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- Title
Fe(NO<sub>3</sub>)<sub>3</sub>-assisted large-scale synthesis of Si<sub>3</sub>N<sub>4</sub> nanobelts from quartz and graphite by carbothermal reduction-nitridation and their photoluminescence properties.
- Authors
Liu, Shuyue; Fang, Minghao; Huang, Zhaohui; Huang, Juntong; Ji, Haipeng; Liu, Haitao; Liu, Yan-gai; Wu, Xiaowen
- Abstract
The large-scale synthesis of Si3N4 nanobelts from quartz and graphite on a graphite-felt substrate was successfully achieved by catalyst-assisted carbothermal reduction-nitridation. The phase composition, morphology, and microstructure of Si3N4 nanobelts were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, energy-dispersive spectroscopy, transmission electron microscopy, and high-resolution transmission electron microscopy. The Si3N4 nanobelts were ~4-5 mm long and ~60 nm thick and exhibited smooth surfaces and flexible shapes. The Si3N4 nanobelts were well crystallized and grow along the [101] direction. The growth is dominated by the combined mechanisms of vapor-liquid-solid base growth and vapor-solid tip growth. The Fe(NO3)3 played a crucial role in promoting the nanobelt formation in the initial stage. The room-temperature photoluminescence spectrum of Si3N4 nanobelts consists of three emission peaks centered at 413, 437, and 462 nm, indicating potential applications in optoelectronic nanodevices.
- Subjects
NANOBELTS; NANORIBBONS; NANOSTRUCTURED materials; OXIDE minerals; GRAPHENE
- Publication
Scientific Reports, 2015, p8998
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep08998