Ascorbic acid amperometric sensor using a graphene-wrapped hierarchical TiO2 nanocomposite
-
Li Fu
,
Yu-Hong Zheng
Abstract
An ascorbic acid (AA) amperometric sensor was fabricated based on a glassy carbon electrode (GCE) modified with a reduced graphene oxide-wrapped hierarchical TiO2 (RGO-TiO2) nanocomposite. The RGO-TiO2 nanocomposite was synthesized via the facial wet chemical method and characterized by scanning electron microscopy and X-ray diffraction. Cyclic voltammetry and amperometric techniques were employed to investigate its electrocatalytic performance towards the AA oxidation. The combined advantages of RGO and TiO2 provide the electrode with higher current response and lower oxidation potential compared with those of bare GCE and TiO2 modified GCE. The proposed electrode can be used for the determination of AA in the wide concentration range from 1 to 1500 μM with the detection limit of 0.5 μM. The proposed electrode was successfully used to determine AA in vitamin C tablets and spiked fruit juice.
References
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© 2015
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Artikel in diesem Heft
- Perovskite ceramics and recent experimental progress in reactor design for chemical looping combustion application
- Total reflection X-ray fluorescence analysis of fly ash from Bulgarian coal-fired power plants
- Ascorbic acid amperometric sensor using a graphene-wrapped hierarchical TiO2 nanocomposite
- Rapid determination of products of phenol hydrogenation in a supercritical water system using headspace gas chromatography
- Swelling of N-vinylcaprolactam–dodecyl methacrylate gel in {heptane + toluene} mixtures
- Extraction of Cu(II) with Acorga M5640 using hollow fibre liquid membrane
- Heat transfer in a jacketed agitated vessel equipped with multistage impellers
- Seasonal variation in alkaloid composition and antiproliferative activity of Stylophorum lasiocarpum (Oliv.) Fedde
- A polyacrylate prepared using polyurethane surfactants: properties of emulsion and film
- Efficient synthesis of glutaric acid from L-glutamic acid via diazoniation/hydrogenation sequence
- New insights into bromination process: effective preparation of Ambroxol
- A concise route to 4-aminomethylpyrazoles and 4-aminomethylisoxazoles from acetylacetone-derived hexahydropyrimidines under mild conditions
- Assessment of non-standard reaction conditions for asymmetric 1,3-dipolar organocatalytic cycloaddition of nitrone with α,β-unsaturated aldehydes
- β-Cyclodextrin as water-solubility enhancer for butylated hydroxytoluene
- Asymmetric polymerisation of substituted phenylacetylene using chiral Rh(2,5-norbornadiene)(L-proline) catalyst
