Er-Fe2O3/BiVO4 photocatalyst for degrading rhodamine B and preparation method thereof

Abstract

The invention discloses an Er-Fe2O3 / BiVO4 photocatalyst for degrading rhodamine B and a preparation method thereof. The method comprises the following steps of: (1) preparation of an Er-Fe2O3 precursor; (2) preparation of Er-Fe2O3; and (3) preparation of Er-Fe2O3 / BiVO4; the Er-Fe2O3 / BiVO4 photocatalyst is prepared through the three steps, the Er-Fe2O3 / BiVO4 photocatalyst is obtained by conducting composite modification on Er-doped Fe2O3 with a narrow forbidden bandwidth and BiVO4, more electrons and holes are generated, and the photocatalytic activity is remarkably improved. Er is doped into Fe2O3, so that the light absorption range of Fe2O3 can be expanded, the carrier excitation capability is improved, meanwhile, Er can become a carrier capture trap, the service life of Er can be prolonged, and the photocatalytic activity can be improved.

Description

technical field

[0001] The present invention relates to photocatalyst material, be specifically related to a kind of Er-Fe that is used for degrading Rhodamine B 2 o 3 / BiVO 4 photocatalyst material. Background technique

[0002] As the main source of water pollution, the environmental pollution caused by industrial dye wastewater has attracted more and more attention. Triphenylmethane dyes are widely used as industrial dyes due to their bright color, high color fixation rate, and good color fastness, and they are used in large amounts. However, this kind of dye wastewater has become one of the wastewater that needs to be treated urgently at this stage due to its high chroma, strong toxicity, refractory degradation, and easy carcinogenicity. For example, rhodamine B dyes are carcinogenic and mutagenic. This type of wastewater has deep chroma, high content of organic pollutants, and poor biodegradability. It is difficult to treat with conventional methods such as physical...

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