Taranova Anastasiia, Akbar Kamran, Moretti Elisa, Vomiero Alberto, Pezzotti Giuseppe, Morita Tatsuro, Marin Elia, Zhu Wenliang
Ceramic Physics Laboratory, Kyoto Institute of Technology, Sakyo-ku, Matsugasaki, Kyoto 606-8585, Japan.
Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice, Via Torino 155, 30172 Venezia Mestre, Italy.
Materials (Basel). 2024 May 21;17(11):2482. doi: 10.3390/ma17112482.
Solar water evaporation offers a promising solution to address global water scarcity, utilizing renewable energy for purification and desalination. Transition-metal selenite hydrates (specifically nickel and cobalt) have shown potential as solar absorbers with high evaporation rates of 1.83 and 2.34 kg∙m∙h, but the reported discrepancy in evaporation rate deserves further investigation. This investigation aims to clarify their thermal stability for applications and determine the underlying mechanisms responsible for the differences. Nickel and cobalt selenite hydrate compositions were synthesized and investigated via thermogravimetric analysis, X-ray diffraction, and Raman spectroscopy to assess their temperature-induced structural and compositional variations. The results reveal distinct phase transitions and structural alterations under various temperature conditions for these two photothermal materials, providing valuable insights into the factors influencing water transportation and evaporation rates.
太阳能水蒸发为解决全球水资源短缺问题提供了一种很有前景的解决方案，它利用可再生能源进行水的净化和脱盐。过渡金属亚硒酸盐水合物（特别是镍和钴）已显示出作为太阳能吸收剂的潜力，其蒸发速率分别高达1.83和2.34 kg∙m∙h，但报道的蒸发速率差异值得进一步研究。本研究旨在阐明它们在应用中的热稳定性，并确定造成差异的潜在机制。通过热重分析、X射线衍射和拉曼光谱对镍和钴亚硒酸盐水合物的组成进行了合成和研究，以评估其温度诱导的结构和组成变化。结果揭示了这两种光热材料在不同温度条件下明显的相变和结构变化，为影响水传输和蒸发速率的因素提供了有价值的见解。
