Electrochemical properties of mesoporous silica (SBA-15)-carbon electrode

• Main Authors: Jalil, M.N (Author), Noramira, S. (Author), Zain, Z.M (Author), Zaki, H.M (Author)
• Format: Article
• Language: English
• Published: Malaysian Society of Analytical Sciences 2019
• Subjects: Electrochemical properties; Mesoporous silica; Mesoporous silica-carbon electrode; SBA-15
• Online Access: View Fulltext in Publisher; View in Scopus
• ISBN: 13942506 (ISSN)
• ISSN: 13942506 (ISSN)
• DOI: 10.17576/mjas-2019-2302-03

Mesoporous silica is material that possesses the pore sizes between 2 nm to 50 nm which had expanded their applications rapidly. In this study, mesostructured SBA-15 was synthesized and characterized then the electrochemical behaviour being analysed to determine the current signal and the impedance of mesoporous silica carbon electrode. The material with pore sizes 5.5 nm was successfully synthesized by surfactant templating technique, using triblock copolymer pluronic (P123) as directing agent and tetraethyl orthosilicate (TEOS) as silica sources. The synthesized SBA-15 was characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), nitrogen adsorption-desorption and infra-red (IR). Two different electrodes were fabricated which carbon paste electrode (CPE) and hybrid SBA-15 with carbon paste electrode (SBA-15/MCPE) and analysed using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The SBA-15/MCPE results better adsorption and enhanced the response signal to 30% and lower resistance compared to CPE with 179Ω and 187Ω respectively due to addition of meso-sites which improved the electron pathway This study demonstrates that mesoporous silica (SBA-15) can be considered as promising material in development of high performance, lightweight and flexible devices in electrochemistry. © 2019, Malaysian Society of Analytical Sciences. All rights reserved.