Ferriporphyrin/bismuth tungstate composite photocatalytic material and preparation method thereof

Abstract

The invention discloses a ferriporphyrin / bismuth tungstate composite photocatalytic material and a preparation method thereof. The composite photocatalytic material includes ferriporphyrin and bismuth tungstate, wherein the ferriporphyrin is supported on the bismuth tungstate. The preparation method includes the steps of: dissolving the ferriporphyrin in a mixture solution of acetonitrile and dimethylsulfoxide to obtain a ferriporphyrin solution; dissolving the bismuth tungstate in the ferriporphyrin solution to obtain a mixed solution of bismuth tungstate and ferriporphyrin; regulating the pH value of the mixed solution and allowing the mixed solution to stand to produce the ferriporphyrin / bismuth tungstate composite photocatalytic material. The composite photocatalytic material has good dispersibility, is strong in stability and is easy to recycle and reutilize. The photocatalytic material can be widely applied, has excellent photocatalytic performance and is environment-friendly. The preparation method has mild reaction conditions and simple process and is environment-friendly, and can be used in large-scale production.

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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