Development of Anodic Titanium Oxide Nanotubes Applied to a pH Sensor with Amperometric and Potentioimetric Methods

Abstract

The purpose of this study was to develop the anodized titanium oxide nanotubes (ATONs) as a pH electrode with amperometric and potentiometric method. Titanium oxide nanotubes film was produced on pure titanium piece by titanium anodization at room temperature. The best one ATONs electrode has a linear pH response approximately 53 mV/pH with potentiometric method and 13 A/pH with amperometric method in the concentration range between pH 2 and 12.

Recent Developments in R.F. Magnetron Sputtered Thin Films for pH Sensing Applications—An Overview

“…On the other hand, electrochemical methods are typically straightforward and inherently quantitative, and require simpler operation and setups. Electrochemical methods, however, have downsides, such as long-term instability and vulnerability to electrode fouling, but nevertheless, they are the most commonly used methods for pH detection, whereby the potential (potentiometric) [20,21,[51][52][53][54][55][56], current (amperometric) [57][58][59][60][61][62][63], or charge in an electrochemical cell serve as the analytical signals. Indeed, the glass electrode is currently the most commonly used electrochemical sensor for potentiometric pH measurements.…”