研究目的
Investigating the photocatalytic properties of TiO2-SiO2 nanocomposite xerogels synthesized by the sol-gel method.
研究成果
TiO2-SiO2 nanocomposite xerogels were successfully synthesized by the sol-gel method and characterized. The materials exhibited amorphous nature and showed potential for improved photocatalytic activity compared to pure TiO2 and SiO2, attributed to the formation of Ti-O-Si bonds and increased surface area.
研究不足
The study focuses on the synthesis and characterization of TiO2-SiO2 nanocomposite xerogels but does not extensively explore the optimization of photocatalytic activity or the scalability of the synthesis process.
1：Experimental Design and Method Selection:
The xerogels were synthesized by the Sol-Gel process using metal alkoxide as a precursor source. TTIP was used as a precursor and TEOS was added as an organic solvent. HCl and NaOH were used as catalysts.
2：Sample Selection and Data Sources:
TEOS (Tetraethylorthosilicate) and TTIP (Titanium tetra isopropoxide) were used as precursors. The synthesis involved two steps: the synthesis of SiO2 sol and TiO2 sol, which were then mixed to form a homogeneous sol.
3：List of Experimental Equipment and Materials:
FTIR spectrometer, XRD, UV and LLS for characterization. TEOS, TTIP, methanol, DIW, HCl, and NH4OH were used in the synthesis.
4：Experimental Procedures and Operational Workflow:
The sol was prepared by mixing TEOS and methanol, adjusting the pH with HCl, and stirring to homogeneity. TiO2 sol was prepared similarly, and both sols were mixed, with NH4OH added to adjust pH. The mixture was stirred to form a gel, which was then converted to xerogel by heating.
5：Data Analysis Methods:
The synthesized materials were characterized by FTIR, XRD, UV, and LLS to determine their structure, quality, and photocatalytic properties.
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