Surfactant effects on pH-controlled synthesis of nickel hydroxides

Coudun, Corinne; Grillon, F.; Hochepied, Jean-François

doi:10.1016/j.colsurfa.2006.01.018

Cited by 38 publications

(30 citation statements)

References 29 publications

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“…4a and b, plenty of non-uniform aggregates and flocculation of tiny particles are observed in the C-a-Ni(OH) 2 sample. However, its morphology is different from that reported in the literature [23][24][25][26]. In our case, microwave dielectric heating is used for the purpose of homogeneous alkalization.…”

Section: Resultsmentioning

confidence: 80%

“…It suggested that one single DS-aNi(OH) 2 -0.05 M crystallite is stacked by approximately three layers (four brucite layers + three DS À layers (one DS À layer here means one DS À bilayer) $7.84 nm). Further, the turbostratic character of a-Ni(OH) 2 can be concluded from the asymmetric (1 0 1) peak at 2h = 33.80°, as indicated in the previous reports [23][24][25][26].…”

Section: Resultsmentioning

confidence: 91%

“…In particular, special care has to be taken for synthesis of a-Ni(OH) 2 since their morphology is relatively difficult to control in an uniform manner. Big agglomerates and crumpled films of a-Ni(OH) 2 with poor uniformity were observed [23][24][25][26]. Nevertheless, only few reports successfully control the uniform morphology, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Control of uniform nanostructured α-Ni(OH)2 with self-assembly sodium dodecyl sulfate templates

Cheng

Hwang

2009

Journal of Colloid and Interface Science

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Section: Resultsmentioning

confidence: 80%

Section: Resultsmentioning

confidence: 91%

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Control of uniform nanostructured α-Ni(OH)2 with self-assembly sodium dodecyl sulfate templates

Cheng

Hwang

2009

Journal of Colloid and Interface Science

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“…(i) Surfactant-intercalated α-derivative structures α-Ni(OH) 2 -like materials in which the intercalated water is replaced with surfactant molecules have been prepared using cetyltrimethylammonium bromide [100], dodecyl sulfate [82,92,[100][101][102][103][104][105][106], dodecylbenzene sulfonate [103], p-aminobenzoate [18] and Tween 80 [100]. The polar or ionic regions of the surfactant molecules interact with the Ni(OH) 2 sheets and the non-polar regions fill the interlayer space.…”

Section: (C) α-Derivative Structuresmentioning

confidence: 99%

Nickel hydroxides and related materials: a review of their structures, synthesis and properties

et al. 2015

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This review article summarizes the last few decades of research on nickel hydroxide, an important material in physics and chemistry, that has many applications in engineering including, significantly, batteries. First, the structures of the two known polymorphs, denoted as α-Ni(OH) 2 and β-Ni(OH) 2 , are described. The various types of disorder, which are frequently present in nickel hydroxide materials, are discussed including hydration, stacking fault disorder, mechanical stresses and the incorporation of ionic impurities. Several related materials are discussed, including intercalated α-derivatives and basic nickel salts. Next, a number of methods to prepare, or synthesize, nickel hydroxides are summarized, including chemical precipitation, electrochemical precipitation, sol-gel synthesis, chemical ageing, hydrothermal and solvothermal synthesis, electrochemical oxidation, microwaveassisted synthesis, and sonochemical methods. Finally, the known physical properties of the nickel hydroxides are reviewed, including their magnetic, vibrational, optical, electrical and mechanical properties. The last section in this paper is intended to serve as a summary of both the potentially useful properties of these materials and the methods for the identification and characterization of 'unknown' nickel hydroxide-based samples.

