Study of methylene blue removal and photocatalytic degradation on zirconia thin films modified with Mn-Anderson polyoxometalates.

Recalcitrant pollutants are challenging to degrade during water treatment processes. Methylene blue (MB), a cationic dye, is particularly resistant to degradation and is environmentally persistent. Heterogeneous photocatalysis has emerged as a suitable strategy for removing such pollutants from water.

Adsorption and Photocatalytic Degradation of Methylene Blue on TiO Thin Films Impregnated with Anderson-Evans Al-Polyoxometalates: Experimental and DFT Study.

In this work, we fabricated a TiO thin film, and the same film was modified with an Anderson aluminum polyoxometalate (TiO-AlPOM). Physical-chemical characterization of the catalysts showed a significant change in morphological and optical properties of the TiO thin films after surface modification. We applied the kinetic and isothermal models to the methylene blue (MB) adsorption process on both catalysts.

Kinetic and Thermodynamic Study of Methylene Blue Adsorption on TiO and ZnO Thin Films.

In this work, we fabricated and characterized ZnO and TiO thin films, determining their structural, optical, and morphological properties. Furthermore, we studied the thermodynamics and kinetics of methylene blue (MB) adsorption onto both semiconductors. Characterization techniques were used to verify thin film deposition.

Seed Waste as Biochar for the Removal of Blue Methylene: A Thermodynamic and Kinetic Study.

In this work, we studied the methylene blue (MB) dye adsorption capacity on biochar derived from residues of seed waste, a species found in the region of the tropical dry forest of Piojó in the Department of Atlántico, Colombia. The materials were obtained by pyrolysis at temperatures of 300, 500, and 700 °C. Biochar was characterized using Fourier transform infrared (FTIR), scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDX), TGA, and Brunauer-Emmett-Teller (BET) techniques.