Method for preparing photochromic WO3 film using malic acid induction

Abstract

The invention discloses a method for preparing a photochromism WO3 film, in particular to a method for preparing the photochromism WO3 film by the action of revulsant-malic acid. The method includes the following steps: a tungstate solution is prepared; tungstenic acid is synthesized after ion exchange; the pH value of the system is adjusted; a stabilizer and a film-forming agent are added; the revulsant is added; metallic-membrane plating and drying are carried out; finally, heat treatment is carried out. The method is simple and the prepared WO3 film can yield a good color changing effect under the condition of excitation light source with low power. Meanwhile, the WO3 film can fade without light, thereby realizing that the revulsant-malic acid is used for preparing the WO3 film with good photochromism performance.

Description

technical field [0001] The invention relates to a method for preparing photochromic WO 3 Thin film method, especially preparation of photochromic WO under the action of inducer malic acid 3 thin film method. Background technique [0002] Under the action of an external excitation source, the phenomenon that a substance or a system undergoes a significant change in color is called discoloration. Photochromism means that when a compound A is irradiated by light of a certain wavelength, a photochemical reaction can occur to obtain a product B, and the colors of A and B (that is, the absorption of light) are obviously different. B can be restored to its original form A under the irradiation of another beam of light or by heating. Photochromic materials were reported as early as 1867. In the following 20 years, scientists began to gradually enter the field of research, but it was not until 1956 that Hirshberg proposed the possibility of photochromic materials being applied to ...

AI Technical Summary

Problems solved by technology

The gasochromic device has more market potential due to its simple structure and wide optical adjustment range, so it has become one of the hotspots in the application research of tungsten oxide thin film chromogenic materials in the near future, but the results of photochromism are rarely reported. In the few photochromic research reports, there are deficiencies in that the photochromic excitation light source is demanding and the color changing effect is lack of clear characterization.