Bor nitrür nanotüp üretimi

Download

TVRBNE1EUTA.pdf

Date

2010

Author

Özmen, Didem
Sezgi, Naime Aslı
Balcı, Suna

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

321
views

797
downloads

The further developments in nanotechnology in last few years provide usage of nanoscale particles for many applications in various areas such as electronics, pharmaceutical, and biomedical due to their strengthened mechanical, thermal and electrical properties. Boron nitride nanotubes are a good example of nanoparticles. In this study, boron nitride nanotubes were successfully synthesized from the reaction of ammonia gas with mixture of boron and iron oxide. Physical and structural properties of the synthesized materials were determined by X-Ray Diffraction, Energy Dispersive X-Ray Spectroscopy, nitrogen sorption, X-Ray Photoelectron Spectroscopy, Fourier Transform Infrared Spectroscopy, and Scanning Electron Microscopy. Experiments were conducted in a tubular furnace at different temperatures, inlet gas compositions, and weight ratios of boron to iron oxide. Qualitative and quantitative chemical analyses of the reactor effluent stream were carried out using a mass spectrometer. The mass spectrometer analysis of the reactor effluent proved formation of nitrogen and hydrogen during the reaction of ammonia gas with the mixture of boron and iron oxide. Decomposition of ammonia gas was the only reaction taking place in the gas phase. Nitrogen formed from decomposition of the ammonia reacted with FeB formed from the reaction of boron and iron oxide to form boron nitride nanotubes. XRD results showed that hexagonal and rhombohedral boron nitrides and cubic iron were the solid phases formed in the product. FTIR and XPS results also indicated the presence of boron nitride and the atomic ratio of boron to nitrogen was compatible with the chemical stoichiometric relation between boron and nitrogen. It was observed that the crystanility of the product increased with an increase in temperature. The diameter of the produced nanotubes varied from 64 nm to 136 nm. The synthesized nanotubes exhibited Type II isotherms. The surface areas of the produced x boron nitride nanotubes decreased with a decrease in both temperature and the weight ratio of boron to iron oxide. The best temperature and weight ratio of boron to iron oxide to produce boron nitride nanotubes were found to be 1300°C and 20, respectively.

Subject Keywords

Boron Nitride, Nanotubes, Characterization, Synthesis, Nanotechnology

URI

https://app.trdizin.gov.tr/publication/project/detail/TVRBNE1EUTA
https://hdl.handle.net/11511/49911

Collections

Department of Chemical Engineering, Project and Design

Suggestions

OpenMETU
Core

Production and characterization of boron nitride nanotubes Özmen, Didem; Sezgi, Naime Aslı; Department of Chemical Engineering (2008) The further developments in nanotechnology in last few years provide usage of nanoscale particles for many applications in various areas such as electronics, pharmaceutical, and biomedical due to their strengthened mechanical, thermal and electrical properties. Boron nitride nanotubes are a good example of nanoparticles. In this study, boron nitride nanotubes were successfully synthesized from the reaction of ammonia gas with mixture of boron and iron oxide. Physical and structural properties of the synthes...
Adsorption properties of boron nitride nanotubes Khan, Saeed Ahmad; Sezgi, Naime Aslı; Balcı, Fatma Suna; Department of Chemical Engineering (2016) The developments in nanotechnology in last decades have provided use of nanoparticles for many applications in various areas such as electronics, fuel cells, composites, cosmetics, and biomedical. They have excellent mechanical, thermal, and electrical properties. Nanotechnology is one of the fastest growing areas in materials and engineering science and biotechnology. Nanotubes have been one of the most regarded and studied type of nanoparticles up to now. Boron nitride nanotubes (BNNTs) are an important m...
Optimization of fabrication steps for n-type c-Si solar cells Orhan, Efe; Ünalan, Hüsnü Emrah; Department of Metallurgical and Materials Engineering (2019) Crystalline silicon (c-Si) solar cells fabricated on p-type wafers are still dominating the photovoltaic (PV) industry due to advantages in device processing and early focus on p-type cells in the development phase of the industry. Over the years, studies on n-type Czochralski (CZ) substrates have shown that they can be more desirable for the terrestrial applications due to superior material and process advantages such as higher minority carrier lifetime, easier passivation of the surface, absence of light ...
Analysis of boron doped hydrogenated amorphous silicon carbide thin film for silicon heterojunction solar cells Salimi, Arghavan; Turan, Raşit; Department of Micro and Nanotechnology (2019) Silicon based solar cells are the dominant type of solar cells in the photovoltaic industry. Recently, there have been increasing efforts to develop c-Si solar cells with higher efficiency and lower cost. Among them, silicon heterojunction solar cell (SHJ) is attracting much attention because of its superior performance values demonstrated at both R&D and industrial levels. One of the common limiting criteria is the recombination at the front side which can be solved by providing proper passivation at the f...
Synthesis of gold nanowires with high aspect ratio and morphological purity Dertli, Elçin; Nalbant Esentürk, Emren; Ünalan, Hüsnü Emrah; Department of Micro and Nanotechnology (2012) Metal nanoparticles have unique optical, electrical, catalytic and mechanical properties, which lead them to various applications in nanotechnology. In particular, noble metal nanowires are attracting growing attention due to their potential applications such as in opto-electronic devices and transparent conductive contacts (TCCs). There are two general approaches to synthesize nanowires: template-assisted and solution phase methods. However, these synthesis approaches have various disadvantages. For exampl...

Citation Formats

D. Özmen, N. A. Sezgi, and S. Balcı, “Bor nitrür nanotüp üretimi,” 2010. Accessed: 00, 2020. [Online]. Available: https://app.trdizin.gov.tr/publication/project/detail/TVRBNE1EUTA.