Flower – Like Bi2W1−xMoxO6 (x = 0, 0.5, 1) compounds immobilization on conductor and dielectric surface to create the composite photocatalyst.

• New composite photocatalysts based on Bi 2 W 1-x Mo x O 6 (x = 0, 0.5, 1) powders deposited on a metal mesh and PMMA have been obtained. • A comparative study of their photocatalytic activity was carried out. • The mechanism of MB photooxidation has been studied, the main radical species have been identified. • A pathway for the decomposition of methylene blue has been proposed. New photocatalytic materials based on complex oxides and widely used and cheap carriers (stainless steel mesh and PMMA) have been prepared. The Bi 2 W 1-x Mo x O 6 (x = 0, 0.5, 1) powders were applied on the carrier surface using hydrothermal conditions and melting. The optimal way of the special pre-treatment for stainless steel mesh has been developed. The surface of the PMMA glass was softened to introduce powder particles into it. The morphology and elemental composition of materials were investigated by SEM with X-ray microanalysis. The photocatalytic activity was studied under visible light by methylene blue decomposition. All the obtained catalysts are characterized by the stability of the phase and elemental composition after photocatalysis. The differences in the mechanism of the photodecomposition process for all catalysts were studied experimentally using selective radical scavengers. The possible pathway of MB photooxidation was supposed by HR-LCMS analysis. [ABSTRACT FROM AUTHOR]