臺灣大學: 化學工程學研究所廖英志林育平Lin, Yu-PingYu-PingLin2013-03-272018-06-282013-03-272018-06-282012http://ntur.lib.ntu.edu.tw//handle/246246/252157本研究藉由噴墨技術來沈積普魯士藍於碳膠電極表面，由於普魯士藍層會受到溶液中氫氧根離子破壞，因而侷限了以普魯士藍製成之過氧化氫感測器的應用，為了提高普魯士藍穩定度而得到穩定度高且感測能力佳的過氧化氫感測器，以將其與氧化酶結合應用於微電極系統並製作成複合感測器，本研究先利用不同沈積方法於碳膠電極上沈積不同量之保護物質瞭解保護物質的保護機制，從此結果來得到噴墨墨水的配製概念，以便在未來能利用於噴墨製程上且更加簡單地製作出穩定度高且感測能力佳的過氧化氫感測器。 藉由噴墨技術來沈積醋酸纖維素和蠟等保護性物質於普魯士藍修飾電極表面，以瞭解對提升普魯士藍在中性到弱鹼性環境中的穩定性，操作環境為pH 7.4時，於普魯士藍修飾電極上噴塗石蠟10次並加熱之後，第20圈的還原峰電流值沒有明顯的下降，而其對過氧化氫感測的線性範圍在2.65–8.46 mM，靈敏度為0.826 mA/M/cm2，而過氧化氫最小偵測濃度為0.62 mM；而在普魯士藍修飾電極上醋酸纖維素噴塗5次之後，同樣的操作環境下，第20圈的還原峰電流值下降了4.4 %，對過氧化氫感測的線性範圍在0.15–2.61 mM，靈敏度為2.56 mA/M/cm2，而過氧化氫濃度感測極限為0.1 mM。 在本研究中發現保護性物質要有效的提升普魯士藍穩定性，須讓石蠟和醋酸纖維素完全包覆普魯士藍顆粒。在提高墨水中酸化碳黑的比例時，會讓電極的電容增加；提高蠟與醋酸纖維素的比例時，會增加質傳阻力。因此墨水中蠟或醋酸纖維素與普魯士藍的比例約為1: 1，就能得到不錯的穩定效果且不會有太大的質傳阻力，而普魯士藍與酸化碳黑的比例為1: 0.5到1: 1就能夠幫助提升普魯士藍的穩定性。In this study, Prussian blue was deposited on carbon paste electrode by inkjet printing technique. But Prussian blue has very low stability with neutral and alkaline pH. Therefore, the result will confine the development of hydrogen peroxide sensors based on Prussian blue. In order to improve stability of Prussian blue for fabrication of hydrogen peroxide sensors that have high stability and well performance, and then the hydrogen peroxide sensors can apply in microelectrode system and combine with different oxidases to get a multicomponent-sensing device. Therefore, different amount of protective materials were deposited onto the Prussian blue modified electrode through inkjet process. Then, the electrodes were investigated to understand the protective mechanisms of protective materials. The preparation of inks applied for inkjet process will base on the mechanisms for fabricating hydrogen peroxide sensors that have high stability and well performance more simply. Protective materials, such as cellulose acetate and paraffin wax, were deposited on Prussian modified electrode by inkjet printing technique. And the stability of Prussian blue operated at pH 7.4 was investigated. After 10 times paraffin wax deposition onto Prussian blue modified electrode and then heating process, the peak current of the twentieth cycle had no obvious decrease. And for hydrogen peroxide detection, the electrode had sensitivity of 0.826 mA/M/cm2, detection limit of 0.62 mM and linear range between 2.65 to 8.46 mM. And under the same operation condition, Prussian blue modified electrode with 5 times cellulose acetate deposition had sensitivity of 2.56 mA/M/cm2, detection limit of 0.1 mM and linear range between 0.15 to 2.61 mM. The peak current of the twentieth cycle had declined by 4.4 percent. It was found that the stability of Prussian blue particles, which were entirely coated with paraffin wax or cellulose acetate, had enhanced sufficiently. When the ratio of oxidized carbon black in the deposited layer increased, the capacitance of the electrode had also increased. When the proportion of wax or cellulose acetate in the deposited layer increased, the mass transfer resistance of ions through the layer had also increased. The results show the optimum ratio of Prussian blue to protective materials is 1 to 1, and the ratio of oxidized carbon black to Prussian blue is better in 0.5: 1 to 1: 1140 bytestext/htmlen-US噴墨製程感測器穩定性提升普魯士藍過氧化氫Inkjet processSensorsStability improvementPrussian blueHydrogen peroxidethesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/252157/1/index.html