摘要
针对传统碳纤维电极易受电容容抗效应影响而无法响应低频信号的问题,采用浓硝酸氧化+硅溶胶涂覆的改性方法,制备了一种新型的碳纤维海洋电场电极。实验结果证明,改性后碳纤维表面引入了大量氮氧官能团,使得电极比表面积和亲水性得到大大提高,同时电极受容抗效应的影响减小。在电场响应性能方面,改性后电极能够正确响应低至1 mHz的低频信号,相较于改性前,响应的准确性和灵敏度也得到大大提高,改性后电极对10和1 mHz信号响应的线性度分别为3.3%、2.1%,灵敏度分别为0.0482,0.0503。
Aiming at the problem that traditional carbon fiber electric field electrode is subject to the capacitive reactance effect and cannot response to low frequency signals,in this paper,a new type of carbon fiber marine electric field electrode is prepared using the modification method of concentrated nitric acid oxidation and silica sol coating.The experiment results show that large number of nitrogen-oxygen functional groups are introduced to the modified carbon fiber surface,which not only increases the specific surface area and hydrophilicity of the electrode,but also reduces the effect of the capacitive reactance effect.In terms of electric field response performance,the modified electrodes can correctly respond to the LF signal with frequency as low as 1mHz.Compared with the results before modification,the response accuracy and sensitivity are improved greatly,the linearities of the modified electrodes responding to frequency of 10 mHz and 1 mHz are 3.3% and 2.1%,and the sensitivities are 0.0482 and 0.0503,respectively.
作者
王泽臣
林君
辛青
臧月
Wang Zechen;Lin Jun;Xin Qing;Zang Yue(School of Electronics and Information,Hangzhou Dianzi University,Hangzhou 310037,China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2019年第9期52-60,共9页
Chinese Journal of Scientific Instrument
基金
浙江省自然科学基金(LQ16B070001,LY17B060012)项目资助
关键词
碳纤维电极
表面改性
硅溶胶
电化学性能
电场响应性能
carbon fiber electrode
surface modification
silica sol
electrochemical property
electric field response performance
