多壁碳纳米管离子液体[BMIM]PF_6修饰碳糊电极的制备与表征

Preparation and Characteristics of Multi-walled Carbon Nanotube and Ionic Liquid [BMIM]PF_6 Modified Carbon Paste Electrode

将多壁碳纳米管(MWCNTs)、石墨粉和离子液体1-丁基-3-甲基咪唑六氟磷酸盐相混合制备了新型的碳纳米管离子液体修饰碳糊电极(CNILE),优化了制备的条件,当石墨粉和MWCNTs的比例为10∶1时电极的响应电流最大,采用扫描电子显微镜对电极的表面形貌进行了表征,结果表明MWCNTs已被均匀混合在电极之中。采用循环伏安法考察了峰电流与扫速(υ)的关系,结果表明铁氰化钾在该电极上的电化学行为表现为扩散控制过程,计算了电极的有效面积为0.3439cm2。CNILE对抗坏血酸的直接电化学氧化表现出较好的电催化行为。

Multi-walled carbon nanotube（MWCNT） and ionic liquid 1-butyl-3-methyl-imidazolium hexofluorophosphate（PF6） was mixed with carbon powder together to fabricate a new kind of modified electrode（CNILE）.When the ratio of MWCNT and graphite powder was selected as 10：1,the biggest electrochemical response was got.The SEM image of the prepared electrode was recorded,which indicated that MWCNTs had been mixed homogeneously in the carbon paste.The electrochemical behaviors of K3[Fe（CN）6] solution on the CNILE was investigated by cyclic voltammetry,which exhibited a diffusion-controlled process.With the effective electrode surface calculated as 0.3439 cm2.The CNILE showed excellent electrocatalytic ability of the oxidation of ascorbic acid after investigation.