JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Shuhao Li,Feng Wang,Zongli Xie,Derrick Ng,Boxiong Shen
Zeolitic imidazolate framework-8 (ZIF-8) based catalysts are considered as promising candidates for the selective catalytic reduction of NO by CO (CO-SCR) reaction due to their large specific surface area. However, the structure of ZIF-8 will be damaged during the synthesis procedure of the catalyst, leading to a decrease in their physical properties, which in turn affects the catalytic performance of the catalyst. Herein, a CeO 2 -ZIF-8 core-shell structure was synthesized and doped with Fe, resulting in the formation of Fe@CeO 2 -ZIF-8, for CO-SCR reaction. Characterization results show that the Fe@CeO 2 -ZIF-8 core-shell catalyst has better morphology, thermal stability, and higher specific surface area than the FeCe co-impregnated ZIF-8 catalyst (FeCe@ZIF-8 (IM)). Moreover, the reducibility of the reactive Fe species in the Fe@CeO 2 -ZIF-8 core-shell catalyst is also enhanced. As a result, the Fe@CeO 2 -ZIF-8 core-shell catalyst exhibited higher low-temperature CO-SCR catalytic activity with its NO conversion reaching 99% at 250 °C versus the FeCe@ZIF-8 (IM) catalyst (89% at 250 °C). The experimental results were further verified by density functional theory (DFT) calculations including Electron Localization Function (ELF), Valence Charge Density Difference (VCDD), Projected Density of States (PDOS) and Bader charge analyses. The calculation results revealed that the core-shell configured Fe@CeO 2 -ZIF-8 catalyst has a stronger active metal-support charge transfer and better capacity for the adsorption of the reactants. The reaction mechanism over Fe@CeO 2 -ZIF-8 core-shell catalyst was investigated via in situ DRIFTS experiments, and results showed that the nitro compounds and formate species are critical intermediates in this reaction at a higher temperature range (300–350 °C). This work provides a new strategy for the synthesis of ZIF-8 based catalysts with better properties for CO-SCR reaction.
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JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Yang Li,Xu Zhang,Asan Yang,Chunyue Jiang,Guoliang Zhang,Jingwen Mao,Qin Meng
Multi-layer graphene oxide (GO) membranes show great perspective in vast fields due to special two-dimensional structure. However, pure GO membranes generally face main obstacles of low flux, weak interlayer interaction and poor stability, which hinder their wide application in separation. Introduction of nano-porous crystals into interlayer of GO nanosheets to form 3D/2D structure is a potential strategy to overcome these issues. In this study, novel polyphenol etched hollow MOF/GO composite membrane was first synthesized employing modified hollow metal organic frameworks with strong hydrophilicity and hollow structure by one-step etching-aided cross-linking method. MOF nanoparticles with hollow structure expanded interlayer spacing of GO nanosheets and brought about formation of additional water channels, significantly reducing water transfer resistance. Meanwhile, nano-porous crystal MOFs modified by phenolic materials were able to cross-link adjacent GO nanosheets via π–π interfacial interactions to achieve stable structure and increase anti-swelling property of membranes. The pores with abundant hydroxyl groups provided strong free energy barrier for ions at medium and low concentrations of ionic strength , therefore not only greatly improved membrane permeaselectivity, but also enhanced anti-fouling performance. The prepared eZIF-8/GO nanofiltration membrane exhibited excellent permeate flux of 16.4 L m −2 h −1 bar −1 , 382% higher than pure GO membrane, and competitive Na 2 SO 4 rejection of 86.3%. By simply adjusting GO loading to further reduce membrane thickness, the permeate flux reached up to 45.4 L m −2 h −1 bar −1 with high rejection more than 99% for organic molecules. These results indicate that novel MOF/GO composite membranes have broad application prospects in desalination and water treatment.
