNS is accomplished and provides insights for subsequent biocompatible nanomaterials for use in medical and diagnostic applications.
✓ 已验证
DOI
PubMed
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Jiaqin Liu,Chuanyao Liu,Aisheng Huang
Hydrogen has been regarded as the most promising clean and renewable energy. Beside the production of the hydrogen, the separation of hydrogen is also an import issue before it can be used in fuel cells. Membrane-based separation technologies have gained considerable attentions due to its high efficiency and low energy consumption. Zeolite imidazolate framework (ZIF) membranes have drawn intense interest due to their zeolite-like properties such as permanent porosity, uniform pore size and exceptional thermal and chemical stability. It is rather challenged to prepare well-intergrown Co-based zeolitic imidazolate frameworks (ZIFs) membranes on porous α-Al 2 O 3 tubes since Co-based ZIFs prefer to form crystals in the synthesis solution rather than grow as membrane layer on the support surface. In this work, we report the preparation of high-quality ZIF-9 membrane with high H 2 /CO 2 selectivity and excellent thermal stability by using 3-aminopropyltriethoxysilane (APTES) as a covalent linker to modify the α-Al 2 O 3 tube. Due to the formation of covalent bonds between APTES and ZIF-9, ZIF-9 nutrients are bound to the support surface, thus promoting the growth of dense and phase-pure ZIF-9 membrane with a thin thickness of about 4.0 μm. The gas separation performances of the ZIF-9 membrane were evaluated by single gas permeation and mixture gas separation of H 2 /CO 2 , H 2 /N 2 and H 2 /CH 4 , respectively. The mixture separation factors of H 2 /CO 2 , H 2 /CH 4 , and H 2 /N 2 of the ZIF-9 membrane are 21.5, 8.2 and 14.7, respectively, which by far exceeds corresponding Knudsen coefficients. Moreover, the as-prepared ZIF-9 membrane exhibits excellent stability at a relatively broad range of operating temperature, which is beneficial for the industrial application of hydrogen separation or further membrane reactor .
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Li Yu,Wang Dan,Xu Guanchen,Qiao Li,Li Yong,Gong Hongyu,Shi Lei,Li Dongwei,Gao Meng,Liu Guoran,Zhang Jingjing,Wei Wenhui,Zhang Xingshuang,Liang Xiu
Air and water pollution poses a serious threat to public health and the ecological environment worldwide. Particulate matter (PM) is the major air pollutant, and its primary sources are processes that require high temperatures, such as fossil fuel combustion and vehicle exhaust. PM0.3 can penetrate and seriously harm the bronchi of the lungs, but it is difficult to remove PM0.3 due to its small size. Therefore, PM0.3 air filters that are highly efficient and resistant to high temperatures must be developed. Polyimide (PI) is an excellent polymer with a high temperature resistance and a good mechanical property. Air filters made from PI nanofibers have a high PM removal efficiency and a low air flow resistance. Herein, zeolitic imidazolate framework-8 (ZIF-8) was used to modify PI nanofibers to fabricate air filters with a high specific surface area and filtration efficiency. Compared with traditional PI membranes, the ZIF-8/PI multifunction nanofiber membranes achieved super-high filtration efficiency for ultrafine particles (PM0.3, 100%), and the pressure drop was only 63 Pa. The filtration mechanism of performance improvement caused by the introduction of ZIF-8/PI nanofiber membrane is explored. Moreover, the ZIF-8/PI nanofiber membranes exhibited excellent thermal stability (300 C) and efficient water–oil separation ability (99.85%).
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Fugang Xu,Wenjuan Shang,Mengren Xuan,Guangran Ma,Zixiang Ben
A SERS substrate FP/Ag/ZIF-8 composed of filter paper (FP), silver nanoparticles (AgNPs) and zeolitic imidazolate framework (ZIF-8) film arranged in a layered structure was developed for sensitive detection of pesticide thiram in various samples. Roles of these components in analyte adsorption and Raman signal enhancement were studied using a pesticide intermediate 4-Aminothiophenol (4-ATP) as the probe. The substrate showed high adsorption and optimized SERS response with thick metal organic framework (MOF) coating (125 nm), which is different from previous reported plasmonic particle-MOF composite substrate, where thinnest MOF coating produced the strongest SERS signal. Detection limit for 4-ATP improved 1000-fold on FP/Ag/ZIF-8 (3 pM) compared with that on FP/Ag (3 nM). Importantly, the FP/Ag/ZIF-8 with porous and flexible property can efficiently capture pesticide thiram in different real samples using soaking, filtration or swabbing operation. The subsequent SERS detection of thiram showed advantages of low detection limit (soaking, LOD: 0.04 nM in lake water), fast detection (filtration, within 1 min in peach juice) and suitable for curve surface analysis (swabbing, LOD: 0.1 ng/cm 2 on apple peel), respectively. The substrate also displayed good reproducibility, high stability and size-selective response for thiram detection. Such a layered plasmonic particle/MOF hybrid may hold great promise for toxicant analysis in environment and food.
