Unprecedented high photocatalytic activity of nanocrystalline WO3/NiWO4 hetero-junction towards dye degradation: Effect of template and synthesis conditions

摘要

Nanocrystalline N1WO4 wolframite structure has been prepared by a simple salt solution addition (NiW_(1SS)), co-precipitation (NiW_(4Cop)) and sol-gel (NiW_(4SG)) techniques via employing polymeric templates particularly polyethylene glycol (PEG) and triblock copolymer, respectively. The synthesis method as well as the metal molar ratio (W/Ni) influenced the phases, morphology, optical and surface properties of synthesized samples as configured by X-ray diffraction, transmission electron microscopy, UV-vis diffuse reflectance spectroscopy, infrared spectroscopy, X-ray photoelectron spectroscopy and N2 sorp-tiometry techniques.