Analytical Methods
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2024
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IF 2.7
Wenxia Xue,Jihong Fu,Yaxue Zhang,Shuxian Ren,Guoqi Liu
Surface-enhanced Raman scattering (SERS) enables pesticide residue monitoring to become facile and efficient. In this study, a core–shell structured gold nanoparticles@ZnCo metal–organic framework (AuNPs@ZnCo-MOF) SERS substrate was designed and successfully synthesized for efficient and selective detection of thiram. The bimetallic ZnCo-MOF shell can not only enrich the targeted molecules in the electromagnetic field because of its excellent absorptive capacity, but also act as a stabilized matrix for protecting the AuNPs from aggregation. The AuNPs@ZnCo-MOFs exhibited a high enhancement factor (EF) of 3.51 × 106 and a low detection limit of 1 × 10−7 mol L−1. Besides, the substrate material showed exceptional stability for up to 28 days at room temperature. The AuNPs@ZnCo-MOFs were used to detect thiram which displayed wide linearity (1 × 10−7 to 1 × 10−4 mol L−1) and high recoveries (83.45–99.61%). Moreover, the AuNPs@ZnCo-MOF SERS substrate exhibited excellent anti-interference ability and size selectivity for the target molecules. These indicate that the AuNPs@ZnCo-MOF substrate has great potential for the detection of thiram residues in practical applications.
研究领域:
分析化学
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
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2020
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IF 3.687
Haifu Zhang,Xinhuan Lu,Lu Yang,Yin Hu,Mengyue Yuan,Chenlong Wang,Qingrui Liu,Fanfan Yue,Dan Zhou,Qinghua Xia
To date, it was difficult to develop catalytic systems for activating O 2 in the absence of initiator and sacrificial co-reductant for high-efficiency epoxidation of olefins under mild conditions. Herein, different compositions of ZnCo-MOF have been prepared via a dry-gel crystallization method, which were used to catalyze the epoxidation of α-pinene with air at 90 °C. Zn 0.1 Co 1 -MOF-D2-24 performed the best catalysis activity to give 95.5 % α-pinene conversion and 96.7 % epoxide selectivity. The epoxidation results showed that Zn and Co could effectively activate air to epoxidize α-pinene in high efficiency. This bimetal catalytic effect was assigned to the contribution of interacted lattice Zn and Co ions embedded into crystalline MOF framework with similar electronic structure and ion radius, which avoided the use of organic peroxide initiators and other co-reducing agents. Under anhydrous conditions, Zn 0.1 Co 1 -MOF-D2-24 showed stable catalytic activity in the epoxidation of α-pinene with air by at least six recycles.
研究领域:
化学
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材料科学
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催化反应
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2024
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IF 4
Deyu Qin,Boyang Zhou,Zhifang Li,Changlong Yang
Supercapacitors, as new electrochemical energy storage (EES) devices, with the lower energy density seriously hinder their realization of the requirements for future high energy storage devices. Thus, It is crucial to develop straightforward and efficient approaches to address the aforementioned challenges in future EES devices. In this paper, controllable multi-component composites are designed and ZnO is used as a conductive carrier in preparing layered structured ZnO-Zn/Co-metal-organic framework-polyaniline (ZnO-Zn/Co-MOF-PANI, ZZCMP) electrode materials by solvothermal and electrodeposition methods. The abundant active sites and the high specific surface area of the MOF are used to create the conditions for the loading of PANI, while it can establish an effective ion/electron transport channel with PANI to enhance the material utilisation and the electrochemical performance of the overall material. Add to that, the advantages of flexibility and rigidity of pristine MOF are made use of to provide sufficient space during the process of long-term charging and discharging, thus facilitating resistance to the structural deformation and enhancing the mechanical stability of the material. The optimized integrated electrode ZZCMP-10 exhibits a capacitance of 458.9 F . g − 1 when operated at a current density of 1 A . g − 1 . The asymmetric supercapacitor (ASC) is constructed with ZZCMP-10 as the positive electrode material and active carbon is used as the material for the negative electrode, which shows an energy density of 26 Wh . kg −1 at a current density of 1 A . g − 1 and a retention of 75.3 % capacitance is achieved after 5000 cycles of long-term charging and discharging. This study provides a reasonable exploration for designing high-energy-density electrochemical energy storage devices.
