Structural and thermal characterization of NixZn1−xAl2O4 synthesized by the polymeric precursor method

Queiroz, Renan M.; Coelho, Tiago L.; Queiroz, Isabella M.; Pires, Luiza H. O.; Santos, I. M. G.; Zamian, José Roberto; Filho, Geraldo Narciso da Rocha; Costa, Carlos Emmerson Ferreira da

doi:10.1007/s10973-015-5056-4

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…Figure 2 shows the infrared spectrum with Fourier transform (FT-IR) for the synthesized samples. Spinel is characterized by having three bands in the 800 to 450 cm −1 range, which confirms the formation of the structure, as these bands are typical of interactions between Al-O at octahedral sites and Zn-O at tetrahedral sites [12,25,34]. The bands located in the 400 to 500 cm −1 range are characteristic of the vibrations referring to the interactions between metals and oxygen occupying octahedral sites, and the bands in the 550 to 700 cm −1 range are characteristic bands of the vibrations between the metal and oxygen occupying tetrahedral sites [15].…”

Section: Infrared Absorption Spectroscopymentioning

confidence: 58%

“…Wei and Chen [36], using the sol-gel method, obtained ZnAl 2 O 4 with a surface area of 58 m 2 g −1 and pore volume of 0.0029 cm 3 g −1 . Queiroz et al [34] synthesized ZnAl 2 O 4 using the polymeric precursor method and obtained a very low surface area ranging from 8 to 77 m 2 g −1 and a total pore volume ranging from 0.004 to 0.027 cm 3 g −1 , respectively.…”

Section: N 2 Adsorption-desorption Isothermsmentioning

confidence: 99%

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Synthesis of Mesoporous Zn1−xMxAl2O4 Substituted by Co2+ and Ni2+ Ions and Application in the Photodegradation of Rhodamine B

et al. 2020

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A new mesoporous Zn1-xMxAl2O4 photocatalyst was prepared using the metal-chitosan complexation method with different degrees of Zn2+ cation substitution with cobalt and nickel ions (M = Co2+ and Ni2+). Characterization using X-ray diffraction (XRD), Infrared absorption spectrometry (FTIR), energy dispersion spectroscopy (EDS), diffuse reflectance spectrometry (DRS), scanning electron miscoscopy (SEM), transmission electron miscroscopy (TEM), N2 adsorption- desorption isotherms using the Barrett-Joyner-Halenda (BJH) method, thermogravimetric analysis (TG) and differential thermal analysis (DTA) confirmed the formation of the spinel phase and high purity for all samples. N2 adsorption/desorption and size pore distribution confirmed the high surface area. The photocatalytic activity of Zn1-xMxAl2O4 and the effect of replacing Zn2+ ions with Ni2+ and Co2+ on the degradation of rhodamine B under ultraviolet light were studied in detail. The sample containing 0.1 mol of cobalt had the highest removal rate reaching 83%, favored by surface area and material bandgap (109 m2 g−1 and 2.19 eV, respectively).

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Section: Infrared Absorption Spectroscopymentioning

confidence: 58%

Section: N 2 Adsorption-desorption Isothermsmentioning

confidence: 99%

Synthesis of Mesoporous Zn1−xMxAl2O4 Substituted by Co2+ and Ni2+ Ions and Application in the Photodegradation of Rhodamine B

et al. 2020

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“…7b), indicating that these phenomena are produced by the same mechanisms. In this case, mechanisms such as hydrogen ions, electric dipoles, electron cloud oscillating on the nanoparticle surface and polymeric chain can also be considered [10].…”

Section: Resultsmentioning

confidence: 99%

“…Some typical examples of polymer/ceramic composites and nanocomposites of technological interest are: (1) composites formed by paraelectric particles of Ba 0.6 Sr 0.4 TiO 3 with different size and particle concentration dispersed in a low-loss dielectric matrix that can be applied in microwave devices for wireless telecommunications [5]; (2) hybrid composites based on ferroelectric and piezoelectric crystal particles, randomly distributed in a polymer matrix of epoxy resin represent a novel class of materials with potential to be applied as integrated capacitors, acoustic emission sensors, smart skins and leakage current controllers [6]; (3) carbon nanotubes and carbon black embedded in thermoplastic and elastomeric matrices producing significant mechanical, electric, anti-aging and thermal improvements in the composites and nanocomposites making them suitable for production of automobile pieces, footwear and use in pneumatic industries [7,8]; and (4) magnetic composite and nanocomposites based on ferrites, iron and nickel oxides in concentrations of up to 600 phr dispersed in polymeric matrices that can be used as flexible microwave absorbers, in wireless data communication, in local area network, satellite television and heating systems [3,9,10].…”

