APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Can Fang,Xiangmei Tang,Qingfeng Yi
Exploring efficient non-precious metal oxygen electrocatalysts for oxygen reduction/evolution reactions (ORR/OER) is of great importance in electrochemical energy conversion devices like metal-air battery. Among them, carbon-based composites derived from metal-organic framework (MOF) exhibit excellent catalytic performance in ORR/OER. In this paper, Co-MOF-67 was firstly prepared, and then mixed with FeCl 3 ·6 H 2 O and dicyandiamide, followed by a one-step pyrolysis to obtain bamboo-like nitrogen-doped carbon nanotubes . For the samples, Fe and Co nanoparticles were encapsulated in the front end of the carbon nanotubes and the presence of new (n)-diamond carbon was unexpectedly found. The obtained catalyst (FeCo@CNTs-60) has an onset potential of 1.04 V for ORR in alkaline solution, which is close to the commercial Pt/C (40 wt% Pt) of 1.05 V. The onset potential of 1.02 V in quasi-neutral solution exceeds that of Pt/C of 0.99 V. In addition, FeCo@CNTs-60 exhibited a low potential difference of 0.81 V between OER and ORR potentials. The alkaline zinc-air batteries, fabricated with the sample as the electrocatalyst of air electrode, exhibit higher peak power density and stability than Pt/C, while the rechargeable batteries present superior cycling discharge/charge stability at 5 mA·cm −2 and 10 mA·cm −2 . In particular, the battery with FeCo@CNTs-60 was conducted for continuous over 1300 h of ultra long-term cycle charging / discharging test at a current density of 5 mA·cm −2 , and it reveals excellent stability with high voltage efficiency and also presents superior cycle charging / discharging stability after replacing the Zn plates and electrolyte.
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
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Xinai Zhang,Xueyue Huang,Zhuanlong Wang,Yang Zhang,Xiaowei Huang,Zhihua Li,Maria Daglia,Jianbo Xiao,Jiyong Shi,Xiaobo Zou
Pesticide residual has always been a severe environmental issue due to its adverse effects on ecosystems. The development of user-friendly program is imperative for efficient monitoring and control of pesticides with respect to environmental protection. To this end, we herein report a bioinspired nanozyme enabling portable glucometer readout for assessing pesticide residual, based on an aptamer-switching approach. Notably, Co-based metal–organic framework (Co-MOF) decorated by aptamer is built, as a signal probe, for identifying acetamiprid (as a model analyte). Comparing with the enzyme-based methods, which works in pH 6 ∼ 7, our system has high stability and DNA hybridization efficiency beyond pH 8. By introducing completive binding between acetamiprid and MOF-aptamer into glucose consumption, this method exhibits a wide linear range (1 ∼ 200 nM) with a low limit of detection (0.42 nM, corresponding to 0.093 μg kg −1 by weight), well qualified for the regular monitoring of acetamiprid residue specified by World Health Organization. With virtues of portability, sensitivity and anti-interference, the glucometer-based protocol enables us to innovatively carry out pesticide monitoring in agricultural soil, water source and foodstuffs, thereby holding promise for environmental monitoring in home-style and in-field scenarios.
研究领域:
环境科学
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分析化学
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纳米技术
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农业科学
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DOI
高影响因子
Journal of Water Process Engineering
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2024
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IF 6.3
Zahira Bano,Muhammad Akram,Naveed Zafar Ali,Muhammad Usman Khan,Fengyun Wang,Linrui Li,Mingzhu Xia
In this research, a novel composite of maleic acid derived 3D porous graphene and zeolatic imidazolate framework (ZIF-67) was developed by using one step in-situ preparation method. The synergistic impact of ZIF-67 embedded on 3D porous graphene network enhances the adsorption capacity of the organic dyes (Congo Red and Methylene Blue). The obtained structured composite material possesses macroporous and mesoporous channels up to 14.42 nm with enhanced morphological stability. The resultant 3DPGZF composite exhibits the maximum adsorption capacity towards the CR (589.46 mg g −1 ) and MB (350.79 mg g −1 ), with a removal rate of 100 % within 50 min. The kinetic study and isothermal analysis showed that pseudo second-order-kinetic model and non-linear form of the Freundlich isotherm model were more fitted with adsorption data. The adsorption of CR and MB occurred spontaneously and exhibited an endothermic nature. The DFT studies and characterization after utilization of the composite demonstrated that electrostatic attractions, pi-pi interaction, pore filling and surface binding reactions were the primary forces of the sorption process. The after adsorption XPS, FTIR, TEM and XRD results revealed that the prepared composite 3DPGZF is highly stable and was successfully regenerated multiple times without deforming its internal structure and morphology.
