ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Liwei Hou,Xinyue Xu,Zhoujun Zhong,Fengchun Tian,Li Wang,Yi Xu
The demand for the detection of ultralow concentrations of ammonia gas is growing. A bimetallic metal–organic framework (MOF) comprising Prussian blue analogs (PBAs) was used to achieve highly sensitive and stable detection of ammonia gas at room temperature in this study. First, PB was enriched by using ammonia for improved gas sensing properties. Second, a sensitive membrane with more vacancies was formed by partially replacing Fe3+ with Cu2+ through a cation-exchange strategy. Finally, a capacitive sensor was developed for ultralow-concentration ammonia detection using a Cu–Fe PBA sensitive membrane and interdigitated electrodes (IDEs). To investigate the adsorption efficiency of the designed composite sensitive film for ammonia, PBAs nanoparticles were deposited on a quartz microcrystal balance (QCM) via cyclic voltammetry and a hydrothermal method. Approximately 10 ppm of ammonia was adsorbed under 1 atm by the Cu–Fe PBA film prepared using a reaction time of 36 h, and the adsorption efficiency was measured to be 2.2 mmol g–1 using the QCM frequency response. The Cu–Fe PBAs were also tested using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller theory. The introduction of Cu2+ ions significantly increased the specific surface area of Cu–Fe PBAs MOF, and the number of adsorption sites for ammonia also increased; however, its skeleton structure remained similar to that of PB. Then, the capacitive sensor based on Cu–Fe PBA sensitive membrane and IDE was fabricated and the gas sensing detection device was established for ammonia detection. Overall, the developed capacitive sensor exhibits a linear response of 75–1000 ppb and a detection limit of 3.8 ppb for ultralow ammonia concentrations, which makes it superior to traditional detection methods and thus allows excellent application prospects.
研究领域:
材料科学
·
化学传感器
·
环境监测
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产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Fang Xiao,Duan Rongshuai
The content of capsaicin can be used as exotic markers of kitchen recycled oil. In this study, a bimetallic MOF nanocage (FeIII-HMOF-5) was successfully prepared by a one-step solvothermal method and used for electrode modification to prepare a highly sensitive electrochemical sensor for rapid detection of capsaicin. Capsaicin could be selectively immobilized onto the FeIII-HMOF-5 surface during infiltrating adsorption, thus exhibiting very excellent sensing performance. The detection conditions of the sensor were optimized. Under optimum conditions, the electrochemical sensor can linearly detect capsaicin in the range between 1–60 μM with a detection limit of 0.4 μM. In addition, the proposed electrochemical sensor showed excellent stability and selectivity. The real sample tests indicated the proposed electrochemical sensor was comparable to conventional UV spectrophotometry.
研究领域:
食品科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Changfei Liu,Yaoyao Liu,Zhonghua Xiang,Dahuan Liu,Qingyuan Yang
The synthesis of highly efficient and stable CdS composites without noble metals has become a hotspot in the photocatalytic field. Although NiS is an ideal candidate, it remains a challenge to optimize the combination of NiS and CdS to improve the photocatalytic activity for hydrogen evolution. Herein, we have successfully synthesized a CdS@NiS photocatalyst using bimetallic metal–organic frameworks (MOFs) as the precursor. The formation of bimetallic Cd/Ni-MOFs can lead to well-contacted heterogeneous interfaces between CdS and NiS at the nanoscale, efficiently promoting the separation of photogenerated carriers and boosting electron interface transfer. The obtained results demonstrated that CdS@NiS exhibits a high photocatalytic hydrogen evolution rate of 42.7 mmol·g–1·h–1, and the corresponding apparent quantum yield reaches 13.23% at 450 nm, superior to those obtained using the traditional simple physical mixing methods. This work provides a promising strategy for the design of new photocatalysts for hydrogen evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Junning Wang,Mengyuan Bao,Tianxiang Wei,Zhaoyin Wang,Zhihui Dai
An iron-nickel bimetallic metal−organic framework (FeNi-MOF) with inner peroxidase-like activity as a support for enzyme immobilization was synthesized for the first time. And the GOx-mediated synthesis of mimic multienzyme system (GOx/FeNi-MOF) was obtained by a one-step biomimetic mineralization . FeNi-MOF played a dual role of a peroxidase mimic and a protective coating. Therefore, the obtained multienzyme system showed both peroxidase-like activity of FeNi-MOF and the biological activity of natural enzyme . FeNi-MOF acted as a peroxidase mimic, showing a higher affinity for hydrogen peroxide (H 2 O 2 ). The enhanced catalytic activity of the FeNi-MOF may result from synergistic effect between iron and nickel. In addition, the GOx/FeNi-MOF was selected as a proof of concept and succeeded in a one-step colorimetric detection of glucose by tandem catalysis. A small amount of the product was used for glucose detection, and the detection range was 0.3–35 mM, which indicated that our sensor can meet the clinical needs for diagnose diabetes.
