JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Xiaoke Wu,Yanwei Yang,Xiaofei Lu,Zhengbao Wang
The preparation of thin metal-organic framework (MOF) membranes by seeded secondary growth method is still a challenge. In this study, relatively thin ZIF-8 membranes with high gas separation performance on alumina hollow fibers are prepared in autoclaves with thick-walled Teflon-liners by the seeded secondary growth method under the modulation of sodium formate. The ZIF-8 membrane thickness can be greatly decreased and the cracks in the membrane layer can be avoided by using thick-walled Teflon-liner (e.g., 7.5 mm) during secondary growth mainly due to the slow heating and cooling of the synthesis solution, which can control the nucleation rate and growth rate of crystals, leading to an appropriate membrane formation rate. A certain amount of sodium formate can introduce ZnO particles in the seed layer to improve the formation of dense ZIF-8 membrane layer and control the growth rate of membrane layer. The suitable amount of sodium formate and thick-walled Teflon-liner are crucial in ensuring the well-intergrowth of relatively thin ZIF-8 membranes. Owing to reduced grain boundary defects, the prepared ZIF-8 membranes show an ideal H 2 /N 2 separation selectivity of 30.9 ± 1.8, which is at least twice the highest value reported in the literature under similar separation conditions.
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DOI
高影响因子
NANO
·
2022
·
IF 1.438
Wan Gao,Yanliang Li,Wuming Xie,Jianzhi Huang,Lei Li,Zhixin Qiu
Antibiotics are a class of organic pollutant in the medical field for hundreds of years. Due to the continuous discharge of antibiotics in the environment, the phenomenon of pseudo-persistence of antibiotics is produced. Therefore, it is necessary to develop an advanced sustainable technology to remove antibiotics from water resources. In this study, Zeolite Imidazole Framework-8 (ZIF-8) was prepared by a simple and rapid method. Oxytetracycline (OTC) degradation was performed using ZIF-8 as a photocatalyst under visible light (VL) (500 W xenon lamp) irradiation. Under different experimental conditions, ZIF-8 has strong catalytic removal performance for OTC. When the reaction conditions are: OTC concentration of 80 mg L − 1 , ZIF-8 concentration of 1.0 g L − 1 , pH 5.96, the OTC removal rate is more than 90%. Through the detection and analysis of degradation intermediates, the possible degradation pathway of OTC was proposed. This study showed that the OTC removal rate of ZIF-8 could still reach 69% after four times of recycling. The results showed that the ZIF-8/VL system had high OTC removal efficiency and good recyclability.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2021
·
IF 6.558
Sujuan Hu,Yongqi Wei,Jiao Wang,Yingjian Yu
Electroanalysis is an effective monitoring method for organic pollution in environmental samples. However, chemical fouling with the formation of non-conductive fouled films easily occurs on the surface of the electrode during organic pollution detection that would inactivate the electrode and affect the detecting sensitivity of organic pollution. In this work, we found that zeolitic imidazolate framework-8 (ZIF-8) electrode can achieve effective degradation of non-conductive fouled films under the light illumination during electrochemical detection of some typical organic pollution (sulfamethoxazole (SMX), Bisphenol A (BPA) and diclofenac sodium (DS)). Profiting from the charge transfer capability and photoelectric characteristics, ZIF-8 electrode exhibits a lower detection limitation for organic pollution detection and superior regeneration property. The nice detection and superior regenerated property are mainly due to non-selective superoxide radical (·O 2 − ) and hydroxyl radicals (·OH) mediation produced by ZIF-8 electrode under light illumination that can mineralize anodic fouled products and resume surface reactive sites. Compared with the single electrochemical determination, photo-assisted electroanalysis provides a stable monitoring and a renewable pathway for practical applications.
