Preparation of TiO2-SiO2 via sol-gel method: Effect of Silica precursor on Catalytic and Photocatalytic properties

11th Joint Conference on Chemistry in Conjunction with the 4th Regional Biomaterials Scientific Meeting

材料科学;化学;生物科学

Fatimah, I.^1

Chemistry Department, Universitas Islam Indonesia, Kampus Terpadu UII, Jl. Kaliurang Km 14, Sleman, Yogyakarta

55584, Indonesia^1

关键词: Band gap energy;    Different surface morphologies;    Diffuse reflectance-UV-vis;    Phenol hydroxylation;    Photocatalytic property;    Silica precursors;    Tetra-ethyl-ortho-silicate;    Titanium Isopropoxide;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/172/1/012025/pdf
DOI  :  10.1088/1757-899X/172/1/012025

来源: IOP

【 摘 要 】

TiO2-SiO2have been synthesized by the sol-gel method from titanium isopropoxide and varied silica precursors: tetraethyl orthosilicate and tetra methyl ortho silicate. To study the effect of the precursor, prepared materials were characterized by X-ray diffraction, scanning electron microscopy, Diffuse Reflectance UV-vis optical absorption, and also gas sorption analysis. XRD patterns showed the formation of TiO2anatase in the TiO2-SiO2composite with different crystallite size from different silica precursor as well as the different surface morphology. The DRUV-vis absorption spectra exhibit similar band gap energy correspond to 3.21eV value while the surface area, pore volume and pore radius of the materials seems to be affected by the precursor. The higher specific surface area contributes to give the enhanced activity in phenol hydroxylation and methylene blue photodegradation.