Synthesis and characterization studies of pure and Ni doped CuO nanoparticles by hydrothermal method

Chandrasekar, M.; Subash, M.; Logambal, S.; Udhayakumar, Gayathri; Uthrakumar, R.; Inmozhi, C.; Al-onazi, Wedad A.; Al‐Mohaimeed, Amal M.; Chen, Shen‐Ming; Kanimozhi, K.

doi:10.1016/j.jksus.2022.101831

Cited by 42 publications

(12 citation statements)

References 45 publications

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“…On the whole, all the synthesized compositions exhibit S-hysteresis shape with different saturation magnetization and coercivity values, Table 2. The M-H relation of 0%TC powder illustrates full ferromagnetic performance with saturation magnetization of 0.045 emu/g and coercivity of 150 Oe, attributed to the uncompensated spins on the CuO surface [66,67]. Upon incorporation of 2 wt% (Mn, Fe, Co, Ni) into CuO structure (2%TC), the ferromagnetic performance converts to nearly superparamagnetic with coercivity value close to zero (14 Oe).…”

Section: Magnetic Properties Analysismentioning

confidence: 99%

High dielectric-energy storage and ferromagnetic-superparamagnetic properties: tetra-doping CuO nanocompositions

Youssef

Yakout

2023

J Mater Sci: Mater Electron

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Tetra-doping by (Mn, Fe, Co, Ni) ions strongly boosted the room temperature dielectric constant and the ferromagnetic-superparamagnetic characteristics of monoclinic CuO structure. In this study, undoped CuO, Cu0.98Mn0.005Fe0.005Co0.005Ni0.005O, Cu0.96Mn0.01Fe0.01Co0.01Ni0.01O and Cu0.94Mn0.015Fe0.015Co0.015Ni0.015O nanocompositions were synthesized through coprecipitation technique. The crystal structure analysis verified that all samples have a pure single phase, corresponding to monoclinic CuO structure. The substitution of Cu2+-sites into CuO lattice by Mn2+, Fe2+/3+, Co2+ and Ni2+ ions has been deduced from the expansions of lattice constant, shifts of XRD diffraction peaks and band gap energy alteration. The additions of (Mn, Fe, Co, Ni) ions lead to the formation of homogenous distributed very fine spherical nanoparticles, especially at large concentrations of dopants (Cu0.94Mn0.015Fe0.015Co0.015Ni0.015O sample). The tetra-doping by (Mn, Fe, Co, Ni) ions reduced the intensity of the diffuse reflectance alongside red shifted the absorption edge and the band gap energy of monoclinic CuO structure. Cu0.98Mn0.005Fe0.005Co0.005Ni0.005O exhibits a high relative permittivity value of 6096 at low frequency of 42 Hz with small dielectric loss tangent (tan δ) compared to pure one. The tetra-doping by (Mn, Fe, Co, Ni) dopants induced excellent intrinsic ferromagnetic and superparamagnetic hysteresis loops into monoclinic CuO structure with full saturation loops shape and variable coercivity values.

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Section: Magnetic Properties Analysismentioning

confidence: 99%

High dielectric-energy storage and ferromagnetic-superparamagnetic properties: tetra-doping CuO nanocompositions

Youssef

Yakout

2023

J Mater Sci: Mater Electron

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“…Ni-based emulsions are used as a surface finish for FPCBs, especially to protect against oxidation at soldering sites which is the source of NiO doping in the CuO nanomaterial [2]. To synthesise the NiO doped nanomaterials, previous researchers used pure NiCO 3 , Ni(NO 3 ), and NiSO 4 , while in this research no extra raw materials are used for this purpose [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…2 To synthesise NiO doped nanomaterials, previous researchers used pure NiCO 3 , Ni(NO 3 ) 2 , and NiSO 4 , whereas in this research no extra raw materials were used for this purpose. [29][30][31][32][33] An additional doping agent for NiO doping was not used in this research which has made the process costeffective. For the rst time, waste FPCBs were utilised to produce NH 3 sensors.…”

Section: Introductionmentioning

confidence: 99%

Utilising problematic waste to detect toxic gas release in the environment: fabricating a NiO doped CuO nanoflake based ammonia sensor from e-waste

2022

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“…The hydrothermal process has been widely used in the synthesis of oxide nanoparticles in recent years. Compared with other preparation processes, hydrothermally synthesized nanoparticles have high purity, good dispersibility, and controllable grain size [25]. Cui prepared MgO nanosheets with a two-dimensional flaky porous structure by simple hydrothermal process, which has a larger specific surface area than commercial MgO nanoparticles [26].…”

Section: Introductionmentioning

confidence: 99%

Transesterification of Glycerol to Glycerol Carbonate over Mg-Zr Composite Oxide Prepared by Hydrothermal Process

Zhao

Xue

et al. 2022

Nanomaterials

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A series of Mg-Zr composite oxide catalysts prepared by the hydrothermal process were used for the transesterification of glycerol (GL) with dimethyl carbonate (DMC) to produce glycerol carbonate (GC). The effects of the preparation method (co-precipitation, hydrothermal process) and Mg/Zr ratio on the catalytic performance were systematically investigated, and the deactivation of the catalyst was also explored. The Mg-Zr composite oxide catalysts were characterized by XRD, TEM, TPD, N2 adsorption-desorption, and XPS. The characterization results showed that compared with the co-precipitation process, the catalyst prepared by the hydrothermal process has a larger specific surface area, smaller grain size, and higher dispersion. Mg1Zr2-HT catalyst calcined at 600 °C in a nitrogen atmosphere exhibited the best catalytic performance. Under the conditions of reaction time of 90 min, reaction temperature of 90 °C, catalyst dosage of 3 wt% of GL, and GL/DMC molar ratio of 1/5, the GL conversion was 99% with 96.1% GC selectivity, and the yield of GC was 74.5% when it was reused for the fourth time.

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Synthesis and characterization studies of pure and Ni doped CuO nanoparticles by hydrothermal method

Cited by 42 publications

References 45 publications

High dielectric-energy storage and ferromagnetic-superparamagnetic properties: tetra-doping CuO nanocompositions

High dielectric-energy storage and ferromagnetic-superparamagnetic properties: tetra-doping CuO nanocompositions

Utilising problematic waste to detect toxic gas release in the environment: fabricating a NiO doped CuO nanoflake based ammonia sensor from e-waste

Transesterification of Glycerol to Glycerol Carbonate over Mg-Zr Composite Oxide Prepared by Hydrothermal Process

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