Preparation of Functionalized Graphene Nano-platelets and Use for Adsorption of Pb2+ from Solution

Functionalized graphene nano-platelets (FGN) were obtained via treating graphene nanoplatelets (GN) with HNO 3 , and served as adsorbent for the removal of Pb 2+ from solutions. We investigated the FGN adsorption capacity for Pb 2+ at different initial concentrations, varying pH, contact time and te...

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Bibliographic Details
Published in:Journal of Wuhan University of Technology. Materials science edition 2018-12, Vol.33 (6), p.1395-1401
Main Authors: Sheng, Zhibo, Cao, Ming, Hong, Yin, Wang, Shengniang, Fan, Zhihong, Xiong, Jianbo, Yang, Haicheng, Deng, Chunlin
Format: Article
Language:English
Subjects:
Adsorption
Advanced Materials
Chemistry and Materials Science
Fourier transforms
Functional groups
Graphene
Infrared analysis
Infrared spectroscopy
Isotherms
Materials Science
Platelets (materials)
Scanning electron microscopy
Thermal analysis
Thin films
Water treatment
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Summary:Functionalized graphene nano-platelets (FGN) were obtained via treating graphene nanoplatelets (GN) with HNO 3 , and served as adsorbent for the removal of Pb 2+ from solutions. We investigated the FGN adsorption capacity for Pb 2+ at different initial concentrations, varying pH, contact time and temperature. The characterization results of scanning electron microscopy (SEM), thermal analysis (TG/DTG), Fourier transform infrared spectroscopy (FT-IR) and Brunauer-Emmett-Teller (BET) method indicated that FGN layers were thin and possess large specific area with oxygen-containing functional groups grafted onto their surface. Meanwhile, the determined equilibrium adsorption capacity of FGN for Pb 2+ was 57.765 mg/g and adsorption isotherms well confirmed to Langmuir isotherms models. The results reveals that the FGN has better effect of water treatment.
ISSN:1000-2413
1993-0437
DOI:10.1007/s11595-018-1981-y