SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Wei Meng,Yuanyuan Wen,Lei Dai,Zhangxing He,Ling Wang
In this paper, we demonstrated the first application of a Co-based porous metal-organic framework (MOF) ZIF-67 as the glucose electrochemical sensor. The ZIF-67 modified glassy carbon electrode (GCE) showed an excellent catalytic activity towards glucose oxidation. Meanwhile, to improve the electrocatalytic performance of the modified electrode, a novel Ag@ZIF-67 nanocomposite was fabricated through a sequential deposition-reduction method. The Ag@ZIF-67/GCE exhibited an enhanced catalytic activity towards glucose oxidation. The electrocatalytic performance of Ag@ZIF-67 with different Ag loadings was investigated, and the results indicated that with the Ag contents increasing from 0% to 0.5%, the response time of the modified electrode was shorten by more than two times, and the sensitivity was increased by two times and a half. The Ag-0.5%@ZIF-67GCE exhibited excellent electrocatalytic performances in the glucose concentration range of 2–1000 μM, including a high sensitivity of 0.379 μA μM −1 cm −2 , a low detection limit of 0.66 μM (S/N = 3) as well as good selectivity and stability.
研究领域:
分析化学
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生物医学工程
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yilin Zhang,Yanhui Long,Kaiyi Wang,Xiaosong An,Liboting Gao,Zijiang Zhao,Jianhua Yan,Hao Zhang
Developing alternatives to the energy-intensive Haber–Bosch (H–B) process for ammonia synthesis is imperative yet challenging. Herein, Ni-modified zeolitic imidazolate framework (ZIF) Ni@ZIF-67 nanocrystals were synthesized and applied in a dielectric barrier discharge reactor for plasma-assisted ammonia synthesis under ambient pressure. Introducing ZIF-67 into the plasma enhanced the ammonia synthesis rate by an order of magnitude, evidencing strong plasma–catalyst synergism. The superior performance was attributed to the unique microstructure featuring a high specific surface area and abundant porosity, which improved gas adsorption and intensified microdischarge within the plasma. Further incorporation of Ni into ZIF-67 (Ni@ZIF-67) resulted in a maximum ammonia synthesis rate of 289.45 μmol g–1 min–1 and an energy yield of 1.83 g kWh–1─a 32.0% improvement over ZIF-67─while maintaining structural stability over repeated cycles. Moreover, the confinement of NH3 within sub-Debye-length micropores suppressed plasma-induced decomposition. The addition of Ni further significantly boosted both the hydrogen/ammonia adsorption capability and discharge efficiency, which promoted ammonia formation, especially in a H2-rich atmosphere. These findings underscored the potential of Ni@ZIF-67 as a promising catalyst for plasma-assisted ammonia synthesis, providing a viable alternative to the conventional H–B process.
研究领域:
催化
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等离子体化学
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材料科学
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纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 15
·11503-11510
·
IF 4.6
Ping Li,Xiaolin Yue,Anhong Li,Can Cui,Lan Wang,Wenyuan Tan
Cobalt 2-methylimidazole (ZIF-67) has been broadly explored for its applications in the treatment of antibiotics in wastewater. However, ZIF-67 in powder form is difficult to recover. In the study, ZIF-67 and Polyvinylidene Fluoride (PVDF) were blended via electrospinning to prepare ZIF-67/PVDF membrane for adsorption of ciprofloxacin (CIP). The ZIF-67/PVDF membrane demonstrated outstanding adsorption efficiency for CIP, with a maximum adsorption capability of 4087.5 μg cm−2. The adsorption performance of ZIF-67/PVDF remains stable across a wide pH range and is unaffected by ionic interference. The ZIF-67/PVDF adsorbent follows pseudo-second-order kinetics and the Langmuir model. Furthermore, thermodynamic research indicates the adsorption of CIP is a spontaneous and exothermic process. It is proposed that the adsorption mechanism of CIP onto ZIF-67/PVDF involves electrostatic interactions, hydrogen bonding, π–π interactions, coordination bonding, and hydrophobic interactions.
研究领域:
环境科学
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材料科学
·
水处理技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 25
·e202304989
·
IF 1.9
Ying Chen,Zhangyi Lv,Jinqiu Yuan,Mingchun Bi,Yuning Liang
Graphical ZIF-67 nanocubes (ZIF-67 NCs) had been etched to produce small amounts of cross-linked Co-LDH-1 while preserving the cubic structure, which provided sufficient quantities of cobalt ions. The catalytic activity of OER has been enhanced by the cubic-structured LDH, which leads to a significantly lower overpotential in alkaline media and a calculated lower activation energy Ea. To address the substantial energy needs of the quickly evolving modern civilization, efforts are still needed to provide sustainable renewable energy sources. The electrocatalytic Oxygen evolution reaction (OER) is one of the essential technologies used in the various hydrogen production techniques. ZIF-67 nanocubes (ZIF-67 NCs) were synthesized in an aqueous solution and used as sacrificial templates. Cobalt nitrate hexahydrate was added under water bath conditions, resulting in the evolution of numerous small layered layers of cobalt hydroxide. This ultimately led to the formation of multilayered, three-dimensionally crosslinked Co-LDH with a porous networked cubic morphology. Hydrolysis of Co 2+ at different concentrations produces different degrees of weak acidic environments, and the loose LDH on the cubic structure of the best catalyst, Co-LDH-1, exposes more active cobalt sites for the OER, which results in a high electrochemically active surface area, with an overpotential of 354 mV and a Tafel slope of 79.06 mV dec −1 at a current density of 10 mA cm −2 , and good stability and low activation under alkaline condition also has good stability and low activation energy. It provides us an easy and practical plan for logically creating ZIF-derived hydroxide materials, leading to the development of affordable and effective electrocatalysts.
