Structure and magnetic properties of flower-like α-NiS nanostructures

Tang, Chunjuan; Zang, Chunhe; Su, Jianfeng; Zhang, Dongmei; Li, Guanghai; Zhang, Yongsheng; Yu, Ke

doi:10.1016/j.apsusc.2010.11.030

Cited by 32 publications

(19 citation statements)

References 19 publications

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“…Among these phases, NiS has attracted increasing attention recently for its attractive electrochemical [1−2], high-performance supercapacitor [3], optical [4], electrocatalytic [5], and magnetic properties [6], which promote its application in various fields. Among other applications, it has been used as a cathode material in rechargeable lithium or secondary batteries [7−11], as a supercapacitor [3] in dye-sensitized solar cells [5,12−13], as a photocatalyst [14−15], and as an improved Na-and Li-storage material [16−17].…”

Section: Introductionmentioning

confidence: 99%

Large-scale synthesis of nickel sulfide micro/nanorods via a hydrothermal process

Yin

Han

Zhou

et al. 2015

Int J Miner Metall Mater

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Rhombohedral-phase NiS micro/nanorods were synthesized on a large scale through a hydrothermal method using NiCl 2 ·6H 2 O and thiourea crystals as starting precursors. Recrystallized thiourea was observed to play an important role in the formation of micro/nanosized rods and flower-like structures. The molar ratio and reaction temperature of the precursors influenced the morphology and phase of NiS products. Pure rhombohedral NiS micro/nanorods were obtained on a large scale when the molar ratio between NiCl 2 ·6H 2 O and thiourea crystals was fixed at 2:1, and the mixture was heated at 250°C for 5 h. Flower-like NiS nanostructures were formed when the molar ratio between NiCl 2 ·6H 2 O and thiourea crystals was maintained at 1:1. The Raman and Fourier-transform infrared (FTIR) spectra of the as-prepared rhombohedral NiS micro/nanorods were collected, and their magnetic properties were investigated. The results showed that the FTIR absorption peaks of the as-prepared product are located at 634 cm −1 and their Raman peaks are located at 216 and 289 cm −1 ; the as-prepared NiS micro/nanorods exhibited weak ferromagnetic behavior due to the size effect.

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Section: Introductionmentioning

confidence: 99%

Large-scale synthesis of nickel sulfide micro/nanorods via a hydrothermal process

Yin

Han

Zhou

et al. 2015

Int J Miner Metall Mater

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“…This includes the search for possible applications of the material in the field of nanotechnology. Some applications are determined by the ultra-violet visible and infra-red optical applications of the nanomaterials due to possible band gap tuning as a result of a quantum confinement effect [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]. Electrical, optical and magnetic properties are some of the notable properties of these materials.…”

Section: Introductionmentioning

confidence: 99%

Observation of the structural, optical and magnetic properties during the transformation from hexagonal NiS nano-compounds to cubic NiO nanostructures due to thermal oxidation

Linganiso

Mwakikunga

Coville

et al. 2015

Journal of Alloys and Compounds

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“…In recent years, a variety of metal sulfides nanostructures have been widely investigated due to their potential applications in energy storage and conversion devices, light-emitting diodes, photocatalytic and electrocatalytic reactions, sensors, thermoelectric devices, and memory devices. [21][22][23] In this work, we report the facile synthesis of NiS hierarchical flower-like nanostructures using a solvothermal route. The electrocatalytic performances of these NiS nanostructures were also investigated.…”

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confidence: 99%

“…Although numerous NiS compounds have been prepared using various morphologies such as: nanoframes, 14 hollow spheres, 15 core-shell structure, 16 nanorods, 17 nanoflake arrays, 18 nanosheets, 19 urchin-like micro/nanostructures, 20 the synthesis of hierarchical flower-like NiS has been limited. [21][22][23] In this work, we report the facile synthesis of NiS hierarchical flower-like nanostructures using a solvothermal route. The electrocatalytic performances of these NiS nanostructures were also investigated.…”

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confidence: 99%

Facile Synthesis of a Nickel Sulfide (NiS) Hierarchical Flower for the Electrochemical Oxidation of H₂O₂and the Methanol Oxidation Reaction (MOR)

