Two-dimensional hexagonal boron nitride (h-BN) decorated on CeO2 heterojunction nanocomposite for improved photocatalysis degradation and antibacterial application

Two-dimensional (2D) materials have demonstrated remarkable capabilities as photocatalysts compared to their bulk versions. This research work meticulously describes the CeO₂-h-BN heterojunction nanocomposites prepared via the liquid phase exfoliation method. The findings from the physicochemical analysis indicate the formation of a nanocomposite phase, accompanied by assessments of vibrational, optical, and surface elemental mapping. The photocatalytic properties of the prepared CeO₂-h-BN nanocomposite were examined through the photodegradation of the organic dye methylene blue when exposed to UV–visible light. The photocatalysis measurements of CeO₂, 58 % h-BN 49 %, compared to CeO₂-h-BN nanocomposites exhibited outstanding efficiency in dye degradation, achieving an impressive maximum of 93 % after exposure to visible light for 140 min. Additionally, CeO₂-hBN nanocomposites show antibacterial properties against both Gram-positive and Gram-negative bacteria. These results highlight the promising possibilities of CeO₂-hBN nanocomposites for numerous applications, warranting further research and exploration.