研究领域:
材料科学
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能源存储技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Qianqian Ju,Mengying Du,Guoqing Zu,Liang Gao,Xijia Yang
As a key component of wearable electronic devices, the human–computer interaction system is of great significance for realizing intelligent life. This study develops a smart sensing system with a flexible and stretchable single-electrode triboelectric nanogenerator (NZ-TENG) integrated touch sensing device and a voltage and current (UI) interaction interface. The NZ-TENG is composed of a conductive sponge coated with silicone rubber doped with NiMoO 4 /ZnCo MOF (350) (NZ) hybrid nanoparticles, effectively improving the friction layer’s charge generation ability. When the NZ concentration is 0.05 wt% and the silicone rubber thickness is 2.0 mm, the NZ-TENG achieves excellent output performance, with open-circuit voltage, short-circuit current, and output power density reaching 150 V, 8 μA and 1313 mW m −2 respectively. This touch-sensing device has excellent tensile strength, hydrophobicity, safety, and skin-friendliness. The developed UI interaction interface provides various flexible rehabilitation training modes, targeting the patient’s specific conditions for training. This assembled intelligent human–computer interaction has highly efficient biological signal monitoring and feedback, showing great potential for application in the field of rehabilitation medicine.
研究领域:
材料科学
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生物医学工程
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智能设备
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Yanqin Wang,Huagao Wang,Jinhong Ye,Liyi Shi,Xin Feng
Magnetic quantum dot (QD)-like CoFe alloy@C nanocomposites derived from ZnCo-MOF using low-dimensional carbon as carriers for electromagnetic wave (EMW) absorption were successfully synthesized by in situ growth and pyrolysis. The resulting CoFe@C nanocomposites were homogeneously conjoined with different carbon supports such as two-dimensional (2D) reduced graphene oxide (rGO) and one-dimensional (1D) carbon nanotubes (CNT). Results indicated EMW absorption properties of CoFe@C were enhanced by introduction of rGO and CNT as carbon hosts for the construction of conductive networks due to the excellent impedance matching and electromagnetic attenuation. The rGO-supported CoFe@C composites annealed at 900 °C (rGO-CoFe@C-900) revealed a minimum reflection loss (RL min ) of −36.08 dB at the sample thickness of 3.0 mm and an effective bandwidth (RL < −10 dB) of 5.17 GHz at 3.5 m. Moreover, the CNT-supported CoFe@C nanocomposites pyrolyzed at 900 °C (CNT-CoFe@C-900) exhibited optimum EMW absorption performances due to the continuous 3D conductive networks, RL min of −40.00 dB with the thickness of 3.0 mm, and effective absorption bandwidth reached 5.62 GHz with a thickness of 2.0 mm. In particular, the specific reflection loss values of the resulting nanocomposites significantly preceded that of the reported similar dielectric-magnetic hybrids. In view of the superior EMW absorption properties, the as-fabricated low-dimensional carbon-supported magnetic quantum dot-like (QD-like) CoFe alloy@C composites will be utilized as ideal candidates for high-efficient EMW absorption.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2021
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IF 9.229
Lu Yang,Haifu Zhang,Peipei Tao,Xinhuan Lu,Xixi Li,Chenlong Wang,Beibei Wang,Fanfan Yue,Dan Zhou,Qinghua Xia
Here, we report the synthesis of spherical bimetal ZnCo-MOF materials by a hydrothermal rotacrystallization method and their catalytic activity on the air epoxidation of mixed biolefins enhanced by microwaves. The structural and chemical properties of the ZnCo-MOF materials were fully characterized by XRD, IR, SEM, TG, XPS, and NH3-TPD. The morphology of the material exhibited a three-dimensional spherical structure. From an NH3-TPD test of the ZnCo-MOF catalyst, it could be concluded that the Zn0.1Co1-MOF-H-150 rpm material had the highest acidic content and the strongest acidity among the catalysts synthesized by different methods, which gave the best performance in the epoxidation of mixed biolefins. The air epoxidation reaction was carried out under atmospheric pressure and microwave conditions, in the absence of any initiator or coreducing agent. Moreover, the Zn0.1Co1-MOF catalyst could be recycled six times without reducing the catalytic activity significantly, which showed the stability of spherical catalyst material under microwaves.