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MATERIALS LETTERS
·
2023
·
IF 3
Xiang Wang,Jiahui Zhang,Jiaxin Jiang,Gaofeng Zheng,Wenwang Li
Bead-like PAN/ZIF-8 nanofiber membranes, of which the commercial ZIF-8 nanoparticles attached to the surface of PAN nanofibers, were prepared by a simple one-step electrospinning method. The fiber structures, electrospinning parameters and adsorption capacity to methyl blue were investigated. ZIF-8 distributed uniformly on the nanofiber, and the adsorption process followed the pseudo-second-order kinetics. Maximum adsorption capacity was obtained as 224.37 mg/g at ZIF-8 concentration of 10 wt%, methyl blue concentration of 100 mg/L, and time of 180 min. Our work provides a simple, cost-effective process for the fabrication of MOFs nanofiber membranes with good adsorption capacity that suitable for practical commercial applications.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2013
·Vol. 19
·期 40
·13484-13491
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IF 5.831
Yan-Yan Fu,Cheng-Xiong Yang,Xiu-Ping Yan
The unique features of high porosity, shape selectivity, and multiple active sites make metal–organic frameworks (MOFs) promising as novel stationary phases for high-performance liquid chromatography (HPLC). However, the wide particle size distribution and irregular shape of conventional MOFs lead to lower column efficiency of such MOF-packed columns. Herein, the fabrication of monodisperse MOF@SiO 2 core–shell microspheres as the stationary phase for HPLC to overcome the above-mentioned problems is reported. Zeolitic imidazolate framework 8 (ZIF-8) was used as an example of MOFs due to its permanent porosity, uniform pore size, and exceptional chemical stability. Unique carboxyl-modified silica spheres were used as the support to grow the ZIF-8 shell. The fabricated monodisperse ZIF-8@SiO 2 packed columns (5 cm long × 4.6 mm i.d.) show high column efficiency (23 000 plates m −1 for bisphenol A) for the HPLC separation of endocrine-disrupting chemicals (bisphenol A, β-estradiol, and p -( tert -octyl)phenol) and pesticides (thiamethoxam, hexaflumuron, chlorantraniliprole, and pymetrozine) within 7 min with good relative standard deviations for 11 replicate separations of the analytes (0.01–0.39, 0.65–1.7, 0.70–1.3, and 0.17–0.91 % for retention time, peak area, peak height, and half peak width, respectively). The ZIF-8@SiO 2 microspheres combine the advantages of the good column packing properties of the uniform monodisperse silica microspheres and the separation ability of the ZIF-8 crystals. Graphical Core strength : Monodisperse ZIF-8@SiO 2 (ZIF-8=zeolitic imidazolate framework 8) core–shell microspheres have been fabricated through controllable growth of a ZIF-8 shell on spherical carboxylate-terminated SiO 2 cores (see figure). The metal–organic framework material is suitable as a stationary phase for fast and highly efficient HPLC separation.