研究领域:
材料科学
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电化学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Qiuping Fu,Jie Lou,Hui Yuan,Rongbin Zhang,Chunmei Zhang,Changli Mo,Jun Luo,Lei Zha,Pan Wu
ZIF-67@CS composites were prepared by in-situ growth method. The phase and structure of ZIF-67@CS composite were characterized by X-ray powder diffraction (XRD) and fourier transform infrared spectroscopy (FT-IR). The morphology of the materials was characterized by field emission scanning electron microscope (SEM). X-ray photoelectron spectroscopy (XPS) measurements demonstrated the existence of Pb(II) after the adsorption process of composite materials. The adsorption of Pb(II) by composite material conforms to Langmuir model, the theoretical maximum adsorption capacity is 505.051 mg/g. The pseudo-second-order kinetic model can well describe the adsorption kinetic process.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Material Cycles and Waste Management
·
2024
·
IF 2.7
Zhu Wenzhong,Zhu Xueting,Shen Weijian,An Nan,Wu Lina
Antibiotics are extensively employed in the treatment of human and animal ailments. However, their excessive use and poor biodegradability have led to a notable accumulation of antibiotics in the environment, presenting potential health hazards to humans. In this study, tetracycline (TC) was selected as a representative antibiotic, and a recyclable material, Mn-ZIF-67, was synthesized to degrade TC through adsorption and peroxidase-like activity. Mn-ZIF-67 significantly enhances the peroxidase-like activity of ZIF-67. The removal efficiency of TC was boosted by 300% compared to ZIF-67 within a 10-min timeframe. With its high catalytic activity and stability, Mn-ZIF-67 exhibits significant promise for the swift degradation and elimination of antibiotics from the environment.
研究领域:
环境科学
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材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2014
·
IF 0
Hongyan Li,Hong Ma,Xinhong Wang,Jin Gao,Chen Chen,Song Shi,Minjie Qu,Na Feng,Jie Xu
Efficient catalytic oxidation of ethylbenzene to acetophenone was realized using the catalytic system of cobalt zeolitic imidazolate framework ZIF-67/N-hydroxyphthalimide (NHPI) under mild conditions. 95.2% conversion of ethylbenzene with 90.3% selectivity to acetophenone could be obtained at 373 K under 0.3 MPa O 2 for 9 h. The results show that there exists synergetic effect between ZIF-67 and NHPI. 1-Phenylethyl hydroperoxide (PEHP) was generated via a radical process involving the hydrogen abstraction from ethylbenzene by phthalimide N-oxyl, and subsequently effectively decomposed to acetophenone by ZIF-67.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
Advanced Science
·
2025
·
IF 14.1
Xinhui Cao,Xinyi Wu,Xue Wang,Jiamei Luo,Zhe Zhang,Yi Xue,Guoliang Zhang,Liying Zhang,Hui Zhang,Jianyong Yu
Metal-organic framework (MOF)-derived architectures are regarded as an effective electromagnetic wave (EMW)-absorbing materials owing to their adjustable compositions and microstructures. The combination of MOFs with carbon nanofibers (CNFs) is a practical method to increase the EMW absorption ability. In this work, cobalt-based zeolitic imidazolate framework-67 (ZIF-67) serves as a self-sacrificing precursor to fabricate Co-carbon nanofiber (Co-CNF) composites via an in situ electrospinning strategy. Comparative studies on ex situ and in situ, electrospinning strategies for EMW absorption are conducted. A unique structural evolution mechanism from ZIF-67 to Co nanoparticles is explored. Numerous small Co nanoparticles are evenly distributed on the surface of in situ synthesized Co-CNF (in-Co-CNF) resulting from the collapse of the ZIF-67 framework, whereas the ZIF-67 framework remains on the surface of ex situ synthesized Co-CNF (ex-Co-CNF), encapsulating large Co nanoparticles. A lower reflection loss ( RL ) of −48.6 dB at 6.8 GHz with 3.5 mm is achieved for the in-Co-CNF because of the improved conduction, polarization, and magnetic losses, whereas the ex-Co-CNF only exhibits an RL of −18.3 dB at 9.3 GHz with the same thickness. A radar cross-section (RCS) simulation and a Tesla wireless transmission experiment are conducted to validate the EMW absorption of Co-CNF composites in real applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Weili Ye,Jin Li