研究领域:
生物化学
·
材料科学
·
医学诊断
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DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2025
·
IF 3.1
Li Kaiqian,Zhang Xupeng,Li Xianghong,Chang Qiaowen,Deng Shuduan,Zhu Gang
Introducing novel bimetallic metal–organic frameworks (Cu/Zr-MOF) into wood cellulose scaffolds via an in situ growth strategy represents an effective approach to enhance the fire retardancy of wooden products. This work evaluates the effects of Cu/Zr-MOF loading content embedded in wood composite on the MOF morphology and flame retardancy of natural wood (NW). We discovered that MOF loading has a significant impact on the morphology of Cu/Zr-MOF. Specifically, with an increase in the amount of MOF precursors, the morphological transformation is from spherical to regular octahedra. Furthermore, the incorporation of high MOF loading remarkably enhanced the thermal stability at the early stage and exhibited significantly improved residual content. With 24 mass% loading of Cu/Zr bimetallic MOF, the highly flame-retardant wood composite (Cu-U-W-3) was obtained. Compared to pure NW, the peak heat release rate (pHRR) and total heat release (THR) were reduced to 25.25 W g −1 and 5.0 kJ g −1 , respectively. The limiting oxygen index (LOI) of the treated sample reached 24.81%, showing outstanding self-extinguishing ability. According to the char residue analysis, it was found that Cu-Zr bimetallic MOF anchored on the cell wall exhibited catalytic carbon-forming effect, thereby facilitating the generation of high-quality residual char. The enhanced fire safety of natural wood can be attributed to the oxygen barrier and the reduced heat transfer characteristics of the dense carbon layer. This work presents a novel methodology for the fabrication of bimetallic MOF hybrid flame retardants, with the objective of enhancing the flame retardancy of wooden products.
研究领域:
材料科学
·
防火安全工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Di Tian,Na Song,Mengxiao Zhong,Xiaofeng Lu,Ce Wang
The rational design of metal–organic framework (MOF)-based materials with a huge specific surface area, high redox activity, and favorable conductivity is currently a hot subject for their potential usage in supercapacitor electrodes. Herein, novel bimetallic MOFs with a flowerlike nanosheet structure grown on the electrospun nanofibers (PPNF@M-Ni MOF, M = Co, Zn, Cu, Fe) have been prepared by controlling the incorporation of various types of metal ions, which display superior electrochemical performance. For example, PPNF@Co–Ni MOF possesses a large specific capacitance of 1096.2 F g–1 (specific capacity of 548.1 C g–1) at 1 A g–1 and excellent rate performance. In addition, an asymmetric solid-state device composed of PPNF@Co–Ni MOF (positive materials) and KOH-activated carbon nanofibers embedded with reduced graphene oxide (negative materials) reaches a maximum energy density of 93.6 Wh kg–1 at the power density of 1600.0 W kg–1 and long cycling life. This work may greatly advance the research toward the design of supported MOF-based electrode materials for a promising prospect in energy conversion and storage.
研究领域:
材料科学
·
能源存储与转换
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产品关联
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2024
·
IF 6.4
Zihan Lu,Zhijia Xiao,Jinlong Wang,Zhe Zhao,Jiayuan Huang,Jizhai Cui,Yongfeng Mei,Gaoshan Huang
Noninvasive and real-time detection of bilirubin concentration enables rapid assessment of liver health status and the diagnosis of jaundice-related diseases. Herein, the study proposes a strategy to uniformly grow bimetallic FeCo metal–organic framework (MOF) films onto the surface of carbonized electrospun nanofibers via a stepwise growth strategy involving an induction effect of oxide nanomembrane prepared by atomic layer deposition, to realize high-performance flexible nanofiber bilirubin sensors. Compared with monometallic MOF, the FeCo bimetallic MOF can attain a larger specific surface area, thus augmenting the exposed active sites. Furthermore, the synergistic interaction between the bimetallic active sites on the MOF film and the carbonized nanofibers enhances the electronic conduction network, thereby significantly enhancing the catalytic activity of the flexible electrode for bilirubin. The current nanofibers sensor exhibits excellent performance in bilirubin detection, in terms of high sensitivity, large linear detection range, and low detection limit. The synthesis of bimetallic MOF films on flexible fibers holds promise for the development of highly sensitive electrodes for wearable bilirubin detection devices.
