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Ahmed YM, Eldin MA, Galal A, Atta NF. Electrochemical sensor based on PEDOT/CNTs-graphene oxide for simultaneous determination of hazardous hydroquinone, catechol, and nitrite in real water samples. Sci Rep 2024; 14:5654. [PMID: 38454022 PMCID: PMC10920748 DOI: 10.1038/s41598-024-54683-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 02/15/2024] [Indexed: 03/09/2024] Open
Abstract
Hydroquinone (HQ), catechol (CC) and nitrite (NT) are considered aquatic environmental pollutants. They are highly toxic, harm humans' health, and damage the environment. Thus, in the present work we introduce a simple and efficient electrochemical sensor for determination of HQ, CC, and NT simultaneously in wastewater sample. The sensor is fabricated by modifying the surface of a glassy carbon electrode (GCE) by two successive thin films from poly(3,4-ethylenedioxythiophene) (PEDOT) and a mixture of carbon nanotubes-graphene oxide (CNT-GRO). Under optimized conditions the HQ, CC, and NT are successfully detected simultaneously in wastewater sample with changing their concentrations in the ranges (0.04 → 100 µM), (0.01 → 100 µM) and (0.05 → 120 µM), the detection limits are 8.5 nM, 3.8 nM and 6.1 nM, respectively. Good potential peak separations: 117 mV and 585 mV are obtained between the HQ-CC, and CC-NT. The sensor has an excellent catalytic capability toward the oxidation of HQ, CC, and NT due to good synergism between its composite components: PEDOT, GRO and CNTs. The features of the sensor are large active surface area, good electrical conductivity, perfect storage stability, good reproducibility, anti-interference capability and accepted recovery rate for HQ, CC, and NT determination in wastewater sample.
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Affiliation(s)
- Yousef M Ahmed
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Mahmoud A Eldin
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Ahmed Galal
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Nada F Atta
- Chemistry Department, Faculty of Science, Cairo University, Giza, 12613, Egypt.
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Ag nanoparticle in situ decorated on Ti 3C 2T x with excellent SERS and EIS immunoassay performance for beta-human chorionic gonadotropin. Mikrochim Acta 2022; 189:348. [PMID: 36002597 DOI: 10.1007/s00604-022-05426-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 07/21/2022] [Indexed: 10/15/2022]
Abstract
Two-dimensional transition metal carbides, nitrides, and carbonitrides (MXene), with excellent optical and electrical properties, are promising substrates for surface-enhanced Raman scattering (SERS) and electrochemical sensors. Therefore, a unique 3D-decorated structure containing silver (Ag) nanoparticles and Ti3C2Tx was designed as the substrates of SERS and electrochemical impedance spectroscopy (EIS) immunosensors. The Ag/Ti3C2Tx composite significantly increases Raman intensity, which is attributed to the synergistic effect of Ti3C2Tx and Ag nanoparticles. Based on the SERS performance of the Ag/Ti3C2Tx composite, the magnetic properties of Fe3O4 and the specificity of antigen-antibody, a sandwich-structured SERS immunosensor is constructed, which can effectively detect trace amounts of beta-human chorionic gonadotropin (β-hCG). The SERS immunosensor exhibits a wide linear range of 5.0 × 10-6-1.0 mIU mL-1, and a low detection limit of 9.0 × 10-7 mIU mL-1. Meanwhile, the Ag/Ti3C2Tx-based EIS immunosensor is constructed for the portable detection of β-hCG, which exhibits a wide linear range of 5.0 × 10-2-1.0 × 102 mIU mL-1, a low detection limit of 9.5 × 10-3 mIU mL-1. Moreover, two immunosensors can be used to detect actual serum samples with satisfactory recovery (98.5-102.2%). This work could guide the design of low-cost, sensitive, flexible, and portable biosensors. The SERS and EIS substrates composited with Ti3C2Tx and Ag nanoparticles enable excellent performance for detecting β-hCG.
