green chemistry approach for the synthesis of cuo nanostructure

molecular sieves mcm-41 were synthesized from rice husk ash (rha) as alternative sources of silica. the material was synthesized by a room temperature method from a gel with the molar composition sio2: 1.6ea: 0.215hdtmabr: 325h2o with ph correction. the cetyltrimethylammonium bromide (ctmabr) was used as a structure template. nanocomposite containing 5.0 and 10.0 wt.% of cu was synthesized under solid state reaction. the calcinations of samples were done at two different temperatures, 400 and 600◦c. the morphology and the physicochemical properties of the prepared samples were investigated by x-ray diffraction (xrd), uv–vis diffuse reflectance spectroscopy (uv–vis drs), fourier transform infrared spectroscopy (ftir) and transmission electron microscopy (tem). tem images indicated that nanoparticles size of cuo is ~ 3 nm.