Co-reporter:Jingcai Xu, Penghao Xin, Yuqing Gao, Bo Hong, Hongxiao Jin, Dingfeng Jin, Xiaoling Peng, Jing Li, Jie Gong, Hongliang Ge, Xinqing Wang
Materials Chemistry and Physics 2014 Volume 147(Issue 3) pp:915-919
Publication Date(Web):15 October 2014
DOI:10.1016/j.matchemphys.2014.06.037
•Very few CoFe2O4 were anchored into AC to obtain the higher surface area.•Sample-5 (CoFe2O4:C = 1:200) possessed the suitable Ms and higher surface area.•The 99% methylene blue could be adsorbed in 50 min with the CoFe2O4/AC nanocomposites.•CoFe2O4/AC nanocomposites could easily be recovered by magnetic separation technique.Owing to the unique microporous structure and high specific surface area, activated carbon (AC) could act as a good carrier for functional materials. In this paper, CoFe2O4/AC nanocomposites were prepared by a facile hydrothermal method for the adsorption of dyes in wastewater. The results indicated that CoFe2O4 nanoparticles presented the spinel structure and existed in the pores of AC. The saturation magnetization (Ms) increased with the CoFe2O4 content, while the surface area and pore volume decreased. For the larger magnetic moment, very few CoFe2O4 were needed to maintain the higher surface area of CoFe2O4/AC nanocomposites. The sample-5 (CoFe2O4:C = 1:200) possessed the surface area of 1096.85 m2 g−1 (close to 1243.35 m2 g−1 of AC) and Ms of 5.11 emu g−1, which were sufficient for magnetic separation in wastewater treatment. 99% methylene blue could be adsorbed in 50 min, and then the CoFe2O4/AC nanocomposites could be separated from the solution easily by an outer magnet.
Co-reporter:Guoying Wei, Hongliang Ge, Qiong Wu, Yundan Yu, Xinqing Wang, Chunqiang Chen
Materials Chemistry and Physics 2009 Volume 118(Issue 1) pp:57-62
Publication Date(Web):15 November 2009
DOI:10.1016/j.matchemphys.2009.07.003
Co–Pt–W magnetic thin films were electrodeposited from gluconate baths. Electrochemical characterization (polarization behaviors and transient curves), microstructure and magnetic properties were investigated. It turned out that increase in gluconate concentration and bath pH shifted the deposition potential to more negative potentials. Microstructure of electrodeposited Co–Pt–W thin films was affected by the bath pH and gluconate concentration enormously. Samples obtained from Co–sulphate–gluconate at pH 8.0 and gluconate concentration 0.3 mol L−1 exhibited single hcp phase with strong (0 0 1) PO. VSM and MFM measurement showed that perpendicular magnetic anisotropy occurred in the Co–Pt–W thin films prepared under these conditions.
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