Carbon Nanotubes And Metal Oxide Compound And No Gas Sensitivity Study

In this paper, Cu(CuO)/Single wall carbon nanotubes(SWCNTs), Ni(NiO)/Single wall carbon nanotubes(SWCNTs) composites were synthesized by electrodeposition method at room temperature. The as-produced composites were characterized by UV-vis-NIR, Raman, SEM and TEM for the study of their content and morphology.The results of Raman, SEM and TEM showed that in the electrodeposition most of metal(metal oxide)/semiconducting SWCNTs was deposited onto the cathode, and most of the metal(metal oxide)/metallic SWCNTs remained in the electrolyte. So the semiconducting and metallic SWCNTs were separated to a certain extent, and at the same time the semiconducting SWCNTs composite material was produced.It was investigated that the metal and metal oxide particles contacting with SWCNTs in two ways:One was through which metal oxide particles were uniformly located on the outside of the thin SWCNTs bundles; the other way was through which metal oxide particles were wrapped into the interspace of the SWCNTs bundles.In the electrodeposition process, other types of CNTs such as MWCNTs, functionalized CNTs were attempted. All the above composites were tested in the NO atmosphere for the study of their gas-sensor determinating characteristics. And the results showed that the above composites behaved well in the gas-determinating tests, they were suitable for the application in the electrical gas sensor instruments for NOx with high sensitivity and short response time.