Glass to which certain metallic oxides have been added will absorb wavelengths corresponding to certain colours and let others pass, thus appearing tinted to the eye.
Exceptions to this are the zeolites (aluminum silicate minerals or their synthetic analogues that contain water in indefinite amounts) as well as similar clay minerals, certain clays, and metallic oxides, which have variable proportions of water in their hydrated forms; zeolites lose and regain water reversibly with little or no change in structure.
Metallic copper and copper oxides have been employed as heterogeneous catalysts for numerous environmental progressions, e.g., selective reduction in nitric oxide, oxidation of carbon monoxide and decomposition of nitrogen dioxide [6].
One-dimensional (1-D) metallic oxide nanostructures have been extensively studied due to their numerous applications as basic building blocks in a variety of nanodevices.
Simple prediction with Scherrer's equation using (111) peak as the reference demonstrates the decrease in crystallite size due to the addition of dopants, with the tri-metallic oxide sample having the lowest size (see Table 1).
Employing nanomaterials like carbon-based nanomaterials, metallic nanoparticles (such as silver and gold), metallic oxides, etc., in electrochemical biosensor has been discussed.
Recently there has been a huge development of nanotechnology in the science and technology field; metallic nanoparticles, like gold, silver, iron, Zn, and metal oxide nanoparticles, have shown great challenges in the field of medicine and its applications [ 18].
Besides organic dyes, metallic nanoparticles like gold nanoparticles and graphene oxide have also been frequently investigated as superior quenchers of UC donors in homogeneous assays.
His generalization of the older acid/base chemistry led him to extend chemical nomenclature that Lavoisier had introduced to cover the bases (mostly metallic oxides), a change that allowed Berzelius to name any compound consistently with Lavoisier's chemistry.
