Formaldehyde degradation experiment chamber, experimental method and application for degrading formaldehyde by using photocatalyst

Abstract

The invention relates to a formaldehyde degradation experiment chamber, an experimental method and an application for degrading formaldehyde by using a photocatalyst and belongs to the technical field of environmental protection. The formaldehyde degradation experiment chamber comprises an experiment chamber, an air pump, a needle valve and a buffer container; a small-size fan, an exhaust port, a fluorescent tube and a carrier are arranged in the experiment chamber; the air pump is connected with the needle valve, the buffer container, the control valve and the experiment chamber in turn through a pipeline. The experiment chamber has a simple structure and is convenient for an application experiment of degrading formaldehyde by using the photocatalyst. In an airtight space, the initial value of formaldehyde is not above 1.5mg / m<3>, the concentration of the photocatalyst is controlled within 0.1-0.5mg / m<3>, the temperature and humidity in the airtight space are identical to each other, a fluorescent tube is used as a light source for irradiating, the degradation rate of formaldehyde within 2h under the existence of Cu-TiO2 photocatalyst is 57.3%, the degradation rate of formaldehyde within 2h under the existence of SO4-modified Co-TiO2 photocatalyst is 58.7% and the degradation rate of formaldehyde within 2h under the existence of CdxMn1-xS photocatalyst is 57.8%; the degradation rate of formaldehyde within 10h is above 95%; the preparation method for the photocatalyst is simple in process, high in doping efficiency, low in cost and suitable for indoor air treatment.

Description

technical field [0001] The invention relates to a formaldehyde degradation experimental cabin, an experimental method and an application of using a photocatalyst to degrade formaldehyde [0002] , which belongs to the field of environmental technology. Background technique [0003] Photocatalytic technology is an emerging research field that has gradually developed with the rise of nanotechnology since the 1970s. Affect TiO 2 The catalyst performance factors mainly include particle size and surface area, mixed crystal effect and crystal phase defects. to TiO 2 After doping modification, it can not only capture photogenerated electrons and holes, but also expand its light absorption wavelength range, thereby improving the photon quantum efficiency. TiO 2 Doping modification mainly includes doping transition metal elements, nonmetals and rare earth metal elements. Transition metal elements can have a variety of valences, in TiO 2 Doping a small amount of transition meta...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low doping efficiency, complex process, high cost, poor universality and low activity of the finished catalyst in the prior art, the present invention provides a formaldehyde degradation experimental cabin, experimental method and application of photocatalyst to degrade formaldehyde , the structure of the experimental cabin is simple, and the application experiment of using photocatalyst to degrade formaldehyde is very convenient

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