ANALYTICAL CHEMISTRY
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2020
·
IF 6.785
Pei-Hua Li,Meng Yang,Yi-Xiang Li,Zong-Yin Song,Jin-Huai Liu,Chu-Hong Lin,Jie Zeng,Xing-Jiu Huang
Achieving highly sensitive and selective detection of trace-level As(III) and clarifying the underlying mechanism is still a intractable problem. The electroanalysis of As(III) relies on the electrocatalytic ability of the sensing interface. Herein, we first adopt single-atom catalysts as the electrocatalyst in As(III) detection. Cobalt single-atoms anchored on nitrogen-doped carbon material (Co SAC) were found to have an extraordinary sensitivity of 11.44 μA ppb–1 with excellent stability and repeatability, which so far is the highest among non-noble metal nanomaterials. Co SAC also exhibited a superior selectivity toward As(III) compared with some bivalent heavy metal ions (HMIs). Combining X-ray absorption spectroscopy (XAFS), density functional theory (DFT) calculation, and reaction kinetics simulation, we demonstrated that Co single atoms stabilized in N2C2 support serve as active sites to catalyze H3AsO3 reduction via the formation of Co–O hybridization bond, leading to a lower energy barrier, promoting the breakage of As–O bonds. Importantly, the first electron transfer is the rate-limiting step of arsenic reduction and is found to be more favorable on Co-SAC both thermodynamically and kinetically. This work not only expands the potential applicaiton of single-atom catalysts in the detection and treatment of As(III), but also provides atomic-level catalytic insights into HMIs sensing interfaces.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2016
·
IF 2.822
Yinfeng Li,Lu Wang,Haipeng Zhao,Lingzhi Du,Baoxian Ye
A voltammetric sensor for polydatin sensing was simply fabricated by in-situ electrochemically reducing graphene oxide at a glassy carbon electrode. The redox behavior of polydatin was investigated systematically. For the first time, the kinetics parameters of electrode reaction of polydatin were calculated using various electrochemical techniques. Significant electrochemical signal increases were achieved by the excellent conductivity and large surface area of reduced graphene oxide. Thereafter, a highly-sensitive electroanalytical method for polydatin was established with a good linear relationship from 4.0 × 10 − 8 mol L − 1 to 3.5 × 10 − 6 mol L − 1 and a detection limit of 4.0 × 10 − 8 mol L − 1 . In addition, the practical application of present method was demonstrated by determining the concentration of polydatin in real sample with satisfactory result.
研究领域:
分析化学
·
电化学
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Yue Hua,Min Liu,Shuai Li,Fengjuan Liu,Yuanyuan Cai,Huan Liu,Yuqi Wan,Xiaoxia Lv,Hua Wang
An electroanalysis strategy has been developed for probing glutathione (GSH) separately in hela and yeast cells based on the displacement reaction route using melamine-copper (MA-Cu) nanocomposites . Herein, MA-Cu nanocomposites were initially synthesized by the controlled supermolecular self-assembly process showing various morphological structures depending on the MA-to-Cu ratios used. It was discovered that the electrodes modified with rod-like MA-Cu nanocomposites could achieve the stable electrochemical output of solid-state CuCl at a low potential, which might circumvent the possible interference from co-existing electroactive substances in complicated backgrounds like cells. More importantly, the yielded CuCl signals would decrease selectively induced by GSH through the specific Cu-GSH interaction that would trigger the displacement of CuCl into non-electroactive complex. The MA-Cu nanorods-modified electrodes can allow for the detection of GSH with the concentrations linearly ranging from 0.010 to 300.0 μM. Subsequently, the feasibility of the developed electroanalysis strategy was demonstrated for the evaluation of GSH separately in the extractions of hela and yeast cells, promising the wide applications in the clinical and food analysis fields.
