【摘要】 将不锈钢衬底进行适当的预处理,采用等离子体增强化学气相沉积(PECVD)的方法,在适当的工艺条件下,利用甲烷与氢气的混和气体,在不锈钢衬底上生长出多壁碳纳米管(MWCNT).将生长有碳纳米管(CNT)的不锈钢片作为基体电极,通过共价修饰法,制备出壳聚糖(CS)与碳纳米管复合膜的化学修饰电极,用来检测亚硝酸盐.对NO2-在电极表面的阳极溶出伏安特性进行研究,结果表明:使用CS/CNT修饰电极检测亚硝酸盐,在0.1 mol/L,pH=6.0的KCl底液中,对NO2-具有良好的选择性与吸附性,峰电流与NO2-的浓度在2.0×10-6~1.0×10-3mol/L范围内呈良好的线性关系,检测限可达3.0×10-7mol/L,具有很好的应用前景.更多还原

【Abstract】 In this experiment,suitable pretreatment was required for stainless steel substrates.With a proper reaction condition,multiwalled carbon nanotubes(MCNT) were grown from methane and hydrogen gas mixture directly on stainless steel substrates by plasma enhanced chemical vapor deposition(PECVD).Stainless steel substrates with carbon nanotubes(CNT) are acted as basic electrode.And a chitosan(CS) / carbon nanotube chemically modified electrode which is used to detect nitrite is fabricated by covalent modification.Anodic voltammetry characteristic of NO-2 on this electrode surface has been studied.The result is shown to be that the CS/CNT chemically modified electrode,which is used to detect nitrite,has better selectivity and adsorptivity in the 0.1 mo1/L,pH=6.0 base solution of KCl.A good linear relation between peak current and concentration emerges in the range of 2.0×10-6~1.0×10-3 mol/L,and its detecting limit is 3.0×10-7 mol/L,so this electrode has an excellent application prospect.更多还原