Synthesis and Optical Manifestation of NiO-Silica Nanocomposite

Figure 4

Optical absorption spectra for NiO-silica nanocomposite prepared at different temperatures. The inset A shows the optical absorbance of pure silica prepared by sol-gel method followed by 800°C heat treatment for 10 min. Inset B shows absorbance peak position versus oxidation temperature curve of the NiO-silica nanocomposite. Dotted line is for the eye guidance.