Method for preparing nickel nanoparticles

Abstract

Provided is a method for preparing nickel nanoparticles capable of easily controlling particle sizes and shapes of the nickel nanoparticles and obtaining a high yield of the nickel nanoparticles using a process that is simpler than methods used to mass-produce the nickel nanoparticles. The method for preparing nickel nanoparticles may be useful to prepare nickel nanoparticles by mixing a nickel precursor and organic amine to prepare a mixture and heating the mixture.

1 . A method for preparing nickel nanoparticles, comprising:
 mixing a nickel precursor, organic amine and a reducing agent to prepare a mixture; and   heating the mixture.   
     
     
         2 . The method of  claim 1 , wherein an organic solvent is further mixed with the mixture. 
     
     
         3 . The method of  claim 1 , wherein the nickel precursor is at least one selected from the group consisting of nickel chloride (NiCl 2 ), nickel sulfate (NiSO 4 ), nickel acetate (Ni(OCOCH 3 ) 2 ), nickel acetylacetonate (Ni(C 5 H 7 O 2 ) 2 ), halogenated nickel (NiX 2 , wherein X is F, Br, or I), nickel carbonate (NiCO 3 ), nickel cyclohexanebutyrate ([C 6 H 11 (CH 2 ) 3 CO 2 ] 2 Ni), nickel nitrate (Ni(NO 3 ) 2 ), nickel oxalate (NiC 2 O 4 ), nickel stearate (Ni(H 3 C(CH 2 ) 16 CO 2 ) 2 ), nickel octanoate ([CH 3 (CH 2 ) 6 CO 2 ] 2 Ni) and hydrates thereof. 
     
     
         4 . The method of  claim 1 , wherein the organic amine is presented by C n NH 2  (wherein, n is an integer of 4≦n≦30). 
     
     
         5 . The method of  claim 1 , wherein the organic amine comprises at least one selected from the group consisting of oleyl amine, dodecyl amine, lauryl amine, octyl amine, trioctyl amine, dioctyl amine and hexadecyl amine. 
     
     
         6 . The method of  claim 1 , wherein the reducing agent comprises at least one selected from the group consisting of sodium borohydride (NaBH 4 ), tetrabutylammonium borohydride ((CH 3 CH 2 CH 2 CH 2 ) 4 N(BH 4 )), lithium aluminumhydride (LiAlH 4 ), sodium hydride (NaH), borane-dimethylamine complex((CH 3 ) 2 NH.BH 3 ) and alkanediol (HO(CH 2 ) n OH, wherein n is an integer of 5≦n≦30). 
     
     
         7 . The method of  claim 2 , wherein the organic solvent comprises at least one selected from the group consisting of an ether-based organic solvent (C n OC n , wherein n is an integer of 4≦n≦30), a saturated hydrocarbon-based organic solvent (C n H 2n+2 , wherein n is an integer of 7≦n≦30), an unsaturated hydrocarbon-based organic solvent (C n H 2n , wherein n is an integer of 7≦n≦30), and an organic acid-based organic solvent (C n COOH, wherein n is an integer of 5≦n≦30). 
     
     
         8 . The method of  claim 7 , wherein the ether-based organic solvent is at least one selected from the group consisting of trioctylphosphine oxide, alkyl phosphine, octyl ether, benzyl ether, and phenyl ether. 
     
     
         9 . The method of  claim 7 , wherein the saturated hydrocarbon-based organic solvent is at least one selected from the group consisting of hexadecane, heptadecane and octadecane. 
     
     
         10 . The method of  claim 7 , wherein the unsaturated hydrocarbon-based organic solvent is at least one selected from the group consisting of octene, heptadecene and octadecene. 
     
     
         11 . The method of  claim 7 , wherein the organic acid-based organic solvent is at least one selected from the group consisting of oleic acid, lauric acid, stearic acid, mysteric acid and hexadecanoic acid. 
     
     
         12 . The method of  claim 1 , wherein the operation of heating the mixture is performed at a temperature of 50 to 450° C. 
     
     
         13 . The method of  claim 1 , wherein the operation of heating the mixture is performed for 1 minute to 8 hours. 
     
     
         14 . The method of  claim 1 , further comprising: separating the nickel nanoparticles from the heated mixture. 
     
     
         15 . The method of  claim 14 , wherein the operation of separating the nickel nanoparticles from the heated mixture comprises: adding ethanol or acetone to the heated mixture to precipitate the nickel nanoparticles.