Titanium dioxide photo-catalytic micro-reactor

Abstract

The invention discloses a titanium dioxide photo-catalytic micro-reactor, characterized in that in the reactor, the lower ends of fibers are supported on a porous glass sand separator through a porous glass sheet, the upper end is fixed with a translucent sheet, the bottom of the reactor is provided with an air inlet pipe, and the side of the reactor is provided with a testing port and an injection port. According to the invention, the ratio of effective catalytic surface area to reactive volume is raised, the incident mode of a light source is changed into an internal reflection mode from a traditional external reflection mode, thus the attenuation after the light passes through the solution is reduced, and the utilization rate of the light is raised; compared with TiO2 nano-particles, the TiO2 nanotubes used as the photoreaction catalyst have higher catalysis catalysis effect; and compared with traditional coating modes, the reaction layer obtained by the catalyst layer of the photoreaction unit is more uniform, compact and firm.

Description

technical field [0001] The invention relates to a high-efficiency TiO 2 A photocatalytic microreactor belongs to the technical field of chemical engineering equipment design. Background technique [0002] Since Fujishima and Honda discovered TiO in 1972 2 Since electrode photoinduced water splitting, TiO 2 The various unique properties exhibited make it favored in many research fields. TiO 2 The well-known advantages of photocatalytic activity, high stability, non-toxicity and easy acquisition make it the most potential photocatalytic material. In particular, in 1998, Kasuga first synthesized TiO by concentrated NaOH heat treatment. 2 Since nanotubes, like the nanotube revolution triggered by the discovery of carbon nanotubes by Iijima of NEC in 1991, the new effects brought by the new structure have excited many researchers. TiO 2 The research and application of nanotubes have made rapid progress in many fields, especially in the field of photocatalysis. [0003] Howe...

AI Technical Summary

Problems solved by technology

[0003] However, currently the TiO 2 The development of photocatalytic reactors is seriously lagging behind that of TiO 2 The research and development of photocatalysts restrict TiO 2 Practical applications in the field of photocatalysis

Conventional photoreactors based on TiO 2 The existence forms in the reaction system are divided into fixed type (such as liquid film reactor, fixed packed composite bed photocatalytic reactor, etc.) and suspension type (such as fluidized bed photocatalytic reactor, photocatalytic and membrane separation Chemical reactors, photocatalytic and magnetic separation reactors, etc.), although fixed reactors solve the problem of catalyst recovery and reuse, but have a small effective catalytic area, attenuation of light passing through the reaction solution, and low light utilization efficiency. High, low mass transfer efficiency and other issues

Although the suspension reactor improves the effective utilization area and catalytic effect of the catalyst through the suspension and dispersion of the catalyst, it has disadvantages such as difficult recovery of the catalyst, troublesome post-processing, poor reusability, or complicated equipment.

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