MICROCHEMICAL JOURNAL
·
2022
·
IF 5.304
Qingtao Wang,Shounian Cheng,Shufang Ren,Zhixiang Zheng
In this paper, a protocol of the integration of Cu doped porous carbon (Cu C N) and molecularly imprinted polymer (MIP) was proposed to develop a sensitive, selective, and stable electrochemical sensor toward the determination of norfloxacin (NFX). Field-emission scanning electron microscopy and transmission electron microscope, energy dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, Brunauer–Emmett–Teller analysis and thermogravimetric analyzer, cyclic voltammetry, and electrochemical impedance spectroscopy were used to characterize the doping materials and the MIP film. Cu N C porous carbon was prepared by high-temperature carbonizing Cu/ZIF-8 precursor. The doping of Cu into ZIF-8 allows not only enhancing the conductivity for the sensor by giving active sites, but also favors the great porous structure and active surface area by prohibiting the structure collapse of ZIF-8 polyhedron. The MIP layer was prepared by in-situ electrochemical polymerization of dual monomers of dopamine and resorcinol on glassy carbon electrode (GCE) modified by Cu N C. For the electrochemical detecting, the condition of the ratio of two functional monomers, functional monomer to template molecular, the number of electric polymerization cycles, pH, and incubation time were optimized. The proposed MIP/Cu N C/GCE sensor allows the sensitive detecting toward NFX with the linear ranges of 0.01–0.5 and 0.5–100 μM and the limit of detection of 3.33 nM (S/N = 3). In addition, the sensor has good selectivity, repeatability, reproducibility, and stability. In terms of practical application, the sensor is feasible and robust in determination of NFX in the commercially available tablet with the average recovery of 96.72 %–103.88 % and RSD less than 5 %.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Yun Xiong,Niyan Deng,Xiaoyu Wu,Quan Zhang,Shengpeng Liu,Guofeng Sun
The incorporation of attainable amine functionality in zeolitic imidazolate framework-8 (ZIF-8) is utilized to enhance the pervaporation performance for ethanol/ water separation applications. Using 2-aminobenzimidazole, a ligand with NH 2 -functionalized group, displacement of the ZIF-8 original ligand during de novo synthesis while preserving the ZIF-8 initial structure, which produces a novel mixed- linker ZIF material (ZIF-8-NH 2 ) with smaller nanocrystal size, controllable pore size, and enhanced hydrophilicity. A series of different mixed matrix membranes (MMMs) were fabricated by incorporating ZIF-8-NH 2 into poly(vinyl alcohol) (PVA) matrix. Various characterization techniques, such as FTIR, 1 H NMR, XRD, SEM, TGA, and Contact angle etc. were employed to demonstrate the properties of prepared ZIF nanoparticles and the MMMs. The results indicated that ZIF-8-NH 2 and the MMMs were perfectly fabricated, which were attributed to better dispersion and compatibility between them. In particular, 7-ZIF-8-NH 2 /PVA MMM exhibited a comparable total flux of 142 g/m 2 ·h and water/ethanol separation factor of 925, which were increased by 73 and 524%, on the basis of the pristine PVA membrane. In addition, different nanofillers, APTES crosslinking, ZIF-8-NH 2 loading, operating temperature, feed concentration, and membrane stability were evaluated in detail. This study might provide a promising prospect for designing MOF-based MMMs with the introduction of various functional groups.
