FARADAY DISCUSSIONS
·
2024
·
IF 3.3
Wandong Zhao,Jin Lu
We describe a single-molecule electrochemical imaging strategy to study the electrocatalytic (EC') mechanism. Using the fluorescent molecule ATTO647N at extremely low concentrations as the substrate, we confirmed its catalytic reduction to a nonfluorescence form in the presence of the mediator phenazine methosulfate (PMS) by imaging and counting fluorescent molecules. Conventional electrochemical current in cyclic voltammetry would not have allowed us to infer the existence of an EC’ process or the PMS-mediated ATTO647N reduction. Additionally, we observed shifts in the catalytic reduction potential of ATTO647N at various mediator concentrations, which agree with the theoretical predictions by Savéant. Our work offers a new perspective on connecting single-molecule EC’ behaviors with the conventional ensemble EC’ mechanism, both practically and theoretically.
研究领域:
电化学
·
催化反应动力学
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产品关联
DOI
PubMed
高影响因子
IONICS
·
2025
·
IF 2.6
Cao Lin-An,Li Xiao-Qin,Li Yi-Qian,Huo Yun-Fei,Chen Lu
Paraquat (PQ) is a highly toxic herbicide but widely used in agricultural production. Highly sensitive detection of trace PQ is vital and challenging. Herein, two-dimensional electronically conductive metal–organic framework (2D EC-MOF) Ni 3 (HHTP) 2 (HHTP: 2,3,6,7,10,11-hexahydroxytriphenylene) is in situ constructed on the carbon paper and employed as an electrochemical sensor for PQ detection for the first time. The Ni 3 (HHTP) 2 electrochemical sensor exhibits a high detection sensitivity (175 μA·μM −1 ·cm −2 ), low detection limit (4.4 nM), good reproducibility, and strong anti-interference ability. In addition, the sensor shows reliable performance in the detection of PQ in real samples including apples, cucumbers, tomatoes, and pears (detection recovery is 95.4–104.4%). Furthermore, zeta potential test (a method which can obtain zeta potential value on the particle surface) and density functional theory (DFT) calculation confirm that the strong electrostatic interactions between active sites and PQ are conducive to the high-sensitivity detection of PQ. The accession of 2D EC-MOF to PQ electrochemical sensor provides new ideas for sensor design and broadens the scope of EC-MOF’s applications. Graphical abstract
研究领域:
分析化学
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材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2023
·
IF 13.1
Mingsheng Qin,Ziqi Zeng,Qiang Wu,Xiaowei Liu,Qijun Liu,Shijie Cheng,Jia Xie
Ethylene carbonate (EC) is susceptible to the aggressive chemistry of nickel-rich cathodes, making it undesirable for high-voltage lithium-ion batteries (LIBs). The arbitrary elimination of EC leads to better oxidative tolerance but always incurs interfacial degradation and electrolyte decomposition. Herein, an EC-free electrolyte is deliberately developed based on gradient solvation by pairing solvation-protection agent (1,3,5-trifluorobenzene, F 3 B) with propylene carbonate (PC)/methyl ethyl carbonate (EMC) formulation. F 3 B keeps out of inner coordination shell but decomposes preferentially to construct robust interphase, inhibiting solvent decomposition and electrode corrosion. Thereby, the optimized electrolyte (1.1 M) with wide liquid range (−70–77 °C) conveys decent interfacial compatibility and high-voltage stability (4.6 V for LiNi 0.6 Mn 0.2 Co 0.2 O 2 , NCM622), qualifying reliable operation of practical NCM/graphite pouch cell (81.1% capacity retention over 600 cycles at 0.5 C). The solvation preservation and interface protection from F 3 B blaze a new avenue for developing high-voltage electrolytes in next-generation LIBs.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Minghui Cao,Minqiang Wang,Le Li,Hengwei Qiu,Zhi Yang
To optimize the performance of silver nanowire (Ag NW) film heaters and explore the effect of graphene on a film, we introduced poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) and graphene modified with ethyl cellulose (graphene-EC) into the film. The high-quality and well-dispersed graphene-EC was synthesized from graphene obtained by electrochemical exfoliation as a precursor. The transparent film heaters were fabricated via spin-coating. With the assistance of graphene-EC, the stability of film heaters was greatly improved, and the conductivity was optimized by adjusting the Ag NW concentration. The film heaters exhibited a fast and accurate response to voltage, accompanied by excellent environmental endurance, and there was no significant performance degradation after being operated for a long period of time. These results indicate that graphene-EC plays a crucial role in optimizing film stability and heat dispersion in the film. The Ag NW/PEDOT:PSS-doped graphene-EC film heaters show a great potential in low-cost indium-tin-oxide-free flexible transparent electrodes, heating systems, and transparent film heaters.
