A kind of modified bismuth acid copper photocatalyst and preparation method thereof

Abstract

The invention discloses a modified copper bismuthate photocatalyst and a preparation method thereof. It is a modified copper bismuthate photocatalyst doped with metal aluminum. The preparation process is to prepare copper nitrate trihydrate, bismuth nitrate pentahydrate and nitric acid nonahydrate Add aluminum to the mixed solution of acetone, glycerol, nitric acid and anhydrous acetic acid, stir to obtain a yellow gel, dry the yellow gel to obtain a dried gel, and then calcinate the dried gel to obtain a modified copper bismuth acid photocatalyst . Through the above method, the preparation method of the present invention is simple and low in cost, and solves the problem that the bismuth-based photocatalytic material cannot be prepared by the sol-gel method. The prepared honeycomb ceramic-supported modified copper bismuth acid photocatalyst has good visible light response performance, and can be used in Various pollutants can be decomposed under the irradiation of visible light.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a modified copper bismuthate photocatalyst and a preparation method thereof. Background technique [0002] Visible light-responsive photocatalytic materials can undergo photodegradation reactions under the action of sunlight, and the active groups generated can remove pollutants. In bismuth-based photocatalytic materials, Bi loses 3 electrons, and the 6s of Bi 2 Orbital due to O 2p Partial overlapping of orbitals forms the top of the valence band in the semiconductor, which reduces the forbidden band width to achieve a good response to visible light wavelengths, and effectively increases the width of the valence band, which is conducive to improving the mobility of holes and reducing the photogenerated current. compound of sons. Copper bismuthate, a common bismuth-based photocatalyst with spinel structure, has no significant photocatalytic activity in the visible light region due...

AI Technical Summary

Problems solved by technology

Among them, the solid-state grinding method and the ion exchange method have the disadvantages of harsh reaction conditions and complicated preparation procedures; the hydrothermal method has the disadvantages of long preparation period and high equipment requirements.

Bismuth nitrate needs to be dissolved under strong acidic conditions, and during the stirring process of the conventional sol-gel method, the acidic substance will volatilize and cause the acidity to weaken, so that the sol will form a precipitate when the gel is not formed, preventing the reaction. proceed further

At present, there is no report on the preparation of copper bismuthate photocatalytic materials by sol-gel method

Images