Reaction Characteristic And Mechamism Of Nano-Alloy With Organic Chlorde

Fe-Ni nano-alloy has been synthesized by reducing mixture solution of Fe²⁺, Ni²⁺ with KBH₄ as reducer and polyethylene glycol as dispersant. It has the character of small granularity, high surface energy and reactive activation after deoxidized in hydrogen atmosphere at 400°C, and it can cause breakage of C-Cl bond of organic chloride and react with it in the presence of a little oxygen.Washing the products of Fe-Ni nano-alloy reacting with organic chloride, the result of elemental analysis shows that the products are FeCl₂, NiCl₂, Cl₂, and the production of Cl₂ is because of the combination of Cl atom or Cl free radical that came from the breakage of C-Cl bond, FeCl₂ and NiCl₂ were produced from the combination of Cl atoms or Cl free radical with the nano-alloy of high reactive activation howbeit. When washing the nano-alloy after reaction by H₂O, Cl₂ occurs disproportionation reaction with H₂O and produced Cl^- and ClO^-. The amount of Fe³⁺ and Ni²⁺ can be determined by ultraviolet-spectrometer, the amount of Cl^- and ClO^- was determined by the method of titration.The chromatogram analysis result of organic liquid that nano-alloy reacted with chlorobenzene testify that there are new organic liquid produced because the carbon free radical or carbonaceous free radical produced from the dissociation of C-Cl bond. Thereinto, diphenyl was produced in the products of nano-alloy reacting with chlorobenzene. Nontestify the rest products in experiment because the effects of experiment condition and the combinational diversification of free radical.The TEM analysis on the powder of nano-alloy after reacting with organic chloride shows that the crystal changed and crystal grain augment. The XRD analysis on the powder of nano-alloy after reacting with organic chloride shows that the carbon free radical or carbonaceous free radical can combine each other and enchase on the surface of nano-alloy, and Fe₃C and Fe₂C were produced after the reacted nano-alloy baking in N₂ atmosphere at 600°C. XRD result shows that after reduction the powder of nano-alloy after reacting with organic chloride in H₂ atmosphere at 600°C, it has the same crystal structure besides the disappearing of boron oxide because of the high temperature baking.The XPS analysis on the powder of nano-alloy after reacting with organic chloride also shows that Fe₃C and Fe₂C were produced after the reacted nano-alloy baking in N₂ atmosphere at 600°C, but because the nano-alloy can't react completely, only part of carbon free radical or carbonaceous free radical enchase on the surface of nano-alloy and the oxidation enrichment of boron and iron on the surface of nano-alloy, only a little Fe₃C and Fe₂C were determined.Take tetrachloride and chlorobenzene for example, the reaction mechanism of nano-alloy with organic chloride was described detailedly, the analysis of elemental content, HPLC, XPS and XRD all confirmed the reaction mechanism. This kind of research on the reaction mechanism has never been reported hitherto.