Journal
TALANTA
Volume 200, Issue -, Pages 300-306Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2019.03.071
Keywords
Biomass waste; Electrochemical biosensor; Nanosheets; Vitamin C
Categories
Funding
- National Natural Science Foundation of China [21605015]
- Development Project of Science and Technology of Jilin Province [20170101176JC]
- Fundamental Research Funds for the Central Universities [2412017BJ003]
- project of Jilin Province Science and Technology Department Outstanding Young Talents Foundation [20170520160JH]
- Recruitment Program of Global Youth Experts
- Jilin Provincial Department of Education
- Northeast Normal University
- Analysis and Testing Center of Northeast Normal University
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In this work, the low-cost nitrogen-doped graphene-like mesoporous nanosheets (N-GMNs) was synthesized from the biomass waste of okara for the first time for the construction of a nonenzymatic amperometric vitamin C biosensor. The N-GMNs modified glassy carbon electrode (N-GMNs/GCE) shows much lower overpotential for the electrooxidation of vitamin C comparing to the traditional GCE as well as the GCE modified by carbon nanotubes (CNTs/GCE), indicating the promising of N-GMNs/GCE for the sensitive and selective nonenzymatic amperometric vitamin C biosensing. As a nonenzymatic amperometric biosensor for vitamin C, the N-GMNs/GCE shows a higher sensitivity (144.65 mu A mM(-1) cm(-2)), a wider linear range (10-5640 mu mol L-1) and a lower detection limit (0.51 mu mol L-1) than GCE, CNTs/GCE or some of recently reported nanomaterials-based electrochemical vitamin C biosensors. Especially, the vitamin C concentration in real samples of commercial beverage, vitamin C injection and commercial juice can be determined by the proposed N-GMNs/GCE with satisfied results. Therefore, the utilization of okara as the raw material for the synthesis of nanostructured carbon of N-GMNs is a green method to fabricate an advanced and low-cost electrode material for developing the nonenzymatic electrochemical biosensor for vitamin C detection.
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