【作者】 姚素薇； 郭萌； 张自强； 张卫国；

【Author】 Suwei Yao,Meng Guo,Ziqiang Zhang,Weiguo Zhang (SUGIYAMA Laboratory of Surface Technology,School of Chemical Engineering and Technology, Tianjin University,Tianjin 300072,China)

【机构】 天津大学化工学院杉山表面技术研究室；

【摘要】 本文通过直流电沉积的方法,在阳极获得可应用于新型pH传感器的纳米二氧化锰敏感材料,并对不同电沉积条件下制备的电解二氧化锰(EMD)形貌进行了表征,测试了它们的pH响应性能。实验结果表明:在低电流条件下,得到底边长为20～150纳米、高为0.2～2.0微米的斜棱柱状的EMD纳米线,由这种材料制备的电极具有较高pH线性响应灵敏度(能斯特斜率约为75mV/pH);而随着沉积电流的增大,EMD的形貌逐渐变化成为球状颗粒,其pH响应的灵敏度也随之发生了明显的下降。本文还对电解二氧化锰的pH响应机理进行了讨论。更多还原

【Abstract】 In this paper,nano- MnO₂ sensitive material for new- type pH sensors was prepared using anodic DC electrodeposition under various conditions,and its morphology and pH response were characterized.Testing results indicated that prism-like MnO₂ nanowire which has high sensitivity in pH response（Nerstian slope was 75mV/pH） were obtained with lower current density of electrodeposition;and as current density increased,the morphology of EMD turned into spherical particles gradually and the pH - response sensitivity decreased.A mechanism for the pH - response of EMD was also discussed here.更多还原