CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Weibin Chen,Changshui Wang,Shibiao Su,Hai Wang,Dandan Cai
The quest for desirable two-dimensional (2D) materials and facile strategies to construct 2D layered composites with fascinating structures and compositions for high-performance electrocatalysis is still a major challenge. In the present research, novel nanocomposites of 2D zeolitic imidazolate framework-9 (ZIF-9) combined with Co-layered double hydroxide (Co LDH) were successfully synthetized through a controllable phase transition from ZIF-9(I). The 3D to 2D structural transformation of ZIF-9 was induced by deionized water, and the formation of 2D Co LDH was simultaneously realized during the one-step fabrication of ZIF-9(III)/Co LDH nanocomposites. Due to the high surface area, the presence of abundant metal sites, and the interactions between 2D ZIF-9(III) and 2D Co LDH, the as-optimized ZIF-9(III)/Co LDH nanocomposite exhibits great electrochemical activities for oxygen evolution reaction (OER) (η = 297 mV at 10 mA cm −2 ) in 1.0 M KOH solution. The electrochemical performance of the ZIF-9(III)/Co LDH nanocomposite was superior to those of the pure Co LDH, ZIF-9(III), and commercial RuO 2 . The present work demonstrates that the proposed strategy can effectively boost catalytic activities and also design new routes to synthesize advanced MOF nanohybrids for various applications.
研究领域:
材料科学
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电化学
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纳米技术
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DOI
高影响因子
ANALYST
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2024
·Vol. 149
·期 24
·5784-5790
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IF 3.6
Yi-Xuan Li,Yu-Xuan Dai,Ju-Zheng Wang,Jérome Chauvin,Xue-Ji Zhang,Serge Cosnier,Robert S. Marks,Dan Shan
The concentration of zinc ions in semen is significantly correlated with sperm viability and male fertility. In this work, a reliable ratiometric fluorescence probe (ZIF-9-TCPP) based on the efficient Förster resonance energy transfer (FRET) process between two luminophores, benzimidazole (BIM) and meso-tetra (4-carboxyphenyl) porphyrin (TCPP) for Zn2+ detection has been constructed, where the emissions of BIM and TCPP are used as reference and detection signals. The proximity of BIM and TCPP in one framework (ZIF-9-TCPP) and the overlapped spectra between BIM and TCPP afford the attainment of a highly efficient FRET (around 90% efficiency). Efficient FRET improves the fluorescence intensity of porphyrin to enhance the sensitivity of detection. The unique spectral shift resulting from Zn2+ binding to the porphyrin ring ensures the selectivity of detection. In addition, the response mechanism of the proposed ratiometric probes to Zn2+ has been investigated. This work provides a convenient way to design an efficient FRET system and a promising method for sperm mobility detection.
研究领域:
生物化学
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生殖医学
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分析化学
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DOI
PubMed
高影响因子
Molecular Catalysis
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2020
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IF 3.687
Fanfan Yue,Ao Hu,Xinhuan Lu,Chenlong Wang,Haijun Pan,Haifu Zhang,Lu Yang,Qinghua Xia,Dan Zhou,Yongde Xia
Benzimidazole and metal cobalt salts were employed in the synthesis of Co-ZIF-9 by solvothermal crystallization. Highly active catalysts for selective hydrogenation of carbonyl compounds were developed. The optimal nanocatalyst Co-ZIF-350 manifested remarkable activity and selectivity for the hydrogenation of cyclohexanone under mild conditions. Catalytic conversion of cyclohexanone reached the highest over the catalyst of Co-ZIF-9-pyrolyzed at 350 °C for 2 h, in which the conversion of cyclohexanone was 100 % and the selectivity of cyclohexanol was ＞99 % at 50 °C. A wide scope of ketones/aromatic aldehydes could be selectively reduced to the corresponding alcohols with high yields. Importantly, the nanocatalyst Co-ZIF-350 presented good tolerance of substrates with various functional groups under mild conditions.
研究领域:
催化化学
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材料科学
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DOI
高影响因子
NANOTECHNOLOGY
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2022
·Vol. 33
·期 20
·205402
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IF 3.953
Tianyang Li,Zhikun Xu,Shuangyan Lin
Rational design and controllable synthesis of metal-organic frameworks nanosheets is critical for electrochemical catalysis. Herein, a carnation-like ZIF-9 nanostructure made of nanosheets is grown on nickel foam (ZIF-9/NF) by a simple one-step solvothermal method, the morphology evolution and the electrocatalytic oxygen evolution properties have been investigated by controlling the solvothermal time. The binder-free ZIF-9-d/NF (60 h, solvothermal time is 60 h) electrode delivers efficient electrocatalytic oxygen evolution reaction activity with low overpotentials of 312 and 337 mV at 50 and 100 mA cm−2, respectively. Furthermore, ZIF-9-d/NF (60 h) exhibits excellent stability without obvious attenuation for at least 30 h at 200 mA cm−2. The excellent performances can be attributed to the combination of the highly exposed active sites in the ZIF-9-d nanosheets, as well as the effective electron conduction and mass transfer. This work provides much possibilities for ZIF-9 nanosheets as binder-free electrode for electrocatalyst.
