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Abstract
Effective water use is currently a critical global challenge needed to prevent water shortages and has attracted significant research attention. The realization of solar-driven water evaporation by using effective converters has attracted considerable attention in recent years owing to its potential for seawater desalination and wastewater treatment. Consequently, this paper proposes a simple two-step method to prepare low-cost and self-floating photothermal converters from waste coffee grounds. First, the coffee grounds were carbonized at 1,000 °C to develop broadband absorption, and the carbonized coffee grounds were modified using hydrophobic silane to enhance the water-floatation property of the grounds. The prepared hydrophobic carbonized coffee grounds exhibited good performance for desalination and water purification under sunlight irradiation. The self-floatation ability, low cost, well solar evaporation performance, and easy preparation contribute to the promising potential of using hydrophobic carbonized coffee grounds infuture steps toward eco-friendly desalination procedures.
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Details
1 National Taiwan University of Science and Technology, Advanced Membrane Materials Research Center, Graduate Institute of Applied Science and Technology, Taipei, Taiwan (GRID:grid.45907.3f) (ISNI:0000 0000 9744 5137); Chung Yuan University, R&D Centre for Membrane Technology, Taoyuan, Taiwan (GRID:grid.45907.3f)
2 I-Shou University, Department of Materials Science and Engineering, Kaohsiung, Taiwan (GRID:grid.411447.3) (ISNI:0000 0004 0637 1806)
3 National Sun Yat-Sen University, Department of Materials and Optoelectronic Science, Kaohsiung, Taiwan (GRID:grid.412036.2) (ISNI:0000 0004 0531 9758)
4 National Taiwan University of Science and Technology, Advanced Membrane Materials Research Center, Graduate Institute of Applied Science and Technology, Taipei, Taiwan (GRID:grid.45907.3f) (ISNI:0000 0000 9744 5137)
5 Feng Chia University, Department of Chemical Engineering, Taichung, Taiwan (GRID:grid.411298.7) (ISNI:0000 0001 2175 4846)