研究领域:
材料科学
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xishun Peng,Yiheng Yuan,Anjiang Lu,Cunwei Wang,Caizhen Zu,Haili Zhang,Zhongchen Bai
Glyphosate (Gly) residues in agricultural products have a serious health risk, so it is urgent to seek a sensitive and convenient method for recognizing Gly residues in food. In this study, we proposed an electrochemical surface-enhanced Raman spectroscopy (EC-SERS) sensor of polyaniline/reduced graphene oxide/Ag/Cu (PANI/RGO/Ag/Cu) film to detect Gly residues. The EC-SERS sensor of PANI/RGO/Ag/Cu film had a large specific surface area, which could increase the binding sites of cu 2+ /Gly clathrates for boosting specifically its SERS signal. Moreover, Ag/Cu nanoparticles on the surface of film could effectively increase the differential pulse voltammetry signal and SERS signal of Gly molecules. The limit of detection of EC-SERS sensor to Gly could reach 1.9 nM. In addition, the EC-SERS sensor we prepared could also sensitively identify Gly residues on fresh fruit peels. The PANI/RGO/Ag/Cu film we proposed in this paper has great potential for selective and accuracy detecting Gly residues in agricultural products.
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biosensors-Basel
·
2022
·Vol. 12
·期 6
·367
·
IF 5.743
Rui-Hong Ye,Jin-Yang Chen,Di-Hui Huang,Yan-Jun Wang,Sheng Chen
The electronic conductive metal-organic frameworks (EC-MOFs) based on a single ligand are not suitable for the accurate detection of bisphenol A (BPA) due to the limitations of their electron-transfer-based sensing mechanism. To overcome this drawback, we developed EC-MOFs with novel dual-ligands, 2,3,6,7,10,11-hexahydroxy-sanya-phenyl (HHTP) and tetrahydroxy 1,4-quinone (THQ), and metal ions. A new class of 2D π-conjugation-based EC-MOFs (M-(HHTP)(THQ)) was synthesized by a self-assemble technique. Its best member (Cu-(HHTP)(THQ)) was selected and combined with reduced graphene (rGO) to form a Cu-(HHTP)(THQ)@rGO composite, which was thoroughly characterized by X-ray diffraction, field scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Cu-(HHTP)(THQ)@rGO was drop-cast onto a glassy carbon electrode (GCE) to obtain a sensor for BPA detection. Cyclic voltammetry and electrochemical impedance tests were used to evaluate the electrode performance. The oxidation current of BPA on the Cu-(HHTP)(THQ)@rGO/GCE was substantially higher than on unmodified GCE, which could be explained by a synergy between Cu-(HHTP)(THQ) (which provided sensing and adsorption) and rGO (which provided fast electron conductivity and high surface area). Cu-(HHTP)(THQ)@rGO/GCE exhibited a linear detection range for 0.05–100 μmol·L−1of BPA with 3.6 nmol·L−1(S/N = 3) detection limit. We believe that our novel electrode and BPA sensing method extends the application perspectives of EC-MOFs in the electrocatalysis and sensing fields.
