Air purification wall

Abstract

The invention relates to an appliance for the continuous photocatalytic purification of the air in a room, said appliance preferably being in the form of a wall (1) and comprising an external steel structure, an opening (11) for the admission of the air to be processed, an internal metallic framework (4) to which a plurality of UVA lamps (3) are fixed, a photocatalytic filter (2), and an opening (12) for discharging the purified air. The inventive appliance is characterised in that the photocatalytic filter comprises at least one metal grating (2) covered by a film containing titanium dioxide (TiO2 ), mainly in an anatase phase, in order to maximise the surface of the photocatalyst illuminated by the UVA light.

Description

technical field [0001] [01] The present invention relates to an air purification device, which works on the principle of heterogeneous photocatalysis when in contact with titanium dioxide, preferably in the form of a wallboard. [0002] [02] The invention also relates to an air reduction method implemented by said device. Background technique [0003] [03] As a result of research on the phenomenon of photoinduced water splitting, heterogeneous photocatalysis has been recognized since the 1970s. This technique consists in performing irradiation on a semiconductor (usually titanium dioxide) with natural sunlight or artificial UV light sources (λ<400 nm). The semiconductor material will be excited, which will make the valence band electrons e - Excited into the conduction band of the semiconductor (reduction process). The corresponding hole h + (Oxidation) will react with the OH group adsorbed on the surface of the semiconductor so as to form a highly oxidative hydroxyl ...

AI Technical Summary

Problems solved by technology

[0012] [08] However, devices according to the prior art provide little or no assistance in meeting the following requirements:

[0013] - The incorporation of an air cleaner into a building element requires, firstly, that the components have satisfactory structural mechanical properties, and secondly, a high compactness in terms of depth, which is due to the arrangement of the UV lamps in the correct orientation unattainable;

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