Semiconductor porous bismuth oxide nanosphere and preparation method and application thereof

Abstract

The invention relates to a preparation method for a visible-light-responsive photocatalytic semiconductor material. The semiconductor material is a nanosphere with a uniform porous structure, a uniform size, good dispersibility and a diameter of 60 to 120 nm. A preparation method for the semiconductor material comprises the following steps: 1) preparing a solution from a bismuth source and deionized water and adding a surfactant into the solution; 2) adding hydrogen peroxide into a mixed solution obtained in step 1), transferring an obtained solution into a reaction vessel and carrying out a reaction so as to obtain an earthy yellow precursor solution; 3) subjecting the obtained precursor solution to natural cooling at first and then to washing and carrying out drying with a baking oven; and 4) uniformly grinding a precursor obtained after drying and calcining the ground precursor in a tubular furnace. The invention has the following beneficial effects: as a material for degradation of pollutants, the semiconductor material shows excellent degradation performance, a narrow energy band gap and good cycling stability. The preparation method is simple, accords with requirements for green chemistry and is beneficial for market popularization.

Description

technical field [0001] The invention belongs to the field of nanometer materials and photocatalysis, and in particular relates to a preparation method of a visible light responsive nanometer photocatalytic semiconductor material. The photocatalytic material can be used to degrade pollutants under visible light. Background technique [0002] With the progress of society and the rapid development of economy, the pollution of the environment is becoming more and more serious. Semiconductor photocatalytic materials have attracted much attention because of their potential applications in converting sunlight energy and degrading pollutants. Since Fujishima and Honda reported on Nature in 1972 that TiO 2 Since single crystals can be used as electrodes to photodecompose water to produce hydrogen at room temperature, semiconductor photocatalytic materials have attracted the attention of researchers. At present, research on the more mature semiconductor materials, TiO 2 、 Ta 2 o 5...

AI Technical Summary

Problems solved by technology

However, due to the low melting point of bismuth, it is not easy to synthesize by gas phase method, and there are relatively few sources of bismuth, generally only Bi(NO 3 ) 3 ·5H 2 O and BiCl 3 And it is easy to hydrolyze, difficult to dissolve in aqueous solution, and difficult to synthesize by liquid phase method, so it is difficult to efficiently prepare Bi by traditional gas-solid-liquid method. 2 o 3 , so that Bi 2 o 3 There are relatively few synthetic routes with controllable morphology, size and crystal form of nanomaterials

And Bi 2 o 3 More inclined to self-nucleation, easy to generate sheet-like structure

Currently, there is no Bi 2 o 3 Reports on Spherical Nanostructures

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