Templating Synthesis And Property Of Carbon And Silica-Based Functional Nanofibers

In this dissertation, templating routes have been successfully developed to synthesize of one-dimensional (1D) nanostructures including ultra-thin tellurium nanowires with 4-9 run in diameters, fluorescent Te@Carbon nanocables, carbon nanofibers, silica nanotubes and silica nanotubes nanoreactors embedded with noble metal nanoparticles. Ultra-thin nanowires with 4-9 nm in diameters and nanobelts can be rationally synthesized by taking advantage of the PVP selective adsorption on different crystal plane of tellurium. Hydrothermal carbonization process of glucose can be well controlled to synthesize uniform Te@Carbon with high fluorescent properties and carbon nanofibers in presence of tellurium nanowires. Silica nanotubes with adjustable PL properties have been synthesized by templating from the as-prepared carbon nanofibers. A general method has been developed to fabricate amorphous silica nanotubes embedded with noble metal nanoparticles. The main results were summarized as follows.1. A simple and mild hydrothermal route has been developed to induce the anisotropy growth of tellurium and synthesize 1D nanomaterials in presence of a polymer surfactant PVP. Ultra-thin Te nanowires and nanobelts can be selectively synthesized by adjusting the amount of PVP and other reaction parameters. The ultra-thin tellurium nanowires with only 4-9 nm in diameters have been synthesized for the first time.2. A mild hydrothermal route has been designed for the synthesis of uniform core-shell Te@carbon nanocables and carbon nanofibers. The results demonstrated that the ultra-thin Te nanowires can effectively restrain the usual homogeneous nucleation of carbon spheres from the bulk solution. A facile one-pot chemical solution approach has been...