Catalyst-free biphasic orthorhombic/hexagonal tungsten oxide system with enhanced photocatalytic response under visible light

Abstract These days, textile industries pose a more significant threat to surface water and groundwater sources directly or indirectly by discharging wastewater containing various dyes organic pollutants these sources. The phase-junction-engineered heterogeneous photocatalysis carried out visible light-driven semiconductor photocatalysts is opening new window for the degradation of environmental pollutants. In this work, we have reported one-step bottom-up hydrothermal synthesis biphasic tungsten oxide (o/h-WO3) performed photodegradation experiment under light irradiation efficient such as Methylene blue (MB) Methyl violet (MV), respectively. X-ray diffraction, RAMAN, transmission electron microscopy ultraviolet–Vis characterization techniques were used investigate structural, morphological optical properties as-synthesized o/h-WO3. Moreover, low calculated band gap (∼2.8 eV) anionic nature o/h-WO3 suggest it an photocatalyst suitable photocatalysis. using showed better efficiency 71% 89% MB MV, respectively, in 100 min. followed first-order kinetics, their kinetic rate constants Langmuir–Hinshelwood model. Furthermore, recyclability study was also discussed underlying mechanism dyes.