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DYES AND PIGMENTS
·
2022
·
IF 5.122
Jichun Wu,Jia Zhai,Binbin Wang,Wenjing Ding,Rui Ding,Ke Li,Sohail Muhammad,Xing Zhang,Peng He,Baoxing Shen
Hypoxia is one of the common characteristics in tumor cells. It has been confirmed that the nitro reductase (NTR) overexpression is closely related to hypoxia cells. Thus, developing a facile method to detect nitro reductase is of great significance. Although several detection techniques have been designed for the NTR, these probes still have limitations, such as low sensitivity, poor water solubility, and compromised biocompatibility. In this study, we developed a nanocomposite (Nitro-BOD@ZIF-8) based on BODIPY fluorophore and zeolitic imidazolate framework-8 (ZIF-8). A red emission BODIPY small molecule probe (Nitro-BOD) was synthesized and then encapsulated in ZIF-8. Morpholine and nitro groups were introduced to Nitro-BOD for lysosome localization and NTR detection, respectively. The results showed that reduction of the nitro group on the probe by NTR blocked the photoinduced electron transfer (PET), resulting in fluorescence enhancement. The low detection limit for the NTR proved the sensitivity of the sensor. In addition, confocal microscopy con-firmed the fluorescence imaging feature of the Nitro-BOD@ZIF-8 for NTR in A549 cells. This work also opens a useful path for probe and MOF in the field of enzyme detection.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Peng Zhang,Junyou Chen,Lingfei Feng,Mingchi Jiang,Bin Xu
Silicon (Si) shows great potential for lithium-ion batteries (LIBs) due to its high theoretical capacity and low working potential. However, its intrinsic low electronic conductivity and large volume expansion during lithiation result in dramatic capacity fading and poor rate capability. Herein, a dual-confinement strategy is proposed for improving the lithium storage properties of Si by uniformly anchoring Si nanoparticles within a MXene/ZIF-8 derived carbon framework. In the Si/MXene@C composite, Si nanoparticles tightly bond with MXene and carbon through the formed interfacial Si–O–Ti and Si–C bonds, respectively, which is beneficial for alleviating the volume expansion of Si and promoting the interfacial charge transfer. Therefore, the Si/MXene@C composite exhibits excellent lithium storage performances in terms of high capacity (1006.1 mAh g–1 at 100 mA g–1), stable cycle performance (862.9 mAh g–1 after 150 cycles at 100 mA g–1), and superior rate capability (233.3 mAh g–1 at 5 A g–1), indicating its promising potential as an anode material for next-generation high-performance LIBs.
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高影响因子
International Journal of Pharmaceutics-X
·
2025
·
IF 6.4
Zhenyu Xiang,Jialing Liu,Yan Zhang,Ru Shen,Ying Lu,Rong Li,Qinying Shi,Guannan Zhang,Sijin Li,Jianbo Song
Triple-negative breast cancer (TNBC), a highly refractory malignancy characterized by aggressive clinical behavior, poses a significant therapeutic challenge due to its resistance to conventional treatments. While microwave thermal therapy (MWTT) emerges as a promising modality for TNBC treatment through deep-tissue penetration and uniform energy delivery, its reliance on prolonged hyperthermia exposure risks collateral damage to adjacent healthy tissues. Herein, we present a rationally engineered iron-doped zeolitic imidazolate framework-8 nanoplatform (Fe@Zif-8). This study aimed to develop a theranostic agent for MRI-guided combination therapy by pursuing the following objectives: (1) synthesizing and characterizing Fe-doped ZIF-8; (2) evaluating the enhancement of microwave thermal conversion efficiency via iron doping; (3) validating the nanoparticle's Fenton catalytic activity for reactive oxygen species (ROS) generation and glutathione depletion in the tumor microenvironment; and (4) demonstrating the synergistic antitumor efficacy of combined MWTT and CDT both in vitro and in vivo . Accordingly, Fe@Zif-8 was synthesized via a one-pot solvothermal method and systematically characterized. Its therapeutic performance was then rigorously assessed through a series of physicochemical and biological experiments. The iron dopants substantially enhance microwave absorption and dielectric loss effects in Zif-8 matrices, enabling Fe@Zif-8 to generate intensified hyperthermia under MW irradiation. Concurrently, iron ions released from the nanoplatform react with endogenous hydrogen peroxide (H 2 O 2 ) via Fenton catalysis to produce substantial ROS. The concerted action of MWTT and CDT achieves rapid tumor ablation while significantly reducing therapeutic energy requirements. Furthermore, the platform served as an effective T2 contrast agent for magnetic resonance imaging (MRI), enabling non-invasive monitoring. This work provides a new approach for the preparation of nanomaterials with highly efficient anti-TNBC performance.
