A hybrid hydrogel with protonated g-C 3 N 4 and graphene oxide as an efficient absorber for solar steam evaporation

Hui Su, Jianhua Zhou, Lei Miao, Jiaqi Shi, Yufei Gu, Pengfei Wang, Yongzhi Tian, Xiaojiang Mu, Anyun Wei, Lanhui Huang, Siyi Chen, Zijun Deng

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Carbon-based composites have gained renewed research interest in solar steam generation due to their low cost, durability and high photo-thermal efficiency. However, large-scale applications of carbon-based composites are restricted due to their high-emissivity in a high temperature condition. Here, by using melamine and graphene oxide as raw materials, the protonated g-C 3 N 4 /graphene hybrid hydrogel is prepared via a simple hydrothermal co-assembly method. The obtained self-floating hydrogel can convert the most of solar energy into thermal energy as well as pumping the underneath water to produce steam continuously. Furthermore, the existence of protonated g-C 3 N 4 decreases the emissivity of the composites. As a result, an average evaporation rate of 4.11 kg m −2 h −1 and a superb solar steam generation efficiency of 94.5% under 3-sun illumination are achieved. This hybrid hydrogel is highly promising to provide a solution to enhance solar water evaporation and desalination performance.

Original languageEnglish
Article numbere00095
JournalSustainable Materials and Technologies
Volume20
DOIs
Publication statusPublished - 2019 Jul
Externally publishedYes

Keywords

  • Desalination
  • Graphene oxide
  • Hydrogel
  • Solar steam generation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Waste Management and Disposal
  • Industrial and Manufacturing Engineering

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