Controlling the size and morphology of anisotropic nanostructures of nickel borate using microemulsions and their magnetic properties

Menaka,; Sharma, S.K.; Ramanujachary, Kandalam V.; Lofland, S. E.; Ganguli, Ashok K.

doi:10.1016/j.jcis.2011.04.100

Cited by 20 publications

(18 citation statements)

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“…[14][15][16][17][18] Among the known metal borates, nickel borate (Ni 3 (BO 3 ) 2 ) has attracted signicant interest because of its magnetic, catalytic, and phosphorescent properties. [19][20][21][22] In Menaka's research, 20 the obtained Ni 3 (BO 3 ) 2 nanorods and nanospindles showed antiferromagnetic behaviour with a minor variation in the Néel temperature (44-47 K). Terry 22 reported producing of fatty amines with a nickel borate catalyst within different temperature ranges.…”

Section: Introductionmentioning

confidence: 99%

“…Menaka et al reported the synthesis of Ni 3 (BO 3 ) 2 nanoparticles by the reverse micellar route 19 and the precursor-mediated route. 20 Liu et al 21 prepared rod-like micro Ni 3 (BO 3 ) 2 via a facile NaCl and NP-9 ux-assisted thermal conversion route. However, it is still difficult to control the synthesis of Ni 3 (BO 3 ) 2 with 1D morphologies.…”

Section: Introductionmentioning

confidence: 99%

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One-dimensional nickel borate nanowhiskers: characterization, properties, and a novel application in materials bonding

et al. 2014

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

One-dimensional nickel borate nanowhiskers: characterization, properties, and a novel application in materials bonding

et al. 2014

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“…A significant amount of work has already been done regarding the preparation of colloidal nanoparticles and the investigation of their properties and applications. As for the synthesis of nickel boron nanoparticles by reverse or positive micelle technique, a limited number of reports, which basically deal with the magnetic behaviour or catalytic performance during hydrogenation reactions, are available in literature, based on our knowledge . Wen et alreported the formation of Ni‐B amorphous alloy nanoparticles in an oil in water microemulsion (o/w) (oleic acid /ethanol/ n ‐hexane/water) by the chemical reduction of Ni 2+ (NiCl 2 .6H 2 O) precursor using KaBH 4 at ambient temperature (25 °C).…”

Section: Introductionmentioning

confidence: 99%

Online monitoring and mass transfer modelling of the growth of Ni‐B nanoparticles in a reverse micelle system

2018

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The growth of Ni-B nanoparticles by chemical reduction of nickel acetate tetrahydrate (0.3M) using sodium borohydride (B/Ni ¼ 2.5 molar ratio) in CTAB/n-hexanol/water ternary reverse micelles was investigated. SEM studies showed that the synthesized nanoparticles within the reverse micelle range are more favourable in terms of microstructure and morphology. Nanoparticle growth has been controlled in the range of 0.83-5.59 nm Á h À1 by the precise adjustment of mass fraction of surfactant in the oil phase (0.22-0.47 wt%) and the overall mass fraction of the aqueous phase (0.1-0.3 wt%) values. Particle growth was measured in situ using time resolved UV-vis absorbance spectroscopy. In addition, a new correlation based on characteristic absorbance peaks of Ni-B nanoparticles at wavelengths of 285 and 230 nm has been derived for this purpose. An accuracy of about 9 % on the nanoparticle average sizes with respect to sizes measured by dynamic light scattering (DLS) was found (R 2 ¼ 0.98). A diffusion controlled growth model involving effective diffusivity of reverse micelles (D eff À RM ¼ 9.60 Â 10 À11 À 1.17 Â 10 À8 m 2 Á s À1 ) andripening parameter (K ¼ 4.57 Â 10 À21 À 1.54 Â 10 À20 m 2 Á s À1 ) was developed to describe the growth behaviour of the nanoparticles. The experimental results were very close to the experimental results with slight errors (7-10 %). Finally, TEM micrographs of Ni-B nanoparticles showed that particle growth as well as agglomeration can be effectively controlled by precise adjustment of each component in the reverse micelle technique.describe the growth behaviour of the nanoparticles. The experimental results were very close to the experimental results with slight errors (7-10 %). Finally, TEM micrographs of Ni-B nanoparticles showed that particle growth as well as agglomeration can be effectively controlled by precise adjustment of each component in the reverse micelle technique.The metal, metal sulphide,

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“…Micellar media has been used to synthesize nanoparticles of nickel and some other metal nanoparticles have been effectively arranged through this delicate format strategy . Regarding the synthesis of nickel boron nanoparticles by reverse or positive microemulsion technique, a limited number of studies are available in the literature, which deal primarily on magnetic behaviour or catalytic performance during hydrogenation reactions . In 2007, Wen et al reported a formation of Ni‐B shapeless compound nanoparticles in positive microemulsion (o/w: sodium dodecyl‐l‐sulphate/ethanol/ n ‐hexane/water) by chemical reduction of Ni 2+ (NiCl 2 .6H 2 O) precursor with KaBH 4 at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Size‐controlled synthesis of Ni‐B nanoparticles by applying statistical experimental design in reverse micelles technique

Bahmanyar

Nikazar

2017

Can J Chem Eng

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This work focuses on the size-controlled preparation of Ni-B nanoparticles by chemical reduction of nickel acetate with sodium borohydride in the ternary reverse micelles of cetyl trimethyl ammonium bromide (CTAB)/n-hexanol/water. A response surface methodology (RSM) with four factors: CTAB/water (0.5-3.5 g/g); CTAB/n-hexanol (0.2-0.8 g/g); B/Ni molar ratio (1-4); and nickel salt concentration (0.075-0.525 mol/L) was used to study the mean size of nanoparticles. Based on the central composite design (CCD), a total of 32 experimental tests were performed to correlate both reagent concentrations (Ni 2þ and BH 4À ) and microemulsion compositions (surfactant/oil/water) to the size of to-be-obtained nanoparticles. The Ni-B nanoparticles were obtained with a narrow size distribution of average diameter in the range of 4.5-30.6 nm. The quadratic model developed explained adequately the non-linear nature of the modelled response (R 2 ¼ 0. 97, precision ¼ 33.19). Also the influence of effective variables on the mean size of Ni-B nanoparticles was examined simultaneously and discussed theoretically by using 3D-surface and 2D-contour plots. Finally optimization of CCD based on desirability function was performed. The optimal conditions were found to be at the surfactant/oil/water mass ratio of 34/55/11, nickel salt concentration of 0.24 mol/L, and B/Ni molar ratio of 2.23 with desirability factor of 0.98. Moreover, validation of the optimization showed that the model predictions were very close to the experimental results with slight errors (7-10 %). Finally, TEM micrographs of Ni-B nanoparticles at optimum conditions showed that by applying statistical experimental design in reverse micelle technique, not only particle size but also agglomeration could be effectively controlled.

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Controlling the size and morphology of anisotropic nanostructures of nickel borate using microemulsions and their magnetic properties

Cited by 20 publications

References 18 publications

One-dimensional nickel borate nanowhiskers: characterization, properties, and a novel application in materials bonding

One-dimensional nickel borate nanowhiskers: characterization, properties, and a novel application in materials bonding

Online monitoring and mass transfer modelling of the growth of Ni‐B nanoparticles in a reverse micelle system

Size‐controlled synthesis of Ni‐B nanoparticles by applying statistical experimental design in reverse micelles technique

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