Plasma metal Bi/oxygen vacancy-BiOBr photocatalytic material as well as preparation method and application thereof

The invention discloses a plasma metal Bi/oxygen vacancy-BiOBr photocatalytic material and a preparation method and application thereof.The preparation method of the material comprises the following steps that bromine salt is dissolved in 1, 2-propylene glycol to obtain dispersion liquid, bismuth salt is added into the dispersion liquid and mixed to be uniform to obtain reaction liquid, the reaction liquid is subjected to a hydrothermal reaction, and the BiOBr/Bi/oxygen vacancy-BiOBr photocatalytic material is obtained. And cooling, separating, washing and drying the material obtained by the reaction to obtain a target product. According to the invention, 1, 2-propylene glycol is used as a solvent and plays a role of a reducing agent, and plasma metal Bi and oxygen vacancy are simultaneously introduced into BiOBr through a hydrothermal reaction so as to improve the catalytic performance of the BiOBr. In addition, after lignin is added into a reaction system, formation of plasma metal Bi and oxygen vacancies c