Characterization of ZnO–TiO2 and zinc titanate nanoparticles synthesized by hydrothermal process

Arin, Jirapong; Thongtem, Somchai; Phuruangrat, Anukorn; Thongtem, Titipun

doi:10.1007/s11164-016-2818-y

Cited by 38 publications

(17 citation statements)

References 25 publications

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“…Generally, the particles are nearly spherical with particle sizes of about 60 and 130 nm and exhibited a dense aggregation. A similar result was obtained by Arin et al [33] for zinc titanates synthesized via hydrothermal method.…”

Section: D Morphological Studysupporting

confidence: 88%

Zinc Titanate Nanopowders. Synthesis and Characterization

Gabal

Angari

2021

Preprint

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Zinc titanates nanopowders viz.; Zn2TiO4, ZnTi3O8 and ZnTiO3 were synthesized through the thermal decomposition course of ZnC2O4.2H2O-TiO2 precursor (1:1 mole ratio), prepared via a new co-precipitation method up to 900oC. Thermogravimetric measurement (TG) was utilized to characterize the precursor decomposition while X-ray diffraction (XRD), Fourier transform infra-red (FT-IR) were used to characterize the decomposition products as well as the phase transitions at different temperatures. XRD revealed the starting of titanates formation at 700oC via detecting Zn2TiO4 along with ZnO and TiO2 (anatase) diffraction peaks. By increasing the calcination temperature to 800oC, the ZnO content vanished with the appearing of Zn2Ti3O8 besides ZnTi2O4 and impurities of TiO2 (anatase). Finally at 900oC, the Zn2Ti3O8 content was decomposed into ZnTiO3. Nitrogen adsorption-desorption isotherm of the calcined precursor at 900oC indicated low specific surface area of 7.1 m2 g-1 in accordance with the agglomeration nature estimated via transmission electron microscopy (TEM) study. The conductivity measurements showed semiconducting behavior of the prepared titanates with ferroelectric transition in the range 200-308oC.The obtained low dielectric value suggests the uses of present titanates as a co-fired ceramic or resonator ceramics.

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Section: D Morphological Studysupporting

confidence: 88%

Zinc Titanate Nanopowders. Synthesis and Characterization

Gabal

Angari

2021

Preprint

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“…TEM image of the calcined precursors mixture at 900 °C (figure 4) exhibited an agglomeration of particles having different sizes and shapes. A similar aggregation behavior was obtained by Arin et al [36] for zinc titanates synthesized via hydrothermal method.…”

Section: Morphological Studysupporting

confidence: 84%

Zinc titanates nanopowders: synthesis and characterization

Gabal¹,

Angari²

2022

Mater. Res. Express

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Zinc titanates nanopowders viz.; Zn2TiO4, ZnTi3O8 and ZnTiO3 were synthesized through the thermal decomposition course of ZnC2O4.2H2O-TiO2 precursors mixture (1:1 mole ratio), prepared via a new co-precipitation method up to 900°C. Thermogravimetric measurement (TG) was utilized to characterize the precursors mixture decomposition while X-ray diffraction (XRD), Fourier transform infra-red (FT-IR) were used to characterize the decomposition products as well as the phase transitions at different temperatures. XRD revealed the starting of titanates formation at 700°C via detecting Zn2TiO4 along with ZnO and TiO2 (anatase) diffraction peaks. By increasing the calcination temperature to 800°C, the ZnO content vanished with the appearing of Zn2Ti3O8 besides ZnTi2O4 and impurities of TiO2 (anatase). Finally at 900°C, the Zn2Ti3O8 content was decomposed into ZnTiO3. Nitrogen adsorption-desorption isotherm of the calcined precursors mixture at 900°C indicated low specific surface area of 7.1 m2 g-1 in accordance with the agglomeration nature estimated via transmission electron microscopy (TEM) study. The conductivity measurements showed semiconducting behavior of the prepared titanates with ferroelectric transition in the range 200-308°C.The obtained low dielectric value suggests the uses of present titanates as a co-fired ceramic or resonator ceramics.

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“…This can be attributed to TiO 2 undergoing partial conversion from anatase to the rutile phase. Additionally, the formation of the ZnTiO 3 phase also contributes to the reduction of the surface area [ 17 ]. From the XRD it can be seen that the ZnO phase disappears upon heating to 650 °C.…”

Section: Resultsmentioning

confidence: 99%

Solvent Free Synthesis of PdZn/TiO2 Catalysts for the Hydrogenation of CO2 to Methanol

et al. 2018

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Catalytic upgrading of CO 2 to value-added chemicals is an important challenge within the chemical sciences. Of particular interest are catalysts which are both active and selective for the hydrogenation of CO 2 to methanol. PdZn alloy nanoparticles supported on TiO 2 via a solvent-free chemical vapour impregnation method are shown to be effective for this reaction. This synthesis technique is shown to minimise surface contaminants, which are detrimental to catalyst activity. The effect of reductive heat treatments on both structural properties of PdZn/TiO 2 catalysts and rates of catalytic CO 2 hydrogenation are investigated. PdZn nanoparticles formed upon reduction showed high stability towards particle sintering at high reduction temperature with average diameter of 3–6 nm to give 1710 mmol kg −1 h of methanol. Reductive treatment at high temperature results in the formation of ZnTiO 3 as well as PdZn, and gives the highest methanol yield.

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Characterization of ZnO–TiO2 and zinc titanate nanoparticles synthesized by hydrothermal process

Cited by 38 publications

References 25 publications

Zinc Titanate Nanopowders. Synthesis and Characterization

Zinc Titanate Nanopowders. Synthesis and Characterization

Zinc titanates nanopowders: synthesis and characterization

Solvent Free Synthesis of PdZn/TiO2 Catalysts for the Hydrogenation of CO2 to Methanol

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