Luminescent photocatalytic coating and preparation method thereof

Abstract

The invention relates to luminescent photocatalytic coating and a preparation method thereof. The luminescent photocatalytic coating is novel coating capable of removing the lampblack and the odor. The luminescent photocatalytic coating comprises inorganic coating base basically with dispersed nanoscale photocatalytic titanium dioxide nanotube and rare-earth long-acting noctilucence powder. The luminescent photocatalytic coating comprises the following components: 25 to 65 percent of photocatalytic titanium dioxide nanotube, 5 to 10 percent of long-acting rare-earth noctilucence powder, 15 to 25 percent of pigments, 3 to 5 percent of self-dissolving agent, 2 to 15 percent of dispersing agent, 2 to 5 percent of anti-foaming agent, 1 to 3 percent of sterilizing agent and 3 to 5 percent of calcium carbonate. The photocatalytic titanium dioxide nanotube is prepared in a novel hydrothermal synthesis method, the diameter of the photocatalytic titanium dioxide nanotube is about 5nm to 15nm, the length of the photocatalytic titanium dioxide nanotube is about 100nm, and by adopting the coating, pollutants such as lampblack and harmful gas of NOX compound in the air of a kitchen and a toilet can be resisted. The luminescent photocatalytic coating not only can work at daytime, but also can react at night, and the efficiency of the nano material for purifying the air can be improved.

Description

technical field [0001] The invention relates to a method for preparing nanometer material and its doping in paint, in particular to a method for preparing luminescent titanium dioxide nanotube paint. Background of the invention [0002] Many coatings in the prior art are slightly toxic and difficult to dissolve after hardening. Nanomaterials have a large specific surface area, as well as special pore volume and surface area, so their physical and chemical properties are special, and they have attractive application prospects in the fields of photocatalysis and lithium batteries. Titanium dioxide nanotubes have a wider absorption range for waves than micron-sized titanium dioxide, which is beneficial for photocatalysis. Due to the increasing development of the textile industry and the large increase in water consumption, some enterprises illegally discharge polluted water containing a large amount of organic pollutants, polluted water sources deteriorate the air, and the air...

AI Technical Summary

Problems solved by technology

[0003] Since the band gap of titanium dioxide is 3.12eV, it can only absorb ultraviolet light with a wavelength less than 387nm, which makes the utilization rate of sunlight energy only about 4%, resulting in low light conversion efficiency and greatly restricting industrial applications.

In order to expand the photoresponse range of TiO2, scholars at home and abroad have carried out a lot of modification research on TiO2, such as metal ion doping, noble metal deposition, semiconductor recombination, dye sensitization and non-metal ion doping, etc. Although these methods can make TiO2 The photoresponse area of ​​the photoresponse area produces a red shift, which reduces the bandgap width of TiO2, but the reduction of the bandgap width will reduce the redox potential of photogenerated electrons and holes, resulting in a decrease in photocatalytic performance.