期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 278, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2021.119621
关键词
Solar steam generation; Carbon black; Polydopamine; Salt resistance; Desalination
资金
- National Natural Science Foundation of China [51603075, 12072325]
- National Key R&D Program of China [2019YFA0706802]
This study developed a high-efficiency and low-cost solar steam generation technology by combining carbon black and polydopamine, which has high light absorption, superhydrophilicity, and high energy conversion efficiency. The technology shows potential applications in seawater desalination and wastewater purification.
The utilization of solar energy for steam generation is a highly efficient and sustainable technology for seawater desalination to solve the long-standing water crisis. Carbon-based materials have shown promising thermal-heat conversion efficiency due to their broadband solar absorption. Herein, carbon black (CB) was combined with polydopamine (PDA) to develop a high-performance, low-cost, and scalable PDA/CB@PP composite non-woven fabric was fabricated by dip-coating of CB and in situ polymerization of PDA. The hierarchical structure constructed on the fiber surface and the synergetic effects of CB and PDA contributed to the high light absorbance (>95%), superhydrophilicity, and high energy conversion efficiency. The one-way fluidic PDA/CB@PP photo-thermal based solar steam evaporator demonstrated a high evaporation rate of 1.68 kg m(-2) h(-1) with a solar steam efficiency of 91.5%. Moreover, the PDA/CB@PP fabric shows remarkable salt resistance when purifying seawater because of the water channel preserved by the hydrophilic porous structure of the fabric which could provide sustained water supply. Besides, the PDA/CB@PP fabric possesses excellent purification capability to wastewaters contaminated by heavy-metal and chemical dyes. This study provides insights into the design and development of low-cost, scalable, highly stable, and efficient solar steam generators for seawater desalination and wastewater purification.
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