Structural, Optical, Morphological and Microbial Studies on SnO₂ Nanoparticles Prepared by Co-Precipitation Method

Area of Science:

• Materials Science
• Nanotechnology
• Solid State Physics

Background:

• Tin oxide (SnO2) is a semiconductor material with diverse applications.
• Controlling nanoparticle properties through synthesis temperature is crucial for optimizing performance.
• Understanding the relationship between synthesis conditions and material characteristics is vital.

Purpose of the Study:

• To synthesize tin oxide (SnO2) nanoparticles using the co-precipitation method at varying temperatures (500 °C, 700 °C, 900 °C).
• To investigate the structural, optical, magnetic, morphological, and microbial properties of the synthesized SnO2 nanoparticles.
• To correlate the observed properties with the sintering temperatures.

Main Methods:

• Co-precipitation method for nanoparticle synthesis.
• X-ray Diffraction (XRD) for structural and crystallinity analysis.
• Optical absorption measurements for band gap determination.
• X-ray Photoelectron Spectroscopy (XPS) for compositional analysis.
• Vibrating Sample Magnetometry (VSM) for magnetic property assessment.
• Microbial activity assays for antibacterial and antifungal evaluation.

Main Results:

• XRD confirmed a tetragonal crystal structure, with increased crystallinity and crystal size at higher sintering temperatures.
• Morphological studies showed randomly arranged, compact grains, with grain size increasing with temperature.
• Optical band gap was measured at approximately 4.3 eV for SnO2 nanoparticles sintered at 500 °C, higher than bulk SnO2 (3.78 eV).
• Room temperature M-H curves indicated ferromagnetic behavior in pure SnO2 nanoparticles.
• The synthesized tin oxide nanoparticles demonstrated significant bacterial and fungal activity.

Conclusions:

• Sintering temperature significantly influences the structural, optical, and morphological properties of SnO2 nanoparticles.
• The observed optical and magnetic properties suggest potential applications in optoelectronics and spintronics.
• SnO2 nanoparticles exhibit promising antimicrobial activity, indicating their potential as biocidal agents.