Synthesis and Characterization of Ternary Zinc-Antimony-Transition Metal Spinels

Poleti, Dejan; Vasović, Dejan; Karanović, Ljiljana; Branković, Zorica

doi:10.1006/jssc.1994.1261

Cited by 31 publications

(25 citation statements)

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“…Such reduction is in agreement with the JCPDS files, in which the unit cell volume of the Zn 7 Sb 2 O 12 phase is bigger than the volume of the Co 7 Sb 2 O 12 phase. Similar results were reported by Poleti et al [5], for the Co x Zn 7Àx Sb 2 O 12 system, and by Lisboa-Filho et al [6], comparing the Zn 7 Sb 2 O 12 and Ni 7 Sb 2 O 12 phases. Fig.…”

Section: Resultssupporting

confidence: 89%

“…According to the literature, the spinel Zn 7 Sb 2 O 12 displays two crystalline structures: cubic and orthorhombic (b-Zn 7 Sb 2 O 12 ). The orthorhombic structure is normally stable between 960 and 1260 8C, and the cubic one is stable at temperatures below and above the aforesaid range [5]. Fig.…”

Section: Resultsmentioning

confidence: 92%

“…When cobalt is added to the structure, it may occupy both sites, leading to different colors. According to Poleti et al [5], the ions Co 2+ present a higher preference for octahedral sites and Zn 2+ for tetrahedral sites. Therefore, Co 2+ probably occupies octahedral sites, for low x values (Zn 7Àx Co x Sb 2 O 12 ), occupying tetrahedral sites for higher x values.…”

Section: Resultsmentioning

confidence: 97%

“…In the Zn 7 Sb 2 O 12 phase, the Zn 2+ ions occupy tetrahedral and octahedral positions, while Sb 5+ cations occupy only octahedral positions [5]. Consequently, the following coordination polyhedra are present in the structure: SbO 6 , ZnO 6 and ZnO 4 .…”

Section: Introductionmentioning

confidence: 99%

“…Poleti et al [5] observed that the ions Ni 2+ and Co 2+ present a higher preference for octahedral sites and Zn 2+ for tetrahedral sites. The full occupation of the tetrahedral sites by the Zn 2+ ions, for x = 3, should be expected to occur with a higher probability for the Ni x Zn 7Àx Sb 2 O 12 spinels than for the Co x Zn 7Àx Sb 2 O 12 spinels.…”

Section: Introductionmentioning

confidence: 99%

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Color and structural analysis of CoxZn7−xSb2O12 pigments

Gouveia

Soledade

Paskocimas

et al. 2006

Materials Research Bulletin

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The polymeric precursor method was successfully used to synthesize Co x Zn 7Àx Sb 2 O 12 (x = 0-7) powders. Pigments were evaluated using colorimetry, X-ray diffraction, UV-vis and infrared spectroscopy. The optical band gap values vary with the Co 2+ substitution. These results suggest that the concomitant presence of Co and Zn in the spinel lattice leads to the rupture of the Végard law, as well as other properties of the studied system, such as unit cell volume. The Co-richer samples display a higher absorbance than the Co-lean samples. The high absorption of the Co 7 Sb 2 O 12 sample at most of the visible region makes this compound a candidate for a black pigment. It was shown that color depends on the site where the chromophore ion is located, in agreement with the ligand field theory. #

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Color and structural analysis of CoxZn7−xSb2O12 pigments

Gouveia

Soledade

Paskocimas

et al. 2006

Materials Research Bulletin

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Room temperature photoluminescence of the Li₂ZnTi₃O₈ spinel: Experimental and theoretical study

Câmara

Gurgel

Lázaro

et al. 2005

Int J of Quantum Chemistry

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ABSTRACT:This article describes the characterization of intense photoluminescence observed at room temperature of the Li 2 ZnTi 3 O 8 spinel phase, obtained by the polymeric precursor method. The evolution of visible photoluminescence is demonstrated by measurement of the photoluminescence signal as a function of the annealing treatment time. The evolution indicates that PL can be attributed to the presence of an inorganic disordered phase. In addition, increased annealing treatment times cause not only a decrease in the total residual content of organic material in the samples, but also an intensified photoluminescence. We discuss the nature of visible photoluminescence at room temperature of the Li 2 ZnTi 3 O 8 spinel phase in the light of results of both recent experimental and quantum mechanical theoretical studies.

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Effect of the Eu3+ (x = 0, 1, 2 and 3 mol%) doped Zn2−xTiO4 and Zn2Ti1−xO4 obtained by complex polymerization method: photoluminescent and photocatalytic properties

Nascimento

Neto

Garcia

et al. 2019

J Mater Sci: Mater Electron

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In this work, Zn 2 Eu x Ti 1−x O 4 and Zn 2−x Eu x TiO 4 (x = 0, 1, 2 and 3 mol%) powders were synthesized by complex polymerization method (CPM) and calcined at 1000 °C for 4 h. The powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectroscopy in the visible region and photoluminescence properties (PL). The photocatalytic properties were estimated by degradation of methylene blue (MB) dye when irradiated by UV lamps. X-ray diffraction results demonstrated the existence of Zn 2 TiO 4 as primary phase and ZnO with secondary phase. According to diffractograms, the crystallite size varied between 49 and 67 nm. The Eu 3+ ions introduction provides increased absorption in visible region, but the band-gap remains practically constant. In samples were observed an increased in photocatalysis with the increase in europium concentration, while in the Zn 2 Eu x Ti 1−x O 4 samples, photocatalysis was reduced to europium concentrations greater than 1%. Eu 3+ doped Zn 2 TiO 4 provided a photoluminescent intensity increasing. CIE chromaticity coordinates confirm emission in the red region of the phosphor.

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Synthesis and Characterization of Ternary Zinc-Antimony-Transition Metal Spinels

Cited by 31 publications

References 0 publications

Color and structural analysis of CoxZn7−xSb2O12 pigments

Color and structural analysis of CoxZn7−xSb2O12 pigments

Room temperature photoluminescence of the Li₂ZnTi₃O₈ spinel: Experimental and theoretical study

Effect of the Eu3+ (x = 0, 1, 2 and 3 mol%) doped Zn2−xTiO4 and Zn2Ti1−xO4 obtained by complex polymerization method: photoluminescent and photocatalytic properties

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Synthesis and Characterization of Ternary Zinc-Antimony-Transition Metal Spinels

Cited by 31 publications

References 0 publications

Color and structural analysis of CoxZn7−xSb2O12 pigments

Color and structural analysis of CoxZn7−xSb2O12 pigments

Room temperature photoluminescence of the Li2ZnTi3O8 spinel: Experimental and theoretical study

Effect of the Eu3+ (x = 0, 1, 2 and 3 mol%) doped Zn2−xTiO4 and Zn2Ti1−xO4 obtained by complex polymerization method: photoluminescent and photocatalytic properties

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Room temperature photoluminescence of the Li₂ZnTi₃O₈ spinel: Experimental and theoretical study