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高影响因子
Chemistry-An Asian Journal
·
2021
·Vol. 16
·期 15
·2146-2153
·
IF 4.568
Liling Lei,Yiwei Zheng,Xichen Zhang,Yutian Su,Xi Zhou,Shishan Wu,Jian Shen
Graphical A new zinc-ion hybrid capacitor assembled by using a Zn@annealed ZIF-8 anode and ZIF-8 derived C cathode provides a capacity of 135.5 mAh g −1 and an energy density of 108.4 Wh kg −1 with a power density of 800 W kg −1 at 1.0 A g −1 . Zn is a promising anode for aqueous energy storage owing to it intrinsic superior properties such as large capacity, abundant reserves, low potential and safety. But, the growth of dendrites during charge and discharge leads to a decrease in reversibility. In addition, further development of zinc-ion hybrid capacitors (ZICs) is seriously challenging because of the lack of an exceptional cathode. Herein, we use ZIF-8 annealed at 500 °C (annealed ZIF-8) as a host material for stable and dendrite-free Zn anodes. Utilization of annealed ZIF-8 results in dendrite-free Zn deposition and stripping as a result of its porous construction, which contains trace Zn. Furthermore, we firstly proposed innovative N,O dual-doped carbon which was designed by the derived ZIF-8 (ZIF-8 derived C) as cathode for high-energy and power-density ZICs. The new ZIC assembled by Zn@annealed ZIF-8 anode and ZIF-8 derived C cathode provides a capacity of 135.5 mAh g −1 and an energy density of 108.4 Wh kg −1 with a power density of 800 W kg −1 at 1.0 A g −1 . In addition, it shows outstanding cycling stability of 91% capacity retention after 6000 cycles at 5.0 A g −1 . Moreover, the solid-state ZICs can drive LEDs and smart watches. This ZIC holds promise for the practical application of supercapacitors.
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高影响因子
Sensors & Diagnostics
·
2022
·Vol. 1
·期 5
·1052-1062
·
IF 0
Qingyu Gu,Zhongxue Wang,Qianwen Ding,Huiling Li,Ping Wu,Chenxin Cai
An electrochemical sensor based on single-atom cobalt-anchored nitrogen-doped carbon catalysts (Co/N–C SACs), synthesized by pyrolyzing zeolitic imidazolate frameworks (Co-ZIF-8), was constructed to quantify sulfamethoxazole (SMX), a member of the sulfonamide family of antibiotics, in environmental water samples. The quantification depends on the electrocatalytic oxidation of the aromatic –NH2 group in the SMX molecule to the hydroxylamine group (–NHOH). The sensor was fabricated by depositing the Co/N–C SAC suspension (in a mixture of water, ethanol, and Nafion) on a glassy carbon (GC) electrode surface. The response of the sensor showed a linear relationship with SMX in a wide range of concentration (0.08–66.5 μM) with a limit of detection (LOD) of ∼15 nM at a signal-to-noise (S/N) ratio of 3. The sensor also had high repeatability, reproducibility, and stability. Moreover, it exhibited high selectivity and resistance to interference in the presence of other antibiotics (trimethoprim, ciprofloxacin, and norfloxacin selected randomly), endocrine disruptors (17β-estradiol), pesticides (carbaryl), common aqueous ions (Na+, K+, Fe3+, Cu2+, Ca2+, Cl−, Br−, CO32−, SO42−, and NO3−), and common surfactants (sodium dodecyl sulfate and Triton X-100). Furthermore, the sensor was used to quantify the SMX in environmental water samples (lake water, groundwater, and secondary wastewater) with high accuracy. This electrochemical method can be used for quantifying SMX in environmental water samples for various applications, including biomedical analysis, environmental pollutant detection, and water safety evaluation.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 16
·24113-24128
·
IF 0
Ma Xiaoxiao,Li Yutong,Du Yile,Chen Shuangli,Bai Yunfan,Li Lin,Qi Chuhua,Wu Pingping,Zhang Sijing