研究领域:
材料科学
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电化学
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DOI
高影响因子
CELLULOSE
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2020
·Vol. 27
·期 6
·3287-3300
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IF 4.21
Zhang Su-Feng,Li Hao,Hou Chen,Liu Li-Na,Wang Yang,Zhao Meng-Ke,Liang Chen
Abstract The treatment of dyes in wastewater is important to solve environmental problems. Advanced oxidation processes has been proved to be an effective treatment. In this work, a novel nanocomposite catalyst of ZIF-9@Fe 3 O 4 (cobalt-containing zeolitic imidazolate framework-9 coated Fe 3 O 4 nanocomposite) modified reduced graphite oxide (RGO) was prepared for the first time and coded as ZIF-9@CA-Fe 3 O 4 /RGO. Then, ZIF-9@CA-Fe 3 O 4 /RGO was immobilized on a cellulose membrane to obtain a composite membrane, which was used as a composite catalyst for activating peroxymonosulfate to degrade methylene blue (MB). The results demonstrated that the composite membrane could efficiently degrade approximately 96% of MB in 9 min without adjusting the initial pH and maintain good catalytic activity even after seven cycles. Furthermore, the composite membrane can be easily separated from the solution at the end of the reaction. This work indicates that the composite membrane has a broad application prospect in industrial applications. Graphic abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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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 .
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Catalysts
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2022
·Vol. 12
·期 7
·688
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IF 4.501
Guolei Xiao,Weibin Chen,Yaming Cai,Shifan Zhang,Di Wang,Dandan Cai
Layered double hydroxide (LDH) has emerged as a promising electrocatalyst; however, the synthetic method usually requires high temperature and high pressure, and sulfate-intercalated LDH is rarely reported. Herein, the sulfate-intercalated CoFe LDH nanosheets were successfully fabricated at ambient temperature via a facile strategy, using two-dimensional ZIF-9(III) as a template and FeSO4as both etchant and iron source. When the as-prepared sulfate-intercalated CoFe LDH acts as an electrocatalyst, it presents superior electrocatalytic performance for the oxygen evolution reaction (OER), requiring low overpotential (η@10 mA cm−2= 218 mV) with a small Tafel slope of 59.9 mV dec−1in 1.0 M KOH, which compares favorably with commercial RuO2and most reported transition-metal electrocatalysts. The high catalytic activity of CoFe LDH might be ascribed to the large interlayer space distance originating from special SO42−ions and the strong synergistic effects between Fe and Co. This work provides a novel and feasible approach to designing highly efficient electrocatalysts based on advanced LDH materials for OER.Keywords:facile synthesis;sulfate-intercalated CoFe LDH;two-dimensional ZIF-9(III);electrocatalysts;oxygen evolution reaction
研究领域:
材料科学
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电化学
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DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2023
·Vol. 49
·期 7
·3161-3180
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IF 3.3
Liu Wenyi,Sun Dedong,Ma Hongchao,Ma Chun,Zhang Xinxin,Hao Jun
In the present work, a novel CeO 2 /ZIF-9 composites were prepared, characterized and used as a multiphase catalyst to activate peroxymonosulfate (PMS) to degrade methylene blue (MB). The effects of Ce/Co molar ratio, catalyst dose, PMS concentration, initial solution pH and reaction temperature were explored. The results showed that 20 mg/L MB was almost absolutely degraded, and the removal rate of COD reached 77.8% by 150 mg/L PMS activated with 50 mg/L 0.50-CeO 2 /ZIF-9 within 30 min at room temperature (20 °C) and initial pH 6.4. The active species such as SO 4 •− , 1 O 2 and • OH performed important roles in the catalytic process, as evidenced by quenching experiment and electron paramagnetic resonance (EPR) analysis. The synergistic catalytic mechanism of 0.50-CeO 2 /ZIF-9 in the heterogeneous activation of PMS was proposed, which mainly involves the enhanced redox cycle of Co 3+ /Co 2+ by Ce 3+ donated electrons. Recycling experiments suggested that the removal efficiency of MB can still reach 92.9% after four catalytic cycles, indicating good reusability of 0.50-CeO 2 /ZIF-9 catalyst. Therefore, because of its easy preparation, superior catalytic performance and reusability, the 0.50-CeO 2 /ZIF-9 composite catalyst has promising applications in water treatment.