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DOI
PubMed
高影响因子
SOLID STATE SCIENCES
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2026
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IF 3.6
Jiajia Cui,Yueyue Sun,Chaofan Yin,Zixuan Xue,Xiaoyu Shen,Hao Wang,Junkai Wang,Kai Wu,Jun Zhou
In situ growth of ZnCo MOF on 3D-flower like Bi 2 WO 6 is developed for enhancing photocatalytic degradation. • The novel flower-like structure the surface-grown MOF achieved a 99.1% degradation of rhodamine B within 1 h. • The structure causes narrowed the band gap and synergistic charge separation for almost complete photodegradation. Herein, a novel 3D flower-like ZnCo MOF-modified Bi 2 WO 6 is first fabricated via a simple solvothermal approach and applied for complete rhodamine B (RhB) photocatalytic degradation. First, granular flower-shaped BWO and cubic MOF are synthesized. The crystal structure, microscopic morphology, and surface element distribution of these materials are characterized, and their photocatalytic degradation performance toward RhB is evaluated. To clarify the feasibility of modifying the optical catalytic performance of BWO by MOF, a synergistic BWO-MOF composite photocatalyst was prepared, and an extremely high efficiency of 99.1% in the degradation of Rhodamine B within 1 h is achieved. Photoelectrochemical measurements are performed to verify the enhanced separation and transfer of photogenerated charges. Meanwhile, a plausible visible-light-driven photocatalytic degradation mechanism for the BWO/MOF system is proposed, which provides a theoretical basis for regulating photogenerated charge separation and achieving efficient photocatalytic degradation. Fig . (a) Schematic illustration of possible photocatalytic mechanism of the BWO/MOF photocatalyst over RhB degradation process under visible light irradiation. TEM (b) and HR-TEM of BWO/MOF photocatalyst. Download: Download high-res image (320KB) Download: Download full-size image
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DOI
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Ruonan Sun,Shuang Han,Wei Zong,Hongtao Chu,Xunan Zhang,Haiyan Jiang
The chlortetracycline (CTC) residue in food poses a threat to human health. Therefore, developing sensitive, convenient and selective analytical methods for CTC detection is crucial. This study innovatively uses tin disulfide/bimetallic organic framework (SnS 2 /ZnCo-MOF) nanocomposites in conjunction with gold nanoparticles (AuNPs) to co-modify a glassy carbon electrode (GCE). Further, a molecularly imprinted polymer (MIP)-based electrochemical sensing platform Au-MIP/SnS 2 /ZnCo-MOF/Au/GCE (AZG) was fabricated for selective CTC detection. SnS 2 /ZnCo-MOF enhanced the stability and surface area of the AZG sensor. The presence of AuNPs facilitated electron transport between the probe and the electrode across the insulating MIP layer. The fixation of AuNPs and MIP via electropolymerization enhanced the selective recognition of this sensor and amplified its output signal. The AZG sensor demonstrated a wide linear detection range (0.1–100 μM), low detection limit (0.072 nM), and high sensitivity (0.830 μA μM −1 ). It has been used for detecting CTC in animal-origin food with good recovery (96.08%–104.60%).
研究领域:
食品安全检测
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分析化学
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生物传感技术
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2026
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IF 3.8
Yin Yanjun,Shen Hailin,Wang Mengyao,Suo Zhiguang,Liu Yong,Wei Min
A self-calibrated ratiometric electrochemical aptasensor was developed for the detection of ochratoxin A. This sensor is based on DNA-mediated gold/prussian blue nanoflowers (Au/PB NFs), methylene blue/platinum/zinc-cobalt metal-organic framework (MB/Pt/ZnCo MOF), and an exonuclease III (Exo III)–driven bipedal DNA walker cyclic amplification strategy. The self-calibration mechanism of this sensor relies on the ratio between the response signal of MB/Pt/ZnCo MOF (I MB ) and the internal reference signal of Au/PB NFs (I PB ). This ratio can effectively resist external interference factors. DNA-mediated Au/PB NFs with a flower-like structure provide stable internal reference signals and promote electron transfer. MB/Pt/ZnCo MOF, leveraging ZnCo MOF with a porous structure and bimetallic synergistic effects, and Pt with electrocatalytic activity, serve as response signals. An Exo III–driven biped DNA walker was used to realize the cyclic amplification strategy. The sensor showed a wide linear range of 0.001~500 ng/mL, with a low limit of detection of 0.17 pg/mL. The detection capability of spiked corn flour, wine, and coffee powder samples was satisfactory, and the detection results for the quality control samples of coarse rice flour and wheat flour were not significantly different from those of high-performance liquid chromatography (HPLC), showing the potential for practical application.
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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）