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高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Yunqing Lu,Mengmeng Li,Yu Feng,Yuexin Xu,Yongqiang Zhou,Ji Xu,Jin Wang
Optical properties are the most significant properties of optical thin films, which determine its application in optical and photoelectric devices. Designable optical properties are the most challenging goals in optical material engineering. Recently, Metal-organic framework (MOF)-based optical thin films have attracted increasing attention due to their novel optical properties, especially their modular design, which allows fine-tuning of the relevant properties. In this work, a strategy for tuning the optical properties of MOF-based thin films is developed, which is realized by adjusting MOF crystal morphology. A commonly used MOF, ZIF-8 (zeolitic imidazolate framework-8), is selected as the research model. The morphology of ZIF-8 nanocrystal is adjusted using a surfactant/end-capping agent modulation method. The surfactant/end-capping agents are absorbed onto different crystal planes of ZIF-8, slowing the growth of the crystal planes and causing the formation of ZIF-8 crystals with different morphologies. Six different morphologies of ZIF-8 crystals are successfully synthesized in the presence of different amounts of CTAB and/or TRIS: nano-spherical, rhombohedral dodecahedron, nano-cubic, rough octahedron, flake-shaped and hexapod-like morphology. Then, the corresponding ZIF-8 thin films with different crystal morphologies are prepared via spin-coating. The optical properties of the thin films are investigated using UV–vis spectroscopy and ellipsometry in detail. The results indicate that the film with rough octahedron morphology has the best transmittance, reaching 93.35 % at 581 nm. As a key optical parameter of the film, its refractive index can be adjusted between 1.27 and 1.54. The success of tuning of the optical properties of MOF optical thin films by adjusting the crystal morphology will make it meet the different required optical properties in various optical and photoelectric devices.
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高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Huan Wang,Yuan Bai,XiaoBing Jiang,Min Zeng
Zeolitic imidazole frameworks (ZIFs) create broad platforms to study electrochemical energy storage for their numerous advantages (e.g., their high surface area, hierarchical porous structures and flexibility templates). In the present study, metal-coordinated ZIF-derived Bimetal-Organic Framework exhibiting a well-defined morphology of rhombic dodecahedron was facilely synthesized through the addition of a certain molar ratio Ni 2+ or Mg 2+ when ZIF-67 was being grown. Via pyrolysis, the bimetallic composite materials, i.e., NiCo 2 O 4 @C and MgCo 2 O 4 @C were produced, exhibiting bimetallic active sites, large surface area and conductive carbon frameworks. When acting as the anode materials in lithium-ion batteries, the produced composite materials displayed excellent durability and greater specific capacity. The mentioned excellent electrochemical performances were contributed to by the stable carbon frameworks because of their greater electronic conductivity and higher electrochemical activity. Moreover, the present study presented novel ideas to synthesize the identical type of MOFs materials and can broaden their applications.
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高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 35
·7918-7922
·
IF 4.857
Yichen Zhou,Mingmin Jia,Xiongfei Zhang,Jianfeng Yao
Graphical Filling the voids : Etched ZIF-8 (ZIF-8-E) crystals permeated by open through pores of size about 100 nm have been introduced into a polyethersulfone membrane matrix. The resulting material shows enhanced CO 2 /N 2 separation performance (see scheme). Zeolite ZIF-8 has been etched with acid to form microporous ZIF-8-E crystals. These were then introduced into a polyethersulfone (PES) membrane matrix to enhance its CO 2 /N 2 separation performance. Open through pores of size about 100 nm formed in the ZIF-8 crystals allow the ingrowth of polyethersulfone chains, ensuring a reduction in the number of nonselective voids, thereby achieving better interaction between ZIF-8-E and PES. As a result, the CO 2 /N 2 separation performance of the ZIF-8-E/PES membrane increased significantly, showing a CO 2 permeability of 15.7 Barrer and a CO 2 /N 2 ideal selectivity of 6.5.
