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

Zhibo Sheng; Ming Cao; Yin Hong; Shengniang Wang; Zhihong Fan; Jianbo Xiong; Haicheng Yang; Chunlin Deng

doi:10.1007/s11595-018-1981-y

Journal of Wuhan University of Technology Materials Science Edition ›› 2018, Vol. 33 ›› Issue (6) : 1395 -1401. DOI: 10.1007/s11595-018-1981-y

Advanced Materials

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

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Abstract

Functionalized graphene nano-platelets (FGN) were obtained via treating graphene nanoplatelets (GN) with HNO₃, and served as adsorbent for the removal of Pb²⁺ from solutions. We investigated the FGN adsorption capacity for Pb²⁺ 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 Pb²⁺ 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.

Keywords

functionalized graphene nano-platelets / water treatment / adsorption

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Zhibo Sheng, Ming Cao, Yin Hong, Shengniang Wang, Zhihong Fan, Jianbo Xiong, Haicheng Yang, Chunlin Deng. Preparation of Functionalized Graphene Nano-platelets and Use for Adsorption of Pb²⁺ from Solution. Journal of Wuhan University of Technology Materials Science Edition, 2018, 33(6): 1395-1401 DOI:10.1007/s11595-018-1981-y