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Lu Z, Wang Y, Zhu Y, Hasebe Y, Zhang Z. Popcorn‐Derived Porous Carbon Based Electrochemical Sensor for Simultaneous Determination of Hydroquinone, Catechol and Nitrite. ChemistrySelect 2022. [DOI: 10.1002/slct.202200148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhenyong Lu
- School of Chemical Engineering University of Science and Technology Liaoning 185 Qianshan Middle Road, High-tech Zone Anshan Liaoning 114051 China
| | - Yue Wang
- School of Chemical Engineering University of Science and Technology Liaoning 185 Qianshan Middle Road, High-tech Zone Anshan Liaoning 114051 China
| | - Yaming Zhu
- School of Chemical Engineering University of Science and Technology Liaoning 185 Qianshan Middle Road, High-tech Zone Anshan Liaoning 114051 China
| | - Yasushi Hasebe
- Department of Life Science and Green Chemistry Faculty of Engineering Saitama Institute of Technology 1690 Fusaiji Fukaya Saitama 369-0293 Japan
| | - Zhiqiang Zhang
- School of Chemical Engineering University of Science and Technology Liaoning 185 Qianshan Middle Road, High-tech Zone Anshan Liaoning 114051 China
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Arumugam B, Ramaraj SK. Insights into the Design and Electrocatalytic Activity of Magnesium Aluminum Layered Double Hydroxides: Application to Nonenzymatic Catechol Sensor. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4848-4858. [PMID: 35413192 DOI: 10.1021/acs.langmuir.1c03494] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The design of an efficient electrocatalyst for effective trace level determinations of noxious synthetic and or biological compounds is the unceasingly noteworthy conceptual approach for rapid technology. In this work, we designed a magnesium-aluminum layered double hydroxides (Mg-Al LDHs) nanocatalyst and applied it to the electrocatalytic determination of an extremely carcinogenic catechol sensor. A coprecipitation method was employed for synthesizing the nanocatalyst, and the structure, porous nature, and morphology were confirmed by X-ray diffraction, Fourier transform infrared spectroscopy, N2 adsorption-desorption isotherm, field emission-scanning electron microscopy, and transmission electron microscopy. The elemental composition was observed by energy dispersive X-ray analysis. The electrochemical studies were investigated with the help of cyclic voltammetry and differential pulse voltammetry techniques. The Mg-Al LDHs-based electrocatalyst was used to detect catechol by electrochemical measurements with different parameters. The proposed catechol sensor shows a wide dynamic range (0.007-200 μM) with a lower level of detection (2.3 nm) and sensitivity (3.57 μA μM-1 cm-2). The excellent sensor performance is attributed to the high surface area, fast electron transfer, more active sites, and excellent flexibility. This study depicts the proposed sensor as probable to practical in a scientific investigation. In addition, the modified electrode showed greater selectivity and was used in the detection of fatal contaminants in instant treatment strategies. Moreover, the Mg-Al LDHs confirmed auspicious real sample scrutiny with noteworthy retrieval outcomes in lake water samples which exposed improved consequences.
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Affiliation(s)
- Balamurugan Arumugam
- PG & Research Department of Chemistry, Thiagarajar College, Madurai - 625009, Tamil Nadu India
| | - Sayee Kannan Ramaraj
- PG & Research Department of Chemistry, Thiagarajar College, Madurai - 625009, Tamil Nadu India
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Cobalt Oxide Nanorod-Modified GCE as Sensitive Electrodes for Simultaneous Detection of Hydroquinone and Catechol. Processes (Basel) 2022. [DOI: 10.3390/pr10020390] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
An electrochemical sensor based on a cobalt oxide nanorod (Co3O4NR) modified glassy carbon electrode (GCE) (Co3O4NR-GCE) was prepared for simultaneous and selective determination of hydroquinone (HQ) and catechol (CT). Surface morphology and crystallinity of Co3O4NR were investigated employing field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD) analysis. The structure (16 nm) of the Co3O4 nanorod was observed in the FESEM image. A sharp peak pattern in the XRD survey revealed the following crystal planes in Co3O4NR material: (111), (220), (311), (222), (400), (422), (511), and (440). Electrochemical characterization of modified Co3O4NR-GCE was carried out performing cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Selective and simultaneous detection of HQ and CT was carried out by performing CV and differential pulse voltammetry (DPV) analysis. In both studies, modified Co3O4NR-GCE showed well defined oxidation and reduction peaks for HQ and CT with enhanced peak current, and the oxidation peaks for HQ and CT were observed at 0.152 V and 0.254 V, respectively, in the CV analysis. Scan rate and pH variation analysis were performed to evaluate different kinetic parameters, including charge transfer coefficient (α = 0.56 for HQ and 0.66 for CT), heterogeneous charge transfer rate constant (ks = 56 for HQ and 72 for CT), and the number of electrons involved in HQ and CT oxidation. Quantitative analysis of HQ and CT was studied by observing the current response of DPV analysis with respect to concentration variation. Here, the detection limit was calculated as 0.2 µM for HQ with a linear concentration range of 5–200 µM, and 0.4 µM for CT with a linear concentration range of 5–150 µM. The practical applicability of the proposed sensor was investigated using sample solutions prepared in tap water. The reported sensor showed impressive selectivity towards HQ and CT in the presence of common interferents.
