| 主权项 |
1. A method for separating a dispersed phase or a dissolved material from a continuous phase comprising the steps of
i) contacting said phases with an effective amount of nanoparticles; ii) applying a magnetic field gradient to the obtained system; iii) separating the obtained phases wherein said nanoparticles are of the core shell type, said core consists of a metal or alloy having soft magnetic properties and said shell contains one or more graphene-layers said nanoparticles having saturation magnetization of at least 120 A m2/kg, said graphene layer having a thickness between 0.3-5 nm, said graphene layer being functionalized by one or more of the groups according to formula (I): wherein n is an integer between 1 and 5; m is an integer between 0 and 20; Z represents a spacer selected from the group of alkyl, alkenyl, alkyloxy, peptides, amino acids saccharides; FG represents independent from each other OH, OR, NO2, NH2, NHR, NR2, COH, COR, COOH, COOR, SO2, SOR, SO2R, halogen, P(O)OH, P(O)OR, P(O)2OH, P(O)2OR R represents C1-C4alkyl, C1-C4alkoxy, C3-C10cyclo-alkyl, C4-C10 aryl, or a 5-membered heterocycle containing at least one atom selected from the group of N, O, S or a 6-membered heterocycle containing at least one atom selected from the group of N, O, S or a metal chelating group selected from the group consisting of polycarboxylic acids, polyamides, polyamides, amino acids, polyaminocarboxylates, polyamines, polysulfides; and its salts. |
