Photoluminescence in disordered Zn2TiO4

Chaves, Alexsandra Cristina; Lima, Severino Jackson Guedes de; Araújo, Regiane C. M. U.; Maurera, M. A. M. A.; Longo, Elson; Pizani, P. S.; Simões, Luiz G.P.; Soledade, L. E. B.; Souza, A. G.; Santos, I. M. G.

doi:10.1016/j.jssc.2005.12.018

Cited by 70 publications

(37 citation statements)

References 35 publications

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“…The absorption range of condensed [TiO6] octahedral groups occurs at 650-550 cm -1 , and the absorption range of isolated (ZnO4) tetrahedral groups occurs at 500-400 cm -1 [42].As can be seen in Fig. 2 and Table 2, several absorption lines are located in these spectral regions, which supports the results from the XRD measurements.…”

Section: Discussionsupporting

confidence: 84%

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Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Ivanova

Harizanova

Koutzarova

et al. 2011

Journal of Non-Crystalline Solids

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The sol-gel route has been applied to obtain ZnO-TiO 2 thin films. For comparison, pure TiO 2 and ZnO films are also prepared from the corresponding solutions. The films are deposited by a spin-coated method on silicon and glass substrates. Their structural and vibrational properties have been studied as a function of the annealing temperatures (400-750 °C). Pure ZnO films crystallize in a wurtzite modification at a relatively low temperature of 400 °C, whereas the mixed oxide films show predominantly amorphous structure at this temperature. XRD analysis shows that by increasing the annealing temperatures, the sol-gel Zn/Ti oxide films reveal a certain degree of crystallization and their structures are found to be mixtures of wurtzite ZnO, Zn 2 TiO 4 , anatase TiO 2 and amorphous fraction. The XRD analysis presumes that Zn 2 TiO 4 becomes a favored phase at the highest annealing temperature of 750 °C. The obtained thin films are uniform with no visual defects. The optical properties of ZnO-TiO 2 films have been compared with those of single component films (ZnO and TiO 2 ). The mixed oxide films present a high transparency with a slight decrease by increasing the annealing temperature.

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Section: Discussionsupporting

confidence: 84%

“…IR bands related to (TiO6), [ZnO4] and (ZnO6) are expected if Zn 2 TiO 4 is present [42]. The absorption range of condensed [TiO6] octahedral groups occurs at 650-550 cm -1 , and the absorption range of isolated (ZnO4) tetrahedral groups occurs at 500-400 cm -1 [42].As can be seen in Fig.…”

Section: Discussionmentioning

confidence: 75%

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Ivanova

Harizanova

Koutzarova

et al. 2011

Journal of Non-Crystalline Solids

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“…The absorption peak (1089 cm À1 ) only present in sample IM_ZnAl_3Ti is related to C-OH groups and can be attributed to the axial stretching of C-O, coupled to the stretching of an adjacent C-C bond [53]. According to literature, all absorptionvibration bands that are detected in the range of 800-400 cm À1 usually are assigned to vibration bands of [54]. In samples IM_ZnAl_3Ti and IM_ZnAl_2Ti bands in the range of 500-400 cm À1 were detected and can be assigned to the tetrahedral ZnO 4 group.…”

Section: Structural Properties Of the Prepared Samplesmentioning

confidence: 96%

Solar light induced rhodamine B degradation assisted by TiO2–Zn–Al LDH based photocatalysts

