The Influence of Drying Temperature on the pH Sensitivity of TiO2 based Integrated All-Solid Electrodes (IASE)

摘要: Titanium dioxide (TiO2) sensing electrode and a silver/silver chloride (Ag/AgCl) reference electrode were deposited on an indium tin oxide (ITO) substrate and used as an integrated all-solid electrode (IASE) for pH sensing applications. pH sensing applications have attracted a lot of interest because they can be used in many different areas, such as monitoring the environment, aquaculture, agriculture, food inspection technology, and biomedical applications. TiO2 and Ag/AgCl thin films were fabricated using the sol-gel spin coating method and a thermal evaporator. After the deposition process, the thin films were dried at room temperature, 50 oC, and 100 oC to study the influence of the drying process on the pH sensitivity and linearity of IASE. It was found that the sample dried at 100 oC showed high sensitivity and linearity with 67 mV/pH and 0.9827.