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Synthesis of High Temperature Stable Carbon Coated Metal Nanoparticles in AlPO 4 Based Matrix In Situ in Oxidative Atmosphere
Author(s) -
Maharana Rajalaxmi,
Bhanu Prasad Velidandla Venkata,
Roy Subir,
Prasad Durga,
Kumar Koushi,
Paik Pradip,
Hebalkar Neha,
shukla Astha,
Bal Rajaram
Publication year - 2016
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13956
Subject(s) - nanoparticle , materials science , nanocomposite , carbon fibers , chemical engineering , x ray photoelectron spectroscopy , metal , graphite , matrix (chemical analysis) , reducing atmosphere , amorphous carbon , amorphous solid , nanotechnology , composite material , chemistry , metallurgy , composite number , organic chemistry , engineering
In this work, we have reported a universal method for the synthesis of metal nanoparticles coated with graphite layer in AlPO 4 based matrix. As an example, graphitized carbon coated Ag, Pt, Cu and Ni nanoparticles were synthesized in the amorphous AlPO 4 based matrix. The metal nanoparticles were protected from oxidation up to very high temperatures due to the low oxygen diffusivity in AlPO 4 based matrix and carbon coating over the metal nanoparticles. The oxidation states of the Ag and Ni nanoparticles were detected with the help of X‐ray photoelectron spectroscopy. The synthesis technique followed very simple methodology. The entire processing including heat treatments at higher temperatures were carried out in oxidative atmosphere. The mechanism for the formation of metal particle in AlPO 4 based matrix has also been addressed. This approach can be a universal approach to achieve metal nanoparticles in AlPO 4 based matrix. Finally, catalyzing activities of the AlPO 4 ‐Cu nanocomposites in the oxidation of cyclohexane, AlPO 4 ‐Ni and AlPO 4 ‐Pt nanocomposites in the reduction in 4‐nitrophenol were successfully investigated.