✓ 已验证
DOI
高影响因子
CARBON
·
2020
·
IF 8.821
Hongyu Gong,Xiangjun Zheng,Kai Zeng,Bo Yang,Xiu Liang,Le Li,Yuanyuan Tao,Ruizhi Yang
Developing non-noble oxygen electrocatalyst is of great importance in multiple energy conversion and storage technologies, for instance, metal-air battery , fuel cell and water electrolysis . Here, we report a bifunctional oxygen electrocatalyst derived from Ni–Fe dual-metal zeolitic imidazole frameworks, Ni 3 Fe nanoalloys embedded in N-doped carbon (Ni 3 Fe/N–C) containing carbon nanotube and porous carbon , which exhibits superior oxygen reduction and evolution reaction electrocatalytic performance. For oxygen reduction reaction , the onset potential and the half-wave potential of Ni 3 Fe/N–C are 0.92 V and 0.85 V, respectively, which are well consistent with those of commercial Pt/C. For oxygen evolution reaction , a low overpotential of 330 mV at 10 mA cm −2 is obtained for Ni 3 Fe/N–C, prominently better than that of commercial RuO 2 /C. Moreover, the oxygen reduction and evolution stability of Ni 3 Fe/N–C distinctly overmatches that of commercial Pt/C and RuO 2 /C. Benefiting from the favorable electrocatalytic activity and stability, the rechargeable Zn–air battery based on Ni 3 Fe/N–C exhibits smaller voltage gap (∼0.8 V) than the one based on commercial Pt/C and RuO 2 /C, and remarkable stability during 300-cycle discharge-charge test. The excellent performance can be attributed to the interaction between Ni 3 Fe nanoalloy and N-doped carbon, the unique nanostructure composed of carbon nanotube and porous carbons, and high graphitization degree.
✓ 已验证
DOI
高影响因子
JOURNAL OF CLUSTER SCIENCE
·
2024
·
IF 2.7
Luo Honghuan,Chen Menglan,Song Fangxiang,Cai Xiaoqin,Yan Yibing,Li Tingxian,Songye Li,Li Yan
Zeolitic imidazolate framework-8 (ZIF-8) is a promising material for drug delivery, but its poor stability limits its wide application. In this work, homogeneous dodecahedral ZIF-8 was prepared by the room-temperature solution stirring method, and to improve the stability of ZIF-8, ZIF-8@mSiO 2 and DZIF-8 (ZIF-8 after calcination) @PMO composites with the core-shell structure were obtained using mesoporous silica (mSiO 2 ) and periodic mesoporous organic silica (PMO) coatings. Folic acid-coupled chitosan (CS-FA) was modified on nanoparticles, and curcumin (CUR) was used as a model anti-tumor drug to obtain the drug delivery systems with targeting and pH stimulation response: ZIF-8@mSiO 2 @CUR@CS-FA and DZIF-8@PMO@CUR@CS-FA, which exhibited good dispersion and high drug loading capability. In addition, we used the MTT assay to assess the cytotoxicity of the drug-carrying systems and selected human cervical cancer cells (Hela) as model cells. The results of the in vitro experiments suggested that the final CUR-loaded drug delivery systems had significantly increased anticancer efficiency compared with the free drug CUR, which improved the therapeutic effect of the hydrophobic CUR on tumors. In conclusion, the pH-responsive nanocarriers provided potential for the targeted delivery of anticancer medication, resulting in a platform for drug-controlled release and cancer therapy.
