Preparation and Characterization Of Chitosan-Glutaraldehyde/Zinc Oxide Nanoparticles Electrodes Anceu Murniati1, Restu Muchammad Ibrahim1, Intan Mulya Ewangga1, Esti1, Buchari Buchari2, Suryo Gandasasmita2, Zeily Nurachman3, Arie Hardian1, Jasmansyah1 , Hernandi Sujono1 and Senadi Budiman1
1Analytical Chemistry Research Group, Faculty of Sciences and Informatics
Universitas Jenderal Achmad Yani, Jl. Terusan Jenderal Sudirman, Cimahi, Indonesia
2Analytical Chemistry Research Group, Faculty of Mathematics and Natural Sciences,
Bandung Institute of Technology, Jl. Ganesha No. 10 Bandung 40132, Indonesia
3Biochemistry Research Group, Faculty of Mathematics and Natural Sciences,
Bandung Institute of Technology, Jl. Ganesha No. 10 Bandung 40132, Indonesia
Abstract
Currently, the development of biosensors using chitosan is a concern, because it is abundant, non-toxic, and environmentally friendly. Biosensors based on chitosan have advantages such as fast response, high conductivity, good repeatability, and relatively low cost. However, chitosan has a weakness with its rigid and brittle nature, so some other chemicals are needed to improve its functional properties. In this research, the addition of glutaraldehyde and zinc oxide (ZnO) are studied which are expected to improve the mechanical properties of the biosensor for formaldehyde detection applications. Chitosan-glutaraldehyde/ZnO nanoparticle modified copper working electrode preparation was prepared by heating for about 30 minutes (a mixture of 2% chitosan, 0.6% ZnO nanoparticles, and 1% Glutaraldehyde) until a thin film was formed on the surface of the Cu working electrode. The characterization of the working electrode has been studied using cyclic voltammetry in two supporting electrolyte solutions, namely 0.1 M phosphate buffer pH 7.0 and 0.01 M K3[Fe(CN6)] solution. The results of the study obtained a cyclic voltammogram profile at a scan rate of 25, 50, 75, and 100 mV/s with a potential window of -1,000 mV to 1,000 mV. Cyclic voltammogram information provides a stable and optimal response at a scan rate of 75 mV/s using 0.1 M phosphate buffer solution pH 7.0 and a scan rate of 50 mV/s using 0.01 M K3[Fe(CN6)] solution. Chitosan-Glutaraldehyde/Zn) the nanoparticle-modified copper working electrode has been characterized based on FTIR and SEM-EDS images
