Solid state synthesis and structural characterization of zinc titanates

Ayed, Sarra; Abdelkefi, Helmi; Khemakhem, H.; Matoussi, Adel

doi:10.1016/j.jallcom.2016.03.244

Cited by 31 publications

(9 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ZnO-TiO2 binary system. The absorption bands in the frequency intervals of 2318 to 2353 cm −1 was associated with the free CO2 molecule existing in the atmospheric air [20]. Also, the absorption bands (spectra of ZT-300, ZT-500, and ZT-600) in the range of 1409-1411 cm −1 and those in the range of 1501-1504 cm −1 have been associated with carbonate species which could be derived from the zinc titanate precursors.…”

Section: Infrared Spectroscopymentioning

confidence: 91%

“…This absorption band disappears in the spectra of the composites heat-treated at high temperatures, namely ZT-700 and ZT-800, which is an indicator for the complete dehydration of the ZnO-TiO 2 binary system. The absorption bands in the frequency intervals of 2318 to 2353 cm −1 was associated with the free CO 2 molecule existing in the atmospheric air [20].…”

Section: Infrared Spectroscopymentioning

confidence: 95%

“…and heat treated (calcination) at different temperatures in order to obtain a composite with high physico-chemical stability and adequate reactive and regenerative capacity [16][17][18][19]. Generally, the ZnO-TiO 2 binary system may consist of five types of zinc titanates, including ZnTiO 3 (ZnO-TiO 2 ), Zn 2 TiO 4 (2ZnO-TiO 2 ), and Zn 2 Ti 3 O 8 (2ZnO-3TiO 2 ), but for high temperature desulfurization of syngas only Zn 2 TiO 4 is the most important [20]. However, the end product composition is strongly dependent on the synthesis method and the heat treatment applied [21].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimization of the Technological Parameters for Obtaining Zn-Ti Based Composites to Increase the Performance of H2S Removal from Syngas

et al. 2020

View full text Add to dashboard Cite

The realization of some composite materials that allow the best removal of H2S from syngas was the main objective of this work. Thus, the optimization of the technological parameters for obtaining composites based on Zn-Ti was achieved. The paper studies the influence of calcination temperature on the characteristics of the binary ZnO-TiO2 system used to synthesize a composite material with suitable properties to be used subsequently for syngas treatment. The mineralogical and structural analyzes showed that starting with the calcination temperature of 700 °C the material synthetized is composed mainly of zinc orthotitanate which possess the corresponding characteristics to be finally used in the treatment of the syngas for its desulfurization. At this calcination temperature the material has a compact structure most likely due to sintering of the formed titanates. These composites have a texture that places them rather in the category of non-porous materials, the pore volume and their surface area obviously decreasing as the calcination temperature increases. A maximum sulfur removal degree of about 97% was obtained by using a composite synthetized at a temperature of 700 °C (ZT-700).

show abstract

Section: Infrared Spectroscopymentioning

confidence: 91%

Section: Infrared Spectroscopymentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimization of the Technological Parameters for Obtaining Zn-Ti Based Composites to Increase the Performance of H2S Removal from Syngas

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Debey-Scherrer equation [30] represented with (equation (1)) and the (311) diffraction peak were applied to estimate and investigate the influence of annealing temperature and dopant concentration on the average diameter of zinc titanate nanocrystals formed in the thin films specimens and the calculated results were listed in table 1. Where d is the interplanar spacing and h, k, and l are miller indices.…”

Section: X-ray Diffraction Patterns (Xrd)mentioning

confidence: 99%

Blue and green emission from Ho³⁺ doped zinc titanate phosphor thin films by sol-gel