Zhang

et al. 2017

J. Electrochem. Soc.

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The synthesis of a novel hierarchical flower-like NiS via a solvothermal method for the electrochemcial oxidation of H 2 O 2 on a carbon paste electrode with high catalytic activity for the (MOR) in an alkaline medium has been reported. Novel nickel sulfide (NiS) hierarchical flower-like structures were characterized by X-ray diffraction, scanning electron microscope, and transmission electron microscopy. A carbon paste electrode was modified with the as-prepared hierarchical flower-like NiS, resulting in a high electrocatalytic activity toward the oxidation of H 2 O 2 . The NiS-modified electrode was used for H 2 O 2 sensing, which was achieved over a wide linear range from 0.5 μM to 1.37 mM (I/μA = −0.19025 + 0.06094 C/mM) with a low limit of detection (LOD) of 0.3 μM and a limit of quantitation (LOQ) of 0.8 μM. The hierarchical flower-like NiS also exhibited a high electrocatalytic activity for the methanol oxidation reaction (MOR) in an alkaline medium with a high tolerance toward the catalyst-poisoning species generated during the MOR. The MOR proceeded via the direct electrooxidation of methanol on the oxidized NiS surface layer because the oxidation peak potential of the MOR was more positive than that of the oxidation of NiS. In recent years, a variety of metal sulfides nanostructures have been widely investigated due to their potential applications in energy storage and conversion devices, light-emitting diodes, photocatalytic and electrocatalytic reactions, sensors, thermoelectric devices, and memory devices. [21][22][23] In this work, we report the facile synthesis of NiS hierarchical flower-like nanostructures using a solvothermal route. The electrocatalytic performances of these NiS nanostructures were also investigated.Hydrogen peroxide (H 2 O 2 ) has attracted a great attention due to its importance as a reactive oxygen species and its involvement in chemical, biological, food-processing, medical, diagnostic, and environmental related fields. 35 have been employed for this purpose, the preparation of the hierarchical nanostructure with high surface area is still a challenge for fabricating an efficient sensing platform for H 2 O 2 .Pt-based materials are currently the most common electrocatalysts used as anodes in direct methanol fuel cells (DMFC) due to their high electrocatalytic activities. 36,37 However, Pt suffers from a high price and tendency to be poisoned by CO that occupies the active sites of the Pt via adsorption and block the transportation of z E-mail: baiqingyuan1981@126.com; c.fernandez@rgu.ac.uk methanol in its oxidation, limiting its utility in commercial applications. Therefore, the development of cost effective catalysts is highly desirable. Ni-based compounds are interesting alternatives to Pt due to their relative low costs and high electrocatalytic activity, which have attracted considerable recent attention 38,39 due to the Ni (II)/Ni (III) redox reactions. 40 To the best of our knowledge, this is the first time that the synthesis of a novel hierarchical flower-like NiS v...

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Structure and magnetic properties of flower-like α-NiS nanostructures

Cited by 32 publications

References 19 publications

Large-scale synthesis of nickel sulfide micro/nanorods via a hydrothermal process

Large-scale synthesis of nickel sulfide micro/nanorods via a hydrothermal process

Observation of the structural, optical and magnetic properties during the transformation from hexagonal NiS nano-compounds to cubic NiO nanostructures due to thermal oxidation

Facile Synthesis of a Nickel Sulfide (NiS) Hierarchical Flower for the Electrochemical Oxidation of H₂O₂and the Methanol Oxidation Reaction (MOR)

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Structure and magnetic properties of flower-like α-NiS nanostructures

Cited by 32 publications

References 19 publications

Large-scale synthesis of nickel sulfide micro/nanorods via a hydrothermal process

Large-scale synthesis of nickel sulfide micro/nanorods via a hydrothermal process

Observation of the structural, optical and magnetic properties during the transformation from hexagonal NiS nano-compounds to cubic NiO nanostructures due to thermal oxidation

Facile Synthesis of a Nickel Sulfide (NiS) Hierarchical Flower for the Electrochemical Oxidation of H2O2and the Methanol Oxidation Reaction (MOR)

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Facile Synthesis of a Nickel Sulfide (NiS) Hierarchical Flower for the Electrochemical Oxidation of H₂O₂and the Methanol Oxidation Reaction (MOR)