The presence of organic dyes in aquatic systems poses a significant threat to ecosystems and human well-being. Due to recycling challenges, traditional commercial activated carbon is not cost-effective. To address this, an imidazolate acid zeolite framework-8 (ZIF-8)-modified magnetic adsorbent (ZMPLB-800) was synthesized through the in-situ formation of ZIF-8 and subsequent carbonization at 800 °C, using magnetic pineapple leaf biochar (MPLB) as a carrier. The porous structure of ZMPLB-800 facilitates the rapid passage of dye molecules, enhancing adsorption performance. ZMPLB-800 exhibited remarkable adsorption capacity for methylene blue (MB) across a pH range of 3–13, with a maximum adsorption capacity of 455.98 mg g −1 . Adsorption kinetics and thermodynamics followed the pseudo-second-order kinetic model and Langmuir isotherm model. Mechanisms of MB adsorption included pore filling, hydrogen bonding, electrostatic interactions, π-π interactions, and complexation through surface functional groups. Additionally, ZMPLB-800 demonstrated excellent regeneration performance, recording a removal efficiency exceeding 87% even after five adsorption/desorption cycles. This study provides a novel strategy for treating dye wastewater with MOF composites, laying the foundation for waste biomass utilization. Graphical
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RSC Advances
·
2014
·Vol. 4
·期 106
·61736-61742
·
IF 3.708
Shu-Tao Gao,Wei-Hua Liu,Ning-Zhao Shang,Cheng Feng,Qiu-Hua Wu,Zhi Wang,Chun Wang
Efficient utilization of solar energy has received tremendous attention due to the increasing environmental and energy concerns. In this paper, a plasmonic photocatalyst integrated with metal–organic framework (MOF) material, Ag/AgCl@ZIF-8, was fabricated for the first time. The unique hetero-junction structure of Ag/AgCl@ZIF-8 greatly enhanced its photocatalytic activity. Selecting RhB as a model pollutant, 98% of RhB can be degraded after 16 min under solar radiation. The relationship between the photocatalytic activity and the structure of Ag/AgCl@ZIF-8 hybrid materials was discussed and the possible reaction mechanism was proposed. The high photocatalytic activity of the hybrid material under solar radiation revealed its great application potential in directly harvesting solar energy to solve the environmental pollution issues.
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高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2016
·
IF 3.926
Suling Zhang,Weixuan Yao,Jianbo Ying,Hongting Zhao
Zeolitic imidazolate frameworks (ZIFs) consist of metal nodes connected to imidazolate linkers, having both the properties of metal-organic frameworks (MOFs) and inorganic zeolites, such as controllable pore sizes, high porosity and surface areas, as well as exceptional thermal and chemical stability, thereby making them a class of attractive materials for diverse analytical applications. In this study, we reported a facile magnetization process of ZIF-7 (zinc benzimidazolate) for simultaneous magnetic extraction of polycyclic aromatic hydrocarbons (PAHs) by simply mixing ZIF-7 and polydopamine (PDA)-coated Fe 3 O 4 nanoparticles (PDA@Fe 3 O 4 ) in solutions. Functional groups (−OH and −NH 2 ), provided by PDA as a highly efficient molecular linker, could attract and anchor ZIF-7 through noncovalent adsorption and covalent cross-link interactions, thereby promoting the complete magnetization of ZIFs and enhancing their stability and reusability. The bridging ligand benzimidazolate, could be bonded with PAHs because of its high surface area, large pores, accessible coordinative unsaturated sites (π-complexation), and π-π stacking action. This ZIF-based magnetic solid-phase extraction (SPE), coupled with gas chromatography/tandem mass spectrometry (GC/MS), was further evaluated for analysis of PAHs from rainwater and air samples of particulate matter less than 2.5 μm in diameter (PM 2.5 ). The main effective parameters, including ionic strength, solution pH, extraction time, desorption solvent and desorption time, were investigated, respectively. Under optimized conditions, the developed method based on Fe 3 O 4 @PDA/ZIF-7 gave detection limits of 0.71–5.79 ng/L, and quantification limits of 2.50–19.2 ng/L for PAHs, respectively. The relative standard deviations for intra-day and inter-day analyses were in the range of 3.1–9.1% and 6.1–12.7%, respectively. The PAHs founded in PM 2.5 were in the range of 0.40–6.79 ng/m 3 . Good recoveries (>82%) with low relative standard deviations (≤9.2%) were achieved. This method was demonstrated to be an accurate, convenient and sensitive pretreatment procedure for trace analysis of environmental water and air samples.
