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Self-assembled core-shell polydopamine@MXene with synergistic solar absorption capability for highly efficient solar-to-vapor generation
- Source :
- Nano Research. 13:255-264
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- As a renewable and environment-friendly technology for seawater desalination and wastewater purification, solar energy triggered steam generation is attractive to address the long-standing global water scarcity issues. However, practical utilization of solar energy for steam generation is severely restricted by the complex synthesis, low energy conversion efficiency, insufficient solar spectrum absorption and water extraction capability of state-of-the-art technologies. Here, for the first time, we report a facile strategy to realize hydrogen bond induced self-assembly of a polydopamine (PDA)@MXene microsphere photothermal layer for synergistically achieving wide-spectrum and highly efficient solar absorption capability (≈ 96% in a wide solar spectrum range of 250–1,500 nm wavelength). Moreover, such a system renders fast water transport and vapor escaping due to the intrinsically hydrophilic nature of both MXene and PDA, as well as the interspacing between core-shell microspheres. The solar-to-vapor conversion efficiencies under the solar illumination of 1 sun and 4 sun are as high as 85.2% and 93.6%, respectively. Besides, the PDA@MXene photothermal layer renders the system durable mechanical properties, allowing producing clean water from seawater with the salt rejection rate beyond 99%. Furthermore, stable light absorption performance can be achieved and well maintained due to the formation of ternary TiO2/C/MXene complex caused by oxidative degradation of MXene. Therefore, this work proposes an attractive MXene-assisted strategy for fabricating high performance photothermal composites for advanced solar-driven seawater desalination applications.
- Subjects :
- Water transport
Materials science
business.industry
Energy conversion efficiency
Nanotechnology
02 engineering and technology
Photothermal therapy
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Solar energy
01 natural sciences
Atomic and Molecular Physics, and Optics
0104 chemical sciences
Renewable energy
General Materials Science
Seawater
Electrical and Electronic Engineering
0210 nano-technology
Absorption (electromagnetic radiation)
business
Ternary operation
Subjects
Details
- ISSN :
- 19980000 and 19980124
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- Nano Research
- Accession number :
- edsair.doi...........c2fadbd080cea83a9db8d3a993a8ae22