TiO₂-SiO₂ Gel Photocatalytic Degradation of Methylene Blue and Composite Energy Gap Calculation

Abstract:

The objectives of this study were to mix TiO₂ and SiO₂ gel for photo catalyzing in methylene blue and calculated energy gap of TiO₂- SiO₂ gel composite. Nanoparticles of TiO₂-doped SiO₂ gels have been synthesized for use as composites in photodegradation of methylene blue. SiO₂ gel was synthesized by a sol-gel method from rice husk ash. TiO₂ was synthesized by microwave method from TiOSO₄. The composite of TiO₂-SiO₂ was prepared by mixing of 25% wt TiO₂ and 75% wt SiO₂ gel and SiO₂ gel bead. This work can be dived into two kinds of TiO_­2 sources were TiO₂ from microwave synthesis (MW) and TiO₂ from P25. The UV absorption values of methylene blue after used TiO₂-SiO₂ composite were measured. Wavelengths of composites were measured by Uv-vis reflectometer and energy gap were calculated.

• Periodical: Key Engineering Materials (Volume 706)
• Pages: 94-98
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.706.94
• Online since: August 2016
• Authors: Nuchanaporn Pijarn*, Hasan Seng, Tuwaeibroheng Toso, Chanatan Dissong
• Keywords: Energy Gap, Methylene Blue, Photocatalyst, Silica-Titania, TiO₂-SiO₂ Composite

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