Journal ArticleDOI
Preparation of nanosized nickel aluminate spinel by a sonochemical method
TLDR
In this article, nanosized nickel aluminate spinel particles have been synthesized with the aid of ultrasound radiation by a precursor approach using an aqueous solution of nickel nitrate, aluminium nitrate and urea.Abstract:
Nanosized nickel aluminate spinel particles have been synthesized with the aid of ultrasound radiation by a precursor approach. Sonicating an aqueous solution of nickel nitrate, aluminium nitrate and urea yields a precursor which on heating at 950 °C for 14 h yields nanosized NiAl 2 O 4 particles with a size of ca. 13 nm and with a surface area of about 108 m 2 g −1 . The nanosized nickel aluminate particles as well as the precursor have been characterized by elemental analysis, powder X-ray diffraction, Transmission electron microscopy, Thermogravimetric analysis, DSC, FT-IR, Diffuse reflectance spectroscopy and BET surface area measurements.read more
Citations
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General synthesis and delamination of highly crystalline transition-metal-bearing layered double hydroxides.
TL;DR: A general process for the synthesis and delamination of a family of highly crystalline Al-based and transition-metal-bearing layered double hydroxides (LDHs) using the urea method and subsequent anion-exchange processes is described.
Journal ArticleDOI
Combustion synthesis and characterization of Sn4+ substituted nanocrystalline NiFe2O4
TL;DR: In this article, a series of Sn4+ substituted NiFe2O4 with general formula Ni1−xSnxFe 2O4 (x = 0.6, 0.8) has been prepared by novel combustion synthetic method and evaluated for their structural and electrical properties.
Journal ArticleDOI
Sol-Gel Synthesis of Nanoscaled Spinels Using Propylene Oxide as a Gelation Agent
TL;DR: In this article, a sol-gel route with propylene oxide as a gelation agent was used to synthesize mixed oxide nanoparticles, especially for that with one of metal ion having a formal charge of less than +3.
Journal ArticleDOI
The influence of Ni loading on the activity and coke formation of ultrasound-assisted co-precipitated Ni–Al2O3 nanocatalyst in dry reforming of methane
TL;DR: In this article, mesoporous nanocrystalline Ni-Al2O3 powders with different Ni loadings were synthesized via ultrasonic assisted co-precipitation method and employed in methane dry reforming.
Journal ArticleDOI
Dielectric behavior and ac electrical conductivity of nanocrystalline nickel aluminate
TL;DR: In this paper, the dielectric properties of nickel aluminate were studied as a function of the frequency of the applied ac signal at different temperatures, and it was seen that the real Dielectric constant ǫ was seen to decrease with frequency of applied field while the ac conductivity increased as the applied field increased.
References
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Sonochemical synthesis of amorphous iron
TL;DR: In this paper, the synthesis of metallic glass powders using the microscopically extreme (yet macroscopically mild) conditions induced by high-intensity ultrasound was described, and the results showed that metallic glass powder is a highly active catalyst for the Fischer-Tropsch hydrogenation of carbon monoxide and for hydrogenolysis and dehydrogenation of saturated hydrocarbons.