Synthesis of NiS and MnS Nanocrystals from the Molecular Precursors (TMEDA)M(SC{O}C₆H₅)₂ (M = Ni, Mn)

Abstract

The compounds (TMEDA)M(SC{O}C 6 H 5 ) 2 (M ) Ni, 1; Mn, 2) have been synthesized and characterized by X-ray crystallography. Both of the monomeric molecular precursors have been used to make the corresponding monodispersed NiS (two different phases) and cubic phase MnS nanocrystals (NCs) under specific experimental conditions. Changing the surfactants yielded low-temperature rhombohedral β-NiS NCs with millerite structure in dodecanethiol and high-temperature hexagonal R-NiS NCs with NiAs-type structure in oleic acid, while monodispersed hexagonal shaped R-MnS NCs with rock-salt structure were obtained in the presence of a combination of oleylamine and dodecanethiol surfactants. The NCs have been characterized by X-ray powder diffraction patterns, transmission electron microscopy, selected area electron diffraction patterns, and energy-dispersive X-ray analysis. Preliminary magnetic measurements show that the two phases of NiS NCs exhibit weak magnetism and hysteresis.

Solvent-mediated crystalline phases of NixSy anchored on rGO sheets as electrocatalysts for hydrogen evolution application

“…1(g)) reveals that this crystal plane distance of Ni x S y for Ni x S y /rGO-10 is 0.296 nm, which is consistent with the previous report about α-NiS. 15,16 Finally, when the D.I. water is totally replaced by EG (Ni x S y /rGO-15), the aggregated Ni x S y microspheres form and obviously separate with rGO ( Fig.…”

Nanocrystalline Nickel and Cobalt Sulfides Formed by a Heavy Metal-Tolerant, Sulfate-Reducing Enrichment Culture

“…Due to their interesting electronic and catalytic properties, various synthesis protocols for the formation of nanocystalline NiS at moderate to low temperatures (<150 • C) have been proposed (Jeong and Manthiram 2001;Meng et al 2002;Sun 2003;Tian et al 2009). In this respect, SRB mediated growth may be considered as a method to synthesize metastable nanocrystalline α-NiS with a sharp size distribution.…”

Synthesis and characterization of PbS crystals via a solvothermal route

“…Many efforts have been devoted to the morphological control and spatial patterning of semiconductor nanocrystals of metal sulfides [5][6][7].…”