Hadnadjev-Kostic

Vulic

Marinković‐Nedučin

2014

Advanced Powder Technology

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“…[26,27] As a dielectric material, its physical, electrical, and optical properties have been studied for various applications. [21,28,29] In this Communication, we shall demonstrate a three-stage synthesis of twinned Zn 2 TiO 4 nanowires using ZnO nanowires as template, which could be further developed for controlled synthesis of ternary oxide nanostructures. Figure 1a-c shows the scanning electron microscopy (SEM) images of ZnO nanowires and ZnO/Ti core/shell nanowires before and after annealing, respectively.…”

mentioning

confidence: 99%

Twinned Zn₂TiO₄ Spinel Nanowires Using ZnO Nanowires as a Template

et al. 2007

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One-dimensional (1D) semiconductor metal oxide nanostructures, such as nanowires, nanobelts, and nanotubes, have attracted considerable attention due to their prominent electrical, optical, and chemical properties and potential applications in nanoscale electronic and optoelectronic devices. [1][2][3][4][5] However, the properties and applications of those nanomaterials are limited by their simple binary systems.[6] Therefore, synthesis of complex functional nanomaterials with controlled size and morphology, such as core/shell quantum dots, [7] nanowires and nanobelts, [8][9][10][11] heterostructures, [6,12] superlattices, [13] and nanotubes, [14][15][16] are highly desirable. Furthermore, 1Dternary nanocomposites, such as Zn 2 SnO 4 , [8][9][10]17] Zn 2 TiO 4 , [18] ZnGa 2 O 4 , [11,16] MgAl 2 O 4 , [14] CoFe 2 O 4 , [19] exhibit specific functions that are unattainable by common binary composites. Conventional synthesis methods of those ternary composites usually involve high-energy ball milling of two binary solid oxides [18] or a high-temperature solid reaction, [20,21] which are not suitable for 1D nanostructure growth. Only recently, syntheses of single-crystal ternary oxide nanowires and nanotubes have been achieved by using Ga 2 O 3 , MgO, or ZnO nanowires as template. [11,14,15] For face-centered cubic (fcc) nanostructures, twinning is probably the most common structural defect, especially in metal and metal alloy nanoparticles, [22,23] where two subcrystallites share a facet to form a mirror image of each other. Twinning is occasionally observed in binary systems, such as cubic ZnS and InP nanowires, [24,25] both of which have a preferential <111> growth direction. However, reports on the synthesis of twinned structures of fcc ternary nanowires are rare; [10] that is, the formation of twinned nanowires has yet to be revealed.Zinc titanate (Zn 2 TiO 4 ) is an inverse spinel, which has been used as a catalyst and pigment in industry. It is one of the leading regenerable catalysts and has been demonstrated to be a good sorbent for removing sulfur-related compounds at high temperature. [26,27] As a dielectric material, its physical, electrical, and optical properties have been studied for various applications. [21,28,29] In this Communication, we shall demonstrate a three-stage synthesis of twinned Zn 2 TiO 4 nanowires using ZnO nanowires as template, which could be further developed for controlled synthesis of ternary oxide nanostructures. Figure 1a-c shows the scanning electron microscopy (SEM) images of ZnO nanowires and ZnO/Ti core/shell nanowires before and after annealing, respectively. The as-grown ZnO nanowires shown in Figure 1a are randomly aligned, of about 40-60 nm in diameter, and 10 lm in length. It can be seen clearly that the morphology of the ZnO nanowires is reserved after coating with Ti (Fig. 1b). The surface is smooth and the diameter of the Ti-coated nanowires is increased to 70-100 nm. No aggregated Ti particles could be seen in Figure 1b, indicating a uniform deposition of Ti on ZnO ...

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Photoluminescence in disordered Zn2TiO4

Cited by 70 publications

References 35 publications

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Solar light induced rhodamine B degradation assisted by TiO2–Zn–Al LDH based photocatalysts

Twinned Zn₂TiO₄ Spinel Nanowires Using ZnO Nanowires as a Template

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Photoluminescence in disordered Zn2TiO4

Cited by 70 publications

References 35 publications

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

Solar light induced rhodamine B degradation assisted by TiO2–Zn–Al LDH based photocatalysts

Twinned Zn2TiO4 Spinel Nanowires Using ZnO Nanowires as a Template

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Twinned Zn₂TiO₄ Spinel Nanowires Using ZnO Nanowires as a Template