Study On Contamination Monitoring And Protection Of Space Photoelectric Materials

Photoelectric materials will be affected by space debris impact effect, plasmonic effect, irradiation effect, space pollution effect under the effect of space environment. This paper mainly studied the monitoring of space pollution effect, which centering on photoelectric materials. Quartz crystal microbalance（QCM） is an important method of space pollution monitoring. While, water molecules attached on QCM will affect the precision in the detecting process of organic gas molecules. Preparing a nano superhydrophobic film on QCM is a method to reduce the effect of water molecules. Further, the superhydrophobic film persistently exposure in the pollution environment, especially in the application of atmosphere of organic gas molecules, which results in superhydrophobicity declining or even disappearing. Therefore, the cleaning of QCM surface organic pollutants is a problem which must be solved.Photocatalytic materials can effectively degrade the organic pollutants on QCM, The photocatalysis is a solution method for the self-cleaning of organic molecules on QCM in long time service. In this paper, ZnO nanorod array is in-situ prepared on the QCM via hydrothermal process, and surface modified with coated TiO₂ by sol-gel methods to form TiO₂/ZnO composite film. What’s more, the structure, morphology and properties of the films are studied.ZnO nanorod array film is prepared on the QCM via hydrothermal process, the film prepared has excellent superhydrophobic properties and the photocatalytic performance. The film still appears superhydrophobicity after TiO₂ being coated on the surface of ZnO nanorods by sol-gel process. In addition, the TiO₂/ZnO has a better photocatalytic performance.The anatase TiO₂/ZnO nanorod composite film with pencil structure exhibits excellent superhydrophobicity and no-sticking water properties（water contact angle can reach 155°）, which contributes to improving the measure precision of QCM. Under UV irradiation, the TiO₂/ZnO nanorod composite film has a superior self-cleaning property for organic molecules. The anatase TiO₂/ZnO nanorod composite film on QCM appears a higher efficiency of degrading acetone molecules, which is help for realizing self-cleaning of QCM surface. It is stable that the photocatalysis and reversible superhydrophobic and superhydrophilic transition of TiO₂/ZnO nanorod composite films on QCM, which satisfies weatherability in long-term application.