Preparation of Poly-(p-aminobenzoic acid)/Multiwall Carbon Nanotubes Composite Film Modified Glassy Carbon Electrode and Application to Detect Catechol and Hydroquinone Simultaneously

Abstract

The electrochemical reaction of catechol (CC) and hydroquinone (HQ) was investigated at poly-(p-aminobenzoic acid) (p-ABA)/multiwall carbon nanotubes (MWCNTs) composite film modified glassy carbon (GC) electrode via cyclic voltammetry (CV). Separation of the peak potentials for CC and HQ was about 105 mV in 0.1 mol/L H 2 SO 4 , which makes it suitable for simultaneous determination of these compounds. Under optimized conditions, the oxidation current of CC and HQ have been enhanced linearly with the concentration in the range of 1 × 10−3 mol/L (r = 0.9979) and 1 × 10-1 × 10 −3 mol/L (r = 0.9948), with the detection limit of CC and HQ 4 × 10 −6 and 2.7 × 10 −6 mol/L, respectively. The proposed method has been applied to determine CC and HQ simultaneously with good results, which shows excellent stability and reproducibility.

Electrodeposition of monodispersed Cu nanoparticles on poly-p-aminobenzene sulfonic acid functionalized glassy carbon electrode and the electrocatalytic reduction toward H2O2

“…: +86 571 88273637; fax: +86 571 88273637 E-mail address: XLL98731@zju.edu.cn (L. Xi). 8 negative potential scan [29][30]. Dimer is more easily oxidizable than the monomer ABSA, so a less positive shift of its oxidation potential was observed.…”

“…Recently, poly-aminobenzene sulfonic acid (poly-ABSA) has been an extensively studied organic conducting polymer, due to its high polymerization yield, high conductivity and good preparation reproducibility [29]. It has been used in many practical applications such as electrocatalysis and electrochemical sensors [30]. But it has not been used as an ion-exchange and coordination matrix to fabricate Cu-NPs electrochemical sensors so far.…”