研究领域:
材料科学
·
医学
·
生物传感
✓ 已验证
产品关联
DOI
高影响因子
Arabian Journal of Chemistry
·
2024
·
IF 5.3
Siyuan Zhang,Wenbo Wu,Ya Li,Dongxin Wang,Xiangjun Li,Jisheng Nie,Hong Cui
Metal-organic frameworks (MOFs), as a peroxidase (POD), can catalyze the conversion of H 2 O 2 to reactive oxygen species (ROS) for antibacterial application. To achieve strong antibacterial activity, it is necessary to improve the enzyme-like activity of MOFs. In this study, Fe x CoMOF was synthesized by incorporating Co(II) to improve the electron transfer of Fe(III)/Fe(II), which enhanced its redox capacity as a nanozyme and further promoted the generation of hydroxyl radical (⋅OH), exhibiting higher POD activity. Doping with different amounts of Co(II) altered the particle size, specific surface area, and surface defects of Fe x CoMOF, thus exhibiting differential enzyme-like activities. Additionally, a glucose-responsive enzyme cascade reaction system based on Fe 4 CoMOF/glucose oxidase (GOx) was established. In the presence of glucose, the in situ -generated substrate H 2 O 2 was in contact with the catalytic site and the generated gluconic acid enabled Fe 4 CoMOF to maintain maximum enzyme activity under physiological pH conditions, avoiding damage caused by the use of exogenous high concentrations of H 2 O 2 . In the in vitro antibacterial experiment, the minimum inhibitory concentration (MIC) of Fe 4 CoMOF/GOx was 10 μg mL −1 for Escherichia coli ( E. coli ) and 5 μg mL −1 for Staphylococcus aureus ( S. aureus ) (∼10 8 CFU mL −1 ). The increase in enzyme activity resulted in a considerable reduction in the dose of the antibacterial agent, which was conducive to improving bio-safety. The in vivo experiment in mice demonstrated that the glucose-responsive Fe 4 CoMOF-based cascade reaction system had excellent antibacterial properties and remarkably promoted wound healing. The antibacterial agent based on bimetallic MOF developed in this work provides a new idea for cascade catalytic antibacterial therapy and will have remarkable application prospects in biomaterials and nanomedicine.
研究领域:
生物材料
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纳米医学
·
微生物学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Junjie Ma,Wei Li,Xiaoqi Lan,Zheng Liu,Fenghai Zhou,Mingjun Lu,Guo-Cheng Han
The Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite was prepared based on nitrogen-doped porous carbon materials containing cobalt (Co/N-PC), which is obtained through high-temperature pyrolysis of bimetallic Co/Zn-MOF. The electrochemical test results showed that the discharge specific capacity of Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite was 126.66 mAh/g at 0.1C, an increase of 15.6 % compared with Na 3 V 2 (PO 4 ) 2 F 3 /N-PC(109.56 mAh/g). The capacity retention rate was 91.84 % after 100 cycles and the R SEI of the Na 3 V 2 (PO 4 ) 2 F 3 /Co/N-PC composite (48.62 Ω) outperforms that of the Na 3 V 2 (PO 4 ) 2 F 3 /N-PC composite (81.55 Ω). This work applied the metal/carbon hybrid materials obtained through high temperature pyrolysis of bimetallic organic frameworks were employed in sodium-ion batteries, thereby offering enhanced potential for the advancement of sodium-rich phosphoric acid modified materials.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 35
·17004-17015
·
IF 3.925
Weixing Liu,Wei Duan,Qiang Zhang,Xianjin Gong,Jinlei Tian
Pollution of freshwater caused by organic compounds, especially nitro aromatic compounds and rhodamine B, has aroused deep concern about the sustainable development of the earth in the past decades. Employing 2D Zn-MOF-Ru(cptpy)2 as the original material and dicyandiamide as the nitrogen dopant, a variety of novel N-doped carbon supported Ru nanoparticle materials (Ru-NC) have been successfully synthesized through one-step pyrolysis in a nitrogen atmosphere. Impressively, the introduced dicyandiamide can effectively enhance the catalytic activity of Ru-NC towards 4-NP reduction. The as-obtained Ru-NC-15 catalyst demonstrated an excellent catalytic performance towards nitro aromatic compound and rhodamine B reduction with conversions of more than 99%. Further investigations highlighted that the