Preparation of CuO-Nanoparticle-Modified Electrode and Its Application in the Determination of Rutin

Abstract

In this article, highly pure, well-dispersed, 10-nm CuO nanoparticles were obtained by a hydrothermal reduction process, with oxalic acid as precipitator. The CuO nanoparticles were characterized by x-ray powder diffraction, field-emission scanning electron microscopy, and high-resolution transmission electron microscopy. The CuO nanoparticles were modified onto a gold electrode to study the effect on the redox of the rutin. Cyclic voltammetry results show that the CuO nanoparticles were very active for rutin and that the CuO-nanoparticle-modified electrode can even determine rutin in a certain range of concentration from 5.0 × 10⁻⁷ to 5.0 × 10⁻⁴ mol L⁻¹ by differential pulse voltammertry, which provides a new application for CuO nanoparticles.

Keywords:

• CuO nanoparticles
• modified electrode
• rutin

Acknowledgments

We deeply appreciated the support from the Foundation for Doctoral Science Research of Anhui Normal University, the Natural Science Foundation of Educational Department of Anhui Province (No. KJ2008B167), and the National Natural Science Foundation of China (No.20675001).