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 12
·847
·
IF 5.3
Ma Haibo,Ru Changhai,Zhang Fanghao,Hoettges Kai,Zhu Junhui,Song Pengfei
ZIF-8-core/Au-shell (ZIF-8@Au) nanoparticles were fabricated through a two-step strategy involving thiol-modification of ZIF-8 substrates and subsequent Au shell growth via seed-mediated approach, and the ZIF-8@Au nanoparticles were applied to the screening of clostridium difficile infection (CDI). Through regulating dosage of thiol-modifier, we established a surface functionalization protocol that introduced tunable thiol groups onto ZIF-8 particles while preserving their pristine morphology and crystallinity. Subsequent refinement of Au coating parameters enabled the construction of ZIF-8@Au core–shell nanostructures via seed-mediated growth. The resulting ZIF-8@Au nanoparticles were successfully applied to detect biomarkers of CDI, including toxin A, toxin B, and glutamate dehydrogenase (GDH), with sensitivities of 7 pg/mL, 115 pg/mL, and 27 pg/mL, respectively. These results demonstrate the promising potential of this nanoparticle-based platform for lateral flow assays. Graphical
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
·
IF 4.7
Lili Gong,Ju Bai,Can Wang,Zhenyuan Li,Linglong Shan
Two-dimensional (2D) metal-organic framework (MOF) nanosheets are promising fillers for gas separation membranes, owing to their high aspect ratios and tunable pore architectures. Realizing their full application potential requires precise control over nanosheet morphology and sizes to optimize membrane performance. This work employs crystal growth kinetics modulation to tailor the morphology and size of ZIF-67-based nanosheets incorporated into mixed matrix membranes (MMMs) targeting superior CO 2 /CH 4 separation. Strategy (i): Adjusting early-stage nucleation kinetics yielded two distinct ZIF-L nanosheet types: disk-like (ZIF-L-I) and leaf-like (ZIF-L-II). ZIF-L-II, synthesized with higher ligand molar ratio, possessed larger lateral dimensions and more favorable pore characteristics, significantly enhancing gas separation. Strategy (ii): Amino-functionalized ionic liquid (IL) was introduced to further modulate the size of ZIF-L-II nanosheets. The IL's amino groups served as capping agents by coordinating preferentially with Co ions, restricting framework extension without altering crystallinity. The ILs loading amount dictated the final nanosheet size, but did not alter their crystalline phase. Critically, the IL also exhibits affinity for CO 2 , augmenting its transport. At 48 % IL addition, the CO 2 permeability of the 10 wt% IL-ZIF-L-II/PI membrane surged from 289 Barrer to 493 Barrer, without significant selectivity loss. The synergistic combination of kinetically-controlled synthesis (yielding larger and leaf-like nanosheets) and IL-mediated size regulation (providing both capping and CO 2 -philic functions) resulted in a 70 % enhancement in CO 2 permeability.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2025
·
IF 4.1
Yaoxia Yang,Fuxing Zhou,Ruirui Zhang,Bolin Xiong,Zhen Yao,Dongfei Sun,Qingtao Wang,Zhiwang Yang
Hydrogen is the most suitable green energy for the current era, and electrolyzing water to produce hydrogen is the most efficient preparation method. The development of efficient oxygen evolution reaction (OER) electrocatalysts is crucial for sustainable energy conversion. In our work, we construct a hierarchical CNFS@NiFe-LDH/NF heterostructure by integrating ZIF-67-derived cobalt sulfide with nickel‑iron layered double hydroxide (LDH) and bimetallic sulfides on nickel foam (NF). This composite synergistically combines the high surface area and active sites from the MOF-derived sulfide, the tunable layered structure and abundant -OH groups from the LDH-which facilitate OH − adsorption and O O formation-as well as electronic modulation effects from the bimetallic sulfides. The catalyst exhibits excellent OER performance with an overpotential of 236 mV at 10 mA cm −2 and a Tafel slope of 42.23 mV dec −1 under alkaline conditions, and maintains high conductivity and low charge transfer resistance throughout operation. Meanwhile, the catalyst showed excellent stability for at least 66 h during the OER process at 50 mA cm −2 , which demonstrates outstanding durability. Moreover, this catalyst have satisfactory hydrophilicity/aerophobicity. This work provides an effective strategy for designing high-performance and stable electrocatalysts via heterogeneous interface engineering.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Jianzhong Ma,Chongxin An,Lei Zhang
