Preparation and properties of uniform amorphous and crystalline colloidal nickel sulfide

Zn–Ni sulfide selective precipitation: The role of supersaturation

“…Indeed, Meng et al [34] and Jeong and Manthiram [33] showed that by changing the dosing ratio, the precipitation of nickel with thiourea and with sodium dithionite, respectively, generates precipitates with different morphologies and ratios. The same was indicated by Wang et al [54] who precipitated nickel with sodium sulfide by controlled double-jet precipitation. In addition, Meng et al [34] also showed an equivalent effect caused by the pH and several have pointed out the polymorphism resulting from the precipitation of nickel with sulfide [33,34,54,55].…”

“…The same was indicated by Wang et al [54] who precipitated nickel with sodium sulfide by controlled double-jet precipitation. In addition, Meng et al [34] also showed an equivalent effect caused by the pH and several have pointed out the polymorphism resulting from the precipitation of nickel with sulfide [33,34,54,55]. The same is suggested by the reaction ratios shown in Fig.…”

Efficient sorption and photocatalytic degradation of malachite green dye onto NiS nanoparticles prepared using novel green approach

“…1(a)). NiS nanoparticles displayed similar change in color in case of the study conducted by [34]. In control experiments where leaf extract was not added to Ni(NO 3 ) 2 solution, insoluble dark brown precipitates of NiS were observed.…”

Seed-induced synthesis of h-NiS single-crystalline hexagonal nanoparticles

“…When the system reaches 190°C a solution consisting of Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/ceramint 2.5 mmol of NA, 2.5 mmol of TU and 0.01 mmol of PVP solubilized in 20 mL of TEG is added dropwise inside the flask, under constant magnetic stirring. The solution to be added inside the vessel undergoes a N 2 purge in order to maintain an atmosphere without oxygen excess, since it can prevent nickel sulfide formation [14]. After these steps, the system is kept at a 190°C plateau and the resulting black colloidal solution is washed with distilled water and pure ethanol separately.…”

“…Different sizes and shapes of NiS nanostructures have been reported in literature, such as spheres [10], pyramids [11], flowers [12], sheets [13], cubes [14] and thin films [15]. To achieve the aforementioned morphologies several synthesis methods have been employed, such as chemical vapor deposition [16], solvothermal [10,12], mechanical alloying [17], polyol method [18], solventless synthesis [19] and so on [20].…”