研究领域:
分析化学
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生物医学工程
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Yong-Xiang Wu,Xun Zhou,Benwang Zhou,Chao Li,Peng Cui,Manhuan Cheng,Yang Wang,Xinsong She
Presently, Cu(OH) 2 nanowire arrays@Cu Foam (Cu(OH) 2 –NWA@Cu Foam) nanostructure has been confirmed to possess an excellent capacity of nonenzymatical electroanalysis of histamine (His). Based on Cu(OH) 2 –NWA@Cu Foam electrode, electrochemical investigations elucidated electron transfer kinetics principles of electrooxidation of His. Substantially, it was realized that a four–electron–transferring dehydrogenation was involved in diffusion–controlled electrooxidation of His, contributing tremendously to establishing as–proposed mechanization of His electrooxidation. At optimal conditions, Cu(OH) 2 –NWA@Cu Foam electrode reflected excellent electrochemical performance such as sensitivity of 3.089 mA mM –1 cm –2 , limit of determination of 94 nM, respond time of 1.6 s and linear respond rang of 0.5–1250 μM. The outperformed electroanalytical performance can be physically explicated by the dedications from larger exposed surface area, bigger interface–hydrophilicity–deduced His diffusion coefficient and less charge transfer resistance. Moreover, the outstanding selectivity, stability and reproducibility of Cu(OH) 2 –NWA@Cu Foam electrode ensured its practical effectiveness in regulating real His levels in fermented mandarin fish. Compared with control group, the mandarin fish by inoculating Lactobacillus sakei subsp . sakei delivered less His contents, deducing that inoculation of Lactobacillus sakei subsp . sakei can effectively depress His generation during fermentation process. Eventually, the one–step as–established Cu(OH) 2 –NWA@Cu Foam nanostructure positioned itself as an upcoming possibility to pursue commercialized utilization.
研究领域:
食品科学
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电化学
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2022
·
IF 6.911
Datong Wu,Cong Ma,Ting Wan,Pengfen Zhu,Yong Kong
In most cases, the recognition efficiency of chiral electroanalysis relies on the chiral carbon center, whereas its medium is just used to transfer the electron. Differently, in this study, an ionic helical polymer with right- or left-handed configuration was prepared via an acid-base interaction between the ionic polymer and enantiopure 1,2-diphenylethane-1,2-diamine. The structure and absolute handedness of the helical polymers were well characterized by the circular dichroism spectrum, gel permeation chromatography , and Fourier transform infrared spectroscopy . The pyridinium moiety of the helical polymer contributes to the electron transfer when it was directly modified on the surface of the glassy carbon electrode as an electrochemical enantioselector for chiral electroanalysis. Results indicated that different configurations of amino acids can be recognized in the responses of different electric signals, namely peak current or peak potential. The peak current ratio between L- and d -isomer can be up to 7.5 and 23.2 for tryptophan and tyrosine , respectively. Most importantly, the reversal of the electric signal can be observed toward L- and d -isomer under the different testing conditions such as pH and metal ion content, because of two stereogenic centers (the chiral inducer and the stereogenic axis) in the helical polymer. Overall, we believe that the present study offers a great promise for the synthesis and application of the ionic helical polymers accompanying with multiple stereogenic centers.
研究领域:
化学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2024
·Vol. 24
·期 14
·22227-22235
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IF 4.3
Shengyao Shi,Song Xiao,Haocheng Deng,Xiangyu Tan,Shuangshuang Tian,Ju Tang,Xiaoxing Zhang,Yi Li
Harvesting energy from natural water via an evaporation-driven hydrovoltaic device (EHD) has attracted tremendous interest, and it also offers exceptional potential for application in self-powered sensing owing to its independent operation and stability. Here, we fabricated an analytical strip by vacuum filtering single-walled carbon nanotubes (SWCNTs) into cellulose paper for highly sensitive salinity detection in water solution. The role of electrode structure, water solution ions, and temperature on the EHD response was systematically investigated. Specifically, this type of analytical strip has a specific continuous load capacity and produces a consistent voltage output of ~0.55 V. Furthermore, a self-powered equivalent salt deposit density (ESDD) sensor based on EHD was adopted for insulator contamination detection in electrical equipment, demonstrating superior sensitivity, stability, and anti-interference ability. This work broadens the EHD-based self-powered sensor and provides a quick monitoring strategy for the operational state of insulators in the electrical equipment.
