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- Title
Scalable and flexible biomass-derived photothermal paper for efficient solar-assisted water purification.
- Authors
Shi, Changrui; Luo, Wen; Zhang, Yang; Liu, Huiquan; Yang, Mingjun; Song, Yongchen; Zhao, Jiafei; Ling, Zheng
- Abstract
The use of solar-driven interfacial evaporation for seawater desalination and wastewater treatment is a promising solution to the pressing freshwater crisis. However, the challenge of developing low-cost, easy-to-make, scalable, and high-performance evaporators for efficient steam generation and stable desalination remains enormous. Herein, a cellulose-based carbon paper (CBCP) with outstanding flexibility and structural stability was successfully prepared by a simple and scalable strategy. The formation of ice crystals during the freeze-drying process effectively enlarges and links the pores among cellulose-based fibers, which would facilitate the evaporation and salt-rejecting capability of the as-obtained photothermal paper. The hierarchical porous structure, high light absorption, and excellent solar-thermal conversion capability give CBCP superior interfacial evaporation performance to produce clean water from a wide range of water sources, including real seawater, high salt wastewater, and dye-contained wastewater. The evaporator achieves a high evaporation rate of 1.25 kg m−2 h−1 (energy conversion efficiency of 80.6%) for real seawater under one sun irradiation and has good salt-rejecting capability. During 10 evaporation cycles (100 h in total), the obtained evaporation rate keeps constant around 1.31 kg m−2 h−1. In addition, about 7.7 kg m−2 of freshwater was produced from seawater per day in the outdoor evaporation test. These significant advantages will give CBCP great potential for practical solar-assisted desalination and wastewater purification.
- Subjects
WATER purification; SALINE water conversion; WASTEWATER treatment; ICE crystals; CARBON paper; STRUCTURAL stability
- Publication
Cellulose, 2023, Vol 30, Issue 11, p7193
- ISSN
0969-0239
- Publication type
Article
- DOI
10.1007/s10570-023-05326-1