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首页> 外文期刊>Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion >Development of multifunctional sol–gel coatings: Anti-reflection coatings with enhanced self-cleaning capacity
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Development of multifunctional sol–gel coatings: Anti-reflection coatings with enhanced self-cleaning capacity

机译：多功能溶胶-凝胶涂料的开发：具有增强的自清洁能力的减反射涂料

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摘要

The development of novel multifunctional coatings plays a crucial role in the achievement of more competitive architectural glasses and glazing materials for solar applications, among others. In this respect, coatings that provide high transmittance together with self-cleaning capacity could mean an added value to such glasses and glazing materials. Herein we report design and preparation of novel multifunctional (MF) coatings that present anti-reflection (AR) and self-cleaning (SC) capacity. First of all, preparation conditions of AR and SC coatings were optimized separately. The nano-structure and film thickness were carefully controlled by the solvent and the template agent ratio, in order to direct the refraction index and transmittance of each layer. Acquired experience allowed the fabrication of MF coatings consisting of two-layer stacks with a mesoporous SiO2 AR layer and a dense/mesoporous TiO2 layer. Regarding the anti-reflection capacity, MF and AR coatings present a net solar transmittance of 95.9% and 96.6%, respectively. Photocatalytic evaluation of the prepared SC and MF coatings showed that the mesoporous TiO2 layers can reach a higher photodegradation degree of organic matter than dense TiO2 layers. It is worth mentioning that the synergy between the AR and SC layers, promote a marked enhancement of the self-cleaning capacity of the MF coatings, exceeding in a 25–30% the photodegradation degree achieved with the commonly used porous or compact TiO2 coatings.
机译：新型多功能涂料的开发在实现更具竞争力的太阳能建筑玻璃和玻璃材料中起着至关重要的作用。在这方面，提供高透射率和自清洁能力的涂层可能意味着此类玻璃和玻璃材料的附加值。在这里，我们报告设计和制备新型的多功能（MF）涂层，它们具有抗反射（AR）和自清洁（SC）的能力。首先，分别优化了AR和SC涂层的制备条件。为了控制各层的折射率和透射率，通过溶剂和模板剂的比例小心地控制了纳米结构和膜的厚度。获得的经验允许制造由具有中孔SiO2 AR层和致密/介孔TiO2层的两层堆叠组成的MF涂层。关于抗反射能力，MF和AR涂层的净太阳透射率分别为95.9％和96.6％。对制备的SC和MF涂层的光催化评估表明，介孔TiO2层比致密TiO2层可以达到更高的有机物光降解度。值得一提的是，AR和SC层之间的协同作用可显着提高MF涂层的自清洁能力，其光降解度超过通常使用的多孔或致密TiO2涂层的25％至30％。

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