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Lu Z, Wang Y, Hasebe Y, Zhang Z. Electrochemical Sensing Platform Based on Lotus Stem‐derived Porous Carbon for the Simultaneous Determination of Hydroquinone, Catechol and Nitrite. ELECTROANAL 2020. [DOI: 10.1002/elan.202060478] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Zhenyong Lu
- School of Chemical Engineering University of Science and Technology Liaoning 185 Qianshan Middle Road, High-tech zone, Anshan Liaoning 114051 China
| | - Yue Wang
- School of Chemical Engineering University of Science and Technology Liaoning 185 Qianshan Middle Road, High-tech zone, Anshan Liaoning 114051 China
| | - Yasushi Hasebe
- Department of Life Science and Green Chemistry Saitama Institute of Technology 1690 Fusaiji, Fukaya Saitama 369-0293 Japan
| | - Zhiqiang Zhang
- School of Chemical Engineering University of Science and Technology Liaoning 185 Qianshan Middle Road, High-tech zone, Anshan Liaoning 114051 China
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Review on applications of carbon nanomaterials for simultaneous electrochemical sensing of environmental contaminant dihydroxybenzene isomers. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.05.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Wang X, Cheng Z, Zhou Y, Tammina SK, Yang Y. A double carbon dot system composed of N, Cl-doped carbon dots and N, Cu-doped carbon dots as peroxidase mimics and as fluorescent probes for the determination of hydroquinone by fluorescence. Mikrochim Acta 2020; 187:350. [PMID: 32462301 DOI: 10.1007/s00604-020-04322-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 05/14/2020] [Indexed: 01/14/2023]
Abstract
A fluorescence method is described for the determination of hydroquinone based on the double carbon dot system as peroxide mimic enzymes and fluorescent probes. Deep eutectic solvent (DES)-based fluorescent carbon dots (N/Cl-CDs) and copper-doped carbon dots (N/Cu-CDs) were prepared by the hydrothermal method. Both carbon dots were characterized with transmission electron microscopy (TEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), ultraviolet-visible (UV-Vis) spectroscopy, X-ray photoelectron spectrometry (XPS), Fourier transform infrared (FT-IR) spectroscopy, and fluorescence spectroscopy. N/Cl-CDs displayed intrinsic peroxidase-like activity and were able to catalyze the oxidation of hydroquinone (H2Q) to p-benzoquinone (BQ) along with an intermediate. The intermediate (BQ) did quench the N/Cu-CD photoluminescence (PL) at 450 nm using an excitation wavelength of 347 nm. Based on the results, a fluorescent platform is proposed for the determination of hydroquinone with a promising determination limit of 0.04 μM (linear range, 1.0-75 μM). The recoveries of spiked water samples were in the range 89.5-105.1%, with relative standard deviations (RSDs) of 1.5-2.9%. This method was applied to determination of H2Q in environmental water samples. Graphical abstract A fluorescence method was established for the determination of hydroquinone based on the double carbon dot system as peroxide-mimic enzymes and fluorescent probes. Chlorine-doped carbon dots (N/Cl-CDs) derived from deep eutectic solvent (DES) displayed intrinsic peroxidase-like activity, and were able to catalyze the oxidation of hydroquinone (H2Q) to p-benzoquinone (BQ) along with an intermediate. The intermediate (BQ) did quench the N/Cu-CD photoluminescence (PL). This method was applied to H2Q in environmental water samples.
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Affiliation(s)
- Xiuli Wang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan Province, China
| | - Zhili Cheng
- Technology Centre of China Tobacco Guangxi Industrial Co., Ltd., Nanning, 530001, China
| | - Yun Zhou
- Technology Centre of China Tobacco Guangxi Industrial Co., Ltd., Nanning, 530001, China
| | - Sai Kumar Tammina
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan Province, China
| | - Yaling Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, 650500, Yunnan Province, China.
