CAJ | 학술논문

采用界面法合成聚苯胺纳米纤维,并利用SEM、TEM、FTIR、XRD表征聚苯胺的表面形貌和结构。将合成出的聚苯胺纳米纤维滴涂在玻碳电极表面制备聚苯胺修饰电极,采用循环伏安法研究对苯二酚在聚苯胺修饰电极上的电化学行为。结果表明,与裸电极相比,对苯二酚在修饰电极上的氧化还原峰电流均增大,峰电位差驻Ep减小了115mV,对苯二酚电化学可逆性得到明显改善,说明修饰电极对对苯二酚的氧化过程有明显的电催化效果。且当对苯二酚在1.0×10-7-1.0×10-3mol/L浓度范围内,其氧化峰电流与浓度之间呈良好线性关系,其相关系数是0.9988,检出限为6×10-8mol/L。
채용계면법합성취분알납미섬유,병이용SEM、TEM、FTIR、XRD표정취분알적표면형모화결구。장합성출적취분알납미섬유적도재파탄전겁표면제비취분알수식전겁,채용순배복안법연구대분이분재취분알수식전겁상적전화학행위。결과표명,여라전겁상비,대분이분재수식전겁상적양화환원봉전류균증대,봉전위차주Ep감소료115mV,대분이분전화학가역성득도명현개선,설명수식전겁대대분이분적양화과정유명현적전최화효과。차당대분이분재1.0×10-7-1.0×10-3mol/L농도범위내,기양화봉전류여농도지간정량호선성관계,기상관계수시0.9988,검출한위6×10-8mol/L。
Polyaniline nanofibers are prepared by interfacial polymerization, and the molecular structure and interface morphology of polyaniline are determined by FTIR, XRD, SEM and TEM. The electrochemical behavior of hydroquinone at the polyaniline modified electrode is studied with cyclic voltammetric method. The results show that the peak separation potential (△Ep) is decreased by 165 mV with the redox peak currents increasing significantly. It is concluded that the reversibility of hydroquinone improves greatly and polyaniline modified electrode holds remarkable electrocatalytic activity toward hydroquinone. The oxidation peak current is well- proportional to the concentration of hydroquinone over the range from 1.0×10-7-1.0× 10-3mol/L by cyclic voltammetry with the correlation coefficient of 0.9988. The detection limit of hydro-quinone is estimated to be 6.0×10-8 mol/L.