A solar-light driven h-WO₃/2H-WS₂-microalgae derived photocatalyst for rapid multi-dye degradation

Area of Science:

• Materials Science: Development of novel composite photocatalysts.
• Environmental Science: Application in wastewater treatment and pollutant degradation.

Background:

• Photocatalysis is crucial for environmental remediation.
• Tungsten-based materials show promise but require improved performance and stability.
• Microalgae surfaces offer unique platforms for catalyst integration.

Purpose of the Study:

• To fabricate and characterize a novel composite photocatalyst: DE-h-WO3/2H-WS2 (DE-WSxOy).
• To evaluate its photocatalytic efficiency for solar-driven degradation of pollutants.
• To explore its potential for industrial wastewater treatment.

Main Methods:

• Synthesis of h-WO3/2H-WS2 (WSxOy) integrated onto nanostructured diatomaceous earth (DE) microalgae.
• Characterization using various techniques (morphology, surface chemistry, interface interactions, photochemical properties).
• Photocatalytic degradation experiments using Rhodamine B (Rh B) and industrial wastewater.

Main Results:

• Successful fabrication of the novel DE-WSxOy photocatalyst.
• Achieved 99.8% decoloration efficiency for Rhodamine B.
• Demonstrated enhanced photocatalytic activity compared to WSxOy alone due to synergistic effects.
• Showcased excellent degradation efficiency for multiple dyes and industrial wastewater.

Conclusions:

• The DE-WSxOy composite is a highly efficient solar-driven photocatalyst.
• The DE support enhances adsorption, dispersibility, stability, and catalytic sites.
• This material shows significant potential for industrial wastewater treatment and next-generation photocatalyst development.