Department of Application Chemistry of School of Chemical Engineering, Hefei University of Technology, Hefei 230009, China.
Department of Application Chemistry of School of Chemical Engineering, Hefei University of Technology, Hefei 230009, China.
J Environ Sci (China). 2014 Nov 1;26(11):2355-61. doi: 10.1016/j.jes.2014.09.021. Epub 2014 Sep 26.
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.
通过形成纳米镍涂覆的活性炭复合材料，从用过的化学镀镍（EN）镀液中有效地回收镍。在超声作用下，三聚氰胺-甲醛-四氧乙基乙二胺螯合树脂接枝到活性炭上（MFT/AC）。将 PdCl2 溶胶吸附在 MFT/AC 上，然后将其浸入用过的化学镀镍镀液中；然后，通过抗坏血酸将纳米镍还原，在活性炭复合材料（Ni/AC）上原位形成纳米镍涂层。通过傅里叶变换红外光谱、X 射线衍射、场发射扫描电子显微镜、X 射线光电子能谱和电化学技术仔细检查了材料。树脂在 MFT/AC 中均匀分布在活性炭内外表面，尺寸为 120±30nm，大量纳米镍颗粒均匀沉积，尺寸为 3.8±1.1nm。此外，Ni/AC 成功地用作超声降解 2,6-二氯苯酚的催化剂。
