International Journal of Electrochemical Science
·
2023
·
IF 1.5
Mengting Zhu,Ruli Xu,Xueyang Wang,Jie Liu Qianli Zhang,Jie Wei
Four Fe-based metal-organic frameworks (MIL-101(Fe), MIL-53(Fe), MIL-88(Fe), and MIL-100(Fe)) were synthesized using a solvothermal method, and further characterized by X-ray diffraction, Fourier transforms infrared spectroscopy, Scanning electron microscopy, and X-ray photoelectron spectroscopy. The synthesized Fe-MOFs were used to fabricate the modified carbon paste electrodes (CPE) for simultaneous detection of hydroquinone and catechol. Among the MILs (Fe) modified CPEs, MIL-101(Fe)/CPE exhibited extraordinary electrochemical sensitivity because of MIL-101 (Fe)’s excellent conductivity. The oxidation potential separation of hydroquinone and catechol achieved 190 mV. Compared with CPE, the oxidation currents of hydroquinone and catechol at MIL-101/CPE were 10-fold higher and the reduction currents were 5-fold higher. The linear range was 2 - 90 μM for hydroquinone and 2 - 100 μM for catechol, and the detection limit was 0.58 μM and 0.62 (S/N = 3) μM for hydroquinone and catechol. Furthermore, the application of MIL-101 (Fe)/CPE has been validated in an actual river water sample with the satisfied recoveries of 90.21 - 102.36% and 91.11 - 102.19% for hydroquinone and catechol, respectively.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Linzi Huang,Chenxi Wang,Yaqi Yang,Yilin Wang,Chunyan Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
The ecological environment and public safety are seriously threatened by the typical phenolic contaminant hydroquinone (HQ). Here, using a straightforward physical mixing technique, we created an n - n heterojunction by uniformly immobilizing cadmium sulfide (CdS) nanoparticles on the surface of a three-dimensionally layered, flower-like structure made of tin sulfide (SnS 2 ). Then, as photosensitizers , carbon nanotubes (CNTs) were added to the CdS/SnS 2 complex to create a type-II heterostructure of CdS/SnS 2 /CNTs with synergistic effects. Subsequently, the detector HQ was bound to the modified photoelectrodes , which was accompanied by the hole oxidation of the bound HQ, leading to a significant increase in the photocurrent signal, thus allowing specific and sensitive detection of HQ. Under optimized detection conditions, the proposed photoelectrochemical sensor shows a wide detection range of 0.2 to 100 μM for HQ with a detection limit as low as 0.1 μM. The high accuracy of the sensor was demonstrated by comparison with the detection results of UV–vis spectrophotometry . In addition, the photoelectrochemical sensor exhibits good reproducibility, stability, selectivity , and specificity, providing a light-driven method to detect HQ.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2019
·Vol. 32
·期 1
·142-148
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IF 2.691
Yue Zhang,Ziyao Lv,Jie Zhou,Yan Fang,Hao Wu,Fengxue Xin,Wenming Zhang,Jiangfeng Ma,Ning Xu,Aiyong He,Weiliang Dong,Min Jiang
In this study, stable CotA laccase from Bacillus subtilis 168 was adsorbed on electrode modified with a thiol graphene-gold nanoparticle (thGP-AuNPs) nanocomposite film. The novel bacterial laccase biosensor was employed for quantitative detection of hydroquinone (HQ) and the electrochemical properties of this laccase biosensor were investigated. The results indicate that the immobilized CotA shows great oxidation activity towards HQ in the presence of oxygen and the biosensor shows linear electrocatalytic activity in the concentration range from 1.6 to 409.6 μM, with a detection limit of 0.3 μM. Further, the CotA modified electrode, when compared to fungal laccase-modified biosensors, shows better alkaline stability (retaining approximately 80 % and 70 % of response current at pH 8 and 9, respectively) and reusability (retaining ∼87 % of response current after 100 days). The development of this new kind of laccase on a biosensor will offer a novel tool for substance detection applications in hostile environments, especially for industrial pollutants.
