Co9S8-embedded sodium alginate aerogel: A novel high-efficiency photothermal aerogel for solar steam generation

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies Pub Date : 2025-05-09 DOI:10.1016/j.susmat.2025.e01447

Balamurugan Karuppaiah , Muhammad Faris Hamid , Moonwoo La , Dongwhi Choi , Sung Jea Park

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引用次数: 0

Abstract

Utilizing the plentiful energy from the sun to produce clean water via solar steam generation systems offers a potential solution to alleviate persistent water and energy shortages. Aerogel-based interfacial solar steam generation has enormous potential for treating wastewater and desalination of salt water. In this study, a Co₉S₈/sodium alginate (Co₉S₈/SA) aerogel was developed for interfacial solar steam generation applications. Co₉S₈ was prepared by the solvothermal method and dispersed into the 2 % SA hydrogel, followed by the freeze-drying of the Co₉S₈/SA matrix to create the aerogel. The physical and chemical characteristics of Co₉S₈/SA aerogel were examined using p-XRD, FE-SEM, contact angle measurements, XPS, and UV analysis. Co₉S₈/SA has remarkable properties, like the presence of voids in the structure, hydrophilicity, and strong solar absorption across the visible to infrared spectrum. Moreover, XPS spectra confirm the presence of an S-OH bond, which can strengthen the aerogel matrix. These advantageous properties collectively enhance the evaporation rate (1.81 kg/m²/h) with an admirable evaporation efficiency of 99.73 % under 1.0 sun illumination. Furthermore, Co₉S₈/SA exhibited good stability with different sun intensities and effective seawater desalination and dye removal. Thus, the developed Co₉S₈/SA aerogel is highly suited to solar steam generation and practical water purification applications.

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co9s8包埋海藻酸钠气凝胶：一种新型高效光热气凝胶，用于太阳能蒸汽发电

利用来自太阳的丰富能量，通过太阳能蒸汽产生系统生产清洁的水，为缓解持续的水和能源短缺提供了一个潜在的解决方案。基于气凝胶的界面太阳能蒸汽发电在污水处理和海水淡化方面具有巨大的潜力。在本研究中，开发了Co9S8/海藻酸钠（Co9S8/SA）气凝胶用于界面太阳能蒸汽产生。采用溶剂热法制备Co9S8，将其分散到2% SA水凝胶中，然后将Co9S8/SA基质冷冻干燥制成气凝胶。采用p-XRD、FE-SEM、接触角测量、XPS和UV分析对Co9S8/SA气凝胶的理化性质进行了表征。Co9S8/SA具有显著的性能，如结构中存在空隙，亲水性，以及在可见到红外光谱上强烈的太阳吸收。此外，XPS光谱证实了S-OH键的存在，该键可以增强气凝胶基质。这些优点共同提高了蒸发速率（1.81 kg/m2/h），在1.0光照下蒸发效率达到99.73%。Co9S8/SA在不同光照强度下均表现出良好的稳定性，并能有效地脱除海水和染料。因此，开发的Co9S8/SA气凝胶非常适合太阳能蒸汽产生和实际水净化应用。

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来源期刊

Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment

CiteScore

13.40

自引率

4.20%

发文量

158

审稿时长

45 days

期刊介绍： Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.