pH Sensors Using 3d-Block Metal Oxide-Coated Stainless Steel Electrodes
pH Sensors Using 3d-Block Metal Oxide-Coated Stainless Steel Electrodes
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DOI：
10.1016/j.electacta.2016.10.166
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发表时间：
2016-12-01
影响因子：
6.6
通讯作者：
Nishio, Yuji
中科院分区：
文献类型：
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作者：
Hashimoto, Tadanori;Miwa, Mariko;Nishio, Yuji
为了开发新型pH传感器，采用溶胶-凝胶浸渍-涂敷法制备了三维块体金属氧化物涂层SUS 304电极（MOx/SUS，M = Sc，Ti，V，Cr，Mn，Fe，Co，Ni，Cu和Zn）。MOx/SUS电极显示出88- 100%的pH灵敏度、0.1-0.6的pH重复性（以pH单位计）和约1秒的初始pH响应时间。SUS（原样）和SUS-500（在500 ℃加热）的pH灵敏度分别为91%和94%。因此，似乎MOx/SUS电极的pH敏感性受到底层材料（SUS基底及其氧化物层）以及外部MOx膜的影响。所有的MOx/SUS电极显示出比商业玻璃电极（14秒）短得多的初始pH响应时间。特别是，Co 3 O 4/SUS和CuO/SUS电极被认为是一次性pH电极，pH微电极和新型pH传感器的管和针型pH电极的候选人，由于其良好的pH灵敏度，pH重复性和初始pH响应时间。(C)2016作者爱思唯尔有限公司出版
The 3d-block metal oxide-coated SUS304 electrodes (MOx/SUS, M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu and Zn) were prepared using the sol-gel dip-coating method in order to develop novel pH sensors. MOx/SUS electrodes showed a pH sensitivity of 88-100%, a pH repeatability of 0.1-0.6 in pH units and an initial pH response time of approximately 1 sec. The pH sensitivities of the SUS (as-received) and SUS-500 (heated at 500 degrees C) were 91% and 94%, respectively. Therefore, it appeared that the pH sensitivity of the MOx/SUS electrode was affected by the underlying materials (SUS substrate and its oxide layer) as well as by the outer MOx films. All of the MOx/SUS electrodes showed much shorter initial pH response time than a commercial glass electrode (14sec). In particular, Co3O4/SUS and CuO/SUS electrodes were considered candidates for disposable pH electrodes, pH microelectrodes and tube and needle-type pH electrodes for novel pH sensors as a result of their favorable pH sensitivity, pH repeatability and initial pH response time. (C) 2016 The Authors. Published by Elsevier Ltd.