研究领域:
生物技术
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环境科学
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分析化学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2021
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IF 6.558
Meiyan Zhu,Xiaotong Dong,Ming Li,Liangbin Jia,Ye Ma,Minggang Zhao,Hongzhi Cui
Detection of pollutants in seawater faces a great challenge of strong interference, and the facile detection method is lacked. The CoMn 2 O 4 /β-MnO 2 p-n junction oxidase mimetics were successfully prepared for colorimetric detection of hydroquinone in seawater. The catalysis ability was enhanced significantly by the photo-induced p-n junction interface effect. It not only promoted the formation of H 2 O 2 by suppressing the recombination of photon-generated carriers, but also provided the driving force for electron transport . The colorimetric detection of hydroquinone was achieved by fading and exhibited good adaptability in seawater. The obtained good recovery rate (97.23%–101.37%) in seawater makes it an inspiring method for practical application. The photo-induced p-n junction interface effect provides an opportunity for developing the application of colorimetric sensing in seawater detection.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ANALYST
·
2015
·Vol. 140
·期 23
·7939-7947
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IF 4.107
Yi Hong Huang,Jian Hua Chen,Li Jing Ling,Zhen Bo Su,Xue Sun,Shi Rong Hu,Wen Weng,Yang Huang,Wen Bing Wu,Ya San He
In the present study, carbon nanocages (CNCs) decorated with gold nanoparticles (AuNPs) with diameters of 2–5 nm were synthesized by simply mixing their solutions. The sizes of the AuNPs are small enough to diffuse into the inside of the CNCs by electrostatic incorporation and their morphologies were characterized by transmission electron microscopy, X-ray diffraction, energy dispersive spectrometry, Raman spectrometry and ultraviolet visible absorption spectra. The AuNPs@CNCs modified electrode was prepared for simultaneous highly sensitive determination of catechol (CC) and hydroquinone (HQ). This modified electrode demonstrated fantastic eletrochemical catalytic activities towards CC and HQ by cyclic voltammetry and differential pulse voltammetry. The calibration curves showed a linear response between the peak currents and the concentrations of CC and HQ. A wide dynamic detection range of 1.0–250.0 μM and 0.1–200.0 μM with a low detection limits (S/N = 3) of 0.0986 μM and 0.0254 μM can be obtained for CC and HQ respectively. The present method was successfully employed for determination of CC and HQ in a practical sample.
研究领域:
材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 12
·期 1
·65
·
IF 5.076
Huaxu Zhou,Guotao Dong,Ajabkhan Sailjoi,Jiyang Liu
Three-dimensional graphene (3DG) with macroporous structure has great potential in the field of electroanalysis owing to a large active area, excellent electron mobility and good mass transfer. However, simple and low-cost preparation of 3DG electrodes with high electrocatalytic ability is still a challenge. Here, a fast and convenient electrochemical polarization method is established to pretreat free-standing 3DG (p-3DG) to offer high electrocatalytic ability. 3DG with monolithic and macroporous structure prepared by chemical vapor deposition (CVD) is applied as the starting electrode. Electrochemical polarization is performed using electrochemical oxidation (anodization) at high potential (+6 V) followed with electrochemical reduction (cathodization) at low potential (−1 V), leading to exposure of edge of graphene and introduction of oxygen-containing groups. The as-prepared p-3DG displays increased hydrophilicity and improved electrocatalytic ability. As a proof of concept, p-3DG was used to selective electrochemical detection of two isomers of benzenediol, hydroquinone (p-BD) and catechol (o-BD). In comparison with initial 3DG, p-3DG exhibits increased reversibility of redox reaction, improved peak current and good potential resolution with high potential separation between p-BD and o-BD. Individual or selective determination of p-BD or o-BD in single substance solution or binary mixed solution is realized. Real analysis of pond water is also achieved.
