Sol-jel Kaplama Çözeltisi Bileşiminin Hidrojen Peroksit Yanıtlarına Etkisi

Yıl 2012, Cilt: 2 Sayı: 2, 18 - 23, 01.06.2012

Nizamettin Demirkıran Ergun Ekinci

Öz

Sol-jel prosesi diğer film yapım metotlarına göre düşük sıcaklıkta işlenmesi, büyük yüzeylerin kolayca kaplanması, film veya kaplamanın yüzeye iyi yapışabilmesi, homojen oksit film oluşması, filmin bileşim ve gözenekliliğinin ayarlanabilmesi gibi birçok avantaja sahip olduğu için yaygın olarak kullanılan bir metottur. Sol-jel kalın filmler elektro-aktif türün difüzyonunu engelleyebileceği için sensör uygulamaları için uygun değildir. Homojen ve ince filmler alkolle seyreltilmiş soller kullanılarak hazırlanabilir. Daha gözenekli bir yapıya sahip olan ince filmlerden analitin difüzyonu daha hızlıdır ve böylece sensörün cevap süresi daha kısa olur. Film gözenekliliği sol-jel kaplama çözeltilerinin bileşiminin değiştirilmesiyle ayarlanabilir. Bu çalışmada, GLYMO ve TEOS kullanılarak hazırlanan sol-jel kaplama çözeltisinin bileşiminin hidrojen peroksit sensörün yanıtlarına etkisi incelenmiştir. Çözelti bileşiminin hidrojen peroksit sensörün yanıtları üzerine önemli bir etkiye sahip olduğu belirlenmiştir

Anahtar Kelimeler

Sol-jel, Elektrot modifikasyonu, Seçimli geçirgen membran, Hidrojen peroksit

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

Öz

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

Anahtar Kelimeler

Sol-jel, Elektrot modifikasyonu, Seçimli geçirgen membran, Hidrojen peroksit

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