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Co3O4-CuNi/reduced graphene composite for non-enzymatic detection of ascorbic acid.

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Title: Co3O4-CuNi/reduced graphene composite for non-enzymatic detection of ascorbic acid.
Authors: Du, Jiawen1 (AUTHOR), Tao, Yiyang2 (AUTHOR), Zhang, Jie1 (AUTHOR), Xiong, Zhichen1 (AUTHOR), Xie, Aijuan1 (AUTHOR) aijuan_xie@126.com, Luo, Shiping1 (AUTHOR) shiping_luo@163.com, Li, Xiazhang1 (AUTHOR), Yao, Chao1 (AUTHOR)
Source: Materials Technology. Sep2019, Vol. 34 Issue 11, p665-673. 9p.
Subjects: Vitamin C, Carbon electrodes, Electrochemical sensors, Vitamins, Detection limit, Linear equations, Transcranial direct current stimulation
Abstract: A novel Co3O4-CuNi/graphene (Co3O4-CuNi/RGO) composite was developed by two-step hydrothermal method and used as non-enzymatic electrochemical sensor for ascorbic acid (AA) detection. A series of electrochemical detections declared that Co3O4-CuNi/RGO-modified glassy carbon electrode (GCE) has good electrocatalytic activity against AA oxidation, and the optimised sensor has low detection limit (0.34 μM), excellent stability, repeatability and selectivity. In the concentration range of 10-100 μM, the response current of the as-fabricated Co3O4-CuNi/RGO AA sensor is proportional to the AA concentration, and the linear equation can be denoted as Ipa(mA) = 1.006 + 0.378C (μM), the correlation coefficient R2 = 0.9917. Moreover, as compared to other reported electrodes, Co3O4-CuNi/RGO-modified GCE exhibited a comparable detection limit and provided a simple, easy, low-cost, and non-enzymatic method for AA detection. This highly sensitive Co3O4-CuNi/RGO can be further expanded to detect AA in vitamin C tablets, orange, vitamin water and other real samples. [ABSTRACT FROM AUTHOR]
Copyright of Materials Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Co<subscript>3</subscript>O<subscript>4</subscript>-CuNi/reduced graphene composite for non-enzymatic detection of ascorbic acid.
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  Data: <searchLink fieldCode="JN" term="%22Materials+Technology%22">Materials Technology</searchLink>. Sep2019, Vol. 34 Issue 11, p665-673. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Vitamin+C%22">Vitamin C</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+electrodes%22">Carbon electrodes</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+sensors%22">Electrochemical sensors</searchLink><br /><searchLink fieldCode="DE" term="%22Vitamins%22">Vitamins</searchLink><br /><searchLink fieldCode="DE" term="%22Detection+limit%22">Detection limit</searchLink><br /><searchLink fieldCode="DE" term="%22Linear+equations%22">Linear equations</searchLink><br /><searchLink fieldCode="DE" term="%22Transcranial+direct+current+stimulation%22">Transcranial direct current stimulation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A novel Co3O4-CuNi/graphene (Co3O4-CuNi/RGO) composite was developed by two-step hydrothermal method and used as non-enzymatic electrochemical sensor for ascorbic acid (AA) detection. A series of electrochemical detections declared that Co3O4-CuNi/RGO-modified glassy carbon electrode (GCE) has good electrocatalytic activity against AA oxidation, and the optimised sensor has low detection limit (0.34 μM), excellent stability, repeatability and selectivity. In the concentration range of 10-100 μM, the response current of the as-fabricated Co3O4-CuNi/RGO AA sensor is proportional to the AA concentration, and the linear equation can be denoted as Ipa(mA) = 1.006 + 0.378C (μM), the correlation coefficient R2 = 0.9917. Moreover, as compared to other reported electrodes, Co3O4-CuNi/RGO-modified GCE exhibited a comparable detection limit and provided a simple, easy, low-cost, and non-enzymatic method for AA detection. This highly sensitive Co3O4-CuNi/RGO can be further expanded to detect AA in vitamin C tablets, orange, vitamin water and other real samples. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials Technology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1080/10667857.2019.1612551
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        Text: English
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        PageCount: 9
        StartPage: 665
    Subjects:
      – SubjectFull: Vitamin C
        Type: general
      – SubjectFull: Carbon electrodes
        Type: general
      – SubjectFull: Electrochemical sensors
        Type: general
      – SubjectFull: Vitamins
        Type: general
      – SubjectFull: Detection limit
        Type: general
      – SubjectFull: Linear equations
        Type: general
      – SubjectFull: Transcranial direct current stimulation
        Type: general
    Titles:
      – TitleFull: Co3O4-CuNi/reduced graphene composite for non-enzymatic detection of ascorbic acid.
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            NameFull: Du, Jiawen
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            – D: 15
              M: 09
              Text: Sep2019
              Type: published
              Y: 2019
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