Facile synthesis of flower like copper oxide and their application to hydrogen peroxide and nitrite sensingReport as inadecuate




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Chemistry Central Journal

, 5:75

Analytical Chemistry

Abstract

BackgroundThe detection of hydrogen peroxide H2O2 and nitrite ion NO 2 - Open image in new window is of great important in various fields including clinic, food, pharmaceutical and environmental analyses. Compared with many methods that have been developed for the determination of them, the electrochemical detection method has attracted much attention. In recent years, with the development of nanotechnology, many kinds of micro-nano-scale materials have been used in the construction of electrochemical biosensors because of their unique and particular properties. Among these catalysts, copper oxide CuO, as a well known p-type semiconductor, has gained increasing attention not only for its unique properties but also for its applications in many fields such as gas sensors, photocatalyst and electrochemistry sensors. Continuing our previous investigations on transition-metal oxide including cuprous oxide and α-Fe2O3 modified electrode, in the present paper we examine the electrochemical and electrocatalytical behavior of flower like copper oxide modified glass carbon electrodes CuO-GCE.

ResultsFlower like copper oxide CuO composed of many nanoflake was synthesized by a simple hydrothermal reaction and characterized using field-emission scanning electron microscopy FE-SEM and X-ray diffraction XRD. CuO modified glass carbon electrode CuO-GCE was fabricated and characterized electrochemically. A highly sensitive method for the rapid amperometric detection of hydrogen peroxide H2O2 and nitrite NO 2 - Open image in new window was reported.

ConclusionsDue to the large specific surface area and inner characteristic of the flower like CuO, the resulting electrode show excellent electrocatalytic reduction for H2O2 and oxidation of NO 2 - Open image in new window. Its sensitivity, low detection limit, fast response time and simplicity are satisfactory. Furthermore, this synthetic approach can also be applied for the synthesis of other inorganic oxides with improved performances and they can also be extended to construct other micro-nano-structured functional surfaces.

Electronic supplementary materialThe online version of this article doi:10.1186-1752-153X-5-75 contains supplementary material, which is available to authorized users.

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Author: Li Zhang - Feifei Yuan - Xiaohu Zhang - Liming Yang

Source: https://link.springer.com/







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