Elhadi

Liu

2019

Mater. Res. Express

View full text Add to dashboard Cite

Zinc titanate ZnTiO 3 phosphor thin films doped with 1, 2, and 3 mol% of Ho 3+ ions were fabricated using sol-gel method a combined with dip-coating technique on silica glass substrate and subsequent thermal annealing in the range of 600-900°C. Effects of annealing temperature and Ho 3+ ions concentration on the structure and optical properties of these phosphor thin films were investigated using x-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible transmittance spectroscopy, excitation, and emission spectroscopy. Results revealed that ZnTiO 3 nanocrystals were formed upon 600°C annealing temperature. At 900°C polycrystalline films including ZnO and TiO 2 anatase phase were observed. The average diameter of nanocrystals showed temperature dependence and was varied in the range-over 15-48 nm which was revealed by SEM images with cracks free. The EDS showed homogenous distribution of Ho 3+ ions in the thin film specimens. It was found that Ho 3+ ions incorporated into the nanocrystals. As a result, the room temperature luminescence color emission of the synthesized phosphor thin film specimens can be tuned from blue to green by switching the excitation wavelength from 360 nm to 430 nm. The achieved result makes these phosphor thin films promising for several applications such as optoelectronics and light-emitting.

show abstract

“…Several physical properties of zinc orthotitanate (Zn 2 TiO 4 ) have been exhaustively investigated, including dielectric features, especially in the microwave range [1,2], semiconductor characteristics [3] and photocatalytic properties [4], among others. The versatility of the compound allows its use as a catalytic sorbent for the removal of contaminants from hot coal gases and in the chemical industry [1], in white color pigmentation [5], as a sensor component [6] or an inorganic antimicrobial agent [7], and even in forensic applications [8]. The synthesis might be performed through a conventional solid-state reaction between ZnO and TiO 2 in a 2:1 ratio, but other methods are also used [9].…”

Section: Introductionmentioning

confidence: 99%

Zn2TiO4 photoluminescence enhanced by the addition of Cr3+

2019

View full text Add to dashboard Cite

In this work, the photoluminescent properties of Zn 2 TiO 4 :Cr 3+ are presented. Samples were prepared from ZnO, TiO 2 and Cr 2 O 3 by solid-state reaction. The compound formation was confirmed by X-ray diffraction. Emissions were obtained using photoluminescence spectroscopy at room temperature. The system crystallizes in the space group Fd3m with an inverse spinel structure. The emission spectrum presents a broad and intense band in the near-infrared region. Photoluminescence excitation shows two bands in the visible frequency range assigned to octahedral Cr 3+ transitions. Cr 3+-doped and undoped sample emissions were compared. Optical spectra were analyzed and interpreted according to the crystal field theory and the Tanabe-Sugano energy matrices for the d 3 configuration by calculating the Dq and B parameters. This work is a follow-up of the previous research on transition metal cations used as dopants in a Zn 2 TiO 4 lattice, and the current results suggest that the system might be a promising luminescence source at room temperature.

show abstract

Solid state synthesis and structural characterization of zinc titanates

Cited by 31 publications

References 28 publications

Optimization of the Technological Parameters for Obtaining Zn-Ti Based Composites to Increase the Performance of H2S Removal from Syngas

Optimization of the Technological Parameters for Obtaining Zn-Ti Based Composites to Increase the Performance of H2S Removal from Syngas

Blue and green emission from Ho³⁺ doped zinc titanate phosphor thin films by sol-gel

Zn2TiO4 photoluminescence enhanced by the addition of Cr3+

Contact Info

Product

Resources

About

Solid state synthesis and structural characterization of zinc titanates

Cited by 31 publications

References 28 publications

Optimization of the Technological Parameters for Obtaining Zn-Ti Based Composites to Increase the Performance of H2S Removal from Syngas

Optimization of the Technological Parameters for Obtaining Zn-Ti Based Composites to Increase the Performance of H2S Removal from Syngas

Blue and green emission from Ho3+ doped zinc titanate phosphor thin films by sol-gel

Zn2TiO4 photoluminescence enhanced by the addition of Cr3+

Contact Info

Product

Resources

About

Blue and green emission from Ho³⁺ doped zinc titanate phosphor thin films by sol-gel