A photocatalytic reaction plate and its preparation method and application

Abstract

The invention discloses a photocatalytic reaction plate, which comprises at least two layers of carriers, and the top layer is loaded with GR / PPy / TiO 2 , the bottom layer loads GR / PPy; the ecological floating bed is composed of floating tubes fixed around the photocatalytic reaction plate; the floating tubes are open at both ends, filled with soil, and there are several nozzles for planting aquatic plants on the top. The photocatalytic plate uses CNT activated by PE sponge as the carrier, and the upper layer is loaded with TiO 2 / PPy / GR is used as a photocatalytic anode, and the lower layer of GR / PPy is immersed in water as a biocathode; the sponge structure of CNT is a microbial attachment film, and the photogenerated electrons generated by sunlight irradiation are transferred to the biocathode through GR / PPy with good conductivity; The metabolic activity of microorganisms on the cathode is enhanced, and the removal effect of nitrogen-containing pollutants in water is improved; the base soil and plant roots can absorb pollutants in water, and the treatment effect of the entire ecological floating bed on pollutants is improved, which is clean, energy-saving and efficient features.

Description

technical field [0001] The invention relates to a photocatalytic reaction plate, in particular to a photocatalytic reaction plate and its preparation method and application, and belongs to the technical field of river ecological restoration. Background technique [0002] The application of photocatalytic technology to the field of environmental protection mainly uses electrons in semiconductor materials to be excited by light sources to transition to the conduction band, forming electron-hole pairs, and using their redox ability to remove pollutants. It is a green and economical technology. [0003] Graphene has outstanding thermal conductivity and mechanical properties. Aiming at the problem of low photon quantum efficiency of photocatalysts, the compounding of graphene and certain photocatalytic materials can reduce the bandgap width to a certain extent and increase the responsiveness to visible light. For the problem of easy recombination of photogenerated electrons and ...

AI Technical Summary

Problems solved by technology

[0006] (1) Photocatalysts have poor response to visible light, low photon quantum efficiency, easy recombination of photogenerated electrons and holes, and unstable photocatalytic effect;

[0007] (2) The placement structure design of the photocatalytic material is unreasonable, so that the photocatalyst part in the ecological floating bed cannot receive a large area of ​​light, resulting in a low effect of photocatalysis on the removal of pollutants;

[0008] (3) There are few studies on the combination of ecological floating bed and microbial electrochemistry;

[0009] (4) The structural design of the ecological floating bed is unreasonable, the stability and suspension performance are poor, and manual operation is required, and a large amount of manpower is required for daily operation and maintenance

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