Effect of the Composition of Sol-gel Coating Solution on Responses of Hydrogen Peroxide

The sol-gel process is an extensively used method to prepare the various coating and films because it has a many advantages according to other film formation methods, such as low temperature processing, easy coating of large surfaces, good adhesion ability to surface of film or coating, homogeneous oxide film formation, and adjustment of film composition and porosity. Solgel thick films are not appropriate for the sensor applications because they may block the diffusion of electro-active analyte through the film. Homogeneous and thin films can be prepared using sols diluted with alcohol. The diffusion of analyte through thin films, which have more porous structure, is faster and therefore, the response time of sensor is shorter. The film porosity can be adjusted by changing the composition of sol-gel coating solution. In this study, effect of the composition of sol-gel coating solution prepared using GLYMO and TEOS on responses of hydrogen peroxide sensor has been investigated. It was determined that the composition of solution had an important effect on the responses of hydrogen peroxide sensor