Combining energy efficiency with self-cleaning properties in smart glass functionalized with multilayered semiconductors
| Autor: | Corrado Garlisi, Elie Azar, Esra Trepci, Giovanni Palmisano, Reem Al Sakkaf |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment business.industry 020209 energy Strategy and Management 05 social sciences 02 engineering and technology engineering.material Industrial and Manufacturing Engineering Glazing Semiconductor Coating 050501 criminology 0202 electrical engineering electronic engineering information engineering Transmittance Surface roughness engineering Optoelectronics Smart glass business Porosity 0505 law General Environmental Science Efficient energy use |
| Zdroj: | Journal of Cleaner Production. 272:122830 |
| ISSN: | 0959-6526 |
| Popis: | We propose here a new approach based on a combined study of the self-cleaning and energy-efficiency properties of stratified WO3/Cu–TiO2 coatings for glazing applications. The multifunctional performance was investigated by varying the number of layers deposited on the glass substrate (i.e., 1, 2, 4 layers), while energy efficiency was assessed using building energy modeling. Results indicate that the self-cleaning ability can be boosted by a multilayer configuration due to the inhibited charge recombination and to a gradual rise in surface roughness and porosity with the increasing number of layers. In particular, the highest wettability and degradation of toluene under simulated solar light were achieved over the coating consisting of Cu-doped TiO2 stacked with WO3 in a 4-layer configuration. On the other hand, the analogous sample, but in the 2-layer configuration, was the most active sample in the oxidation of carbon monoxide. In terms of energy efficiency, the applied coatings led to important energy savings, exceeding 8% in total energy consumption and 18% in cooling loads. The best energy efficiency levels in the tested glazing configurations were achieved with single-layer WO3. However, its low visible transmittance reduced the amount of natural daylight entering the studied buildings, unintentionally increasing the electric lighting loads. The results highlight the importance of alternative configurations, such as Cu-doped TiO2 in a dual-layer arrangement with WO3, which provide a better balance between energy efficiency and access to daylight, an important driver of occupant comfort and wellbeing. |
| Databáze: | OpenAIRE |
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