研究领域:
材料科学
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分析化学
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环境科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Qingshan Dai,Jiarui Huang,Xia Qiu,Xiaohu Chen,Yongxin Li
The continuous spread and infection of the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) worldwide has brought a great impact on people’s lives and health and become a serious public health problem. In this contribution, a surface-enhanced Raman scattering/electrochemical (SERS/EC) dual-mode sensing system using single Au nanowires (Au NWs) as a platform is proposed for detecting the SARS-CoV-2 RNA with excellent sensitivity and selectivity. The Au NWs modified with bimetallic NPs can significantly increase the SERS/EC signals, and the presence of the SARS-CoV-2 RNA can produce significantly attenuated SERS/EC signals by shearing off the aptamer containing the signal molecules. In addition to its excellent specific recognition of the SARS-CoV-2 RNA and high sensitivity (detection limits of 1.02 pM by the SERS method and 0.21 pM by the EC method), this nanosensor has been successfully applied to samples with complex matrices and is expected to serve as a potential, sensitive, and reliable tool for virus screening and protein detection, especially for in vivo detection due to the small overall dimension of single Au NWs.
研究领域:
生物传感器
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病毒检测
·
纳米技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaocui Lai,Wenkai Cao,Ganggang Zhang,Edison Huixiang Ang,Liu Su,Cong Liu,Weihua He,Weihua Lai,Shengliang Deng
The presence of multiple pesticide residues in fruits and vegetables poses a serious threat to human health. Conventional gold nanoparticles (AuNPs) used in multiplex lateral flow immunoassays (M−LFIA) often exhibit poor sensitivity and potential for misidentification. This study introduces a traffic signal-inspired fluorescent LFIA (T-FLFIA) designed for the simultaneous quantitative detection of chlorothalonil (CTN), paclobutrazol (PBZ), and fipronil (FIP) in cowpea and apple samples. Utilizing the hydrophobic interactions of aggregation-induced emission luminogens (AIEgens) and the coordination of epicatechin (EC) with Ni 2+ , we developed a novel nanostructure-aggregation-induced emission nanoparticle (AIENP) coated with a metal-polyphenol network of Ni/EC (AIENP@Ni/EC) via a self-assembly method and employed it as fluorescence probe in T-FLFIA. Three distinct colors of AIENP@Ni/EC featuring green, yellow, and red fluorescence were successfully synthesized by coating various AIEgens. This multicolor fluorescence capability facilitates more precise and expedited discrimination among multiple detection targets. High-performance AIE fluorescence probes were fabricated by directly coupling AIENP@Ni/EC with different antibodies through electrostatic interactions, leveraging the exceptional biocompatibility of Ni/EC. The T-FLFIA exhibited sensitive detection of CTN, PBZ, and FIP at concentrations as low as 0.038 ng/mL, 0.025 ng/mL, and 0.046 ng/mL, respectively, with high qualitative accuracy (92.5 %) within a rapid timeframe (5 s). This exceptional performance can be attributed to its outstanding optical properties and distinguishable colors. This approach demonstrated enhanced sensitivity and accuracy, reduced consumption of antibodies and immunoprobes, and a broader detection range compared to single-color AuNPs-M−LFIA. This study introduces a novel, practical, and cost-effective tool for rapid screening of diverse pesticide residues in field settings.
研究领域:
分析化学
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食品安全
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Menglu Wu,Zi-An Deng,Chaoyi Shen,Zhichao Yang,Zihan Cai,Di Wu,Kunsong Chen
Fruit is susceptible to various postharvest pathogens; thus, the development of multifunctional preservation materials that can achieve the broad-spectrum inhibition of different pathogens is a current research hotspot. Here, microfluidic blow spinning was used to create a biodegradable polycaprolactone/ethyl cellulose (PCL/EC) nanofibrous film that incorporated two naturally-sourced compounds, natamycin and trans -cinnamic acid, resulting in multi-microbial inhibition. The PCL/EC-based film had a smooth and even morphology, indicating the favorable integration of PCL and EC. After the incorporation of ingredients, the film exhibited good inhibitory activity against Escherichia coli , Staphylococcus aureus , and Botrytis cinerea , and it had finer fiber diameters, higher permeability, and antioxidant properties. We further demonstrated that strawberries that were padded with the film had good resistance to Botrytis cinerea . Also, the film did not interference with the qualities of the strawberries during storage. The study demonstrates a promising application for multi-antimicrobial and bio-friendly packaging materials in postharvest fruit preservation.
