The Preparation Of Carbon Nanotubes And TiO₂Nanoparticals Films And Carbon Nanotube Films In The Application Of Electrochemical Analysis

This paper explores the surface morphology of Carbon nanotubes and TiO2nanoparticles films which were influenced by electrolyte concentration, concentration of carbon nanotubes and nano titanium dioxide, electrophoretic deposition voltage, electrophoretic deposition time, respectively. Carbon nanotubes and TiO2nanoparticles composite coating was prepared by using sequential EPD and electrophoretic co-deposition. A new voltammetric sensor for the detection of ethylmaltol was developed, based on the CNT/ITO electrode which was prepared by EPD. Results are as follows:(1) when the electrolyte concentration is0.090g/L, carbon nanotubes concentration is0.104g/L, electrophoretic deposition voltage is90V, electrophoretic deposition time of120s, the carbon nanotubes films quality is better. When the electrolyte concentration is0.204g/L, TiO2nanoparticles concentration is20.1g/L, electrophoretic deposition voltage110V, electrophoretic deposition time of120s, TiO2nanoparticles films quality is better. When carbon nanotubes and TiO2nanoparticles composite films were prepared by sequential EPD, the film interface of the composite films which carbon nanotubes have been the first deposited is more obvious than the films which TiO2nanoparticles have been the first deposited. When carbon nanotubes and TiO2nanoparticles composite films were prepared by electrophoretic co-deposition, the coatings for the volume ratio of1:4,1:2exhibit a homogenous distribution and throughout the whole thickness with a high amount of porosity. The coatings for the volume ratio of10:1,1:1the coatings seemed to be very dense and have excessive surfactant incorporated.(2) A new voltammetric sensor has been prepared and used for the detection of ethylmalto, with high sensitivity and selectivity as well as a preferable linear relationship in the range of2.0x10-6to8.0x10-5mol/L with the peak current value.