Structure and magnetic properties of Cu-Ni alloy nanoparticles prepared by rapid microwave combustion method

Mary, J. Arul; Manikandan, A.; Kennedy, L. John; Bououdina, M.; Sundaram, R.; Vijaya, J. Judith

doi:10.1016/s1003-6326(14)63214-3

Cited by 70 publications

(18 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, the freeing of carbon oxides from the bulk of the sample during the calcination step might be accountable for the creation of the visible porous texture of the alloy [8]. As can be noted in Figure 8D, the Ni-Cu alloy exhibits a lobe coral sponge-like morphology with a strong agglomeration, with the particle size ranging from 10 to 30 nm [13]. The giant barrel coral sponge-like surface morphology seems to be due to the existence of Ni in bimetallic alloys, irrespective of the second metal.…”

Section: Resultsmentioning

confidence: 99%

“…In the past few years, a great number of efforts have been made by researchers to synthesize bimetallic alloys. Transition metals like Ni, Co, Fe, and Cu have attracted interest because they are inexpensive and have a high magnetization capacity [13]. Furthermore, bimetallic alloys such as Ni-Co, Ni-Fe, and Ni-Cu have become very attractive to researchers due to their properties and the diversity of applications when compared with their individual mono-metal counterparts.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Non-Supported Nickel-Based Coral Sponge-Like Porous Magnetic Alloys for Catalytic Production of Syngas and Carbon Bio-Nanofilaments via a Biogas Decomposition Approach

et al. 2018

View full text Add to dashboard Cite

Porous Ni, Ni-Co, Ni-Fe, and Ni-Cu magnetic alloys with a morphology similar to a giant barrel sponge were synthesized via a facile co-precipitation procedure and then by hydrogen reduction treatment. For the first time, the non-supported alloys with their unique morphology were employed in catalytic biogas decomposition (CBD) at a reaction temperature of 700 °C and 100 mL min−1 to produce syngas and carbon bio-nanofilaments, and the catalysts’ behavior, CH4 and CO2 conversion, and the carbon produced during the reaction were investigated. All of the equimolar alloy catalysts showed good activity and stability for the catalytic biogas decomposition. The highest sustainability factor (0.66) and carbon yield (424%) were accomplished with the Ni-Co alloy without any significant inactivation for six hours, while the highest carbon efficiency of 36.43 was obtained with the Ni-Co catalyst, which is considered relatively low in comparison with industry standards, indicating a low carbon production process efficiency, possibly due to the relatively high biogas flow rate. The higher activity of the Ni-Co alloy catalyst was associated with the synergistic impact between nickel and cobalt, allowing the catalyst to maintain a high stability throughout the reaction period. Moreover, highly uniform, interwoven carbon bio-nanofilaments with a parallel and fishbone structure were achieved.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Non-Supported Nickel-Based Coral Sponge-Like Porous Magnetic Alloys for Catalytic Production of Syngas and Carbon Bio-Nanofilaments via a Biogas Decomposition Approach

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The magnetic nanoparticles made up of elements having magnetic properties, like cobalt, iron, and nickel show immense potential in many fields such as optical fibre, data storage, tissue targeting, biomedical and medicinal fields etc. [ 15 , 16 , 17 , 18 ]. They possess the unique property of superparamagnetism due to their very small particle size [ 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of solvents on morphology, magnetic and dielectric properties of (α-Fe 2 O 3 @SiO 2 ) core-shell nanoparticles

Joshi

Pant

Arora

et al. 2017

Heliyon

View full text Add to dashboard Cite

Present work describes the formation of α-Fe2O3@SiO2 core shell structure by systematic layer by layer deposition of silica shell on core iron oxide nanoparticles prepared via various solvents. Sol-gel method has been used to synthesize magnetic core and the dielectric shell. The average crystallite size of iron oxide nanoparticles was calculated ∼20 nm by X-ray diffraction pattern. Morphological study by scanning electron microscopy revealed that the core-shell nanoparticles were spherical in shape and the average size of nanoparticles increased by varying solvent from methanol to ethanol to isopropanol due to different chemical structure and nature of the solvents. It was also observed that the particles prepared by solvent ethanol were more regular and homogeneous as compared to other solvents. Magnetic measurements showed the weak ferromagnetic behaviour of both core α-Fe2O3 and silica-coated iron oxide nanoparticles which remained same irrespective of the solvent chosen. However, magnetization showed dependency on the types of solvent chosen due to the variation in shell thickness. At room temperature, dielectric constant and dielectric loss of silica nanoparticles for all the solvents showed decrement with the increment in frequency. Decrement in the value of dielectric constant and increment in dielectric loss was observed for silica coated iron oxide nanoparticles in comparison of pure silica, due to the presence of metallic core. Homogeneous and regular silica layer prepared by using ethanol as a solvent could serve as protecting layer to shield the magnetic behaviour of iron oxide nanoparticles as well as to provide better thermal insulation over pure α-Fe2O3 nanoparticles.

show abstract

“…Microwave (MW) heating has the characteristic of quick velocity, selectivity heating, nonpollution and convenient to achieve automatic control, and has been widely employed in metallurgy, chemical industry, medicine and food areas as a kind of green high-efficient method [9][10][11][12][13]. Deng Liang [14] added the Ce, Nd, Gd, Y, Dy and Lu into the amorphous alloy of Cu-Zr-Al to research the product performance, and the results indicated that the glass transition temperature is reduced, performance of glass formation and alloy mechanical properties are improved through adding the rare earth elements (REEs).…”

Section: Introductionmentioning

confidence: 99%

Study on the calcination experiments of rare earth carbonates using microwave heating

Lin

Zhang

Yin

et al. 2015

Green Processing and Synthesis

View full text Add to dashboard Cite

The heating behavior and effect of experimental parameters like holding time, calcination temperature and microwave power on the weight loss of the mixed rare earth carbonate using microwave heating have been studied, also characterized by X-ray diffraction, thermogravimetry-differential scanning calorimetry, scanning electron microscopy (SEM), particle analysis and Fourier transform infrared (FT-IR). The results show the following: rare earth oxides are obtained at 850°C for holding 1 h; FT-IR analysis indicates that the vibration absorption peak of carbonate disappears after calcination using microwave, confirming the feasibility of microwave calcination for the rare earth carbonates; SEM shows that the rare earth oxides have the characteristics of better and finer particles, have better dispersion and have surface that is more loose and porous than that of products using conventional calcination; particle analysis indicates that average size (D

show abstract

Structure and magnetic properties of Cu-Ni alloy nanoparticles prepared by rapid microwave combustion method

Cited by 70 publications

References 25 publications

Non-Supported Nickel-Based Coral Sponge-Like Porous Magnetic Alloys for Catalytic Production of Syngas and Carbon Bio-Nanofilaments via a Biogas Decomposition Approach

Non-Supported Nickel-Based Coral Sponge-Like Porous Magnetic Alloys for Catalytic Production of Syngas and Carbon Bio-Nanofilaments via a Biogas Decomposition Approach

Effect of solvents on morphology, magnetic and dielectric properties of (α-Fe 2 O 3 @SiO 2 ) core-shell nanoparticles

Study on the calcination experiments of rare earth carbonates using microwave heating

Contact Info

Product

Resources

About