High-Efficiency Solar Vapor Generation Boosted by a Solar-Induced Updraft with Biomimetic 3D Structures

Changwook Kim, Dongheok Shin, Monu Nath Baitha, Yunha Ryu, Augustine M. Urbas, Wounjhang Park, Kyoungsik Kim

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Sunlight-based desalination is one of the most environment-friendly, low-cost methods for obtaining freshwater on the planet. We implemented a biomimetic three-dimensional (3D) solar evaporator, improved by a solar-induced air-flow updraft. A carbon-coated polyvinyl alcohol (PVA) foam allowed us to achieve perfect absorption of ultrabroadband sunlight and continuously provide water to tall 3D structures. Integrating the convection flower (Amorphophallus titanum) and solar chimney structure, we proposed a bio-inspired 3D solar evaporator system that generates an updraft airflow. This updraft replaces saturated vapor between neighboring PVA foams with dry air, resulting in a significant increase in the effectiveness of dry air-water contact interfaces. Under the 1 sun condition (1 kW m-2), we achieve a high solar-vapor conversion efficiency of 95.9%.

Original languageEnglish
Pages (from-to)29602-29611
Number of pages10
JournalACS Applied Materials and Interfaces
Issue number25
Publication statusPublished - 2021 Jun 30

Bibliographical note

Funding Information:
This research was supported by the Yonsei Engineering Mid-career Professor Grant (2019) and Yonsei University Research Fund of 2020-22-0077.

Publisher Copyright:
© 2021 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)


Dive into the research topics of 'High-Efficiency Solar Vapor Generation Boosted by a Solar-Induced Updraft with Biomimetic 3D Structures'. Together they form a unique fingerprint.

Cite this