摘要
在2,4-二氯苯酚(2,4-DCP)存在下,在金电极表面自组装邻氨基苯硫酚(oATP)并电聚合oATP/金纳米粒子,制得2,4-DCP印迹复合膜电化学传感器.采用循环伏安法和交流阻抗技术对传感器制备过程进行了表征,以K3Fe(CN)6为探针,间接对2,4-DCP进行定量分析.结果表明,2,4-DCP在5.0×10-8～1.2×10-4mol/L浓度范围内与K3Fe(CN)6示差脉冲伏安曲线的峰电流呈线性关系(R2=0.9964),检出限为1.5×10-8mol/L(S/N=3).该印迹传感器可在几种氯代酚干扰下选择性测定2,4-DCP.利用该传感器对环境水样进行加标回收检测,回收率为95.2%～109.3%.
A novel molecularly imprinted electrochemical sensor for 2,4-dichlorophenol（2,4-DCP） detection was fabricated on the surface of gold electrode by self-assembly of o-aminothiophenol（oATP） and electropoly- merization of oATP/Au nanoparticles in the presence of template molecule. The modification procedure was characterized via cyclic vohammetry and electrochemical impedance spectroscopy. In the presence of K3 Fe （CN）6 as redox probe, the peak current of K3 Fe （CN）6 decreased linearly with the increasing concentra- tion of 2,4-DCP from 5.0 x 10-8 to 1.2 x 10-4 mol/L （ Re = 0. 9964 ） with a detect limit of 1.5 x 10-8 mol/L （ S/N = 3）. Three chlorophenols possesing analogous structures, including 2,6-DCP, 2,4,6-trichlorophenol （2,4,6-TCP） and pentachlorophenol（PCP） were chosen to examine the specific recognition ability of the imprinted sensor. The results showed that MIP electrode had the highest current response toward 2,4-DCP. In addition, the feasibility of its practical applications has been demonstrated in the analysis of four water samples with the recoveries ranged from 95.2% to 109.3%.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第10期2296-2302,共7页
Chemical Journal of Chinese Universities
基金
贵州省科学技术基金(批准号:J20102120)
贵州省教育厅自然科学基金(批准号:2010054)资助
关键词
2
4-二氯苯酚
分子印迹电化学传感器
金纳米粒子复合物
聚邻氨基苯硫酚
自组装
电聚合
2,4-Dichlorophenol
Molecularly imprinted electrochemical sensor
Au nanoparticle
Poly-o-ami-nothiophenol
Self-assembly
Electrochemical polymerization
