Br <->-induced oxygen vacancy-rich BiOCl photocatalyst and preparation method thereof

Abstract

The invention relates to the technical field of photocatalysts, in particular to a Br <->-induced BiOCl photocatalyst rich in oxygen vacancies and a preparation method of the Br <->-induced BiOCl photocatalyst rich in oxygen vacancies. The preparation method comprises the following steps: dissolving Bi (NO3) 3.5 H2O in deionized water, and uniformly stirring to obtain a solution A; dissolving KCl and KBr powder in deionized water, and uniformly stirring to obtain a solution B; adding the solution B into the solution A, then adding a certain proportion of ethylene glycol, and continuously stirring to form a mixed solution; putting the mixed solution into a reaction kettle for hydrothermal reaction, and taking out a crude product after the reaction is completed; and cooling the crude product to room temperature, washing and drying to obtain the Br <->-induced BiOCl photocatalyst rich in oxygen vacancies. The Br <->-induced BiOCl photocatalyst rich in oxygen vacancies is prepared by a hydrothermal method, and has extremely high photocatalytic performance; the removal rate of Hg < 0 > reaches 90%; the method has great application potential in the aspect of removing mercury in coal-fired flue gas through photocatalysis.

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