Polypyrrole‐Reinforced N, S‐Doping Graphene Foam for Efficient Solar Purification of Wastewater. Issue 7 (21st May 2021)

• Record Type: Journal Article
• Authors: Su, Lifen; Ning, Yuying; Ma, Ziqiang; Zhang, Yuhao; Liu, Chuanlei; Zhang, Youli; Miao, Lei; Zhou, Jianhua; Wu, Bin; Qian, Jiasheng
• Is Part Of: Solar RRL. Volume 5:Issue 7(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-05-21
• Subjects: heavy metal ions -- polypyrrole -- solar evaporation -- stabilities -- wastewater; Solar energy -- Periodicals; Photovoltaic power generation -- Periodicals; Solar energy -- Research -- Periodicals; Photovoltaic power generation -- Research -- Periodicals; Periodicals; 333.7923
• DOI: 10.1002/solr.202100210
• Languages: English
• ISSNs: 2367-198X

Abstract

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 (Fe 3+, Cu 2+, and Cr 6+ ) for treating wastewater synchronously evaporates at higher efficiencies of 94.7–98.4%. Interestingly, the high‐toxicity Cr 6+ can be reduced to low‐toxicity Cr 3+ 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. Abstract : This study focuses on the evaporation efficiency and long‐term stability of the photothermal materials in wastewater. The N, S‐doped graphene oxide (N, S‐GO)/polypyrrole (PPy) foam exhibits a large solar evaporation efficiency of >94% for treating wastewater with heavy ions and pH = 1–14. The high‐toxicity Cr 6+ can be reduced to low‐toxicity Cr 3+ effectively by the synergistic effect of N, S‐GO and PPy.