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Study on the preparation of nanoscale Fe/Ni bimetal and its reduction of 2,4-dichlorophenol from aqueous solution |
FAN Xianyuan, SUN Yi, RUAN Xia, LI Zhe, LIU Hong |
College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China |
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Abstract: Nanoscale Fe/Ni bimetal is prepared by the liquid phase reduction method. The effects of the FeCl2 concentration, n(Ni)/n(Fe), and n(NaBH4)/n(FeCl2) on the reduction of 2, 4-dichlorophenol(2, 4-DCP) are investigated and the reduction pathway of 2, 4-DCP is confirmed. The results show that when the concentration of the FeCl2 solution is 3 mol/L, n(Ni)/n(Fe)=4%, and n(NaBH4)/n(FeCl2)=1, the removal efficiency of 2, 4-DCP is nearly 100%, with 95% of 2, 4-DCP being reduced to phenol. The morphology of the nano Fe/Ni is spherical particles with diameter of about 50 nm. The Fe/Ni particles are linked into branches by their inherent magnetic force and are aggregated dispersedly owing tothe electrostatic stabilization. The BET surface area of the Fe/Ni particles reaches 44.8 m2/g. The pathway of 2, 4-DCP is mainly attributed to the fact that two C-Cl bands are broken in turns to form 2-chlorophenol or 4-chlorophenol, and then dechlorinated to phenol.
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Received: 05 September 2016
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