Electrochemical Behavior Of Alkylphenols On The Chemically Modified Carbon Based Electrode

Alkylphenols (APs), a kind of estrogenic activity chemical contaminants (EDCs), possesses the ability to interfere with estrogen and the normal endocrine system, even toxic to the cells of mammals, resulting in adverse health and reproduction in humans and wildlife. Therefore, it is essential to exploit effective, rapid and accurate approach for APs monitoring in environment sample. In this work, we mainly study the electrochemical behavior of APs on the chemically modified carbon based electrode (CME). The primary research were consist of six aspects as follows:Introduction:A detailed outlines and reviews mainly on the properties and hazardous of APs, the research status and development analysis method for APs detection, the preparation, characterization, application as well as development of chemically modified carbon based electrodes (CME). And then we also introduced some important modified material applied in CME. Finally, we highlight the purpose, significance and main contents of this dissertation.Chapter1:A electrochemical sensor based on immobilized multiwalled carbon nanotubes and1-butyl-3-methyl-imidazolium hexafluorophosphate on glassy carbon electrode (GCE) for o-sec-butylphenol (osBP) was proposed. The electro-oxidation behavior of osBP was studied, the experimental conditions were optimized and kinetic parameters were calculated. The presumable electrochemical oxidation mechanism of osBP at MWCNTs-BMIM PF6/GCE was also expressed. Under the optimized experimental conditions, osBP was determined by linear sweep stripping voltammetry.Chapter2:A graphite/poly(methyl methacrylate) composite electrode (PMMA/CPE) with high mechanical strength was fabricated and firstly applied to the determination of osBP. Factors influencing the electrocatalytic activity of the electrode and the detection processes of osBP were optimized, and kinetic parameters were calculated. Under the optimal conditions, the sensitive amperometric current-time method was constructed to determine osBP in greengrocery samples.Chapter3:In this part, nanowires Cu(OH)2was synthesized vis a coordination homogeneous precipitation method and a novel CPE based on the composite modification by nanowires Cu(OH)2and acetylene black (AB) was constructed successfully for the determination of4-n-nonylphenol (NP). The assay performances about NP were evaluated and the possible oxidation reaction mechanism of NP was studied. After optimizing the conditions, the sensitive differential pulse voltammetry (DPV) was established to monitoring the content of NP in the water and soil samples.Chapter4:In this part, a1-octylpyridinium hexafluorophosphate ([OPy]PF6)/graphite composite electrode (CILE) was fabricated with high electrochemical performance and used as the voltammetric sensor for the sensitive determination of4-tert-octylphenol (OP). The electrochemical process and parameters of OP on the electrode was studied, and the experimental conditions were also optimized. Trace OP in the plastic samples was quantitative analyzed by the rapid and sensitive DPV method.Chapter5:Electrochemical method of OP at a polyvinylpyrrolidone/Triton X-100/kaolin composite modified carbon paste electrode (PVP/TX-100/KPCE) was described significantly. Several important corresponding electrochemical parameters of OP oxidation at PVP/TX100/KCPE were measured. After optimizing the experimental conditions, an ease and sensitive amperometric current-time method was developed for OP determination.