Fabrication And Applicaiton Of Nanometer Materials Modiifed Electrodes In P-aminobenzene Sulfonic Acid Package

Recently, poly(p-aminobenzene sulfonic acid) modified electrodeshave been reported for the electrochemical study of several compounds.In this work, several different kinds of nanoparticles were synthesizedwith hydrothermal method and then were introduced on the electrodecombined with poly(p-aminobenzene sulfonic acid) to form differentsensors. The main details are summarized as follows.1. First of all, we reviewed the significance of biological moleculedetection, the preparation and application of polymer nanomaterials aswell as the prospects for development. Finally we put forward the thesisidea.2.TiO2-graphene/nafion combined with poly(p-ABSA) werefabricated onto the glassy carbon electrode (GCE) to form thepoly(p-ABSA)/TiO2-GR/nafion for the simultaneous detection of guanine(G), adenine (A) and epinephrine (EP).The p-ABSA/TiO2-GR/nafioncomposite film can significantly enhance the oxidation peak current anddecrease the oxidation potential. The peak-to-peak separation of guanine,adenine and epinephrine obtained at the fabricated electrode was a littlelarger than those at some other electrodes.The linear calibration range is0.10-52.60μM for G,0.15-52.60μM for A and0.14-132.09μM for EP,respectively, with the detection limits of0.03μM for G,0.05μM for Aand0.04μM for EP (S/N=3). the sensor shows good stability,reproducibility, anti-interference.3.The flowerlike ZnO were prepared by hydrothermal synthesismethod using PVP as surfactant and characterized using Scanningelectron microscopy (SEM) and X-ray diffraction (XRD). Thepoly(p-ABSA)/ZnO modified electrode was constructed for the first timeand used for the research of the electrochemical behaviors of PHZ.Remarkable enhancement effects on the oxidation peak currents wereobserved with the negative shift of the oxidation peak potentials. Underoptimal conditions, the linear concentration range of PHZ obtained atp-ABSA/ZnO composite film using DPV technique was0.01μM to59.84μM (R=0.997) and the detection limit was0.004μM at S/N=3.The probable oxidation mechanisms for promethazine on the preparedsensor was also discussed.4.The lamellar structure CuO nanoparticles was synthetized byhydrothermal method and characterrized by SEM and XRD. Then theresulting material was immobilized on the surface of a glassy carbonelectrode modified with a film of poly(p-aminobenzene sulfonic acid).The electrochemical behavior of acetaminophen on p-ABSA/CuO wasexplored. The prepared modified electrode showed a goodelectrocatalytic activity toward oxidation of acetaminophen, with a linear range from0.1μM to134μM (R=0.989) and a detection limit of0.03μM（S/N=3）.