Formaldehyde vapor (CH 2 O) is a well-known hazardous gas. Long-term exposure to high concentrations of CH 2 O can cause chronic respiratory diseases in humans and increase the risk of cancers such as leukemia and nasopharyngeal cancer. Zeolite imidazolic frame-67 (ZIF-67) has a high specific surface area and porosity; therefore, it can be used to prepare gas-sensitive materials. In this study, rod-flower-like ZnO was obtained by activation of the rod ZnO using 2-methylimidazole. The ZIF-67-coated rod-flower-like ZnO was then used to synthesize ZnO@ZIF-67 (ZZ67). Experimental and theoretical analyses showed that the ZIF-67 on the ZZ67 surface provided abundant active sites for pure ZnO, which helped to capture target gas molecules more quickly in the experimental atmosphere and realize susceptible detection. Moreover, ZZ67 had a high response (1210) to 500 ppm of CH 2 O at room temperature (~25 ℃), which was 4.8 times the response of activated ZnO (251). Furthermore, owing to the high hydrophobicity of ZIF-67, ZZ67 was mainly unaffected by humidity. Overall, ZZ67 exhibited good selectivity, a high response to CH 2 O, and low sensitivity to high relative humidity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yun Wu,Jinwei Wang,Weiyi Zhang,Qiang Zhao,Jinping Li,Guang Liu
Highly efficient and economical oxygen evolution reaction (OER) electrocatalysts are instrumental in the utilization and storage of renewable sources. Here, we introduce a straightforward method for the in situ growth of sulfur-doped iron oxide (S-FeO x ) and two-dimensional (2D) zeolitic imidazole framework-67 (ZIF-67) nanoarrays on three-dimensional (3D) nickel foam (NF), yielding a 3D S-FeO x /ZIF-67/NF electrocatalyst. The distinctive sheet-like structure and porous framework of S-FeO x /ZIF-67/NF significantly increase the electrochemical active surface area. The prepared S-FeO x /ZIF-67/NF exhibits outstanding electrocatalytic OER activity, achieving a remarkably low overpotential of 236 mV at a current density of 100 mA/cm 2 . Furthermore, S-FeO x /ZIF-67/NF demonstrates the capability to deliver industrial-level large current densities, requiring overpotentials of merely 291 and 334 mV to attain current densities of 500 and 1000 mA/cm 2 , respectively. Moreover, it maintains stable operation for over 80 h at a current density of 1000 mA/cm 2 , with the sheet-like structure remaining intact and no significant activity decay observed. This investigation offers a strategic approach for the systematic development and fabrication of OER electrocatalysts suitable for large current conditions.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Mengjie Yao,Hao Yu,Kai Ding,Zhengyang Du,Wenhui Zhang,Yun Xia,Xiaoying Pan,Wensong Wang,Xiang Liu,Shenjie Li,Yanyan Chen
With a high porosity and highly adaptable topology, ZIF-67 is considered the most promising photocatalyst and has received much attention and development. However, the photoactive electron extraction rate of ZIF-67 is still low, which is a major problem limiting its further development. In this paper, based on the type I structure and using quantum dots (QDs) as the active site, we obtain the QDs@ZIF-67/ZIF-8 heterostructure, which ensures high-yield hydrogen efficiency. Quantum dots, as the transmission site of photogenerated electrons, improve the photogenerated carrier utilization rate generated by the strong absorption ability of ZIF-67 in the visible-light region. Through careful characterization, it was found that the optimal photocatalytic rate of 4999.7 μmol·g–1·h–1, a value 30 times higher than that of QDs, provides an innovative band gap-matching design for adjusting the charge transfer characteristics of QDs with a narrow band gap, which realizes the efficient utilization of visible light.
研究领域:
材料科学
·
能源科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 7
·1142
·
IF 5.719
Mei Wan,Congling Shi,Xiaodong Qian,Yueping Qin,Jingyun Jing,Honglei Che
In this work, a novel functionalization strategy for ZIF-67-modified layered MXene was proposed, aiming at improving the fire safety of thermoplastic polyurethanes (TPU). The ZIF-67@MXene was verified by microscopic morphology, elemental composition, functional group species and crystal structure, and then the successfully prepared ZIF-67@MXene was introduced into the TPU material. When ZIF-67@MXene content was only 0.5 wt%, the peak heat release rate, total heat release rate, peak smoke release rate, total smoke release rate, and CO yield of the TPU/ZIF-67@MXene composites were reduced by 26%, 9%, 50%, and 22%, respectively, compared with the pure TPU. The thermogravimetric tests showed that the residual char of TPU/ZIF-67@MXene composites was the most in all samples. In short, the high-quality carbon layer of TPU/ZIF-67@MXene composites acts as a physical barrier to the transfer of heat and toxic gases, greatly improving the flame retardant properties of the TPU polymer.Keywords:metal-organic framework ZIF-67;MXene;fire safety;thermoplastic polyurethanes
研究领域:
材料科学
·
高分子科学
·
防火工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）