Synthesis and characterization of (Zn, Mn)TiO3 by modified sol–gel route

Zheng, Mingzhen; Xing, Xianran; Deng, Jinxia; Li, Lü; Zhao, Jie; Li, Qiao; Fang, Chunying

doi:10.1016/j.jallcom.2007.02.039

Cited by 15 publications

(3 citation statements)

References 21 publications

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“…The symmetric and asymmetric stretching of C-O bonds were observed at ∼1080 cm −1 and ∼1040 cm −1 respectively. 33,34 The intensities of O-H stretching (∼3434 cm −1 ), H-O-H bending (∼1631 cm −1 ) and the symmetric (∼1080 cm −1 ) and asymmetric (∼1040 cm −1 ) C-O bands were seen to reduce gradually with increasing calcination temperature and completely disappear ∼700 • C indicating the complete dehydration of the zinc titanate precursors ZnTi(OH) 6 or ZnTiO 3. 3H 2 O to form ZnTiO 3 as confirmed from the XRD patterns.…”

Section: Ft-ir Spectramentioning

confidence: 99%

Structural and optical properties of zinc titanates synthesized by precipitation method

et al. 2015

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Synthesis of zinc titanates was carried out using a simple precipitation method followed by calcination at different temperatures to obtain different phases of the material. The phase transition characteristics, presence of functional groups, structural aspects and optical bandgaps with respect to calcination temperature were studied by thermal analysis, EDAX, FT-IR, powder XRD, Raman and UV-Vis spectroscopy respectively. The compound on heat treatment at 100 • C for 24 h showed broadened peaks in XRD. With increasing temperature of calcination, the compound appeared to turn to crystalline phase and cubic ZnTiO 3 phase was observed at 600 • C. Partial phase transformation of cubic phase ZnTiO 3 into hexagonal ilmenite type ZnTiO 3 was observed in the temperature range 700 • C to 900 • C. At 1000 • C both cubic and hexagonal ilmenite phases decomposed into cubic phase Zn 2 TiO 4 and rutile TiO 2. FT-IR showed M-O bonds in the range of 400 cm −1 to 700 cm −1. Raman spectra of cubic defect spinel ZnTiO 3 and cubic inverse spinel Zn 2 TiO 4 were found to be similar. The optical bandgap calculated using diffuse reflectance spectra was found to be in the range of 3.59 to 3.84 eV depending on calcination temperature.

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Section: Ft-ir Spectramentioning

confidence: 99%

Structural and optical properties of zinc titanates synthesized by precipitation method

et al. 2015

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“…M etal titanate‐based Perovskite‐type oxides, including metals such as nickel, cobalt, barium, strontium, ferrite, lead, zinc, and copper, have received considerable research interest in recent years due to their chemical and electrical properties. These materials are widely used in gas‐sensors, 1,2 humidity sensors, 3–5 magnetic recording media, 6 catalysts, 7–10 and other applications. Metal titanates have recently drawn attention as a promising high dielectric material, which can be used in semiconductor devices like dynamic random access memories, and metal‐oxide semiconductor field‐effect transistors to solve current leaking problems 11–14 .…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of High-k Dielectric Nickel Titanate Thin Films Using a Modified Sol-Gel Method

Chuang¹,

Hsieh²,

Wu³

et al. 2010

Journal of the American Ceramic Society

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This research produced high-quality, single-phase nickel titanate (NiTiO 3 ) thin films, a high-k material for gate dielectrics, by a modified sol-gel method. The precursor was prepared by reactions of nickel acetate tetrahydrate and titanium isopropoxide in 2-methoxyethanol with a 1:1 ratio of Ni/Ti in the solution. After coating, the films were post-heat treated between 5001 and 9001C. X-ray diffraction indicated that the films deposited at and above 6001C were single-phase nickel titanate. X-ray photoelectron spectra of a typical thin film revealed that the binding energies of Ni 2p 3/2 and Ti 2p 3/2 electrons were 855.2 and 457.7 eV, respectively. Raman spectra showed eight absorptions between 200 and 800 cm À1 . Scanning electron microscope images showed smooth surfaces. Findings showed the dielectric constant of the NiTiO 3 film to be 41.36 by capacitance-voltage analysis. The results show that single-phase NiTiO 3 film can be prepared by the sol-gel spin coating method and then heat-treated at 6001C.

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“…However, this way is a complex one for obtaining semiconductors doped in small amounts with Zn and well-defined morphology, since there is a strong dependence on the preparation method and conditions [7,[14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of TiO2 using different hydrolysis catalysts and doped with Zn for efficient degradation of aqueous phase pollutants under UV light

et al. 2010

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In this work, various TiO 2 and TiO 2 doped with 0.1, 1.0, and 5.0 mol% of Zn were prepared by the sol-gel method varying different hydrolysis catalysts (HNO 3 , OHAc, H 3 PO 4 ) in order to be used as photocatalysts for environmental applications. The X-ray diffraction results showed that the different TiO 2 samples have presented the anatase as main phase, However, the acid nature has played an important role in the superficial and optical properties. The N-physisortion analysis has revealed that the specific surface area of calcined TiO 2 samples prepared using H 3 PO 4 , HOAc, and HNO 3 was 245, 100, and 90 m 2 g -1 , respectively, while the spectroscopic UV analysis, the band gap energy has shifted by 3.3-3.0 eV. In order to improve the optical properties of TiO 2 , the last preparation was doped with different zinc concentrations. The result showed that, as the Zn concentration increase by 0.1-5.0 mol%, the surface area increased from 90 to 120 m 2 g -1 . Nevertheless, the E g returned from 3.0 to 3.32. The SEM analyses have not revealed important morphological changes between no doped and doped materials. The catalytic activity of the composite was studied on the photocatalytic degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) and the activity results showed that small Zn concentrations decrease the t 1/2 in 28 min.

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Synthesis and characterization of (Zn, Mn)TiO3 by modified sol–gel route

Cited by 15 publications

References 21 publications

Structural and optical properties of zinc titanates synthesized by precipitation method

Structural and optical properties of zinc titanates synthesized by precipitation method

Fabrication and Characterization of High-k Dielectric Nickel Titanate Thin Films Using a Modified Sol-Gel Method

Synthesis of TiO2 using different hydrolysis catalysts and doped with Zn for efficient degradation of aqueous phase pollutants under UV light

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