研究领域:
材料科学
·
食品科学
·
生物技术
·
微生物学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Qiang Chu,Ruoyi Jia,Wen Chen,Yangyang Liu,Yonglu Li,Xiang Ye,Yong Jiang,Xiaodong Zheng
Ethyl Carbamate (EC), as a carcinogen widely found in fermented foods, was verified that its cytotoxicity was associated with oxidative stress. Polysaccharides from natural sources due to their antioxidative capacity have attracted great attention in the past time. In this study, purified polysaccharide from Tetrastigma hemsleyanum vines (TVP) with 64.89 kDA was extracted and conducted multiple analysis to identify its structural information. It could be discovered that TVP was composed of mannose, rhamnose, glucuronic acid, glucose, galactose, and arabinose. In vitro , TVP could inhibit cytotoxicity and genotoxicity, attenuate oxidative damage and mitochondrial dysfunction induced by EC in Caco-2 cells. Meanwhile, TVP could suppress apoptosis by mTOR and Bcl-2 signaling pathways, ameliorate oxidative via Sirt1-FoxO1 and Nrf2-Keap1 signaling pathways. In vivo , EC as well triggered the decline of survival and athletic ability in Caenorhabditis elegans ( C. elegans ) and TVP could reverse the decline. In the meantime, TVP could ameliorate oxidative damage in N2 and daf-2 (-) mutant but fail in daf-16 (-) mutant, which suggested that DAF-16 (FOXO) might affect the antioxidative protection of TVP in C. elegans . In brief, our results manifested that TVP could attenuate EC-induced cytotoxicity both in vitro and in vivo .
研究领域:
药理学
·
毒理学
·
分子生物学
·
细胞生物学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2021
·Vol. 29
·期 2
·1824-1835
·
IF 4.223
Chen Yuan,Chen Yuancai
At present, there are many studies on microbial reduction of Pd (II), although few of these studies assess the bacterial toxicity of Pd (II) before and after reduction by microorganisms. In this study, the toxicity of Pd (II) to Bacillus wiedmannii MSM ( B. wiedmannii MSM) was assessed before and after reduction by live B. wiedmannii MSM cells (referred to as “Pd (0)-loaded cells”) and after biosorption by dead B. wiedmannii MSM cells (referred to as “Pd (II)-loaded cells”). B. wiedmannii MSM is a widely occurring, nonpathogenic aerobic bacterium. Compared with Pd (II), the EC 20 , EC 50 , and EC 80 of Pd (0)-loaded cells increased by 77.73-, 112.75-, and 163.91-fold, respectively, while the EC 20 , EC 50 , and EC 80 of Pd (II)-loaded cells increased by only 11.55-, 9.77-, and 8.29-fold, respectively. The sterilization contribution rates of the mechanisms of action of Pd (0)-loaded cells were ranked in the order of: remaining Pd (II) > oxidative stress > physical puncture. Pd (II) was found to increase cell membrane permeability, glutathione S-transferase (GST) enzyme activity, and reactive oxygen species levels in cells and decrease the cell membrane potential. XPS results indicated that Pd (II) increased the content of polysaccharides and peptides and decreased the content of hydrocarbons in cells. These findings reveal the bactericidal mechanism of toxicity of Pd (II) and Pd (0)-loaded cells on Bacillus wiedmannii MSM and provide an environmentally friendly and inexpensive method for Pd (II) detoxification.
研究领域:
环境科学
·
微生物学
·
毒理学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2013
·
IF 3.334
Guobin Xia,Shan Hong,Songbai Liu
Simultaneous preparation of naturally rare catechins , EGC and EC , has been realized by tannase-mediated biotransformation combining high speed counter current chromatography. In addition, simultaneous preparation of the four catechins, EGCG, ECG, EGC, and EC in green tea extract has also been achieved by HSCCC under the normal phase and the reversed phase modes. The identity of the catechins was determined by HPLC-DAD-ESI-MS and quantification of the catechins was performed by HPLC-DAD. In a typical HSCCC separation, 27.2 mg 98.8% EGCG, 14.1 mg 94.7% EGC, and 9.3 mg 97.5% EC were obtained. This new method is efficient, time-saving and valuable for biological studies.
研究领域:
植物化学
·
生物技术
·
分析化学
✓ 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）