Institute of Chemistry, State University of Campinas, Inorganic Chemistry, Campinas, SP, Brazil.
Talanta. 2010 Nov 15;83(1):241-8. doi: 10.1016/j.talanta.2010.09.014. Epub 2010 Sep 16.
A film of niobium oxide was immobilized on a SiO(2)/C carbon-ceramic matrix (specific surface area 270 m(2)g(-1)) and characterized by N(2) adsorption-desorption isotherms, scanning electron microscopy, X-ray photoelectron spectroscopy and atomic force microscopy. This new carbon-ceramic material, SiO(2)/C/Nb(2)O(5), was used for construction of electrodes, and it shows ability to improve the electron-transfer between the electrode surface and ascorbic acid. The electrocatalytic oxidation of ascorbic acid was made by differential pulse and cyclic voltammetry techniques, making it potentially useful for developing a new ascorbic acid sensor.
氧化铌薄膜被固定在 SiO(2)/C 碳陶瓷基质（比表面积 270 m(2)g(-1)）上，并通过 N(2)吸附-解吸等温线、扫描电子显微镜、X 射线光电子能谱和原子力显微镜进行了表征。这种新型的碳陶瓷材料，SiO(2)/C/Nb(2)O(5)，被用于构建电极，并显示出能够改善电极表面和抗坏血酸之间的电子转移能力。通过差分脉冲和循环伏安技术实现了抗坏血酸的电催化氧化，这使其在开发新型抗坏血酸传感器方面具有潜在的应用价值。
