|
Author(s): |
Hai-feng Chen, Department of Chemistry, Huzhou Teachers College, Huzhou Teachers Coll, Huzhou, Peoples R China
Guo-xiang Pan, Department of Chemistry, Huzhou Teachers College, Huzhou Teachers Coll, Huzhou, Peoples R China
Min-hong Xu, Department of Chemistry, Huzhou Teachers College, Huzhou Teachers Coll, Huzhou, Peoples R China
Pei-song Tang, Department of Chemistry, Huzhou Teachers College, Huzhou Teachers Coll, Huzhou, Peoples R China
Feng Cao, Department of Chemistry, Huzhou Teachers College, Huzhou Teachers Coll, Huzhou, Peoples R China |
|
Abstract: |
A novel method has been developed to sensitize BiVO4 photocatalyst by sonochemical method for improving its visible light photocatalytic activity in this study. Containing Bi (NO3)3 ? 5H2O in dilute aqueous solution of nitric acid solution and NH4VO3 as reactants, BiVO4 nucleated and grown under the ultrasound while simultaneous adsorption of Cobalt phthalocyanine tetrasulfonate (CoPcTs) as sensitizing agent. The CoPcTs/BiVO4 photocatalyst was characterized by X-ray diffraction (XRD), laser particle size analyzer, scanning electron microscopy (SEM) diffuse reflectance spectroscopy (DRS) and UV–vis spectrophotometer techniques. The results show that: the XRD patterns demonstrated that BiVO4 was monoclinic phase structure, grain size of about 30 nm; the laser particle size analyzer counted the size distribution coefficient of 0.631; its optical absorption increased between 300 nm - 500 nm; the SEM pictures illustrated particles together more obvious and the surface of secondary particles had much porous; the photocatalytic decolorization rate was at least 1 fold higher than non-sensitized photocatalyst; ultrasound 2 hours preparation of the photocatalyst, 70 mins after the decolorization rate of close to 100%; enhancing the catalytic effect of visible light was from the synergies after sensitization and it may be one reason that the existence of porous on sensitized surface.
|