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DOI
PubMed
高影响因子
Food Bioscience
·
2026
·
IF 6.2
Ming Zhou,Jun Cheng,Shunqian Zhuang,Songting Chen,Yingying Sun,Jiang Xu,Yunfei Xie
The residue of acetamiprid (AAP) in agricultural products poses a threat to food safety. Traditional Surface-enhanced Raman scattering (SERS) detection faces issues such as complex and expensive substrate preparation, and the difficulty of effectively utilizing SERS hotspots due to random molecular diffusion at low concentrations, resulting in low detection sensitivity. Here, we introduced the highly adsorptive 2-Methylimidazole zinc salt (ZIF-8) and developed a portable, ultra-sensitive silver nanoparticle filter paper (FP) loaded with 2-Methylimidazole zinc salt (Ag@FP@ZIF-8) substrate. It was found that the enhancement factor (EF) value for Rhodamine 6G (R6G) when measured using a handheld Raman spectrometer was 1.401 × 10 13 . More importantly, after being kept in a sealed and dark environment at room temperature for 45 days, the signal retention rate remained at 92%. Additionally, it exhibits good uniformity, as evidenced by a relative standard deviation of less than 8.5%. Combining a handheld Raman spectrometer with the previously proposed capillary-assisted sampling method has enabled AAP to be extracted from apple, pear and Bok choy leaves in a shoNeed file 22165rt period of time. The detection limit for Bok choy is 0.01 mg/kg, meeting the requirements of the EU Commission's regulation (EU) 2025/158. This method is expected to be developed into a rapid, deployable solution for on-site pesticide screening.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Shanle Zhang,Yunjie Sun,Zhipeng Xu,Yani He,Xiaodi He,Yue Zhang
The integration of inhibitor-encapsulated nanocontainers within organic coatings offers a viable approach for achieving sustained corrosion mitigation and extended protective functionality. In this study, a ZIF-8@LDH-P (ZLP) nanocontainer was developed, consisting of Ni-Co layered double hydroxide (LDH) derived from zeolitic imidazolate framework-8 (ZIF-8) precursors and incorporating trisodium phosphate (TSP) as a corrosion inhibitor. The release of phosphate ions from ZLP exhibited pH-responsive behavior, enabling triggered inhibitor release under corrosive conditions. When uniformly dispersed in the polyvinyl butyral (PVB) resin matrix and coated on Q235 carbon steel, the PVB/ZLP composite coating demonstrated an enhancement of two orders of magnitude in low-frequency impedance modulus (|Z| 0.01 Hz ) relative to pure PVB. Furthermore, the PVB/ZLP coating exhibited long-term protective capabilities, ascribed to the cooperative effect of regulated phosphate ions release for active corrosion inhibition, chloride ion entrapment by LDH interlayers, and the prolonged diffusion pathways for corrosive agents enabled by the lamellar structure of LDH. This study offers novel design strategies for ZIF-derived LDH nanocontainer-based anti-corrosion coatings with inhibitor loading.
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高影响因子
MATERIALS & DESIGN
·
2026
·
IF 7.9
XinYu Mao,ShangNong Wu,MengHui Zhang,Peng Shen,XiaoZhong Yang,HongGang Wang
Colorectal cancer (CRC), a leading cause of cancer-related mortality, remains challenging due to drug resistance, insufficient targeting, and systemic toxicity. We engineered a pH/glucose dual-responsive zeolitic imidazolate framework-8 (ZIF-8) nanocarrier for the co-delivery of berberine (BBR) and glucose oxidase (GO X ). BBR and GO X were encapsulated into ZIF-8 nanoparticles via one-pot synthesis and subsequent surface modification with polyethylene glycol–folic acid (PEG–FA), yielding BBR@GO X @ZIF-8–FA (BGZF). At pH 5.4, BBR and GO X release was approximately 74% and 69%, respectively. Cellular uptake and JC-1 assays revealed that the delocalized positive charge of the nanoparticles enhanced mitochondrial targeting, synergizing with GO X -mediated glucose depletion for amplified starvation therapy. Reactive oxygen species (ROS) quantification showed that BBR and GO X synergistically exacerbated oxidative stress, resulting in higher levels of ROS than those observed with monotherapy. Mechanistically, BGZF induced apoptosis through dual pathways: endogenous mitochondrial dysfunction and exogenous ROS overproduction. BGZF’s tumor-specific targeting capabilities were validated in vivo , demonstrating FA-mediated active homing and prolonged biosafety with negligible systemic toxicity. This research pioneers a dual-responsive nanoplatform that integrates mitochondrial targeting and cascade catalytic amplification to achieve synergistic antitumor effects between BBR and GO X , offering a novel paradigm for CRC treatment.
