掺杂碳量子点的二氧化硅纳米管的合成与表征

o obtain the carbon quantum dots doped silica nanotubes, firstly organosilica nanotubes were formed through the hydrolysis and crystallization of the organosilane precursor using commercially available P123 as surfactant. Then the carbon doped silica nanotubes were fabricated after carbonization in N2 atmosphere. The nanotubes were investigated by the field emission transmission electronic microscope (TEM), nitrogen absorption/ desorption isotherm (BET), thermogravimetry (TG), Raman spectrum and photoluminescense spectrum. The results show that carbon-doped silica nanotubes with mesoporous tubular structures were successfully prepared. Finally, HF was used to dissolve silica and the remaining carbon was characterized by high-resolution TEM and photoluminescence spectrum (PL spectrum). The clear crystalline fringes as well as favorable photoluminescense effect of the about 2-4nm carbon nanoparticles could be observed, which is suitable for expressing the characteristics of the carbon quantum dots, demonstrating that carbon quantum dots are doped in the nanotubes.