Ultrasonic preparation of nano-nickel/activated carbon composite using spent electroless nickel plating bath and application in degradation of 2,6-dichlorophenol


Jingyu Su , Guanping Jin , Changyong Li , Xiaohui Zhu , Yan Dou , Yong Li , Xin Wang , Kunwei Wang , Qianqian Gu

DOI:10.1016/j.jes.2014.09.021

Received December 08, 2013,Revised February 11, 2014, Accepted , Available online November 20, 2014

Volume 26,2014,Pages 2355-2361

Ni was effectively recovered from spent electroless nickel (EN) plating baths by forming a nano-nickel coated activated carbon composite. With the aid of ultrasonication, melamine-formaldehyde-tetraoxalyl-ethylenediamine chelating resins were grafted on activated carbon (MFT/AC). PdCl2 sol was adsorbed on MFT/AC, which was then immersed in spent electroless nickel plating bath; then nano-nickel could be reduced by ascorbic acid to form a nano-nickel coating on the activated carbon composite (Ni/AC) in situ. The materials present were carefully examined by Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, X-ray photoelectron spectroscopy and electrochemistry techniques. The resins were well distributed on the inside and outside surfaces of activated carbon with a size of 120±30 nm in MFT/AC, and a great deal of nano-nickel particles were evenly deposited with a size of 3.8±1.1 nm in Ni/MFT. Moreover, Ni/AC was successfully used as a catalyst for ultrasonic degradation of 2,6-dichlorophenol.

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