Synthesis of g-C3N4/N-doped CeO2 composite for photocatalytic degradation of an herbicide

• Main Authors: Mohan Kumar Kesarla, Manuel Octavio Fuentez-Torres, Manuel Antonio Alcudia-Ramos, Filiberto Ortiz-Chi, Claudia Guadalupe Espinosa-González, Miguel Aleman, Jose Gilberto Torres-Torres, Srinivas Godavarthi
• Format: Article
• Language: English
• Published: Elsevier 2019-04-01
• Series: Journal of Materials Research and Technology
• Online Access: http://www.sciencedirect.com/science/article/pii/S2238785418307075

In photocatalysis, surface engineered CeO2 could be vital due to oxygen vacancies arise from multiple valency, i.e. Ce3+ and Ce4+. This study reports photocatalytic properties of g-C3N4/CeO2 composite synthesized by a facile method in the presence of l-arginine. Physicochemical properties of g-C3N4/CeO2 material were analyzed through various characterization techniques such as XRD, UV–Vis, physisorption, etc., and correlated with its photocatalytic activity. Observed bandgap of the synthesized composite material was in the visible region, around 2.8 eV which is less than that of typical ceria, but higher than bandgap of exfoliated g-C3N4. On the further side, N doping into CeO2 was confirmed through XPS analysis. It is estimated that synthesis method aided for the N doping, which further played key role in lowering the bandgap of g-C3N4/CeO2 composite. Finally, Photocatalytic activity of g-C3N4/CeO2 composite was analyzed through degradation of an herbicide i.e. diuron, and the study revealed the good performance of the catalyst. Keywords: CeO2, Graphitic carbon nitride, Photocatalysis, N doping, Herbicide