Study of Zn-Cu ferrite nanoparticles for LPG sensing

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Mixed ferrites are promising materials for gas sensing applications.
• Sol-gel synthesis offers control over nanostructure and properties.
• Developing efficient sensors for liquefied petroleum gas (LPG) is crucial for safety.

Purpose of the Study:

• To synthesize nanostructured zinc-copper mixed ferrite (Zn(1-x)Cu(x)Fe2O4) using the sol-gel method.
• To investigate the structural, morphological, and gas sensing properties of the synthesized materials.
• To optimize the composition and operating conditions for enhanced LPG detection.

Main Methods:

• Sol-gel synthesis was employed to prepare Zn(1-x)Cu(x)Fe2O4 (x = 0.0, 0.25, 0.50, 0.75) samples.
• X-ray diffraction (XRD) was used to analyze the crystal structure and phase purity.
• Scanning Electron Microscopy (SEM) characterized the surface morphology.
• Gas sensing measurements were performed at various temperatures (200-250°C) and LPG concentrations (0.2-0.6 vol%).

Main Results:

• All synthesized samples exhibited a single-phase inverse spinel ferrite structure.
• Crystallite size increased from 28 nm to 47 nm with increasing copper concentration.
• SEM revealed a porous surface morphology across all samples.
• Maximum sensitivity of 55.33% was achieved at 250°C for 0.6 vol% LPG.

Conclusions:

• Nanostructured zinc-copper ferrite synthesized via sol-gel is a viable material for LPG sensing.
• Copper doping and operating temperature significantly influence the gas sensing performance.
• The material demonstrates potential for developing efficient and sensitive LPG detectors.