Chemical Synthesis and Self-Assembly of Hollow Ni/Ni₂P Hybrid Nanospheres

Abstract

Elevated interest is gathered around hybrid nanostructured materials, due to their combined physical−chemical properties. In this article, the synthesis and characterization of nanoparticles consisting of both Ni x P y and metallic Ni are reported. The nanoparticles have a core/shell structure, and they most probably combine both semiconducting and magnetic properties. To the best of our knowledge, this is the first time hybrid material with Ni, as well as 3D self-assembly of such material, is reported.

Phase Directing Ability of an Ionic Liquid Solvent for the Synthesis of HER-Active Ni2P Nanocrystals

“…[12][13][14] Typical methods used to synthesize high-quality colloidal Ni 2 P nanocrystals use traditional organic solvents (e.g., octadecene (ODE), dioctyl ether), expensive and/or reactive phosphide precursors (tri-n-octylphosphine (TOP), white phosphorus (P 4 ), tris(trimethylsilyl)phosphine (P(TMS) 3 ), and tri-n-butylphosphine), high temperatures, and/or multiple-step reactions. 10,[15][16][17] Triphenylphosphine (PPh 3 ) is a low-cost, less-reactive, and more air-stable phosphide precursor (~15% the cost of TOP in price per mole); 18 however, compared to TOP and P(TMS) 3 , nanocrystals synthesized using PPh 3 are typically large (>45 nm), ill-defined, amorphous, and/or not phase pure. [18][19][20] Herein, we report the one-step, heating up synthesis of Ni 2 P nanocrystals using Ni(acac) 2 , PPh 3 , oleylamine (OAm), and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIM-Tf 2 N) as the IL solvent (Eq.…”

“…10,[15][16][17] Triphenylphosphine (PPh 3 ) is a low-cost, less-reactive, and more air-stable phosphide precursor (~15% the cost of TOP in price per mole); 18 however, compared to TOP and P(TMS) 3 , nanocrystals synthesized using PPh 3 are typically large (>45 nm), ill-defined, amorphous, and/or not phase pure. [18][19][20] Herein, we report the one-step, heating up synthesis of Ni 2 P nanocrystals using Ni(acac) 2 , PPh 3 , oleylamine (OAm), and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIM-Tf 2 N) as the IL solvent (Eq. 1, see…”

The Preparation of Other Chalcogenides and Pnictide Nanomaterials

“…Several related reports also describe the synthesis of hollow NiP particles, attributable to the Kirkendall effect. 86,98 In a typical example, 99 Ni(CH 3 COCHCOCH 3 ) 2 , OAm, TOP and ODE were mixed together and heated to 320 C over a 15 minute period, and le for 1 hour, followed by cooling and precipitation of the resulting solid using acetone. The resulting hollow Ni 2 P particles were 5-15 nm in diameter, with a wall thickness of 2-3 nm.…”

Direct synthesis and growth mechanism of 3D dendritic Mg3P2 microstructures

“…due to the special physical and chemical properties [7][8][9]. So far, phosphides have been prepared by the reduction of phosphates, the reaction of metal oxides and phosphine, the decomposition of phosphite, solvothermal method, plasma method, etc.…”