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高影响因子
IONICS
·
2018
·Vol. 25
·期 6
·2595-2605
·
IF 2.347
Zhang Min,Ma Xiaoyan,Liu Yi,Ma Jingyu,Chen Fang,Zhang Qi
Polyhedral oligomeric silsesquioxane-poly(methyl methacrylate) 8 (POSS-PMMA 8 )/polyvinylidene fluoride (PVDF) hybrid gel polymer electrolyte (HGPE) membranes have been fabricated by using electrospinning along with the use of commercial polypropylene (PP) microporous membranes as its support; the corresponding HGPEs were obtained after being activated into liquid electrolytes. The goal of the study is to incorporate the high mechanical property of microporous PP membrane and superior electrochemical performance of electrospun gel polymer electrolyte to get the high-performance electrolyte for Li-ion battery. As an effective modifier, it is found that the introduction of POSS-polymer plays a vital role in enhancing many properties of HGPEs, and the influence of POSS-(PMMA 46 ) 8 content on overall properties of HGPEs is investigated. In specific, the HGPEs membrane with 12 wt% POSS-(PMMA 46 ) 8 displays a significant uniform fiber diameter with 720 nm and high electrolyte uptake of 322% due to the high porosity of 58%. Meanwhile, a great improvement in mechanical property is obtained with a tensile strength of 34.5 MPa, which is about 7 times of POSS-(PMMA 46 ) 8 /PVDF membrane without support. The interfacial resistance between the corresponding HGPEs and Li electrodes is significantly reduced and as low as 138 Ω. Furthermore, the LiFePO 4 /HGPEs/Li button cell is assembled and excellent cyclability is shown at 0.1 C and 0.5 C, respectively. The results demonstrate that POSS-(PMMA 46 ) 8 /PVDF HGPEs could be applied as a promising HGPE candidate for high-performance Li-ion batteries.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Zhuxuan Lin,Ying Qian,Zequn Li,Han Zhang,Guangyao Li,Song Li,Meiling Chen,Jeonghun Kim,Wenkai Zhu
Formaldehyde as a common indoor volatile organic compound (VOC) poses serious health risks to humans. Therefore, developing efficient formaldehyde adsorbents is essential for improving indoor air quality. Recently, zeolitic imidazolate framework (ZIF)-based adsorbents have attracted significant attention due to their high efficiency in formaldehyde removal. In this work, cellulose nanofiber (CNF) was used as biomass templates to in situ grow ZIF-8, forming a ZIF-8@CNF filter with enhanced adsorption capacity. The physical–chemical properties of ZIF-8@CNF were investigated using SEM, XRD, FTIR and XPS. The results demonstrate that the successful self-assembly of ZIF-8 crystals onto CNF results in a ZIF-8@CNF filter with a high specific surface area and abundant pore structures. Meanwhile, the ZIF-8@CNF filter demonstrated remarkable formaldehyde adsorption capacity, and achieved 88.32% removal of formaldehyde within 6 h. Additionally, the filter maintains stable structural integrity while retaining over 70% of the formaldehyde adsorption capacity after undergoing five adsorption–desorption cycles, demonstrating outstanding reusability. Furthermore, the adsorption of formaldehyde by the ZIF-8@CNF filter relies on its internal layered porous structure and noncovalent interactions with formaldehyde molecules. Therefore, the as-prepared ZIF-8@CNF filter offers an effective solution for indoor formaldehyde removal.
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高影响因子
危险品化学品经营许可证（带存储）