Magnetic-control dynamic ciliary bionic photocatalytic array and preparation method thereof

Abstract

The invention provides a magnetic-control dynamic ciliary bionic photocatalytic array and a preparation method thereof. The photocatalytic array can be flexibly bent and rotate under the action of a magnetic field. The preparation method comprises the steps: preparation of the ciliary bionic array, surface modification of the ciliary bionic array and further growth of photocatalytic substances. In a photocatalysis process, the magnetic field rotating at a high speed can drive the ciliary bionic photocatalytic array to carry out high-speed disturbance so as to realize effective and mixed mass transferring in a catalytic system, and due to a fluid shearing force generated by movement of the photocatalytic array, degradation products can be desorbed rapidly and the active positions of the catalytic substances can be exposed in time, so that the photocatalytic array can keep lasting photocatalytic activity. The magnetic-control dynamic ciliary bionic photocatalytic array provided by the invention can carry different photocatalytic substances and can play an important role in the fields of a micro-catalytic reactor and the like.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a magnetically controlled dynamic cilia-like bionic photocatalysis array and a preparation method thereof. Background technique [0002] In recent years, due to the increasingly serious energy and environmental problems worldwide, the use of photocatalytic degradation of pollution for environmental purification is considered to be an environmentally friendly, green and efficient new technology. Compared with the photocatalytic suspension system, the advantage of the photocatalytic thin film is that the photocatalyst is loaded on the carrier, and it can be reused without centrifugation or filtration separation after use. Therefore, the development and application of the photocatalytic thin film has more practical value. At the same time, a large number of studies have supported photocatalysts on substrates such as glass, metal and polymer films. However, there are problems of low sp...

AI Technical Summary

Problems solved by technology

Although this type of technology makes up for the problems of low surface area and low light energy utilization efficiency of photocatalytic films, in use, photocatalytic films are in a static state, and the mass transfer process of pollutants in the photocatalytic system depends on passive diffusion or External stirring, especially the mass transfer process in the nanometer range, is very weak, and photocatalytic reactions often have mass transfer limitations, and pollutants cannot be quickly transferred to photocatalytic active sites for effective degradation; at the same time, photocatalytic reaction degradation The product is competitively adsorbed on the surface of the photocatalytic film, and cannot be effectively desorbed to expose the catalytic active site, thereby reducing the catalytic activity of the photocatalytic film

Images