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高影响因子
POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Biyu Huang,Haopeng Zhang,Jirui Qu,Gaoyuan Li,Hongbo Zhao,Lei Liu,Chuanmei Jiao,Xilei Chen
Exceptional fire safety, mechanical flexibility, ultraviolet (UV) resistance, and transparency are critical characteristics for thermoplastic polyurethane (TPU) materials in rapidly evolving industrial applications. Nevertheless, achieving a harmonious balance among these properties remains a significant challenge. In this paper, bio-based phytic acid/chitosan intumescent flame retardant (CaCS@PA) and cobalt metal-organic framework (ZIF-67) were incorporated into TPU, forming a densely crosslinked network through non-covalent interactions including hydrogen bonding and π-π stacking. The resulting TPU/ZIF-67-CaCS@PA composites show significant fire safety performance, with a 49.8% reduction in peak heat release rate and a 30.0% decrease in peak smoke production. Analysis of the condensed and gas phases indicated that the flame-retardant mechanism of ZIF-67-CaCS@PA primarily relies on the ability of ZIF-67 to influence the migration of intumescent flame retardant (IFR) gases and catalyze carbonization. This process accelerates the formation of a highly graphitized, thermally stable, and compact char layer, which acts as an effective protective barrier. Owing to the synergistic effect of supramolecular interactions, the tensile strength and elongation at break of the TPU composites were significantly enhanced to 39.6 MPa and 787.4%, representing increases of 155.6% and 27.7% prior to the pure TPU, respectively. Additionally, TPU/ZIF-67-CaCS@PA displays excellent transparency and UV resistance, effectively mitigating aging, yellowing, and strength degradation under UV exposure. This study successfully achieved a desirable balance between fire safety, mechanical performance, UV shielding, and transparency in TPU composites, offering valuable insights and potential advancements for both industrial applications and academic research.
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产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Yilin Wu,Yanke Xu,Faguang Ma,Jingjing Zhen,Yue Li,Fanlei Kong,Ming Yan
In this study, modified hollow e-ZIF-8 nanoparticles with a hollow structure and hydroxyl-rich surface were ingeniously synthesized through a one-step etching method, thereby increasing the contact area and addressing the issue of stacking imprinting sites, fundamentally enhancing selectivity. Among these, the hollow structure of the e-ZIF-8 nanoparticles not only increased the interlayer spacing of the graphene oxide (GO) nanosheets, providing additional pathways for water molecules, but also, through π-π interactions, cross-linked the phenol-modified nanoporous metal-organic frameworks (MOFs) with the GO nanosheets, significantly enhancing the structural stability and anti-fouling capability of the composite membrane. The effects of different e-ZIF-8 addition amounts on membrane flux and hydrophilicity were investigated, constructing a GO-based imprinting structure on the stacked e-ZIF-8/GO nanosheet surfaces, offering a novel strategy to improve the selectivity and stability of the membrane. The maximum adsorption capacity of e-MG-IMs reached 38.35 mg g −1 , demonstrating good selective separation factors ( α RBV/ACV = 3.24, α RBV/AZT = 2.41 and α RBV/LAM = 4.21), as well as excellent permeation selectivity ( β ACV/RBV = 4.75, β AZT/RBV = 4.42 and β LAM/RBV = 5.92). In this study, the optimized regulation of GO nanosheets extended the molecular transport channels, facilitating the construction of more molecular recognition sites, thus positively impacting the separation performance of the imprinting membrane.