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“…2 Moreover, it is reported that operating temperature and agitation speeds also influenced surface shapes and tapping densities of product particles. 3,4,6,7,8 Although changes in mean particle size and PSDs of Ni(OH) 2 with operating conditions for continuous precipitations were indicated, the Ni 2+ concentrations in suspended solutions are not pointed out. Moreover, when NH 4 + exists in an Ni(OH) 2 suspended solution the formation behaviors of Ni(OH) 2 precipitates are not revealed.…”

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confidence: 95%

Continuous Precipitation of Nickel Hydroxide by Addition of Ammonium Ions

Funakoshi

Yoshizawa

Matsuoka

2016

Crystal Growth & Design

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Spherical and dense nickel hydroxide, Ni(OH) 2 , particles are produced by addition of ammonia or ammonium ions, NH 4 + , using a continuous precipitation. In this study, the nickel ion, Ni 2+ , concentrations and the NH 4 + concentrations in a suspended solution for the continuous precipitation of Ni(OH) 2 are examined, and the formation behaviors of spherical and dense Ni(OH) 2 particles are discussed by the relations between the Ni 2+ and NH 4 + concentrations. When NH 4 + was supplied into a suspended solution during the continuous precipitation of Ni(OH) 2 , Ni 2+ was present in a steady state and the Ni 2+ concentrations changed with the NH 4 + concentrations in a feed solution, with the solution pH and the residence times of suspended solutions in a crystallizer. The ratios of the NH 4 + concentrations to the Ni 2+ in a solution at steady state were different from the coordination number of NH 3 in a nickel ammine complex. Formation of Ni(OH) 2 precipitates when adding NH 4 + is discussed by the relations between the Ni 2+ and the NH 4 + concentrations in suspended solution for continuous and batch operations.is a type of cathode active material for a nickel−hydrogen secondary battery. Ni(OH) 2 precipitates are deposited by mixing of nickel sulfate, NiSO 4 , and sodium hydroxide, NaOH, aqueous solutions + → ↓+ NiSO 2NaOH Ni(OH) Na SO 4 2 2 4(1)The Ni(OH) 2 precipitates obtained by the reaction of a NiSO 4 aqueous solution with a NaOH solution are always amorphous and porous, resulting in lower apparent density. 1 On the contrary, when aqueous ammonia, NH 3 , is added into a suspension during a continuous precipitation, Ni(OH) 2 precipitates become spherical and dense. In this case, nickel ions, Ni 2+ , would bond with NH 3 and a nickel ammine complex would be formed. Then, nickel ammine complexes would be decomposed and Ni(OH) 2 precipitates would be formed by reaction with hydroxide ions, OH − , in a solution.Effects of operating conditions on the properties of products such as mean particle size, particle size distributions, PSDs, and apparent density are experimentally examined. When the amount of ammonium ion, NH 4 + , added into a suspended solution increased, mean particle size became larger, 2 PSDs became broader, 3 tapping density became higher, and nucleation rates of Ni(OH) 2 particles were reduced. 4 In addition, at high pH values both particle and crystallite sizes became smaller, 5,6 probably because of the enhancement of nucleation and deceleration of growth. 2 Moreover, it is reported that operating temperature and agitation speeds also influenced surface shapes and tapping densities of product particles. 3,4,6,7,8 Although changes in mean particle size and PSDs of Ni(OH) 2 with operating conditions for continuous precipitations were indicated, the Ni 2+ concentrations in suspended solutions are not pointed out. Moreover, when NH 4 + exists in an Ni(OH) 2 suspended solution the formation behaviors of Ni(OH) 2 precipitates are not revealed. The purposes of the present study are to clarify the...

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Surfactant effects on pH-controlled synthesis of nickel hydroxides

Cited by 38 publications

References 29 publications

Control of uniform nanostructured α-Ni(OH)2 with self-assembly sodium dodecyl sulfate templates

Control of uniform nanostructured α-Ni(OH)2 with self-assembly sodium dodecyl sulfate templates

Nickel hydroxides and related materials: a review of their structures, synthesis and properties

Continuous Precipitation of Nickel Hydroxide by Addition of Ammonium Ions

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