期刊
ACS APPLIED MATERIALS & INTERFACES
卷 3, 期 9, 页码 3633-3637出版社
AMER CHEMICAL SOC
DOI: 10.1021/am200839m
关键词
graphene; polypyrrole; perchlorate; uptake capacity; ion exchange; water treatment
资金
- U.S. Department of Defense's [ER-1433]
- DOE's Office of Biological and Environmental Research and located at PNNL
- DOE by Battelle [DE-AC05-76RL01830]
- China Scholarship Council
Perchlorate (ClO4-) contamination is a widespread concern affecting water utilities. In the present study, functionalized graphene sheets were employed as the scaffold to synthesize a novel graphene-polypyrrole (Ppy) nanocomposite, which served as an excellent electrically switched ion exchanger for perchlorate removal. Scanning electron microscopy and electrochemical measurements showed that the 3D nanostructured graphene-Ppy nanocomposite exhibited a significantly improved uptake capacity for ClO4- compared with Ppy film alone. X-ray photoelectron spectroscopy confirmed the uptake and release process of ClO4- in graphene-Ppy nanocomposite. In addition, the presence of graphene substrate resulted in high stability of graphene-Ppy nanocomposite during potential cycling. The present work provides a promising method for large scale water treatment.
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