Publication: Renewable decyl-alcohol templated synthesis of Si-Cu core-shell nanocomposite
Date
2013
Authors
Salim M.A.
Misran H.
Othman S.Z.
Shah N.N.H.
Razak N.A.A.
Manap A.
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Physics Publishing
Abstract
Monodispersed silica spheres with particles size of ca. 450 nm were successfully synthesized using a modified St�ber method. The synthesized monodispersed silica spheres were successfully coated with copper using modified sol-gel method employing nonsurfactant surface modifiers and catalyst. A renewable palm oil based decyl-alcohol (C10) as nonsurfactant surface modifiers and catalyst were used to modify the silica surfaces prior to coating with copper. The X-ray diffraction patterns of Si-Cu core-shell exhibited a broad peak corresponding to amorphous silica networks and monoclinic CuO phase. It was found that samples modified in the presence of 1 ml catalyst exhibited homogeneous deposition. The surface area of core materials (SiO2) was at ca. 7.04 m2/g and Si-Cu core-shell was at ca. 8.21 m2/g. The band gap of samples prepared with and without catalyst was calculated to be ca. 2.45 eV and ca. 3.90 eV respectively based on the UV-vis absorption spectrum of the product. � Published under licence by IOP Publishing Ltd.
Description
Keywords
Amorphous silicon , Catalysts , Copper , Coremaking , Silicon , Sol-gel process , Ultraviolet spectroscopy , X ray diffraction , Amorphous silica , Core-shell nanocomposites , Homogeneous deposition , Modified sol-gel method , Monodispersed silica spheres , Surface modifiers , Templated synthesis , UV-VIS absorption spectra , Absorption , catalyst , copper , deposition , nanotechnology , particle size , renewable resource , silica , surface area , surfactant , ultraviolet radiation , X-ray diffraction , Silica