期刊
COMPOSITES COMMUNICATIONS
卷 36, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2022.101358
关键词
Solar energy; Silk; Aerogel; Desalination; Purification
资金
- National Natural Science Foundation of China [52003002]
- Anhui Province INTERNATIONAL COOPERATION Research Center of Textile Structure Composites [2021ACTC05]
- Foundation Research of Anhui Polytechnic University [Xjky2022082]
- Anhui Polytechnic University Young-Middle-aged Top Talent Program
In this study, silk fibroin (SF)/ carbon nanofiber (CN) composite aerogel (SCNA) was prepared by incorporating carbonized electrospun polyacrylonitrile (PAN) nanofibers into SF aqueous solution. The SCNA showed excellent solar absorbing capacity and high evaporation rates, and could be reused multiple times, indicating its great potential for solar evaporation applications.
The development of bio-based aerogel is an important solar evaporation issue owing to its environmental protection, sustainable water transportation, and intrinsic thermal management properties. Herein, silk fibroin (SF)/ carbon nanofiber (CN) composite aerogel (SCNA) was prepared by incorporating carbonized electrospun polyacrylonitrile (PAN) nanofibers into SF aqueous solution and then performing a freeze-drying process. The SCNA with optimized CN loading demonstrated outstanding solar absorbing capacity (99.89%) across the whole spectrum due to the synergy between the functional solar absorbing CN material and the SF skeleton (71.64%). With high porosity, the SF skeleton can encapsulate the CN, transport water, and suppress heat loss in solar evaporation. As a result, high evaporation rates were achieved for pure water (1.46 kg m(-2) h(-1)), 3.5% salty water (1.42 kg m(-2) h(-1)), and actual dyeing wastewater (1.43 kg m(-2) h(-1)). Besides, the SCNA could be reused more than ten times without performance degradation, assuring long-term efficient solar steam generation. Therefore, this work will stimulate more research on the use of biomass materials for solar evaporation, especially silk-based aerogel.
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