| Electrospinning synthesis has been considered to be one of the simplest and most convenient methods to fabricate nanofibers. Nanofibers obtained by electrospinning have gained great interest due to its high surface/volume ratio and pore size, and uniform morphology. To date, electrospinning fibers have been found potential applications in fields of biology, chemical and biological sensors, environment, energy and so on. On the other hand, inorganic luminescent material has been used in displays, lightings, information storage amplifications, clinical diagnosis, which play a crucial role in the national economy and people's daily life. Therefore, it is of great significance to develop the novel, stable, effective and environmental friendly luminescent materials. In this work, we devoted to carrying on exploratory research for the synthesis, morphology control, emission mechanisms and applications of luminescent nanofibers synthesized by electrospinning method.This study focuses on two types of defect-related luminescent nanocomposite materials:SiO2/HAP and SiO2/Al2O3 composite nanofibers. SiO2/HAP hybrid nanofibers have been prepared by using the electrospinning process. The diameter of SiO2/HAP composite nanofibers is about 100 nm. The defect-related luminescence can be realized by a simple calcination treatment. The relationship between the morphology and luinescence properties of SiO2/HAP hybrid nanofibers with different Ca/Si ratios have been investigated in detail.Moreover, the loading, releasing, biodegradable and biocompatible properties of the SiO2/HAP hybrid drug carrier were also studied with vancomycin?VCM? as a drug model.The result indicates that the defect-related luminescent SiO2/HAP hybrid nanofibers show a drug loading and controlled release properties for VCM. Therefore, this luminescent nanomaterial may be potentially applied in fields of drug delivery and disease therapy.The SiO2/Al2O3 hybrid nanofibers were also prepared by electrospinning route. The diameter of SiO2/Al2O3 hybrid nanofibers is about 200 nm. Under UV irradiation, the as-prepared SiO2/Al2O3 fibers exhibit intense defect-related white-blue emission. It can be found that the two intense emission bands are centered at 272 and 306 nm, respectively. Theemission mechanisms as well as the influence of doping Al on the emission properties were also investigated in detail. The as-synthesized SiO2/Al2O3 luminescent material may find potential applications as a novel efficient, environmentally friendly blue white-light phosphors due to its low cost, nontoxic nature and wide range of excitation. |
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