Photodegradation under UV Light Irradiation of Various Types and Systems of Organic Pollutants in the Presence of a Performant BiPO4 Photocatalyst

Abdessalam Bouddouch (1, 2, 3) , Brahim Akhsassi , Elhassan Amaterz (1, 4) , Bahcine Bakiz (1) , Aziz Taoufyq (1) , Sylvie Villain (2, 5) , Frederic Guinneton (2) , Abdelaziz El Aamrani , Jean-Raymond Gavarri (2) , Abdeljalil Benlhachemi (6)

1 Laboratoire Matériaux et Environnement - LME (Agadir, Morocco)
2 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence
3 LRCS - Laboratoire réactivité et chimie des solides - UMR CNRS 7314
4 ITheMM - Institut de Thermique, Mécanique, Matériaux
5 UTLN UFR ScT - Université de Toulon - UFR Sciences et Techniques
6 Université Ibn Zohr [Agadir]

In this study, we prepared spheroid microstructures of monoclinic bismuth phosphate BiPO4 by a facile solid-state reaction at 500 degrees C. The crystal structure was refined using the Rietveld method, where the crystal cell was resolved using a monoclinic system (parameters a, b, c, beta) with space group P2(1)/n. SEM images showed that the solid catalyst presented homogeneous morphologies. These BiPO4 microparticles (BiP-500) have been used as photocatalysts to photodegrade, under UV light irradiation, three cationic dyes (Rhodamine B, RhB; Methylene Blue, MB; and Toluidine Blue, TB), three anionic dyes (Congo Red, CR; Orange G, OG; and Methyl Orange, MO) and mixtures of RhB-MB, RhB-OG and MO-OG organic dyes. The photodegradation efficiency of these BiP-500 microparticles is found to be optimal in the case of RhB solutions, RhB-MB and RhB-OG binary mixtures. The BiP-500 catalyst shows a high selectivity for the conversion of the mixture of dyes into CO2 and H2O. Total organic carbon analysis of an anionic dye and a cationic dye (RhB, OG and RhB-MB) confirms the mineralization of the pollutants in the presence of BiP-500 particles. The photocatalytic efficiency of our BiP-500 photocatalyst has been confirmed, with a view to facilitate applications in the field of the depollution of wastewater in the agricultural environment by the degradation of parathion-methyl (PM) as a pollutant.

Domaines: Matériaux

Abdessalam Bouddouch, Brahim Akhsassi, Elhassan Amaterz, Bahcine Bakiz, Aziz Taoufyq, et al.. Photodegradation under UV Light Irradiation of Various Types and Systems of Organic Pollutants in the Presence of a Performant BiPO4 Photocatalyst. Catalysts, 2022, 12 (7), ⟨10.3390/catal12070691⟩. ⟨hal-03749829⟩