Manivong, A.; Boonyarattanakalin, K. .; Pecharapa, W.; Chongsri, K.; Mekprasart, W. Morphological and Optical Studies of Silica Powders from Waste-Materials by Milling Process for Light-Harvesting Applications. J. Mater. Sci. Appl. Energy. 2021, 10, 70-77.