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Synthesis of CuO and Cu 3 N Nanoparticles in and on Hollow Silica Spheres
Author(s) -
Deshmukh Rupali,
Schubert Ulrich
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201201442
Subject(s) - calcination , nanoparticle , copper , chemistry , mesoporous silica , spheres , mesoporous material , chemical engineering , nanocomposite , copper oxide , inorganic chemistry , nanotechnology , materials science , catalysis , organic chemistry , physics , astronomy , engineering
Abstract Copper oxide nanoparticles within hollow mesoporous silica spheres were prepared by binding/adsorbing Cu 2+ or [Cu(NH 3 ) 4 (H 2 O) 2 ] 2+ ions on the surface of carbon spheres, followed by formation of a mesoporous silica shell by sol–gel processing and calcination in air. The CuO nanoparticles can subsequently be converted into Cu 3 N nanoparticles by nitridation with ammonia. The effect of the different copper precursors, i.e. Cu 2+ and [Cu(NH 3 ) 4 (H 2 O) 2 ] 2+ , on the nanocomposites was studied. CuO nanoparticles on the outer surface of hollow silica spheres were obtained by thermal treatment of hollow CuSiO 3 spheres in air. Nitridation of the CuSiO 3 spheres with ammonia resulted in Cu 3 N@SiO 2 composites, with aggregated Cu 3 N nanoparticles on hollow silica spheres.