摘要
在0.01mol.L-1硼砂溶液(pH 9.18)中,用纳米二氧化铈修饰碳糊电极作为工作电极,线性扫描伏安法测定苯酚。伏安图上出现一灵敏的氧化峰,其峰电位为+0.56V(vs.SCE),峰电流与苯酚的浓度在1.0×10-7～2.0×10-4 mol.L-1范围内呈线性关系,检出限(3s/k)为5.0×10-8 mol.L-1。富集时间为30s,同时采用线性扫描伏安法研究苯酚在纳米二氧化铈修饰碳糊电极上的氧化还原反应,结果表明此电极反应为一不可逆的吸附过程。
Phenol was determined by linear sweeping voltammetry in 0.01 mol·L-1 sodium borate solution of pH 9.18,using CeO2 nanoparticles modified carbon paste electrode as working electrode.A sensitive oxidation peak of phenol was observed in the voltammogram at the peak potential of ＋ 0.56 V（vs.SCE）.Linear relationship between values of peak current and concentration of phenol was kept in the range of 1.0×10-7-2.0×10-4mol·L-1 with detection limit（3s/k） of 5×10-8mol·L-1.As shown by the results of cyclic voltammetric study of electrochemical behavior of phenol,the redox electrode reaction at the modified electrode was proved to be an irreversible adsorption process.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2012年第3期265-268,271,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
陕西省自然科学基金项目(2010JQ2005)
延安大学专项科研基金资助项目(YD-2007-7)
关键词
线性扫描伏安法
纳米二氧化铈
苯酚
碳糊电极
Linear sweeping voltammetry
CeO2 nanoparticles
Phenol
Carbon paste electrode