研究领域:
材料科学
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环境科学
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理论化学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Ran Jiang,Dengjie Zhong,Yunlan Xu,Haixing Chang,Pengfei Liao,Yuanzhen He,Jiayou Zhang
How to improve the issues of ion agglomeration and metal ion leaching, and how to prepare cobalt-based catalysts with high reactivity and stability, are highly desired yet challenging. In this paper, MoS 2 modified Co-MOF derived nitrogen-doped carbon (Co/PCN/MoS 2 ) microspheres rich in active sites were prepared using a simple carbonation-hydrothermal method, with g-C 3 N 4 , MoS 2 and Co-MOF to overcome the aforementioned limitations. The flower-like nanostructure of MoS 2 contributed to exposing more marginal active sites, allowing the high dispersion of Co-MOF within its structure. Meanwhile, Mo 4+ /Mo 6+ and S species coexisted in MoS 2 , which promoted the valence cycle and electron transfer process, and improved the catalytic activity of the composite. The successful synthesis of Co/PCN/MoS 2 was proved by XRD , SEM and FTIR characterizations. The electrochemical performance analysis showed that Co/PCN/MoS 2 exhibited higher redox capacity than MoS 2 , and Co/PCN/MoS 2 /PMS system achieved the degradation rate of RhB as high as 97.19% within 30 min, which is higher than that of Co-MOF/g-C 3 N 4 /PMS (80.67%), Co-MOF/MoS 2 /PMS (78.08%), Co-MOF/PMS (77.00%), g-C 3 N 4 /PMS (53.68%) and MoS 2 /PMS (28.10%) systems. It had good anti-interference ability against coexisting substances, achieved good degradation performance in a wide pH range (pH 2.0–10.0), and possessed excellent stability and reusability with RhB degradation rate of 91.10% after 5 cycles. The quenching test confirmed that non free radical 1 O 2 is the main ROS for RhB degradation. This work is expected to provide a new idea and direction for the design and development of metal-doped heterogeneous catalysts with high activity and stability.
研究领域:
环境科学
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催化材料
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DOI
高影响因子
MOLECULES
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2025
·Vol. 30
·期 24
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IF 4.6
Shuyue Pang,Lina Chen,Yangyuxin Liu,Xiuting Lu,Hongfei Liu,Yuting Shu,Helong Bai,Jing Wang,Dongfang Shi
Mancozeb (MCZ), a widely used fungicide in agricultural production, has been reported as an environmental endocrine disruptor, posing serious risks to ecosystems and human health. In this work, multivalent Co-MOF nanozymes (MVCM) with excellent oxidase-like activity were synthesized, which can promote the oxidation of 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) into a blue oxidative product (ABTS•+), with an obvious absorption peak at 415 nm. With the addition of MCZ, the ABTS•+was reduced to colorless ABTS through the REDOX reactions between MCZ and ABTS•+. Based on the unique reducing behavior of MCZ, a nanozyme-based colorimetric detection platform was proposed for the detection of MCZ, with a linear range of 3–27 μM and a detection limit (LOD) of 0.15 μM. Furthermore, the sensor was integrated with smartphones and test strips, establishing a portable smartphone-based platform for the real-time, on-site, and visual quantitative detection of MCZ. The detection concentration range was 15–90 μM, with LOD as low as 15 μM. The assay exhibited high adaptability in practical applications. In summary, this work provided a simple, accurate, and low-cost approach for visual determination of MCZ without complicated instruments and procedures.
