The Study On Capacitive Deionization With Carbon Nanotube Film Electrodes And Carbon Nanotubes Loading Ferric Oxide

Carbon Nanotubes(CNTs) have the character of optimum pore size, high surface area and low electrical resistivity. As a typical representative of nanomaterial, they have drawn widespread application in the filed of hydrogen storage, quantum nanowires, catalyst supports and energy storges (eg. supercapacitor), etc. In recent years, with their preparation in batches the power point of their investigation has changed from studying only in the lab to some pratical application areas. This paper mainly has twoparts on CNTs application studies as follows:1. Preparation and Mechanism of Carbon Nanotube loaded Ferric OxideTwo different pre-treated carbon nanotubes were marinated in the Fe(NO₃)₃ solutionfor a long time and filtered,Pre-treated carbon nanotubes absorbed by Fe(NO₃)₃ were annealed, and then the composite catalysts of carbon nanotube loaded by ferric oxide was directly gained. The images of composite catalysts were observed through TEM,the analyses of XRD showed that ferric oxide wrapping on carbon nanotubes was α -Fe₂O₃,the mechanism of carbon nanotube loaded by ferric oxide was discussed by utilizing IR and TGA. The results showed that carbon nanotubes treated by HNO₃ / H₂SO₄ had much better performace for loaing ferric oxide than by HCL. the composite catalysts of carbon nanotube loaded by ferric oxide was got through the decomposition of Fe(NO₃)₃. This method is simple in operation and the quantity of the catalysts of ferric oxide is under control by the time of the marination. 2. Development of Capacitive Deionization Device(CDD) with CNTs Film Electrodes and studies of its performanceIn this study we show a route to capacitive deionization process used CNTs Film as electrode materials. The nanomaterial directly synthesized by Low Pressure CVD system has high surface area and consists of lots of CNTs. We directly use this CNTs Film to fabricate the capacitive deionization device and The character of CNTs Films were investigated by TEM, SEM, Raman, BET, IR, etc. The deionization performance of CDD was tested and the desirable results of salt removed are gained. The effects of...