In this work, we synthesized an acid-responsive zinc metal–organic framework (ZIF-8) at room temperature by a solvent method, which can not only be used as an antibacterial by releasing zinc ions but also as a carrier for antibacterial material encapsulation. Subsequently, the broad-spectrum antibacterial triclosan (TCS) was encapsulated in ZIF-8 by the impregnation method, and a long-term antibacterial and antimildew material with slow-release effect TCS@ZIF-8 was synthesized successfully. The encapsulation rate and drug loading rate of TCS@ZIF-8 prepared by adjusting the mass ratio of ZIF-8 and TCS were 71.9 and 25.1%, respectively. Further, TCS@ZIF-8 was introduced into polyacrylate (PA) emulsion, and PA/TCS@ZIF-8 nanocomposite emulsion was prepared successfully by the physical blending method. When the pH of the coating surface became slightly acidic due to the metabolic byproducts of microbial growth, ZIF-8 in PA/TCS@ZIF-8 disintegrated to release Zn2+ and TCS, which can effectively kill bacteria and mold. When the dosage of TCS was 4.0 wt %, the antibacterial rate of the PA/TCS@ZIF-8 nanocomposite film against Escherichia coli and S. aureus was 100 and 97.3%, respectively. Finally, PA/TCS@ZIF-8 nanocomposite emulsion-coated leather was prepared by the spraying method. Compared with the control group that did not use ZIF-8-encapsulated TCS, PA/TCS@ZIF-8 nanocomposite emulsion-coated leather not only showed better antibacterial and antimildew effects but also showed long-term antibacterial and antimildew performance even after being treated under hot and humid environments of 90% humidity and 40 °C for 30 days. Overall, this study not only provides theoretical guidance into the preparation of long-term antibacterial and antimildew coatings for leather but also has great application prospects in paper, clothing, furniture, and other fields, which has great significance in protecting consumers from the invasion of bacteria and mildew.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Liang Ma,Meng Zhang,Zengyan Wei,Xiangyu Meng,Rongfeng Chen,Meixi Qin,Lin Zhu,Yaming Wang,Xiaoxiao Huang,Ming Feng,Peigang He,Dechang Jia,Yu Zhou,Xiaoming Duan
Efficient oxygen evolution reaction (OER) electrocatalysts with non-noble metals are very important for the large-scale application of electrocatalytic hydrogen production systems. ZIF-67 as a promising precursor to prepare Co-based catalysts suffer from its poor conductivities and low intrinsic catalytic activities. In this study, we developed a Co 3 O 4 /CeO 2 /C heterostructure nanoflowers (CoCe/C HFs) catalyst with two-dimension (2D) nanostructures using a facile one step hydrothermal reaction. This method is both energy-efficient and environmentally friendly. Hierarchical three-dimensional (3D) nanoflower structure increased active metal sites enhanced the electronic conductivity. The synthesized Co 10 Ce 1 /C HFs (the molar ratio of Co:Ce = 10:1) display excellent OER activities with a low overpotential of 274 mV and small Tafel slope (82.6 mV dec −1 ) in 1 M KOH. This performance surpasses that of both monometallic Co 3 O 4 /C and the commercial RuO 2 catalysts. Electrochemical tests, X-ray photoelectron spectroscopy, and density functional theory (DFT) calculations results indicate that the superior OER performance of Co 10 Ce 1 /C HFs is attributed to optimized electronic structure of Co 3 O 4 , and the improved conductivities and the cooperative effects between Co 3 O 4 and CeO 2 interfaces.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Yang Chen,Chengyin Yang,Xiaoqing Wang,Jiangfeng Yang,Jinping Li
Solvent-evaporated conversion (SEC) and steam-assisted conversion (SAC) have been developed to prepare the typical metal-organic frameworks (MOFs) Cu-BTC (HKUST-1) and ZIF-8 using a unique solvent recovery strategy using zeolite. As a green circulation medium, zeolite Na-4A loading and removal of solvent (H 2 O and EtOH) can transport solvent in the vapor phase and avoid solvent condensation, which was the defect in previous SAC syntheses of MOFs, and achieves efficient solvent recovery as well as being an economical and green synthetic process. Moreover, SEC and SAC processes exhibited different mechanisms during the multi-stage reaction and solid diffusion reaction, respectively and both can synthesize the desired products in 12 h. These two methods for MOFs preparation were characterized in detail using XRD, SEM and N 2 adsorption during the different growing stages. According to polar molecules (H 2 O and EtOH) steam-assisted in those synthesis, polar destruction molecules (H 2 O, NH 3 ) adsorption and stability of Cu-BTC and ZIF-8 was investigated.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）