1. An Expanded Perlite‐Based Aerogel with Oil‐Repellent Properties for Efficient Solar Evaporation in Oil‐bearing Wastewater.
- Author
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Guo, Yuping, Tian, Qi, Lu, Haijing, Qu, Nannan, Chen, Lihua, Zhang, Yuhan, Xiao, Chaohu, and Hasi, Qi‐Meige
- Subjects
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SEWAGE , *AEROGELS , *PHOTOTHERMAL conversion , *WATER efficiency , *FRESH water , *CARBONIZATION - Abstract
Solar steam generation (SSG) has become a cutting‐edge technology to solve fresh water shortage. Herein, a neotype photothermal conversion material (CAEP‐PFO) was designed and prepared by using expanded perlite as raw material and sodium alginate as crosslinking agent, through directional freezing, surface carbonization and oil‐phobic modification. Through characterization analysis, the results showed that the prepared CAEP‐PFO has a porosity of 92 %, a light absorption of more than 88 %, and a low thermal conductivity of 0.06834 W m−1 K−1. In addition, CAEP‐PFO exhibits excellent salt resistance and oil repellency, and possess an evaporation efficiency of 78.6 % in 10 % brine and 80.2 % in oil‐bearing wastewater under the irradiation of 1 kW m−2, respectively. After 8 cycles of test, the evaporation efficiency in pure water is relatively stable, and the average evaporation efficiency can reach 84.28 %. The research may lay a foundation for the future preparation of photothermal materials and the practical application in seawater and oil‐bearing wastewater. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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