Section: Introductionmentioning

confidence: 99%

Evolution of thermal properties of natural rubber nanocomposites functionalized by nickel–zinc ferrite and potassium strontium niobate nanopowders

Bellucci

Almeida

Agostini

et al. 2016

J Therm Anal Calorim

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Several composites and nanocomposites based on a polymeric matrix and ceramic fillers are being pursued for use as multifunctional and innovative materials. Nevertheless, there is a series of challenges to be solved in this area such as the understanding of the role of interfaces and the synergy between matrix and fillers. In this work, vulcanized natural rubber nanocomposites were prepared with different concentrations of two kinds of ceramic nanoparticles, potassium strontium niobate (KSr 2 Nb 5 O 15 or KSN) and nickel-zinc ferrite (Ni 0.5 Zn 0.5 Fe 2 O 4 or NZF), synthesized by a chemical method known as the modified polyol method. Morphological and thermal characterizations were carried out by AFM, TG/DTG, TG/FTIR and DSC. The thermal properties of nanocomposites were compared and discussed as functions of concentration, type and surface of nanoparticles. The results obtained suggest that the base concentration for both types of nanoparticles inside the polymer matrix volume greatly adds to the increase in thermal stability up to 11 % and the glass transition temperature up to 10°C. A similar evolution for the glass transition temperature (T g), thermal stability temperature (T S) and dielectric permittivity (e 0) was identified, suggesting that these phenomena are mainly dominated by the same mechanisms. These results point to the possibility for the thermal parameter modulation in magnetic and ferroelectric nanocomposites by means of a suitable control of concentration and properties of the KSN and NZF nanoparticles. Keywords Nickel-zinc ferrite Á Potassium strontium niobate Á Functionalized nanocomposites Á Thermal properties Á Thermal stability Á Glass transition temperature & Aldo Eloizo Job

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“…Thermal analysis is a useful tool to characterize the formation of spinel phases from different systems, which is reported in the literature [24,25]. Figure 3 presents DTA/TG/DTG curves together with mass spectra for Al 2 O 3 /Ni green body.…”

Section: Resultsmentioning

confidence: 99%

Characterization of composites containing NiAl2O4 spinel phase from Al2O3/NiO and Al2O3/Ni systems

Zygmuntowicz

Wiecińska

Miazga

et al. 2016

J Therm Anal Calorim

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This paper focused on the characterization of the composites containing nickel aluminate spinel from Al 2 O 3 /NiO and Al 2 O 3 /Ni systems. The composites were prepared by die pressing of powders and subsequent sintering of green bodies in air atmosphere. Composites were characterized by XRD, SEM, EDS and DTA/TG/MS analyses. The physical properties of the composites were measured by Archimedes method. Quantitative description of the composites microstructure was made on the basis of SEM images using computer image analysis. The XRD studies and SEM observations of composites confirmed the presence of two phases Al 2 O 3 and NiAl 2 O 4 in the whole volume of samples from both systems. Spinel phase was evenly distributed throughout the volume of the material. Morphology of NiAl 2 O 4 obtained from both systems was characterized by the presence of voids. The DTA/TG/MS measurements showed the characteristics of organic binder decomposition and type of gases released to the atmosphere during thermal treatment. Moreover, the DTA/TG analysis showed the temperature of spinel-phase formation for both systems. It was found that the spinel-phase NiAl 2 O 4 formation retards the process of densification. Therefore, it can be concluded that densification of samples with spinel phase depends mainly on the volume of spinel phase in composite material and does not depend on the substrates used to prepare spinel phase. The values of the selected properties of Al 2 O 3 -Ni-and Al 2 O 3 -NiO-based materials confirmed that the physical properties depend on the type of substrates used in the fabrication of composites. The type of powder influences the open porosity of samples. For composites produced using NiO powder, open porosity is lower than for samples formed with nickel powder.

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Structural and thermal characterization of NixZn1−xAl2O4 synthesized by the polymeric precursor method

Cited by 9 publications

References 26 publications

Synthesis of Mesoporous Zn1−xMxAl2O4 Substituted by Co2+ and Ni2+ Ions and Application in the Photodegradation of Rhodamine B

Synthesis of Mesoporous Zn1−xMxAl2O4 Substituted by Co2+ and Ni2+ Ions and Application in the Photodegradation of Rhodamine B

Evolution of thermal properties of natural rubber nanocomposites functionalized by nickel–zinc ferrite and potassium strontium niobate nanopowders

Characterization of composites containing NiAl2O4 spinel phase from Al2O3/NiO and Al2O3/Ni systems

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