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高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2021
·Vol. 25
·期 7
·2065-2074
·
IF 2.647
Chen Jingzhou,Wang Xuan,Feng Wangjun,Zhao Wei,Shi Zhaojiao
Lithium-sulfur batteries have become a potential candidate for a new generation of energy storage devices due to their extremely high theoretical capacity, but their shuttle effect and poor conductivity of sulfur and final discharge products hinder their commercial development. In this paper, ZIF-8 material with a large specific surface area was successfully prepared with metallic zinc as the central atom and dimethylimidazole. After sintering at 800 °C, the mesoporous carbon material was obtained, which increased its physical adsorption of sulfur. At the same time, titanium dioxide was coated on the mesoporous carbon material to obtain a core-shell structure with a specific surface area of up to 556.1 m 2 /g. The titanium dioxide coating well inhibits the occurrence of the shuttle effect and at the same time improves the cycle stability of the lithium-sulfur battery. The specific discharge capacity of the battery reaches 1351 mAh/g at 0.1 C.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 14
·22073-22086
·
IF 0
Wang Youqun,Cai Weiqian,Xiong Lingshan,Pei Jiaying,Zhang Zhibin,Xu Lin,Liu Yunhai,Cao Xiaohong
Inspired by its large specific surface area, and tunable chemical and physical properties, a hollow carbon-based mater8ial derived from ZIF-8 with phosphate groups (HCM-PO 4 ) was prepared for the elimination of U(VI). The structural and surface features of HCM and HCM-PO 4 were thoroughly examined using techniques such as SEM, TEM, and XRD. The resulting carbon material, HCM-PO 4 , exhibits a higher BET surface area of 571.2 m 2 ·g -1 , featuring a hollow structure. The removal procedure of HCM-PO 4 for U(VI) aligns with the quasi-secondary kinetic model. Furthermore, the theoretical sorption capacity of HCM-PO 4 was found to be 482.30 mg·g -1 at 298.15 K. The results obtained from XPS, FT-IR, and EDS analysis of HCM-PO 4 after adsorption revealed the coordination of the phosphate group for U(VI), contributing significantly to the adsorption process. In brief, the HCM-PO 4 demonstrates excellent adsorptive ability, positioning it as a hopeful expectant to remove U(VI) from wastewater.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Danfeng Du,Ke Zhang,Zhisong Han,Zexin Liu,Xiurong Guo
Thermal-insulating and flame-retardant materials, as a class of functional materials with unique properties, play a pivotal role in various fields. The study utilized silica aerogel as the thermal-insulating base material and incorporated ZIF-8-encapsulated polyethylene glycol-based shape-stabilized phase change materials (ZIF-8@PEG) to fabricate silica aerogel-based ZIF-8@PEG composites (ZP-SA) via a sol-gel method. The microstructure, thermal stability, and molecular architecture of the composite phase change materials were characterized through scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The experimental results demonstrated that the prepared ZP-SA exhibited a three-dimensional skeletal structure, with a phase change enthalpy of 80.98 J/g and phase transition temperatures of 53.18 °C (melting) and 26.89 °C (solidification). The material displayed excellent thermal stability during heating-cooling cyclic tests. In terms of flame retardancy, ZP-SA achieved a limiting oxygen index (LOI) value of 30.2 %. These findings confirm that the incorporation of ZIF-8@PEG effectively enhances the thermal-insulating and flame-retardant performance of the composite material. The research provides a novel theoretical framework and practical insight for the design of advanced thermal-insulating and flame-retardant composite materials, demonstrating significant academic and applied value.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xiao Tian,Yajing Zhu,Qi Hong,Zhihao Liu,Ying Li,Meipeng Jian,Haiyan Li
