期刊
DALTON TRANSACTIONS
卷 45, 期 34, 页码 13503-13508出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6dt02049f
关键词
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资金
- National Natural Science Foundation of China [51572019]
- National Science Fund for Excellent Young Scholars of China [51522402]
- [FRF-TP-13-006A]
- [FRF-TP-15-006C1]
Coaxial nanocables (CNs) with an SiC core and a SiO2 shell were fabricated at a large scale by a simple and low cost method. The thickness of the SiO2 shell could be controlled by etching in 1 M NaOH aqueous solution for different amounts of time. XRD, SEM, TEM, HRTEM, PL and UV-Vis spectra were adopted to investigate the morphology and optical properties of the obtained SiC/SiO(2)CNs. Blue photoluminescence was observed at room temperature from the coaxial structure. The intensity of the single emission band at 468 nm (2.65 eV) exhibited a strong dependence on the thickness of the SiO2 layer and was significantly enhanced when the outer SiO2 shell had a thickness of 2.8 nm. The enhancement effect was attributed to oxygen vacancies (OV) and this was verified by deliberately enriching the surface OV through hydrogen treatment.
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