Application of Cuprous Oxide Nanowires in an Electrochemical Sensor for Ascorbic Acid

Abstract

A promising electrochemical sensor of ascorbic acid (AA) was constructed based on cuprous oxide nanowires with coarse surface. The sensor exhibited excellent electrocatalytic performance for AA determination in alkaline medium.

The fabrication of an Ni6MnO8 nanoflake-modified acupuncture needle electrode for highly sensitive ascorbic acid detection

“…It is quite fascinating to observe that the oxidation peak currents are in proportion to the square root of the scan rate between 50 and 280 mV s −1 , which indicates that the diffusion-controlled process occurs at the altered electrode. 29 This result suggests reliable and fast electron transfer kinetics at the surface of the electrode, which is advantageous for amperometric sensing.…”

“…At rst, the highly dense nanoakes could provide an extensive surface region for solution percolation, causing a rise in the electrochemically active surface sites, accordingly giving rise to outstanding sensing efficiency. 10,29 Second, a synergetic effect from the combination of NiO and MnO 2 likely augmented the catalytic efficiency of the nano-akes, further promoting the oxidation of AA. 35 In contrast, it is evident from Fig.…”

Application of Hierarchical CuO Bowl-like Array Film to Amperometric Detection of L-Ascorbic Acid

“…The normal physiological level of AA is generally much higher (100 -1000 times) than that of dopamine. 41,42 Thus, the concentration of interfering substances added was one-tenth of the ascorbic acid concentration. Compared with the strong current response achieved with AA, obvious fluctuation was not observed with the injection of interferents as shown in Table 3.…”

An Enzyme-Free Photoelectrochemical Sensor Platform for Ascorbic Acid Detection in Human Urine

“…Those methods often need the support of large equipment, complex testing process, low efficiency, and high testing costs. Due to the inherent characteristics of the electrochemical sensor [28][29][30], it provides a promising detection mode for the rapid determination of the concentration of AA, which also provides the possibility of product conversion [31,32]. However, achieving high sensitivity and wide detection range is the major challenge for the electrochemical sensor in practical applications [13].…”