A poly(3,4-ethylenedioxythiophene)-poly(styrene sulphonate) composite electrode coating in the electrooxidation of phenol

Determination of Phenol and Chlorophenols at Single-Wall Carbon Nanotubes/Poly(3,4-ethylenedioxythiophene) Modified Glassy Carbon Electrode Using Flow Injection Amperometry

“…Due to the electrocatalytic effect of the polymer, the shape and the response current are different from those of the bare GCE. The oxidation peak of phenol increased markedly with successive runs at the PEDOT/GCE and the response becomes reproducible after the tenth potential cycle as reported earlier [36]. It can be seen that the use of PEDOT coated GCE sensor also can overcome the problem of passivation.…”

Modified glassy carbon electrode with Nafion/MWNTs as a sensitive voltammetric sensor for the determination of paeonol in pharmaceutical and biological samples

“…Summing up all the above experimental results, a possible oxidation mechanism of paeonol could be expressed in Scheme 2. According to the literature [27], the cathodic peak response can be attributed to the reduction of quinone compounds, i.e., of a side product in the proposed mechanism leading to the polymer, and the smaller anodic peak appeared, maybe, is ascribed to the oxidation of the resultant products of the reductive quinone compounds. A comparison with cyclic voltammograms of an authentic phenol sample was recorded under the same conditions.…”

“…However, the scan rate of 100 mV s -1 which had higher current signal, lower peak potential and smaller background current was selected as the optimum value for the study of paeonol. The overall oxidation reaction mechanism with multielectron-proton transfer step and complicated polymerization could be speculated based on the report [27]. Paeonol anion gives rise to phenoxy radical during the first step of oxidation.…”

Enzyme based phenol biosensors

“…The design of a support matrix that binds the enzyme and bare electrode can be target specific providing efficient electron transport via added functional groups or nanoparticles into the composite structure of the electrode. Conducting polymers as supporting matrix are usually used as copolymers or composite films in biosensor systems since mechanical and processing properties of their homopolymers are weak (Tsai & Chui, 2007;Heras et al, 2005;Carvalho et al, 2007;Serra et al, 2001;Mailley et al, 2003). Copolymerization does not require rigorous experimental conditions, and can be employed for the polymerization of a large variety of monomers leading to the formation of new advantageous materials (Böyükbayram et al, 2006;Kuwahara et al, 2005;Yilmaz et al, 2004;Yilmaz et al, 2005).…”