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
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2026
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IF 2.6
Siyu Sun,Yifan Zhang,Jun Wu,Rui Yan,Feng Zhang,Chen Wen
The selective electrocatalytic oxidation of glycerol (GOR) into high-value chemicals is crucial for sustainable biorefineries, yet achieving high selectivity, particularly for C1 products like formic acid, remains a significant challenge. Herein, we report the rational design and facile one-step hydrothermal synthesis of ZrO2@Co-MOF heterostructures, where ZrO2 nanoparticles act as core sites influencing Co-MOF growth. The optimized ZrO2@Co-MOF(0.11) catalyst exhibits unprecedented performance for GOR, achieving 98.7% selectivity and near-unity faradaic efficiency for formic acid production at industrially relevant current densities, alongside excellent long-term stability. Comprehensive electrochemical evaluations, ex situ characterization methods, and in situ/operando spectroscopic investigations reveal a pivotal innovation: the ZrO2 interface not only modulates the electronic structure of Co centers and tailors MOF morphology but, critically, directs and stabilizes the in situ electrochemical reconstruction of the Co-MOF into highly active CoOOH/Co(COO)2 species. Furthermore, theoretical calculations elucidate that this engineered interface significantly lowers the energy barrier for critical C–C bond cleavage (ΔG = 0.03 eV), thereby suppressing C3 intermediates and driving the reaction pathway selectively toward formic acid. This work unveils a powerful strategy in hetero-interfacial engineering of MOF-derived materials for precise and efficient biomass valorization.
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
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IF 4.3
Junling Chen,Heng Zhang,Qiang Liu,Qiaonan Yu,Qianxiang Zhao,Hanqing Lin,Rong Liang,Keliang Wu,Tiexin Zhang
Bimetallic metal–organic frameworks (MOFs) have attracted broad interest in electrocatalysis due to their synergistic effects in lowering water-splitting overpotentials. Herein, we fabricated CoRu-TDC@NF nanobelts via a facile ion-exchange strategy. The resulting material exhibited a well-defined nanobelt morphology and a bimetallic electronic structure. Combined spectroscopic and DFT analyses revealed that Ru doping induced electron accumulation at Co sites, downshifted the d-band center, and optimized the hydrogen adsorption free energy, thereby accelerating reaction kinetics. Electrochemical tests in 1.0 M KOH showed outstanding bifunctional activity, with overpotentials of 68 mV for HER at 10 mA cm −2 and 234 mV for OER at 50 mA cm −2 . A two-electrode electrolyzer using CoRu-TDC@NF achieved 10 mA cm −2 at only 1.33 V for overall water splitting, highlighting its practical potential. This work offers a scalable route to designing efficient MOF-based electrocatalysts through electronic structure modulation
研究领域:
材料科学
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电化学
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催化
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能量转换
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纳米材料
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产品关联
DOI
高影响因子
SYNTHETIC METALS
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2025
·
IF 4.6
Ran Xu,Man He,Haoyuan Li,Shuangjiang Feng,Yongjuan Wang,Xiaohai Bu,Yuming Zhou
The strategy of customizing MOF-derived electromagnetic wave (EMW) absorbing materials through the construction of precursor size has become a new research direction. While exploring the dimensional adaptability of Co-MOF derivatives in graphene hybrid aerogel for electromagnetic wave absorption is not widely researched, manipulating the compositions and microstructures of EMW absorbing materials has been found to afford superior EMW absorption. Herein, a series of Co-N/C@graphene hybrid aerogel (CNGA) were successfully synthesized by integrating graphene and multi-scale Co-MOF derivatives which are derived from multi-scale Co-MOF precursors. The results displayed the CNGA containing nanoscale Co-MOF derivatives at a 20 wt% filler ratio exhibited the optimal reflection loss (−46.8 dB, 2.7 mm) and the maximum effective absorption bandwidth (5.3 GHz, 2.1 mm). The exceptional EMW absorption properties are credited to the collaborative impact of distinctive loss mechanisms benefited from the small particle size of Co-MOF derivatives in CNGA and appropriate filler ratio. This work demonstrates the correlations between the size of Co-MOF derivatives and electromagnetic parameters of CNGA, and provides a guidance for the development of advanced hybrid aerogel electromagnetic wave absorbing materials.
