Multiple-shell ZnSe core-shell spheres and their improved photocatalytic activity.

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Zinc selenide (ZnSe) is a semiconductor with potential applications in optoelectronics and catalysis.
• Developing efficient synthesis methods for nanostructured ZnSe is crucial for enhancing its performance.
• Core-shell structures offer unique properties due to their controlled morphology and composition.

Purpose of the Study:

• To synthesize multiple-shell ZnSe core-shell microspheres on a large scale.
• To investigate the structural and optical properties of the synthesized ZnSe.
• To evaluate the photocatalytic activity of the ZnSe core-shell microspheres.

Main Methods:

• Solvothermal synthesis in ethylene glycol (EG) assisted by ethylene diamine tetraacetic acid (EDTA).
• Characterization using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis absorption spectroscopy, and photoluminescence (PL).
• Photocatalysis experiments using methyl red (MR) as a model pollutant.

Main Results:

• Successful large-scale synthesis of multiple-shell ZnSe core-shell microspheres with zinc-blende structure.
• Detailed structural and morphological characterization confirming the core-shell architecture.
• Demonstrated remarkable photocatalytic activity of the synthesized ZnSe microspheres in methyl red degradation.

Conclusions:

• The facile solvothermal method provides an effective route for large-scale production of multiple-shell ZnSe core-shell microspheres.
• The unique core-shell structure contributes to the enhanced photocatalytic performance.
• These ZnSe microspheres show great promise for environmental remediation applications.