Preparation of CSNPs-TiO2@SiNPs Nanocomposite from Rice Husk for Decolorization of Dyes
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Abstract
This research to study on the preparation of a nanocomposite material, CSNPs-TiO2@SiNPs, using chitosan nanoparticles (CSNPs) derived from shrimp shells combined with titanium dioxide (TiO2) embedded in silica nanoparticles (SiNPs) synthesized from rice husk ash. The purpose of this composite is to enhance the efficiency of dye degradation, specifically methylene blue. The characterization of the CSNPs-TiO2@SiNPs nanocomposite was carried out using several techniques, including X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Dynamic Light Scattering (DLS), and Scanning Electron Microscopy (SEM). The photocatalytic activity for the reduction of methylene blue was tested using UV-Visible spectroscopy.
XRD analysis revealed that TiO2 exhibited an anatase crystal structure. DLS analysis showed that the particle sizes of CSNPs, TiO2, and SiNPs were 356.7 nm, 224.3 nm, and 422.8 nm, respectively. SEM analysis of the CSNPs-TiO2@SiNPs composite, prepared with TiO2 at varying amounts (0.5, 1.0, and 3 grams), indicated that chitosan and TiO2 were well-dispersed within the porous structure of the silica derived from rice husk. In terms of photocatalytic performance, with an initial methylene blue concentration of 100 mg/L, the CSNPs-TiO2@SiNPs composite showed significantly higher dye degradation efficiency compared to individual CSNPs, TiO2 and SiNPs indicating that both CSNPs and SiNPs enhance the photocatalytic activity of TiO2. Moreover, the CSNPs-TiO2@SiNPs composite demonstrated a remarkable degradation efficiency of 99.998% for methylene blue within just 1 minute.
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References
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