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高影响因子
FUEL
·
2024
·
IF 6.7
Nimra Muzaffar,Imad Barsoum,Amir Muhammad Afzal,Muhammad Waqas Iqbal,Zubair Ahmad,Areej S. Alqarni,Shams A.M. Issa,H.M.H. Zakaly
Monosodium glutamate (MSG), a sodium salt that comes from a non-essential amino acid, is generally employed as a flavor accompaniment in numerous diet recipes. Metal oxides containing oxygen vacancies present a potential opportunity for utilization as charge storage materials in supercapattery applications. This work illustrates the fabrication of the MoLa 2 O 4 @Co-MOF@rGO nanocomposite via a combination of hydrothermal and modified Hummer methods. The structure of the fabricated MoLa 2 O 4 @Co-MOF@rGO nanocomposite was assessed by utilizing scanning electron microscopy (SEM), whereas the structural analysis was conducted via X-ray diffraction (XRD). The superior electrochemical parameters of the MoLa 2 O 4 @Co-MOF@rGO nanocomposite over pure MoLa 2 O 4 and MoLa 2 O 4 @Co-MOF were ascribed to the combined effect of MoLa 2 O 4 , Co-MOF, and rGO. The specific capacitance (Cs) of 310.1 Fg −1 was achieved for MoLa 2 O 4 and 626.8 Fg −1 for MoLa 2 O 4 @Co-MOF. Among all samples, the MoLa 2 O 4 @Co-MOF@rGO electrode demonstrates an extraordinary Cs of 1716 Fg −1 at 3 mVs −1 . The energy storage mechanism is explained using the using Randles–Ševčík and Dunn’s models. The MoLa 2 O 4 @Co-MOF@rGO//activated carbon (AC) asymmetric supercapacitor configuration demonstrates the Cs of 1470 Fg −1 at 3 mVs −1 along with a particular energy of 58 Whkg −1 and a power density (P d ) of 2500 Wkg −1 . A MoLa 2 O 4 @Co-MOF@rGO nanocomposite-based amperometric immunosensor was designed to detect monosodium glutamate (MSG). A linear relationship was consistently detected between MSG concentration and the associated current change across the complete detection range of 0.05–200 μM. The multifunctional MoLa 2 O 4 @Co-MOF@rGO ternary nanocomposite electrode material opens up new prospects for designing hybrid devices in energy harvesting and food-related applications.
研究领域:
材料科学
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电化学
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食品安全检测
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xueying Shan,Qixin Huang,Jiao Gao,Hanchao Liu,Jingru Wang,Jinchun Li
The design of low-smoke and low-toxicity epoxy resin (EP) composite materials remained a significant challenge. In this study, a multifunctional MOF-based flame retardant (TP-P-Co-MOF) was synthesized using ZIF-67 as the framework via a three-step modification process. TP-P-Co-MOF incorporated Schiff base-conjugated structures, Co P synergistic flame-retardant sites, and a porous architecture, while exhibiting excellent compatibility with EP. At a 4 wt% loading, the EP/TP-P-Co-MOF composite attained a UL-94 V-0 classification and an LOI of 31.3%. Additionally, in comparison with EP, the EP/TP-P-Co-MOF composite exhibited marked reductions in the peak heat release rate (PHRR), total heat release (THR), peak smoke production rate (PSPR), and total smoke production (TSP), which decreased by 43.1%, 14.9%, 64.0%, and 52.6%, respectively, thereby demonstrating outstanding flame-retardant efficiency and toxic-smoke suppression performance. Investigation of the flame-retardant mechanism indicated that TP-P-Co-MOF not only significantly improved the quality of the graphitized carbon layer in EP, but also reduces the concentration of combustible gases, thereby exerting synergistic flame-retardant effects in both the condensed and gas phases. With respect to mechanical properties, the incorporation of TP-P-Co-MOF improved both the toughness and strength of the EP. The tensile strength and impact strength increased by 11.1% and 24.7%, respectively, in comparison with neat EP. This study provided a promising strategy for developing highly efficient MOF flame retardants while offering a novel approach to designing low-smoke, low-toxicity flame-retardant EP.
