Iron porphyrin/bismuth tungstate composite photocatalytic material and preparation method thereof

Abstract

The invention discloses an iron porphyrin / bismuth tungstate composite photocatalytic material and a preparation method thereof. The composite photocatalytic material includes iron porphyrin and bismuth tungstate, wherein the iron porphyrin is loaded on the bismuth tungstate. The preparation method includes dissolving iron porphyrin in a mixed solution of acetonitrile and dimethyl sulfoxide to obtain an iron porphyrin solution, and dissolving bismuth tungstate into the iron porphyrin solution to obtain a mixed solution of bismuth tungstate and iron porphyrin. , adjust the pH value of the mixed solution of bismuth tungstate and iron porphyrin, let it stand, and prepare an iron porphyrin / bismuth tungstate composite photocatalytic material. The composite photocatalytic material of the present invention has the advantages of good dispersion, strong stability, and easy recycling and reuse. It is an environmentally friendly composite photocatalytic material with excellent photocatalytic performance that can be widely used. Its preparation method has reaction conditions. It has the advantages of mildness, simple process, and environmental protection, and can be used for large-scale preparation.

Description

technical field [0001] The invention belongs to the field of functional materials, and relates to a bionic substance / semiconductor composite photocatalytic material and a preparation method thereof, in particular to an iron porphyrin / bismuth tungstate composite photocatalytic material and a preparation method thereof. Background technique [0002] With the rapid development of the economy, energy and environmental issues have become increasingly prominent, and the search for technologies and materials for the development of new energy has become an important topic of global concern. Solar energy has become a new energy source that has attracted much attention due to its clean, economical, and renewable advantages. Semiconductor photocatalytic materials are one of the most promising materials for developing solar energy. TiO2 is still the most studied and widely used semiconductor photocatalytic material so far. Although titanium dioxide has high photocatalytic activity, it...

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Problems solved by technology

Iron porphyrin, also known as hemin, a complex composed of protoporphyrin IX iron (III), is a homogeneous metalloporphyrin catalyst with good electron conductivity, and has good potential in the field of surface modified semiconductors However, because iron porphyrin is difficult to separate, recover and reuse from the reaction system, and it is easy to self-polymerize during the reaction process, the electron conduction rate decreases, which restricts its practical application in the field of photocatalysis.

In addition, the current surface modification method for bismuth tungstate is mainly the hydrothermal method, but the hydrothermal method often adopts the ordinary conduction heating method, which has the disadvantages of slow heating rate, long reaction time, uneven heat distribution, and large temperature gradient. Shortcomings, and surface modification by hydrothermal method is easy to destroy the crystal form of bismuth tungstate, affecting the properties of synthetic materials

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