Acoustic-assisted Fabrication, Characterization, and Photocatalytic 
Application of Ni2O3/NiO/rGO Nanocomposites

Document Type

Article

Publication Date

8-27-2024

Abstract

This study introduces an innovative two-step approach to fabricate a high-performance Ni2O3/NiO/rGO nanocomposite photocatalyst. The process synergistically combines solvothermal precursor synthesis with calcination and high-energy ultrasonic irradiation, enabling the in-situ formation of a thin Ni2O3 layer on NiO quasi-sphere nanoparticles anchored to a reduced graphene oxide (rGO) matrix.

The incorporation of rGO significantly enhances charge separation, resulting in a dramatic increase in active surface area from 17.1 m2/g to 131 m2/g, and a substantial improvement in the photocatalytic degradation of the resilient Fluorescein dye—achieving an 81% degradation rate under UV light, compared to 36% with pristine NiO.

Comprehensive characterization, including FTIR, XRD, and XPS analyses, confirmed the NiO-Ni2O3 interface transformation, successful reduction of graphene oxide, and critical interactions between NiO and Ni2O3. This study highlights the promising potential of the Ni2O3/NiO/rGO nanocomposite for environmental remediation, particularly in the degradation of persistent organic pollutants.

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