Synthesis of heterojunctiontype KBiO3/BiOCl photocatalyst and its visible light driven photocatalytic activities
Potassium bismuthate is an excellent photocatalyst with dis-satisfactory stability.In this research,a heterojunction KBiO3/BiOCl photocatalyst is synthesized via in-situ solid-transformation method on the surface of KBiO3 and used to photo-degrade crystal violet.The results confirm that the in-situ growth of BiOCl improves the stability of KBiO3 and enhances its photocatalytic performance effectively.Crystal violet can be completely photo-decomposed in 90 minutes with KBiO3/BiOCl heterojunction under visible light irradiation,which is better than that with pure KBiO3 or BiOCl.This performance improvement should ascribe to the broadening of light absorption spectrum,suppression of photogenerated electrons and holes recombination because of the constructed KBiO3/BiOCl heterojunction structure,and the increasing of surface area due to the in-situ growth of BiOCl.
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