研究领域:
材料科学
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分析化学
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DOI
高影响因子
RSC Advances
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2022
·Vol. 12
·期 37
·23762-23768
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IF 4.036
Guofang Wang,Siyi Zhang,Qinyu Wu,Jingzhi Zhu,Suhua Chen,Yuanyuan Lei,Yanmei Li,Haomin Yi,Liyin Chen,Zi-Qi Shi,Yi Xiao
Simple, rapid and sensitive analysis of drug-derived pollutants is critically valuable for environmental monitoring. Here, taking acetaminophen, hydroquinone and catechol as a study example, a sensor based on an ITO/APTES/r-GO@Au electrode was developed for separate and simultaneous determination of phenolic pollutants. ITO electrodes that are modified with 3-aminopropyltriethoxysilane (APTES), graphene (GO) and Au nanoparticles (Au NPs) can significantly enhance the electronic transport of phenolic pollutants at the electrode surface. The redox mechanisms of phenolic pollutants include the electron transfer with the enhancement of r-GO@Au. The modified ITO electrode exhibits excellent electrical properties to phenolic pollutants and a good linear relationship between ECL intensity and the concentration of phenolic pollutants, with a limit of detection of 0.82, 1.41 and 1.95 μM, respectively. The separate and simultaneous determination of AP, CC and HQ is feasible with the ITO/APTES/r-GO@Au electrode. The sensor shows great promise as a low-lost, sensitive, and rapid method for simultaneous determination of drug-derived pollutants.
研究领域:
环境科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Zan Lu,Dongning Li,Qianli Zhang,Jie Wei
Nitrogen doped reduced graphene oxide (N-RGO) was prepared by a facile one-step procedure with ammonium hydroxide as the doping regent and hydrazine hydrate as the reducing regent. The obtained N-RGO was characterized by transmission electron microscope (TEM), Fourier transform infrared spectra (FTIR) and X-ray photoelectron spectroscopy(XPS). The characterized results validated the successful nitrogen doping of 1.8 at% and the reducing of graphene oxide to RGO. N-RGO modified glassy carbon electrode (N-RGO/GC) was explored for the simultaneous determination of hydroquinone (HQ) and catechol (CC) using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The potential separation of the oxidation peaks between HQ and CC were up to 110 mV, which is enough to electrochemical distinguish the dihycroxybenzene isomers. Under the optimal conditions, the oxidation peak currents of HQ and CC linearly increased with the concentrations in the ranges from 5 to 693 and 5 to 492 μmol/L, respectively. The detection limits are 0.1 μmol/L for HQ and 0.5 μmol/L for CC. When simultaneously changing the concentration of the two isomers, the linear range was from 15 to 330 μmol/L for both HQ and CC. The relative standard deviations (n=20) are 3.45% for HQ and 3.82 % for CC.
研究领域:
分析化学
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材料科学
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DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2020
·Vol. 31
·期 1
·25-32
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IF 1.399
Meiqin,Zhu Jingjing,Fan Rongrong,Wang Yujie,Lv Zhaojun,Han Yongming,Peng Jun,Zheng Xinyu,Lin Ruiyu
High specific surface area activated carbon prepared by Perilla frutescens (PFHSAAC) was modified on the surface of the glassy carbon electrode (GCE) by drop-coating method to construct a PFHSAAC/GCE. The electrochemical properties of the modified electrode were investigated in detail by some electrochemical methods such as cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). Experiment results show that the modified electrode has excellent redox activity and distinction capability toward the two isomers of catechol (CC) and hydroquinone (HQ). The separation of oxidation peak potential for HQ and CC of DPV is 112.8 mV. Under the optimal conditions, the oxidation peak currents of HQ and CC show good linear relationships with their concentrations in the ranges of 1.0 × 10-6-2.0 × 10-4 and 1.0 × 10-6-1.5 × 10-4 mol L-1, respectively. The limits of detection for HQ and CC are 3.57 × 10-7 and 4.23 × 10-7 mol L-1, respectively. The PFHSAAC/GCE exhibits good stability, repeatability and sensitivity. The developed method was used to determine HQ and CC in water samples with best results.
