One-Dimensional SiC Nanostructures: Synthesis and Properties

Zhou, Weimin; Zhang, Yafei; Niu, Xiaoming; Min, Gao

doi:10.1007/978-0-387-74132-1_2

Cited by 25 publications

(27 citation statements)

References 132 publications

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“…In some cases, the SiC nanowires contained arrays of planar defects, also resulting in characteristic multiple reflexes in the diffraction pattern (see SAED pattern in Fig. 7(b), top right), as highlighted by the XRD results and previous investigations 24,28,65 …”

Section: Resultsmentioning

confidence: 55%

Growth of One‐Dimensional Nanostructures in Porous Polymer‐Derived Ceramics by Catalyst‐Assisted Pyrolysis. Part II: Cobalt Catalyst

Vakifahmetoğlu

Colombo

Carturan

et al. 2010

Journal of the American Ceramic Society

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Via catalyst-assisted pyrolysis, Si3N4 and SiC nanowires were produced on the cell walls of polymer-derived ceramic foams. The pyrolysis atmosphere and temperature were the main parameters affecting their development: silicon nitride singlecrystal nanowires formed under nitrogen, while silicon carbide ones were produced under argon, and their amount increased with the increasing pyrolysis temperature. Brunauer–Emmett– Teller analysis showed that the presence of the nanowires afforded high specific surface area (SSA) values to the macroporous ceramic foams, ranging from 10 to 110 m2/g. Co-containing samples developed higher SSA values, especially after pyrolysis at 14001C in N2, than samples containing Fe as a catalyst. The differences were explained in terms of morphology (diameter and assemblage), which depended on the processing conditions and the catalyst type (Co or Fe)

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Section: Resultsmentioning

confidence: 55%

Growth of One‐Dimensional Nanostructures in Porous Polymer‐Derived Ceramics by Catalyst‐Assisted Pyrolysis. Part II: Cobalt Catalyst

Vakifahmetoğlu

Colombo

Carturan

et al. 2010

Journal of the American Ceramic Society

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“…have a larger energy band gap than their bulk ones, [21][22][23][24][25][26][27][28][29][30][31][32] and most of these nanostructures have a strong light emission in ultraviolet regions. Therefore, it is very interesting and challenging to explore the PL properties of SiC:Tb nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, microstructure, and photoluminescence properties of thornlike SiC:Tb nanostructures

Zhou

Song

et al. 2010

J. Mater. Res.

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Thornlike Tb-doped SiC (SiC:Tb) nanostructures were synthesized through a carbothermal reduction of electrospun Tb-doped SiO 2 nanofibers (SiO 2 :Tb). The synthesized SiC nanostructures annealed at a high temperature of 1300 C displayed a unique morphology and a high crystalline quality with the b-SiC phase. Strong green-light emissions were detected from the SiC:Tb samples. Photoluminescence excitation results show that, besides a small amount of energy coming from the SiC cores (464 nm), most of the energy needed for the excitation of Tb 3þ ions comes from the light absorption of the SiO 2 -Tb surface layers (295 nm) and near-interface regions in the samples (388 nm). Transmission electron microscopy, energy dispersive spectrometry, and Raman analyses suggested that the formations of Tb clusters and SiO 2 surface layers are very important to the enhancement of the luminescence behaviors of Tb 3þ ions. Finally, we have constructed an excitation model and further proposed an energy transfer mechanism for these thornlike SiC:Tb nanostructures.

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“…However, the low thermal conductivity, low selectivity, and weak chemical and mechanical resistance in the oxidation process are the main restrictions of these supports. So, the tendency to synthesize of new materials with better properties has increased …”

Section: Introductionmentioning

confidence: 99%

Porous MoO₃@SiC hallow nanosphere composite as an efficient oxidative desulfurization catalyst

Gomi

Afsharpour

2019

Applied Organom Chemis

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A novel N‐doped MoO3@SiC hollow nanosphere has been synthesized through two steps. Due to the first step, N‐doped MoO2@C nanosphere was synthesized using the hydrothermal method and in the second step, Si‐C bonds were formed through the low‐temperature magnesiothermic method and MoO3@SiC hollow nanosphere was produced. The prepared nanostructures were identified by various techniques such as IR, XRD, XPS, BET/BJH, SEM/EDS, and Raman spectroscopy. Results show that converting of C to SiC increase the surface area from 17 to 241 m2/g with remarkably decrease in pore diameter. Also, molybdenum is present in the form of MoO2 in carbon catalyst while during magnesiothermic process, it transfers to MoO3 form in the SiC catalyst. The synthesized products were employed as catalysts in oxidative desulfurization of model fuel. The results displayed that MoO3@SiC hollow nanostructure shows a superior catalytic activity (99.9%, 40 min) compared to C support (56%, 60 min). Furthermore, the recycling of MoO2@C catalyst shows a dramatic decrease even after the first run, while, SiC support exhibit higher stability during the stronger interaction between molybdenum catalyst and SiC support.

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One-Dimensional SiC Nanostructures: Synthesis and Properties

Cited by 25 publications

References 132 publications

Growth of One‐Dimensional Nanostructures in Porous Polymer‐Derived Ceramics by Catalyst‐Assisted Pyrolysis. Part II: Cobalt Catalyst

Growth of One‐Dimensional Nanostructures in Porous Polymer‐Derived Ceramics by Catalyst‐Assisted Pyrolysis. Part II: Cobalt Catalyst

Synthesis, microstructure, and photoluminescence properties of thornlike SiC:Tb nanostructures

Porous MoO₃@SiC hallow nanosphere composite as an efficient oxidative desulfurization catalyst

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One-Dimensional SiC Nanostructures: Synthesis and Properties

Cited by 25 publications

References 132 publications

Growth of One‐Dimensional Nanostructures in Porous Polymer‐Derived Ceramics by Catalyst‐Assisted Pyrolysis. Part II: Cobalt Catalyst

Growth of One‐Dimensional Nanostructures in Porous Polymer‐Derived Ceramics by Catalyst‐Assisted Pyrolysis. Part II: Cobalt Catalyst

Synthesis, microstructure, and photoluminescence properties of thornlike SiC:Tb nanostructures

Porous MoO3@SiC hallow nanosphere composite as an efficient oxidative desulfurization catalyst

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Product

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About

Porous MoO₃@SiC hallow nanosphere composite as an efficient oxidative desulfurization catalyst