研究领域:
材料科学
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能源技术
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2024
·Vol. 48
·期 20
·9358-9365
·
IF 2.7
Junfeng Wang,Shuyue Tian,Sihua Pan,Yujuan Zhang,Wang Sun,Yang Wang
The effective assembly of hollow nanomaterials is of great importance for the rapid advancement of electroanalytical platforms. Herein, the hollow tubular zeolite imidazolium framework-8 (HTZIF-8) was carefully constructed via the precursor conversion pathway. Subsequently, the predictable assembly of HTZIF-8 with carbon nanotubes (CNTs) occurred to form a unique hollow dual-tube MOF hybrid material (HTZIF-8@CNTs). Meanwhile, the HTZIF-8@CNTs electroanalytical platform was established with dopamine (DA) as the objective biomolecule. In the electrochemical evaluation, the linear intervals of 0.06–600 μmol L−1 and detection limit of 0.02 μmol L−1 (S/N = 3) were determined, which were mainly ascribed to nano-synergistic engineering of HTZIF-8 and CNTs. The HTZIF-8@CNTs hybrid material exhibited superior electrocatalytic performance for DA compared to the solid rod-like MOF composite (SRZIF-8@CNTs), which was majorly based on the faster mass transfer characteristics of hollow MOFs. Additionally, the HTZIF-8@CNTs electrochemical sensor presented outstanding anti-interference capabilities as well as stability and could be utilized for the detection of DA in real samples. The employment of F and t statistics were employed to ensure the reliability of the results. This study will offer novel thoughts toward the application of hollow MOF composites in the area of electroanalytical platforms.
研究领域:
材料科学
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电化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2014
·
IF 3.511
Zhuo Ye,Yinfeng Li,Jianguo Wen,Kunjing Li,Baoxian Ye
A simple, inexpensive and highly sensitive electrochemical method for the determination of jatrorrhizine was developed using an electrochemically pretreated glassy carbon electrode (EPGCE). The electrochemical behavior of jatrorrhizine was systematically investigated in detail and some kinetic parameters were calculated for the first time. A reasonable reaction mechanism of jatrorrhizine on the EPGCE was also discussed and proposed, which could be a reference for the pharmacological action of jatrorrhizine in clinical study. And the first electroanalytical method of jatrorrhizine was established with a wide linear range from 7.0×10 −8 to 2.0×10 −5 mol L −1 and a low detection limit of 5.0×10 −8 mol L −1 . The proposed method was successfully applied in determination of jatrorrhizine in pharmaceutical sample, Tinospora capillipes Gagnep (a traditional Chinese medicine), with satisfactory results.
研究领域:
药物分析
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Datong Wu,Cong Ma,Fei Pan,Yongxin Tao,Yong Kong
In the past, various chiral isomers accompanied by electroactive units have been distinguished using electrochemical techniques, which can produce electrochemical signals by themselves. However, it is still difficult to use an electrochemical technique to detect nonelectroactive samples. To address this bottleneck, an electroactive chiral polymer (S,S)-p-CVB-Fc that contains one redox-active ferrocene unit was designed and synthesized in this study. The electroactive polymer can give electrochemical signals as an alternative to the tested chiral samples, regardless of whether the isomers have electroactive units. Then, it was fixed on the surface of a glassy carbon electrode as an electrochemical chiral sensor. When nonelectroactive amino acids including proline, threonine, and alanine were examined by the sensor, clear discrimination in the response of peak current could be observed toward l- and d-isomers at pH 6.5. The peak current ratios (IL/ID) for proline and alanine were 1.47 and 1.48, respectively. In contrast, for threonine, the d-isomer exhibited a higher peak current than the l -isomer with a ratio of 2.59. In summary, the results ensure that the current work can enlarge the testing scope of chiral samples in the field of chiral electroanalysis using an electroactive sensor.