Ru-NC-15 catalyst possesses favorable catalytic stability and broad substrate applicability. The catalytic activity of the Ru-NC-15 catalyst did not decrease significantly after at least 5 times of continuous use, and it had a high conversion for various nitro aromatic compounds. The mass-normalized rate constants of the Ru-NC-15 catalyst were 2675 min−1 g−1 and 1830 min−1 g−1 towards 4-nitrophenol reduction and rhodamine B reduction, respectively, surpassing many catalysts previously reported in the literature. This work inspired the development of a MOF-derived heterogeneous catalyst for the catalytic reduction of nitro aromatic compounds and rhodamine B contaminants.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Senyang Song,Xiaoyan Ma,Wenyue Li,Boyuan Zhang,Bo Shao,Xiaoyu Chang,Xiaoju Liu
With the development of power supplies for wearable devices , electrode materials with dual functions have received extensive attention. Herein, we report a strategy of preparing stylophora coral-like Ni/Co bimetal metal organic framework (MOF) with furan-based derivatives as ligands through the simple solvothermal method, which can be utilized as a dual-function electrode material to build supercapacitors and non-enzymatic glucose sensing. It can be found that the high molecular stacking properties of the rigid furan ring skeleton combined with the unique stylophora coral-like morphology can greatly improve the charge transfer efficiency of the electrode reaction process, and the structure of the bimetallic node can effectively adjust the three-dimensional electronic structure, making high capacitive performance during charge storage. The specific capacitance of the furan-based bimetallic MOF material is as high as 531 C g −1 at a current density of 1 A g −1 with a high capacitance retention rate of 83.4% after 5000 cycles. In addition, the glucose sensing performance is analyzed and an outstanding sensitivity value of 366 µA mM −1 cm −2 is achieved with a low limit of detection (2 μM). The as-synthesized furan-based bimetallic MOF material is a promising candidate for electrochemical supercapacitors and efficient glucose detection.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Fuhuai Cao,Xinlong Zhang,Yaya Wang,Moran Chen,Xinqi Hu,Mengkun Zhou,Rongmei Liu
The design of nanostructured electrode materials and the tuning of their components is one of the effective ways to improve the electrochemical properties of the materials. Here, we employed a cost-effective hydrothermal synthesis method to successfully construct NiFeSe@NiFe-MOF electrode materials with nanocoral rod-like structures. The unique coral rod-like structure provides a larger specific surface area for electron storage, exposing more electrochemical reaction active sites on the electrode surface. Through DFT theoretical calculations we found that the metallic property of NiFeSe@NiFe-MOF-2 are greatly enhanced compared with NiFe-MOF, which can lead to higher conductivity and electron transfer efficiency of the selenized material. Moreover, the introduction of selenium enhances the adsorption capacity of the material for anions in alkaline solution, which makes the structure of the MOFs more stable and obtains better electrochemical reversibility making the electrochemical performance of the electrode material in all aspects. Compared with the NiFe-MOF material, NiFeSe@NiFe-MOF-2 has excellent capacitance retention up to 81.0 % at different current densities (1 A/g-10 A/g), and the stability of the cycle performance is greatly improved up to 84.0 %. The assembled device NiFeSe@NiFe-MOF-2 // AC has excellent multiplication performance up to 92.7 % and stable electrochemical cyclability up to 99.7 %. Moreover, the energy density is 61.0 Wh kg −1 at a power density of 5060.0 W kg −1 . The coral rod-like NiFeSe@NiFe-MOF composites synthesized in this experiment possessed excellent charge storage capacity and stability properties. These results indicate that the electrode materials developed in this paper have good application prospects in supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
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