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.

Details

Title
Preparation of efficient photothermal materials from waste coffee grounds for solar evaporation and water purification
Author
Chih-Feng, Wang 1 ; Chih-Lin, Wu 2 ; Shiao-Wei, Kuo 3 ; Wei-Song, Hung 4 ; Kuo-Jung, Lee 2 ; Hsieh-Chih, Tsai 4 ; Chi-Jung, Chang 5 ; Lai Juin-Yih 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) 
 I-Shou University, Department of Materials Science and Engineering, Kaohsiung, Taiwan (GRID:grid.411447.3) (ISNI:0000 0004 0637 1806) 
 National Sun Yat-Sen University, Department of Materials and Optoelectronic Science, Kaohsiung, Taiwan (GRID:grid.412036.2) (ISNI:0000 0004 0531 9758) 
 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) 
 Feng Chia University, Department of Chemical Engineering, Taichung, Taiwan (GRID:grid.411298.7) (ISNI:0000 0001 2175 4846) 
Publication year
2020
Publication date
2020
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2428281913
Copyright
© The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.