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In situ X-ray diffraction study on the growth kinetics of NiO nanoparticles
C T Meneses1, J M A Almeida, J M Sasaki
1Núcleo de Física, Universidade Federal de Sergipe, Campus Professor Alberto Carvalho, Itabaiana, SE, Brazil. cmeneses@fisica.ufs.br
Journal of Synchrotron Radiation
|April 20, 2010
Summary
The study investigated nickel oxide (NiO) nanoparticle growth kinetics using in situ X-ray diffraction. Imaging plate detection proved more efficient, revealing that lower heating rates accelerate NiO nanoparticle growth.
Area of Science:
- Materials Science
- Nanotechnology
- Solid State Chemistry
Background:
- Nickel oxide (NiO) nanoparticles are crucial in various applications, necessitating understanding their formation and growth.
- Controlling nanoparticle size and morphology is key to optimizing material properties.
- In situ characterization techniques are vital for observing dynamic processes like nanoparticle growth.
Purpose of the Study:
- To investigate the growth kinetics of NiO nanoparticles.
- To compare the efficiency of conventional and imaging plate detection systems in X-ray diffraction for studying nanocrystalline materials.
- To determine the effect of heating rates on NiO nanoparticle growth.
Main Methods:
- In situ X-ray diffraction (XRD) with conventional and imaging plate detection systems.
- Thermal decomposition of amorphous NiO precursors synthesized via coprecipitation.
- Analysis of XRD patterns to determine crystallite size and diffusion coefficients.
Main Results:
- Imaging plate detection offers superior efficiency for observing crystallite growth in nanocrystalline materials compared to conventional detection.
- Lower heating rates significantly accelerate the growth process of NiO nanoparticles.
- Particle size and diffusion coefficients were correlated with thermal conditions and detection methods.
Conclusions:
- The imaging plate detection system is highly effective for in situ studies of nanocrystalline material growth.
- Heating rate is a critical parameter influencing NiO nanoparticle growth kinetics.
- Understanding these kinetics provides insights for controlled synthesis of NiO nanoparticles.
