Preparation of Indium Tin Oxide Nanoparticle‐modified 3‐Aminopropyltrimethoxysilane‐functionalized Indium Tin Oxide Electrode for Electrochemical Sulfide Detection. Issue 7 (4th April 2017)

• Record Type: Journal Article
• Authors: Aziz, Md. Abdul; Mahfoz, Wael; Nasiruzzaman Shaikh, M.; Zahir, Md. Hasan; Al‐Betar, Abdul‐Rahman; Oyama, Munetaka; Theleritis, Demetrios; Yamani, Zain Hassan
• Is Part Of: Electroanalysis. Volume 29:Issue 7(2017)
• Page Start: 1683
• Page End: 1690
• Publication Date: 2017-04-04
• Subjects: ITO-nanoparticle-modified ITO -- electrocatalytic properties -- sulfide sensor -- amperometry -- chronocoulometry; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201700058
• Languages: English
• ISSNs: 1040-0397

Abstract

Abstract: A sulfide sensor based on an indium tin oxide nanoparticle (ITONP)‐modified ITO electrode was developed. To prepare ITONP‐modified ITO, various methods were tested. Drop‐drying of ITONPs (aq.) on aminopropyltrimethoxysilane‐functionalized ITO (APTMS/ITO) was found to be the best method on the basis of voltammetric analysis of the sulfide ion. ITONP‐modified APTMS/ITO (ITONP/APTMS/ITO) yielded much better electrocatalytic properties toward sulfide electro‐οxidation than did bare or APTMS/ITO electrodes. The ITONPs and ITONP‐modified ITO were also characterized using transmission electron microscopy and field emission scanning electron microscopy, respectively. Optimization of the type of inert electrolyte and pH yielded an ITONP/APTMS/ITO detector whose amperometrically and chronocoulοmetrically determined limits of detection for sulfide were 3.0 μM and 0.90 μM, respectively. ITONP/APTMS/ITO electrodes displayed reproducible performance, were highly stable, and were not susceptible to interference by common contaminants. Thus, the developed electrode can be considered as a promising tool for sensing sulfide. Abstract :