研究领域:
分析化学
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环境科学
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产品关联
DOI
高影响因子
ANALYST
·
2016
·Vol. 141
·期 15
·4772-4781
·
IF 4.033
Hong Xie,Kaiyue Duan,Muyin Xue,Yongling Du,Chunming Wang
Reduced graphene oxide (rGO)-based Cu2O nanocomposites were prepared by a facile one-pot reaction process. The surface morphology, structure and chemical composition of Cu2O–rGO nanocomposites were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. The Cu2O–rGO modified Pt rotating ring-disk electrode (RRDE) was successfully fabricated for the photoelectrocatalytic analysis of hydroquinone (HQ). The photoelectrochemical behaviors of HQ were investigated by the hydrodynamic differential pulse voltammetry technique, using the Cu2O–rGO modified Pt RRDE as the working electrode. The effects of pH values, rotation rates, illumination time and applied bias potential have been discussed. The possible electroactive intermediate product, namely hydroxyhydroquinone, was obtained through the photoelectrocatalytic degradation of HQ on the Cu2O–rGO modified Pt disk electrode, which was compulsively transported and could only be detected at the bare Pt ring electrode at around +0.02 V with an oxidation signal. We found that the peak current at +0.02 V had a good linear relationship with the HQ concentration in the range from 5.0 × 10−6 to 1.0 × 10−3 M, with a low limit of detection and excellent reproducibility. The present work has demonstrated that Cu2O–rGO nanocomposites have enhanced photoelectrocatalytic ability for the degradation of organic pollutants and this modified RRDE technique can be potentially applied for the in situ determination of organic pollutants.
研究领域:
环境科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2015
·Vol. 27
·期 9
·2221-2229
·
IF 2.138
Yancai Li,Shuqing Feng,Yanmei Zhong,Yuhui Li,Shunxing Li
Carboxyl functionalized graphene (CFG) self-assembled monolayers (SAMs) were constructed on the carboxylated glassy carbon electrode based on covalent interaction for simultaneous determination of hydroquinone (HQ) and catechol (CC). Scanning electron microscopy and electrochemical impedance spectroscopy results proved that the CFG SAMs was successfully formed with enhanced conductivity. According to electrochemical voltammetry experiments, the modified electrode showed excellent sensitivity and selectivity for HQ and CC. Under optimal conditions, the sensing platform showed wide linear response for HQ and CC with detection limit of 0.2 µM ( S/N =3) and 0.6 µM ( S/N =3), respectively. Moreover, the sensor also displays good reproducibility and stability.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2017
·
IF 3.012
Qi Chen,Xi Li,Xinmin Min,Dan Cheng,Jian Zhou,Yugang Li,Zhizhong Xie,Peng Liu,Weiquan Cai,Chaocan Zhang
A composite (MOF-GO) of Cu-based MOF-199 (MOF) and graphene oxide (GO) was prepared by the solvothermal method and used as the modified material to fabricate an electrochemical sensor for the determination of catechol (CT) and hydroquinone (HQ). The modification was carried out through the electrodeposition of MOF-GO composites on the glassy carbon electrode and the transformation of MOF-GO to MOF-ERGO by an electrochemical reduction . Differential pulse voltammetry (DPV) was employed for exploring the electrochemical properties of the as-prepared electrode and the oxidation of CT and HQ at the modified electrode . Under the optimized experimental condition, the linear calibration curve was obtained in the range from 0.1 μM to 566 μM for CT ( R 2 = 0.997) and 0.1 μM to 476 μM for HQ ( R 2 = 0.999) with the same low detection limit of 0.1 μM ( S / N = 3). The experimental results showed that the modified electrode was easily fabricated in control and exhibited the outstanding stability. The validity for practical samples detection of CT and HQ was also demonstrated with satisfactory results.
研究领域:
分析化学
·
电化学传感器
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）