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高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Jiuhong Zhao,Junjie Tian,Haozheng Jiao,Shuowen Wang,Sitong Jin,Guixia Ling,Peng Zhang
Abstract Metal−organic framework (MOF)-based nanozymes have emerged as promising alternatives to natural enzymes for catalytic sensing due to their tunable porous architectures and abundant active sites. Nevertheless, the practical implementation of pristine Co-MOF nanozymes is severely hindered by intrinsic catalytic activity attenuation, poor structural stability, and unavoidable aggregation issues. In this work, a triple synergistic interface engineering strategy is proposed to fabricate high-performance and recyclable composite nanozymes via Prussian blue (PB) modification, polyvinyl alcohol (PVA) aerogel immobilization, and DNAzyme functionalization. The introduction of PB with self-amplifying catalytic behavior effectively optimizes the redox reaction kinetics of the Co-MOF, significantly boosting its peroxidase-like catalytic activity and structural durability. The three-dimensional porous PVA aerogel serves as a versatile supporting matrix, which not only uniformly disperses PB-modified Co-MOF nanocomposites to eliminate particle aggregation and catalyst waste but also endows the composite with excellent recoverability and cyclic usability. Furthermore, the integration of the hemin/G-quadruplex DNAzyme constructs a multilevel catalytic interface, which synergistically enhances the catalytic efficiency and environmental adaptability of the aerogel-based nanozyme system. Benefiting from the structural superiority and multi-component synergistic catalysis, the optimized DNAzyme@PB/Co-MOF PVA aerogel sensing platform achieves sensitive, stable, and visual detection of the total antioxidant capacity. This work systematically explores the mechanisms of multi-scale composite nanozymes, providing a feasible and universal strategy for the rational design and fabrication of high-stability, high-efficiency, and recyclable MOF-based functional catalytic materials for advanced sensing applications.
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2026
·
IF 4.1
Gao Haonan,Wen Mingzhen,Li Jiali,Hou Shili,Li Lifen,Liu Guangyan
This work develops an in situ electrodeposition strategy to construct a honeycomb-like Ni/Co-MOF/MXene heterojunction directly on the glassy carbon electrode (GCE) surface at −1.3 V vs. Ag/AgCl, enabling ultrasensitive enzymatic electrochemical detection of trace urea. The high catalytic activity of Ni/Co-MOF and the superior conductivity of MXene were synergistically integrated in a 3D hierarchical heterostructure. Compared with traditional modification methods, this strategy significantly enhances the kinetics of electron transfer and the stability of urease immobilization. Characterized by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS), the heterojunction exhibits unique morphology and outstanding electroconductivity. Furthermore, the resulting Ni/Co-MOF/MXene/urease/GCE biosensor achieves a wide linear range of 1.0 × 10 –6 –1.0 × 10 –4 mol L −1 with a low detection limit of 4.9 × 10 –7 mol L −1 . The biosensor has been applied to the detection of practical samples, where the recoveries were 99.3–102.8% with a relative standard deviation (RSD) of 2.9–3.3%, which indicates that this biosensor has good practical applications and prospects for further development.
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PubMed
高影响因子
危险品化学品经营许可证（带存储）