Polypyrrole-Reinforced N,S-Doping Graphene Foam for Efficient Solar Purification of Wastewater

Lifen Su, Yuying Ning, Ziqiang Ma, Yuhao Zhang, Chuanlei Liu, Youli Zhang, Lei Miao, Jianhua Zhou, Bin Wu, Jiasheng Qian

Research output: Contribution to journalArticlepeer-review

Abstract

Solar vapor generation is a sustainable and cost-effective approach to addressing the issue of water shortage. However, the challenges of solar steam generation still exist for achieving a high evaporation efficiency combined with long-term stability in the wastewater containing heavy metal ions and wide degrees of acidity and alkalinity (pH = 1–14). Herein, polypyrrole (PPy) loading on the N,S-doped graphene oxide (N,S-GO) foam is used for high-efficiency solar evaporation of treating wastewater. With the advantages of excellent broadband solar absorption (>97%), extremely low emissivity (0.70), and outstanding hydrophilicity, the N,S-GO/PPy foam achieves a high evaporation efficiency of 90.5% under 1 sun illumination. More notably, the N,S-GO/PPy foam has strong adsorption of heavy metal ions (Fe3+, Cu2+, and Cr6+) for treating wastewater synchronously evaporates at higher efficiencies of 94.7–98.4%. Interestingly, the high-toxicity Cr6+ can be reduced to low-toxicity Cr3+ effectively by the synergistic effect of N,S-GO and PPy. In addition, the N,S-GO foam shows a better long-term resistance of acidity and alkalinity for 45 days. A new insight is offered into high-efficiency solar evaporation for treating wastewater and water purification.

Original languageEnglish
Article number2100210
JournalSolar RRL
Volume5
Issue number7
DOIs
Publication statusPublished - 2021 Jul
Externally publishedYes

Keywords

  • heavy metal ions
  • polypyrrole
  • solar evaporation
  • stabilities
  • wastewater

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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