研究领域:
分析化学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
·
2022
·Vol. 22
·期 12
·4476
·
IF 3.847
Yiwen Kuang,Mengxue Li,Shiyu Hu,Lu Yang,Zhanning Liang,Jiaqi Wang,Hongmei Jiang,Xiaoyun Zhou,Zhaohong Su
A sensitive simultaneous electroanalysis of phytohormones indole-3-acetic acid (IAA) and salicylic acid (SA) based on a novel copper nanoparticles-chitosan film-carbon nanoparticles-multiwalled carbon nanotubes (CuNPs-CSF-CNPs-MWCNTs) composite was reported. CNPs were prepared by hydrothermal reaction of chitosan. Then the CuNPs-CSF-CNPs-MWCNTs composite was facilely prepared by one-step co-electrodeposition of CuNPs and CNPs fixed chitosan residues on modified electrode. Scanning electron microscope (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and linear sweep voltammetry (LSV) were used to characterize the properties of the composite. Under optimal conditions, the composite modified electrode had a good linear relationship with IAA in the range of 0.01–50 μM, and a good linear relationship with SA in the range of 4–30 μM. The detection limits were 0.0086 μM and 0.7 μM (S/N= 3), respectively. In addition, the sensor could also be used for the simultaneous detection of IAA and SA in real leaf samples with satisfactory recovery.
研究领域:
植物学
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材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Fangqin Wang,Wenrong Cai,Lilan Tan,Junyao Li,Datong Wu,Yong Kong
Although electroactive chiral covalent–organic frameworks (CCOFs) are considered an ideal platform for chiral electroanalysis, they are rarely reported due to the difficult selection of suitable precursors. Here, a facile strategy of liquid–liquid interfacial polymerization was carried out to synthesize the target electroactive CCOFs Ph-Py+-(S,S)-DPEA·PF6– and Ph-Py+-(R,R)-DPEA·PF6–. That is, a trivalent Zincke salt (4,4′,4″-(benzene-1,3,5-triyl)tris(1-(2,4-dinitrophenyl)pyridin-1-ium)) trichloride (Ph-Py+-NO2) and enantiopure 1,2-diphenylethylenediamine (DPEA) were dissolved in water and chloroform, respectively. The Zincke reaction occurs at the interface, resulting in uniform porosity. As expected, the cyclic voltammetry and differential pulse voltammetry measurements showed that the tripyridinium units of the CCOFs afforded obvious electrochemical responses. When Ph-Py+-(S,S)-DPEA·PF6– was modified onto the surface of a glassy carbon electrode as a chiral sensor, the molecules, which included tryptophan, aspartic acid, serine, tyrosine, glutamic acid, mandelic acid, and malic acid, were enantioselectively recognized in the response of the peak current. Very importantly, the discriminative electrochemical signals were derived from Ph-Py+-(S,S)-DPEA·PF6–. The best peak current ratios between l- and d-enantiomers were in the range of 1.31–2.68. Besides, a good linear relationship between peak currents and enantiomeric excess (ee) values was established, which was successfully harnessed to determine the ee values for unknown samples. In a word, the current work provides new insight and potential of electroactive CCOFs for enantioselective sensing in a broad range.
研究领域:
材料科学
·
分析化学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Yinghao Duan,Shuo Li,Sheng Lei,Jiantong Qiao,Lina Zou,Baoxian Ye
A new nanocomposite , molybdenum copper selenide (MoCuSe) nanoparticles decorated with reduced graphene oxide (rGO), was successfully prepared by a facile hydrothermal method . The MoCuSe-rGO modified glassy carbon electrode (MoCuSe-rGO/GCE) was fabricated for the first time, which provided a large surface area and exhibited a rapid electron transport rate for the bisphenol A (BPA). The electrochemical behavior of BPA was investigated with various techniques and a new electroanalytical method was established with differential pulse voltammetry . Under optimum conditions, the proposed sensor showed an excellent electrochemical response to BPA with detection limit of 9.0 × 10 −10 mol L −1 and wider linear range of 3.0 × 10 −9 mol L −1 –1.0 × 10 −4 mol L −1 . Finally, the proposed method was applied to determine BPA in real samples with satisfactory results. This work might provide a new thought for the development of electrochemical sensors with hybrid materials.
研究领域:
分析化学
·
纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）