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A well-designed hierarchical architecture NiS@SiO2/graphene is prepared through electrostatic self-assembly between (3-aminopropyl) triethoxysilane (APTES)-modified NiS and graphene in aqueous solutions at room temperature. The obtained composite possesses a unique structure with SiO2 ultrasmall nanoparticles (3–5nm) derived from the pyrolysis of APTES homogeneously anchored on the surface of NiS...
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