Akademik Veri Yönetim Sistemi
38th Conference of the European Colloid & Interface Society, Kobenhavn, Danimarka, 1 - 06 Eylül 2024, ss.1, (Özet Bildiri)
Solar evaporation technology is a promising sustainable solution to global water scarcity. In a common example solar evaporation device, water is transferred through channels to the solar absorber material at water-air interface. The performance of such a device relies on the light absorption and light to heat conversion ability of photothermal material in solar absorber layer, evaporation efficiency of water, and structural optimization of device to minimize heat losses and to increase water uptake. Here, we suggest using a novel photothermal BiSn core-shell particles which unexpectedly exhibit both broadband absorption and efficient light-to-heat conversion in a single material. In addition to their extra-ordinary photothermal properties, the protective oxide shell around BiSn particles enables to obtain uniform coating, and ease water evaporation due to its hydrophilic nature. While diverse materials and complex designs are often emphasized in solar evaporation device construction in the literature [1,2], this study demonstrates the efficacy of a more straightforward approach. By depositing the particles onto a water-absorbing layer, we achieved water evaporation rates exceeding 1.9 kg/m²h under 1 sun power without even taking special precautions for heat loss. Such an achievement can be attributed to relatively low surface temperatures, only a couple of degrees warmer than room temperature, during evaporation. Considering the abundance of Bi and Sn, and facile particle synthesis conditions in addition to its superior water evaporation performance, BiSn core shell particles hold a potential to become a strong alternative for commonly used carbon-based materials for solar evaporation technologies.
Acknowledgement
This work was supported by Middle East Technical University, Scientific Research Projects under grant number of ADEP-308-2023-11234.
References
[1] Thoai, D. N., Ta, Q. T. H., Truong, T. T., Van Nam, H., & Van Vo, G. (2021). Review on the recent
development and applications of three dimensional (3D) photothermal materials for solar
evaporators. Journal of Cleaner Production, 293, 126122.
[2] Sinhamahapatra, A., & Kumar, A. (2023). Review of the progress of solar-driven interfacial water
evaporation (SIWE) toward a practical approach. Energy Advances.