The Preparation Of One Dimensional Nanomaterials And The Pollutant Removal

Carbon nanotube(CNTs), as one of the most important nanomaterials, has attracted more and more interest in recent years. A series of functional carbon nanotubes can be obtained by giving all kinds of features on carbon nanotubes to endow with some novel properties, and further controlling the composition and morphology of CNTs. The thesis mainly introduces the preparation of a series of carbon nanotube and magnetic carbon nanotube composites material and its application in adsorption and catalytic research.The first part: a facile route was developed to synthesise mesoporous nickel silicate coated on carbon nanotubes(CNTs) with a larger hole based on the mesoporous silica coated on the CNTs. It was found that the two kinds of mesoporous silica coated on the CNTs exhibit an excellent performance on the removal of MB by adsorption. Compared with the other work, our method is low cost, simple and has a high efficiency, and more importantly, this method shows great potential in applying other types of the mesoporous materials such as SBA-15 and so on. Furthermore, magnetic mesoporous silica coated carbon nanotubes were produced from hydrophilic monodisperse magnetic nanoparticles decorated carbon nanotubes using well controlled programmed synthesis method for easily separating from the solution. The shell thickness of m Si O2 can be easily adjusted by controlling the amount of TEOS precursor. The well-designed mesoporous magnetic nanotubes had a large specific area, a highly open mesoporous structure and high magnetization. The resulting composites show not only a magnetic response to an externally applied magnetic field, but also can be a good adsorbent for the organic pollutant in the ambient temperature.The second part: two kind of polymers(Polydopamine, and Phenolic resin) were coated on magnetic carbon nanotubes nanomaterials. Firstly, CNTs/Fe3O4 nanocomposite was fabricated using a one pot procedure. Multifunctional nanocables were prepared by directly welding superparamagnetic Fe3O4 nanoparticle decorated CNTs and Au nanoparticles together with polymer(Pdop or PFR) as “glue” in a facile but effective way. The shell thickness of polymer can be easily adjusted by controlling the amount of precursor. More importantly, the polymers(PFR, Pdop) have been shown to be an effective carbon source for the formation of carbon-coated materials. Methylene blue was selected to investigate the adsorption and catalyst property of the prepared materials. Morover, these core–shell nanocables exhibited high adsorption capacity and catalyst for multiple pollutants and good reusability.