Photochemical synthesis of Prussian blue film and its application for H2O2 sensor

• Main Authors: Chia-hsiang Peng, 彭嘉祥
• Other Authors: Chung-chieh Chang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/22294148333633536335

碩士 === 逢甲大學 === 化學工程學所 === 95 === In this study, we use photochemical reduction method to deposited the Prussian blue (PB) film on substrates under UV-C (365nm) light from the solution containing de-ionized water, potassium feericyanide and iron(III) chloride. The indium tin oxide (ITO) glass and stainless steel were used as the substrates. The prepared PB films on substrates were shown to be able to be used as a chemical sensor of hydrogen peroxide(H2O2). The results of the deposited ITO glass electrode show a good linear dependence of response current on the H2O2 concentration in a range from 0 to 1 mM with a detection sensitivity of 1.04 μA/cm2-mM and the response time is 49 seconds under +0.6 V. The repetition error is about 8.5 %. The results of the same device operated under -0.3 V also show a good linear dependence in the H2O2 concentration range from 0 to 0.1 mM with a detection sensitivity of 13.56 μA/cm2-mM and the response time is 40 seconds. The repetition error about is 9.8%. Comparatively the results of the PB film on stainless steel electrode show a good linear dependence of response current on the H2O2 concentration in a range from 0 to 1 mM with a detection sensitivity of 1.35 μA/cm2-mM and the response time is 20 seconds under +0.6 V. The repetition error is about 9.5%. The results of the same device operated under -0.3 V also show a good linear dependence in the H2O2 concentration range from 0 to 0.5 mM with a detection sensitivity of 0.37 μA/cm2-mM and the response time is 45 seconds. The repetition error error is about 6%. In dynamic operation the PB film deposited ITO glass electrode show a linear dependence in the H2O2 concentration in a range from 0 to 0.1 mM with a detection sensitivity of 13.56 μA/cm2-mM and the response time is 20 seconds. The repetition error is about 10.75%.