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Lanthanum cobaltite supported on graphene nanosheets for non-enzymatic electrochemical determination of catechol. Mikrochim Acta 2020; 187:189. [DOI: 10.1007/s00604-020-4165-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 02/13/2020] [Indexed: 11/26/2022]
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Xiao Y, Huang W, Zhu D, Wang Q, Chen B, Liu Z, Wang Y, Liu Q. Cancer cell membrane-camouflaged MOF nanoparticles for a potent dihydroartemisinin-based hepatocellular carcinoma therapy. RSC Adv 2020; 10:7194-7205. [PMID: 35493895 PMCID: PMC9049790 DOI: 10.1039/c9ra09233a] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 01/30/2020] [Indexed: 01/10/2023] Open
Abstract
Developing new drugs for cancer treatment remains a challenging task. Herein, cancer cell membrane biomimetic ferrous ion-doped metal-organic framework nanoparticles (ZIF-8 nanoparticles) combined with dihydroartemisinin (DHA) have been designed for targeted cancer treatment with low toxicity and side effects. The biomimetic nanomaterials (CDZs) have excellent homologous targeting ability and can accumulate in tumor tissues. In an acid tumor microenvironment, ferrous ions and DHA could be released with the degradation of materials. DHA, an ancient Chinese medicine, combines with ferrous ions to produce a powerful anti-tumor effect. In human liver cancer models, about 90.8% of tumor growth was suppressed. In addition, the nanomaterial has no obvious toxic and side effects in vivo and is a highly effective and low-toxicity anti-tumor drug with a strong clinical application value.
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Affiliation(s)
- Yusha Xiao
- Department of General Surgery, Research Center of Digestive Diseases Zhongnan Hospital of Wuhan University Wuhan 430071 Hubei P. R. China
| | - Wei Huang
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou 225009 Jiangsu P. R. China
| | - Daoming Zhu
- Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education, School of Physics and Technology, Wuhan University Wuhan 430071 Hubei P. R. China
| | - Quanxiong Wang
- Department of General Surgery, Research Center of Digestive Diseases Zhongnan Hospital of Wuhan University Wuhan 430071 Hubei P. R. China
| | - Baiyang Chen
- Department of General Surgery, Research Center of Digestive Diseases Zhongnan Hospital of Wuhan University Wuhan 430071 Hubei P. R. China
| | - Zhisu Liu
- Department of General Surgery, Research Center of Digestive Diseases Zhongnan Hospital of Wuhan University Wuhan 430071 Hubei P. R. China
| | - Yang Wang
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou 225009 Jiangsu P. R. China
| | - Quanyan Liu
- Department of General Surgery, General Hospital of Tianjin Medical University Tianjin 300052 China
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LIU HY, ZHU LL, HUANG ZH, QIU YB, XU HX, WEN JJ, XIONG WW, LI LH, GU CC. Simultaneous Detection of Hydroquinone, Catechol and Resorcinol by an Electrochemical Sensor Based on Ammoniated-Phosphate Buffer Solution Activated Glassy Carbon Electrode. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2019. [DOI: 10.1016/s1872-2040(19)61183-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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3D-Flower-Like Copper Sulfide Nanoflake-Decorated Carbon Nanofragments-Modified Glassy Carbon Electrodes for Simultaneous Electrocatalytic Sensing of Co-existing Hydroquinone and Catechol. SENSORS 2019; 19:s19102289. [PMID: 31108985 PMCID: PMC6567201 DOI: 10.3390/s19102289] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/23/2019] [Accepted: 04/24/2019] [Indexed: 02/04/2023]
Abstract
A copper sulfide nanoflakes-decorated carbon nanofragments-modified glassy carbon electrode (CuS-CNF/GCE) was fabricated for the electrocatalytic differentiation and determination of hydroquinone (HQ) and catechol (CC). The physicochemical properties of the CuS-CNF were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. The electrocatalytic determination of HQ and CC over the CuS-CNF/GCE was evaluated by cyclic voltammetry and differential pulse voltammetry. An excellent detection limit and sensitivity of the CuS-CNF/GCE are obtained (0.293 µM and 0.259 µM) with a sensitivity of 184 nA µM−1 cm−2 and 208 nA µM−1 cm−2 (S/N=3) for HQ and CC, respectively. In addition, the CuS-CNF/GCE shows a selective identification of HQ and CC over potential interfering metal ions (Zn2+, Na+, K+, NO3−, SO42−, Cl−) and organic compounds (ascorbic acid, glucose), and a satisfactory recovery is also obtained in the spiked water samples. These results suggest that the CuS-CNF/GCE can be used as an efficient electrochemical sensor for the simultaneous determination of co-existing environmental pollutants such as HQ and CC in water environments with high selectivity and acceptable reproducibility.
