研究目的
The aim of this study is the synthesis of TiO2 nanoparticles by the sol-gel method and, in particular, how the heat treatment affects the TiO2 nanoparticles crystal phases and their size.
研究成果
The study concludes that an increase in calcination temperature induces the formation of a mixed-phase crystalline system with variable percentages of anatase and rutile. High percentages of rutile negatively affect the nanoparticles size, suggesting the need for fine control of water–precursor molar ratio and treatment temperature to reduce agglomeration and preserve nano size.
研究不足
The study highlights the influence of heat treatment on the size and crystalline phase of TiO2 nanoparticles but does not explore the biological implications of these changes in depth. The synthesis procedure's effect on nanoparticle size is discussed, but further optimization could be explored to reduce agglomeration and preserve nano size.
1：Experimental Design and Method Selection:
The study involved the synthesis of TiO2 nanoparticles using the sol-gel method, focusing on the effects of heat treatment on particle size and crystalline phase. FTIR spectroscopy and XRD were used to evaluate the different structures.
2：Sample Selection and Data Sources:
TiO2 nanoparticles were synthesized and then subjected to different heat treatments to study the effects on their structure and size.
3：List of Experimental Equipment and Materials:
Titanium (IV) butoxide (TBT, Sigma Aldrich), pure ethanol (99.8% Sigma-Aldrich), and distilled water were used. Equipment included a Prestige 21 Shimadzu Fourier transform infrared (FTIR) spectrophotometer, AURIGA Zeiss High Resolution Field Emission equipment (HR-FESEM), and a Philips diffractometer.
4：8% Sigma-Aldrich), and distilled water were used. Equipment included a Prestige 21 Shimadzu Fourier transform infrared (FTIR) spectrophotometer, AURIGA Zeiss High Resolution Field Emission equipment (HR-FESEM), and a Philips diffractometer.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The TiO2 nanoparticles were synthesized by the sol-gel method, then subjected to various heat treatments. The chemical structure and crystalline phases were analyzed after each treatment.
5：Data Analysis Methods:
The content of both anatase and rutile phases was calculated using specific equations based on XRD spectra. SEM images were analyzed to determine particle size and aggregation.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