Elastic two-dimensional (2D) metal-organic framework (MOF) nanosheet-based aerogels present a promising architecture for water remediation, yet often suffer from structural fragility and reduced porosity. Herein, we report an elastic 2D ZIF-8/graphene nanosheet aerogel (E-GZNA) synthesized via a facile cross-linking strategy using carboxymethyl cellulose (CMC) as a binder, overcoming the aggregation and recyclability bottlenecks of conventional MOF adsorbents. The resulting hierarchical porous structure of E-GZNA enabled rapid As(III) mass transfer, while CMC enhanced mechanical elasticity, allowing 50% compression for 50 cycles with 80% stress retention. E-GZNA exhibited a maximum As(III) adsorption capacity of 73.6 mg/g, significantly outperforming most macroscopic adsorbents. XPS and FTIR analyses revealed adsorption mechanisms involving Zn-O-As and N-O-As bond formation. DFT further confirmed As(III) adsorption on both sites with comparable adsorption energies. Fixed-bed column experiments further demonstrated effective arsenic removal to below the WHO standard, highlighting its potential for practical water treatment applications. This work advances MOF-based aerogels by integrating elasticity, high adsorption efficiency, and recyclability for sustainable As(III) removal.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zhikun Li,Zhe Zhao,Xi Zhu,Shumin Lin,Jinyu Wang,Shu-Xuan Liang
Fluoroquinolone antibiotics (FQs) are a class of antibiotic pollutants of global concern for water due to their high chemical stability and low biodegradability, leading to long-term residues. In this study, a novel composite material composed of metal-organic framework (MOF) and covalent organic framework (COF), ZIF-8@TpPa-SO 3 H, was designed for the selective adsorption of quinolones and synthesized using ultrasonic method. The adsorption kinetics, isotherms, thermodynamics and influencing factors of ZIF-8@TpPa-SO 3 H towards three FQs, including enoxacin, norfloxacin, and ciprofloxacin, were investigated. Characterized by an abundant pore structure and uniform element distribution, the composite exhibited a specific surface area of 34.25 m²/g and an optimized pore size distribution of 15.72 nm. The adsorption selectivity experiment showed that ZIF-8@TpPa-SO 3 H achieved a removal rate of over 90% for FQs, which was significantly higher than those of other types of antibiotics. The adsorption of FQs on ZIF-8@TpPa-SO 3 H followed the pseudo-second-order kinetic model, and chemisorption was the predominant mechanism. The maximum adsorption capacities for enoxacin, norfloxacin, and ciprofloxacin were 595.4, 566.4, and 568.6 mg/g, respectively. Furthermore, electrostatic interactions and hydrogen bonding were the main adsorption mechanisms. Density functional theory calculations and X-ray photoelectron spectroscopy analysis further confirmed that selective adsorption is synergistically enhanced by electrostatic interactions between piperazine and sulfonic acid groups and C-H⋯π interactions of the FQs. Additionally, the composite maintained a removal rate above 85% after 8 adsorption-desorption cycles, demonstrating its good applicability. It also exhibited satisfactory applicability in treating water samples from different sources. This study provides a theoretical and practical foundation for the development of efficient and recyclable FQ adsorbents.
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高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 6
·e06885
·
IF 2.3
Jianming Wu,Ziqiang Xiang,Yujie Li,Jiaqi Lv,Xiangfang Peng
Microplastic pollution poses a significant threat to ecosystems and human health, necessitating efficient removal methods. In this study, a magnetic nanocomposite, Fe 3 O 4 /PSS/ZIF-67, was synthesized via a solvothermal method, utilizing poly(sodium p-styrenesulfonate) (PSS) to functionalize Fe 3 O 4 nanoparticles for the in situ growth of ZIF-67. Under ultrasound-assisted conditions, the adsorbent exhibited exceptional performance for polystyrene (PS) microplastics, achieving equilibrium within 15 min with a maximum adsorption capacity of 2816 mg/g. The adsorption process followed pseudo-first-order kinetics and the Langmuir isotherm model. Mechanistic analyses revealed that the removal was driven by synergistic effects of van der Waals forces, electrostatic interactions, hydrogen bonding, and π–π interactions. Furthermore, the Fe 3 O 4 /PSS/ZIF-67 demonstrated broad-spectrum removal capabilities for various microplastics (PP, PE, PET, PMMA, PVC, PA), organic dyes (AB 93, MB, MO, CR, CV, MG, R6G), heavy metal ions (Fe 3+ , Ni 2+ , Cu 2+ , Zn 2+ ), and antibiotics (TC, CIP), demonstrating its potential for wastewater treatment.
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DOI
高影响因子
危险品化学品经营许可证（带存储）