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 18
·15061-15067
·
IF 3.201
Jing Ma,Bing Yan
We prepared multi-component luminescent hybrid films based on a silicon chip by a covalent functionalization strategy of both metal–organic frameworks (ZIF-90) and lanthanide complexes. Herein the Si chip is firstly covalently modified by aminopropyltriethoxysilane (APTES) via a hydrolysis and condensation reaction, and then ZIF-90 is covalently grafted onto the surface of Si chip through imine condensation with APTES to form the hybrid films (Si-APTES-ZIF-90). Ternary lanthanide complexes with 3-methacryloxypropyltrimethoxysilane (MPTMS) and Phen (1,10-phenanthroline) are introduced to the above film systems through MPTMS as a covalent linker. The final multi-component hybrid films (Phen-Ln-MPTMS-Si-APTES-ZIF-90) display the typical Ln3+ (Ln = Eu, Tb, Sm and Dy) luminescence through the energy transfer from the MPTMS-Si-APTES-ZIF-90 host. Moreover, fine tuning of the luminescence color for these films is discussed by adjusting the excitation wavelength. Phen-Ln-MPTMS-Si-APTES-ZIF-90 (Ln = Eu, Sm, Dy) can exhibit white color emission closely by selective excitation. In addition, the consolidation stability under airflow of the film and the luminescence stability of the film under certain humidity environments are discussed.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 15
·10772-10783
·
IF 2.993
Liu Guangyang,Li Lingyun,Huang Xiaodong,Zheng Shuning,Xu Xiaomin,Liu Zhongxiao,Zhang Yanguo,Wang Jing,Lin Huan,Xu Donghui
In this study, the functional adsorbent metal–organic framework ZIF-8/magnetic multi-walled carbon nanotubes (M-M-ZIF-8) was successfully prepared for removal of eight organophosphorus pesticides from environmental water and soil samples. The M-M-ZIF-8 was characterized and their adsorption capacity was evaluated based on their isothermal adsorption curves. The results suggest that ZIF-8 particles are deposited on the surface of the magnetic MWCNTs via coordination–polymerization strategy. In addition, M-M-ZIF-8 has high static adsorption capacities for organophosphorus pesticides because of its high specific surface area and porous structure. The static adsorption data fit the Freundlich adsorption model better than the Langmuir model. Under the optimized conditions, M-M-ZIF-8 was successfully applied to remove the eight organophosphorus pesticides from environmental water and soil samples. A possible mechanism is valence-electron-driven adsorption by sharing or exchanging of electrons between the organophosphorus pesticide molecules and the vacant active sites of M-M-ZIF-8. Therefore, M-M-ZIF-8 is a promising hybrid adsorbent for adsorption and removal of organic pollutions from the environment.
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高影响因子
Gels
·
2022
·Vol. 8
·期 10
·610
·
IF 4.432
Zong-Mu Dong,Peiyi Zhang,Tong Sun,Qian Xia,Jian-Feng Wu,Guang-Chao Zhao
In this study, a hybrid composite featuring zeolitic imidazolate framework-8/carbon aerogel (ZIF-8/CA) was synthesized via in situ nucleation and growth of ZIF-8 nanoparticles inside carbon aerogels. The novel material was used as the solid-phase microextraction (SPME) coating for the five phthalic acid esters (PAEs) detection by coupling with a gas chromatography–flame ionization detector (GC-FID). Compared with bare carbon aerogel, the ZIF-8/CA presented the best performance, which is attributed to the unique advantages between the high surface area of CA and high hydrophobic properties, the thermal stability of ZIF-8, and their synergistic adsorption effects, such as molecular penetration, hydrogen bond, and π–π stacking interactions. Under the optimized conditions, the as-proposed ZIF-8/CA fiber provided a wide linearity range from 0.2 to 1000 μg L−1and a low detection limit of 0.17–0.48 μg L−1for PAEs analysis. The intra-day and inter-day of signal fiber and the fiber–fiber relative standard deviations were observed in the ranges of 3.50–8.16%, 5.02–10.57%, and 5.66–12.11%, respectively. The method was applied to the determination of five PAEs in plastic bottled and river water samples.Keywords:carbon aerogel;metal–organic framework;phthalate acid ester;solid-phase microextraction
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PubMed
高影响因子
危险品化学品经营许可证（带存储）