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-ethylened...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/AG）. PdC12 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 electro- chemistry 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-dichloronhenol.展开更多
Iminodiacetic acid functionalized polyglycidyl methacrylate grafted-carbon fibers(PGMA-IDA/CFs) were prepared for Ni(II) removal from aqueous solutions. The effects of solution p H value, temperature and adsorption ti...Iminodiacetic acid functionalized polyglycidyl methacrylate grafted-carbon fibers(PGMA-IDA/CFs) were prepared for Ni(II) removal from aqueous solutions. The effects of solution p H value, temperature and adsorption time were investigated. The maximum adsorption capacity of Ni(II) on PGMA-IDA/CFs is 0.923 mmol·L-1· g-1at pH 5.2 and 50 °C. Kinetic data indicate that the adsorption process matches the pseudo-second-order model and Elovich kinetic model. Thermodynamic data suggest that the adsorption process is endothermic spontaneous reaction.展开更多
Nano-meter micro-porous Ni_xZn_((1-x))Fe_2O_4 (x=0,0.5) ferrites were obtained by hydrothermal method. Triethylamine was used as template by differential thermal analysis (DTA). The results of adsorption experiment sh...Nano-meter micro-porous Ni_xZn_((1-x))Fe_2O_4 (x=0,0.5) ferrites were obtained by hydrothermal method. Triethylamine was used as template by differential thermal analysis (DTA). The results of adsorption experiment show that the powder has micro-porous structure. The crystal structure of the powder was studied by X-ray Diffraction (XRD), and the results show that the powder is of spinel structure. The morphology of Ni_xZn_((1-x))Fe_2O_4 (x=0, 0.5) ferrite was studied by TEM, and the results show that Ni_(0.5)Zn_(0.5)Fe_2O_4 and ZnFe_2O_4 ferrite is well-crystal, well-degree of dispersion with little conglomeration because of weak magnetism. The size of the powder is below 50 nm.展开更多
Ethyldiamine bridged dimer permethy-β-CD and other cyclodextrins were used as GC stationary phase to resolute DL-pantolactone. It is found that this CD dimer has a good selectivity for DL-pantolactone.
Silver （Ag） nanoparticles were directly electrodeposited on multi-walled carbon nanotubes （MWCNT） in AgNO3/LiNO3 containing EDTA （ethylenediaminetetraacetic acid）. The structure and nature of the resulting Ag/MW...Silver （Ag） nanoparticles were directly electrodeposited on multi-walled carbon nanotubes （MWCNT） in AgNO3/LiNO3 containing EDTA （ethylenediaminetetraacetic acid）. The structure and nature of the resulting Ag/MWNT composite were characterized by field emission scanning electron microscopy （FE-SEM）, transmission electron microscopy （TEM） and X-ray diffraction （XRD）, and the distribution shape of Ag nanoparticles was found to be dependent on the presence of EDTA. The modified electrode showed excellent electrocatalytic activity to redox reaction of hydrogen peroxide and the mechanism of hydrogen peroxide was partly reversible procession with oxidation and reduction peaks at 0.77 and -0.83 V, respectively. The oxidation and reduction peak currents were linearly related to hydrogen peroxide concentration in the range of 1×10^-6-3×10^-4 and 1 ×10^-8-7× 10^-4 mol·L^-1 with correlation coefficients of 0.996 and 0.986, and 3s-detection limit of 9 × 10^-7 and 7 × 10^-9 mol·L^-1.展开更多
基金supported by the National Natural Science Foundation of China (Nos. 21076054 and 21174001)the Natural Science Important Foundation of Educational Commission of Anhui Province (Nos. 2010AJZR-85 and 2011AJZR-87)+1 种基金the Study Foundation of New Product and Technology of Anhui Economic and Information Technology Commission (No. 2012AHST0797)the National College Student Innovation Fund (Nos. 201210359034, 2013CXSY327, and 2013CXSY366)
文摘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/AG）. PdC12 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 electro- chemistry 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-dichloronhenol.
基金Supported by the National Natural Science Foundation of China(21076054 and U140710231)the Natural Science Important Foundation of Educational Commission of Anhui Province(2010AJZR-85,2011AJZR-87)+1 种基金Study Foundation of New Product and Technology of Anhui Economic and Information Technology Commission(2012AHST0797,2013CXSY327 and 2013CXSY366)National College Student Innovation Fund(2014CXCY321 and 2014CXCY349)
文摘Iminodiacetic acid functionalized polyglycidyl methacrylate grafted-carbon fibers(PGMA-IDA/CFs) were prepared for Ni(II) removal from aqueous solutions. The effects of solution p H value, temperature and adsorption time were investigated. The maximum adsorption capacity of Ni(II) on PGMA-IDA/CFs is 0.923 mmol·L-1· g-1at pH 5.2 and 50 °C. Kinetic data indicate that the adsorption process matches the pseudo-second-order model and Elovich kinetic model. Thermodynamic data suggest that the adsorption process is endothermic spontaneous reaction.
文摘Nano-meter micro-porous Ni_xZn_((1-x))Fe_2O_4 (x=0,0.5) ferrites were obtained by hydrothermal method. Triethylamine was used as template by differential thermal analysis (DTA). The results of adsorption experiment show that the powder has micro-porous structure. The crystal structure of the powder was studied by X-ray Diffraction (XRD), and the results show that the powder is of spinel structure. The morphology of Ni_xZn_((1-x))Fe_2O_4 (x=0, 0.5) ferrite was studied by TEM, and the results show that Ni_(0.5)Zn_(0.5)Fe_2O_4 and ZnFe_2O_4 ferrite is well-crystal, well-degree of dispersion with little conglomeration because of weak magnetism. The size of the powder is below 50 nm.
文摘Ethyldiamine bridged dimer permethy-β-CD and other cyclodextrins were used as GC stationary phase to resolute DL-pantolactone. It is found that this CD dimer has a good selectivity for DL-pantolactone.
基金Project supported by the Natural Science Foundation of Anhui Province of China （No. 070415210）, the Science and Technology Program Foundation of Hefei City （No. 20071032）, and the Doctor Foundation of Hefei University of Technology （2005）.
文摘Silver （Ag） nanoparticles were directly electrodeposited on multi-walled carbon nanotubes （MWCNT） in AgNO3/LiNO3 containing EDTA （ethylenediaminetetraacetic acid）. The structure and nature of the resulting Ag/MWNT composite were characterized by field emission scanning electron microscopy （FE-SEM）, transmission electron microscopy （TEM） and X-ray diffraction （XRD）, and the distribution shape of Ag nanoparticles was found to be dependent on the presence of EDTA. The modified electrode showed excellent electrocatalytic activity to redox reaction of hydrogen peroxide and the mechanism of hydrogen peroxide was partly reversible procession with oxidation and reduction peaks at 0.77 and -0.83 V, respectively. The oxidation and reduction peak currents were linearly related to hydrogen peroxide concentration in the range of 1×10^-6-3×10^-4 and 1 ×10^-8-7× 10^-4 mol·L^-1 with correlation coefficients of 0.996 and 0.986, and 3s-detection limit of 9 × 10^-7 and 7 × 10^-9 mol·L^-1.
