SiO2-TiO2 NANOCOMPOSITE WITH SILICA FROM THE RICE HUSK FOR DECOMPOSITION OF METHYLENE BLUE
Keywords:
Nanocomposite, Adsorption, Photocatalytic, Rice Husk, Titanium DioxideAbstract
The study of SiO2-TiO2 nanocomposite (SiO2-TiO2) with silica from the rice husk was intended to be enhanced the photocatalytic of titanium dioxide (TiO2) for decomposition of methylene blue. The morphology of the hybrid was characterized by XRD, FT-IR and SEM. The photocatalytic activity was study by using the degradation of methylene blue with spectrophotometry technique. From the study found that, Silica (SiO2) can be extracted from the rice husk at 6.62%. After prepared to SiO2-TiO2 composite, the hybrid presented the spherical particles at diameter of about 0.5 μm. The SiO2-TiO2 nanocomposite showed the photocatalytic activity at 91.65 % in sunlight at 660 min, while the pure titanium dioxide revealed the photocatalytic activity at 48.45 % in sunlight at the same time. The photocatalytic activity of SiO2-TiO2 nanocomposites was higher than pure titanium dioxide (TiO2). Indicating that the mesoporous silica (SiO2) can be improved the photocatalytic efficiency of titanium dioxide. It is related to the structure and particle sizes of the titanium dioxide (TiO2) as well as adsorption of methylene blue of silica (SiO2) were resulting photocatalytic activity in better.
The prepared nanocomposite material was effective in degrading the color of methylene blue under sunlight.
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