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Jang, Ji-Hyun
Nano Crystal Lab (NCL)
Research Interests
  • Graphene, photoelectrochemical (PEC) H2 generation, ORR/OER, SERS,3D-Nanostructures, supercapacitors, thermoelectric materials

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Rational Design of a High Performance and Robust Solar Evaporator via 3D-Printing Technology

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Title
Rational Design of a High Performance and Robust Solar Evaporator via 3D-Printing Technology
Author
Chaule, SouravHwang, JonghaHa, Seong-JiKang, JihunYoon, Jong-ChulJang, Ji-Hyun
Issue Date
2021-09
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED MATERIALS, v.33, no.38, pp.2102649
Abstract
Utilizing the broad-band solar spectrum for sea water desalination is a promising method that can provide fresh water without sophisticated infrastructures. However, the solar-to-vapour efficiency has been limited due to the lack of a proper design for the evaporator to deal with either a large amount of heat loss or salt accumulation. Here, these issues are addressed via two cost-effective approaches: I) a rational design of a concave shaped supporter by 3D-printing that can promote the light harvesting capacity via multiple reflections on the surface; II) the use of a double layered photoabsorber composed of a hydrophilic bottom layer of a polydopamine (PDA) coated glass fiber (GF/C) and a hydrophobic upper layer of a carbonized poly(vinyl alcohol)/polyvinylpyrrolidone (PVA/PVP) hydrogel on the supporter, which provides competitive benefit for preventing deposition of salt while quickly pumping the water. The 3D-printed solar evaporator can efficiently utilize solar energy (99%) with an evaporation rate of 1.60 kg m(-2) h(-1) and efficiency of 89% under 1 sun irradiation. The underlying reason for the high efficiency obtained is supported by the heat transfer mechanism. The 3D-printed solar evaporator could provide cheap drinking water in remote areas, while maintaining stable performance for a long term.
URI
https://scholarworks.unist.ac.kr/handle/201301/53966
URL
https://onlinelibrary.wiley.com/doi/10.1002/adma.202102649
DOI
10.1002/adma.202102649
ISSN
0935-9648
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