Magnetically recoverable Ni@C composites: The synthesis by carbonization and adsorption for Fe3+

JOURNAL OF ALLOYS AND COMPOUNDS

卷:718

Article

Wu, Xiaowen¹  Zhang, Zhijie¹  Xia, Chao¹  Chen, Biqiong²  Jin, Xiaozhao¹  Huang, Zhaohui¹  Liu, Yan-gai¹  Fang, Minghao¹  Min, Xin¹ 

[1] China Univ Geosci, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Sch Mat Sci & Technol, Natl Lab Mineral Mat, Beijing 100083, Peoples R China

[2] Univ Sheffield, Dept Mat Sci & Engn, Mappin St, Sheffield S1 3JD, S Yorkshire, England

关键词: Ni@C composite;    Magnetic property;    Adsorption behavior;   

DOI  :  10.1016/j.jallcom.2017.05.029

来源: Elsevier

【 摘 要 】

Carbon-encapsulated nickel particles (Ni@C composites) for removing Fe3+ in wastewater have been prepared by the carbonization of phenolic resin mixing with nickel particles. XRD results reveal that the Ni@C composites are consisted of C, Ni, and Ni3S2. The TG-DTG curves of Ni@C composites are almost same as that of phenolic resin. The morphology investigation shows that Ni is distributed randomly on carbon. Based on analysis of N-2 adsorption-desorption isotherm, the surface area and pore volume of Ni@C composites are 187.47 m(2) g(-1) and 0.06900 cm(3) g(-1) nm(-1), respectively. The saturation magnetization values for Ni@C composites are 68.99 emu.g(-1) determined by the Vibrating Sample Magne-tometer. Ni@C composites exhibit a high adsorption capacity for Fe3+. The adsorption behavior follows the pseudo-second-order kinetic and Langmuir model between the adsorbents and Fe3+. Furthermore, the adsorption capacity of Ni@C composites derives from the attractive force between the adsorbed anion and the surface positive charge of Ni@C composites, as well as the bond between the adsorbed cation and the COO- groups. From the above results Ni@C composites can be widely applied in wastewater treatment as a new efficiency and excellent recoverable adsorbent. (C) 2017 Elsevier B.V. All rights reserved.

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