Synthesis Of Inorganic Nanomaterials By Using Fiber As The Template

The properties of inorganic nanomaterials which have been widely used in energy, atalysis, magnetic data storage and other fields are very different from bulk materials. Many methods were used for preparing of inorganic nanomaterials. In recent years, biotemplating method is very popular because that it's a green, effective, and easy way to obtain the inorganic nanomaterials with biological materials'structure.Fiber is one of the richest renewable natural organic macromolecules on the Earth. Fiber macromolecules present interesting dynamic supramolecular associations facilitated by inter andintramolecular hydrogen bonding resulting in molecular level capsules, which can act as a template for nanoparticle growth. It is readily available, renewable and low cost. The conclusions are summarized as follows:Firstly, hierarchical MnO2 microtubules were prepared by using cotton as the template and KMnO4 as the precursor via a"green"route. Besides, Co3O4 and NiO microtubules were prepared by using cotton as a template. Advanced instruments including XRD,TEM,N2 sorption and so on are applied to the analysis of the structure and morphology on the samples. And the possible mechanisms for the formation of the samples were discussed.Secondly, Co/C and Ni/C composites were prepared by using cotton as the precursor of carbon via a facile"green"approach. No reducing agent was used in the experiments.These Co and Ni nanoparticles are highly stable in air.Lastly, the SiO₂ with mesoporous structures were also prepared by the cotton and filter paper templates, respectively. The resultant SiO₂ with fibrous structure is hollow on micro-scale. The BET surface areas of the SiO₂ are high to 368 m2/g. Otherwise, the effects of the the concentration of solution are studied. And the TiO2 with mesoporous structures was also prepared.