MgO has a high energy band gap (7.1 eV) and is supposed to not be capable of acting as a photocatalyst. So how does this happen??
Dear Bakhtyar K. Aziz,
maybe this publication is interesting for you and you have the opportunity to find your answer.
Date pits extracts assisted synthesis of magnesium oxides nanoparticles and its application towards the photocatalytic degradation of methylene blue
these following 2article would give you some helps
Template-free synthesis of MgO nanoparticles for effective photocatalytic applications - ScienceDirect https://www.sciencedirect.com/science/article/pii/S0032591013005937?via%3Dihub
Synthesis and applications of nano-MgO and composites for medicine, energy, and environmental remediation: a review | SpringerLink https://link.springer.com/article/10.1007%2Fs10311-021-01299-4
Dear Bakhtyar K. Aziz, I think your repoted value of Eg is much higher than the most common ones. The synthesis techniques and protocols highly influence the Eg values. Please check the following RG free access documents. My Regards
https://www.researchgate.net/publication/337820959_Synthesis_Characterization_and_antibacterial_activity_of_Magnesium_Oxide_MgO_nanoparticles
https://www.researchgate.net/publication/235645063_Band_Gap_Energies_of_Magnesium_Oxide_Nanomaterials_Synthesized_by_the_Sol-Gel_Method
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