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Ren H, Zhang Y, Liu L, Li Y, Wang D, Zhang R, Zhang W, Li Y, Ye BC. Synthesis of hollow Mo 2C/carbon spheres, and their application to simultaneous electrochemical detection of hydroquinone, catechol, and resorcinol. Mikrochim Acta 2019; 186:306. [PMID: 31030332 DOI: 10.1007/s00604-019-3432-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 04/10/2019] [Indexed: 10/26/2022]
Abstract
Hollow molybdenum-dopamine spheres were synthesized and thermally annealed to form hollow Mo2C/C spheres. The morphology, composition and electrochemical behavior of spheres were characterized. A glassy carbon electrode (GCE) was modified with the spheres and then used for simultaneous detection of hydroquinone (HQ), catechol (CC), and resorcinol (RS). Distinct oxidation peaks can be observed for HQ, CC and RS at potentials of -0.004 V, 0.10 V and 0.44 V (vs. SCE). The responses to HQ, CC and RS are linear in the concentration ranges of 0.3~1000 μM, 2~2000 μM and 3~600 μM, respectively. The corresponding detection limits are 0.12, 0.19 and 1.1 μM (at S/N = 3). The sensor was then applied to quantify HQ, CC, and RS in tap water, river water and vegetable juice. Recoveries ranged from 93.5% to 106.5%. The modified GCE is repeatable, reproducible, stable and selective for HQ, CC and RS. Graphical abstract Schematic presentation of a novel electrochemical sensor based on a glassy carbon electrode modified with hollow Mo2C/ carbon spheres for determination of hydroquinone, catechol, and resorcinol.
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Affiliation(s)
- Hailong Ren
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China
| | - Yang Zhang
- College of Science, Harbin Institute of Technology, Shenzhen, 518055, China
| | - Longlong Liu
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China
| | - Yangguang Li
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China
| | - Dongyang Wang
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China
| | - Ruyue Zhang
- Key Laboratory of Xinjiang Phytomedicine Resources for Ministry of Education, School of Pharmacy, Shihezi University, Shihezi, 832000, China
| | - Wenjing Zhang
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China
| | - Yingchun Li
- College of Science, Harbin Institute of Technology, Shenzhen, 518055, China. .,Key Laboratory of Xinjiang Phytomedicine Resources for Ministry of Education, School of Pharmacy, Shihezi University, Shihezi, 832000, China.
| | - Bang-Ce Ye
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, 832003, China. .,State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, 200237, China.
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Voltammetric simultaneous determination of catechol and hydroquinone using a glassy carbon electrode modified with a ternary hybrid material composed of reduced graphene oxide, magnetite nanoparticles and gold nanoparticles. Mikrochim Acta 2019; 186:177. [DOI: 10.1007/s00604-019-3273-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 01/20/2019] [Indexed: 01/17/2023]
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A carbon paste electrode modified with a nickel titanate nanoceramic for simultaneous voltammetric determination of ortho- and para-hydroxybenzoic acids. Mikrochim Acta 2018; 186:12. [PMID: 30535660 DOI: 10.1007/s00604-018-3113-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 11/25/2018] [Indexed: 10/27/2022]
Abstract
An electrochemical sensor is described for the simultaneous determination of ortho-hydroxybenzoic acid (OHB) and para-hydroxybenzoic acid (PHB). The sensor consists of a carbon paste electrode modified with nickel titanate nanoceramics (NiTiO3/CPE). The NiTiO3 nanoceramics and the nanostructured modified CPE were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, electrochemical impedance spectroscopy and cyclic voltammetry. Differential pulse voltammetry indicates that the response to OHB (best measured at 0.90 V vs. Ag/AgCl) and PHB (measured at 0.80 V vs. Ag/AgCl) is significantly improved at the modified CPE compared to a bare CPE. The limits of detection (at S/N = 3) are 0.38 and 0.10 μM for OHB and PHB, respectively. The method was applied to the determination of the two isomers in peeling skin lotion and during the Kolbe-Schmitt reaction. Graphical abstract Nickel titanate nanoceramics (NiTiO3) were synthesized by a sol-gel method. Then, a carbon paste electrode modified with NiTiO3 (NiTiO3/CPE) was constructed. The modified electrode was applied to the interference-free and simultaneous determination of ortho-hydroxybenzoic acid (OHB) and para-hydroxybenzoic acid (PHB).
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Naghian E, Najafi M. Carbon paste electrodes modified with SnO2/CuS, SnO2/SnS and Cu@SnO2/SnS nanocomposites as voltammetric sensors for paracetamol and hydroquinone. Mikrochim Acta 2018; 185:406. [DOI: 10.1007/s00604-018-2948-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/02/2018] [Indexed: 11/25/2022]
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