研究领域:
环境科学
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催化
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水处理
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Yalai Cen,Yameng Lv,Yanli Zhang,Yuelan Fang,Wenfeng Zhuge,Xiaokun Li
In this experiment, we synthesized tubular carbon nanotube-encapsulated ZIF-9-Mel heterojunction nanomaterials using catalytic synergy. • The synthesized ZIF-9-Mel@MWCNTs offer the advantages of low cost and wide availability and exhibit excellent electrochemical performance. • An electrochemical sensor constructed using this material and a three-electrode system has been successfully applied to the detection of amlodipine benzoate (ADB), achieving a wide linear range and a low detection limit. • The ZIF-9-Mel@MWCNTs electrochemical sensor developed was successfully applied to the detection of actual ADB samples, yielding satisfactory results. Amlodipine besylate (ADB) is a first-line drug for treating hypertension, and improper intake can lead to serious adverse reactions. Therefore, its precise determination is crucial for safeguarding public health. This study synthesized plate-like ZIF-9-Mel via a one-pot hydrothermal method. Finally, by modifying and compositing plate-like ZIF-9-Mel with carboxylated multi-walled carbon nanotubes (MWCNTs), the ZIF-9-Mel@MWCNTs composite material was successfully obtained. The morphology and structural characteristics of this material were determined using analytical techniques such as scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Additionally, this study employed ZIF-9-Mel@MWCNTs to construct an electrochemical sensor for detecting ADB. Leveraging its high electrochemical catalytic activity toward ADB, the sensor provided linearity from 1 to 90 μM and a detection limit down to 0.344 μM, the quantitative limit is 1.147 μM. The constructed ADB electrochemical sensor exhibits satisfactory reproducibility, stability, and anti-interference performance. This approach proved effective for analyzing real ADB specimens, achieving satisfactory recovery rates. Overall, this innovative sensor offers a new approach for efficient, low-cost detection by ADB. Download: Download high-res image (355KB) Download: Download full-size image
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DOI
高影响因子
AICHE JOURNAL
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2025
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IF 4
Xinrui Liu,De Ao,Mao Ye,Zhi Wang,Zhihua Qiao,Song Zhao
Metal–organic framework (MOF) glass holds great promise for gas separation applications. However, the inherent low porosity of MOF glass poses a considerable challenge in improving membrane permeability. In this work, a self-supporting MOF crystal-glass composite (CGC) membrane was synthesized via an innovative blending and melting approach, in which ZIF-62 powder was converted into an amorphous glassy phase and ZIF-9 powder was partially flux-melted, effectively preventing the reorganization of Zn─N bonds within ZIF-62. Consequently, the composite component structure significantly enhances the porosity and permeability of the MOF glass membrane. Furthermore, the incorporation of cobalt into the membrane matrix has notably enhanced its adsorption affinity for CO 2 , thereby boosting CO 2 /CH 4 selectivity. The resultant a g [(ZIF-9) 0.2 /(ZIF-62) 0.8 ] membrane has demonstrated exceptional CO 2 permeability of 20,324 barrer and superior CO 2 /CH 4 selectivity, both surpassing the 2018 upper bound. Thus, the innovative strategy for the design of MOF CGC membranes offers effective solutions to the challenges inherent in gas separation processes.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2016
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IF 2.567
Yuyao Huang,Dahuan Liu,Ziping Liu,Chongli Zhong
In this work, ZIF-9 membranes were successfully synthesized using temperature-switching synthesis method. Compared with the conventional hydrothermal synthesis at a constant temperature, this method could promote the growth of crystals on the support. Scanning electron microscopy (SEM) demonstrated that the obtained membranes had continuous and well-intergrown layer with a denser surface and better crystal size uniformity. As a result, gas separation performance was enhanced. It is also found that the properties of membrane can remain almost stable at a relatively broad range of operating temperature and transmembrane pressure drop, which is beneficial for the practical operation of membrane in the separation process. More importantly, this synthesis strategy can be conveniently extended to the preparation of other MOF membranes with improved performance.
研究领域:
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Zijun Yu,Fujiang Geng,Mengjie Han,Dudu Li,Zibo Yang,Zhihua Qiao
6FDA-APBIA was in-situ incorporated into the ZIF-9 framework via coordination bonds. • 6FDA-APBIA incorporation effectively increased the ultra-microporous volume of ZIF-9. • polyZIF-9 based MMMs exhibit excellent H 2 /CH 4 and CO 2 /CH 4 separation performance. • pZ9–30 MMM shows 2.2-fold (H 2 /CH 4 ) and 1.4-fold (CO 2 /CH 4 ) selectivity over pure PI. • pZ9–30 MMM has good interfacial compatibility and long-term operational stability. Mixed-matrix membranes (MMMs) have broad application prospects in the field of gas separation, particularly for the efficient separation of H 2 /CH 4 and CO 2 /CH 4 , which is of great significance for hydrogen energy recovery and natural gas purification. This study proposes a strategy to in situ incorporate 6FDA-APBIA polymer into the ZIF-9 framework via coordination bonds, constructing polyimide-based ZIF-9 materials (pZ9) with tunable pore structure. The characterization results confirm that the appropriate incorporation of polymer increased the ultra-microporous volume of ZIF-9 for achieving molecular sieving. Furthermore, pZ9 materials were used as fillers to prepare self-supported MMMs with varying loadings. Notably, the gas permeation tests revealed that the MMM with 30 wt% pZ9 loading exhibited excellent H 2 /CH 4 and CO 2 /CH 4 separation performance (α H2/CH4 ≈ 328.05, α CO2/CH4 ≈ 95.21), both exceeding the corresponding upper bounds. This work provides insights into the design of high-performance MMMs, showing promise for applications in hydrogen recovery and natural gas purification. Download: Download high-res image (100KB) Download: Download full-size image
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高影响因子
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