Studies on a basic question of zinc titanates

Zhong-Chi, Liu; Zhou, Daoguo; Gong, Shuping; Li, Hui

doi:10.1016/j.jallcom.2008.08.021

Cited by 39 publications

(26 citation statements)

References 18 publications

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“…Zinc titanates attract a lot of research attention, [1][2][3][4][5][6] due to their applicability in microwave dielectrics, catalysts, 1 pigments, 2 lubricants 6,7 and other applications. It should be acknowledged that the formation of titanates takes place through the phase transitions of the ZnO-TiO 2 system which are relatively complex and of course sensitive to the starting materials and preparation methods.…”

Section: Introductionmentioning

confidence: 99%

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Surface ionic states and structure of titanate nanotubes

et al. 2015

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Here we present an investigation on Zn-Ti-O ternary (zinc titanate) nanostructures which were prepared by a combination of electrospinning and atomic layer deposition. Depending on the ZnO and TiO 2 molar ratio, two titanates and one mix phased compound were synthesized by varying the post-annealing temperatures. Specifically Zn 2 TiO 4 , ZnTiO 3 and ZnO/TiO 2 nanostructures were fabricated via thermal treatments (900, 700, 800 C, respectively). Structural studies unveiled the titanate phase of the nanostructures. Furthermore, the ionic states of the titanate nanostructures on the surface are revealed to be Ti 3+ and Zn 2+. Spin-orbit splitting of Zn2p and Ti2p doublets were, however, not identical for all titanates which vary from 23.09-23.10 eV and 5.67-5.69 eV respectively. Oxygen vacancies were found on the surface of all titanates. The valance band region was analyzed for Zn3d, Ti3p, O2s and O2p and their hybridization, while the edge (below Fermi level) was determined to be at 2.14 eV, 2.00 eV and 1.99 eV for Zn 2 TiO 4 , ZnTiO 3 and ZnO/TiO 2 respectively.

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Section: Introductionmentioning

confidence: 99%

“…4) or 2 h (ref. 5)) in an appropriate stoichiometry and treated at elevated temperatures. In this context atomic layer deposition (ALD) is a very good choice, where ZnTiO 3 can be obtained through sequential deposition of ZnO and TiO 2 followed by a regular thermal treatment.…”

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confidence: 99%

Surface ionic states and structure of titanate nanotubes

et al. 2015

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“…For instance, the enhancement of the photocatalytic properties of the ZnO-TiO 2 composites, in comparison with TiO 2 oxide, for degrading organic substance has been reported by several authors [1][2][3][8][9][10][11]. In the preparation of the ZnO-TiO 2 system (anatase or/and rutile TiO 2 ), besides the ZnO and TiO 2 binary oxides, the ternary compounds ZnTiO 3 and Zn 2 TiO 4 are, in many cases, originated [12][13][14][15][16]. These titanates have also important photocatalytic properties, whether mixed with ZnO or TiO 2 , or with both: the reason why, at present, they are being widely studied [1,3,9,10,16].…”

Section: Introductionmentioning

confidence: 99%

Band gap coupling in photocatalytic activity in ZnO–TiO2 thin films

2012

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Zinc oxide and titanium dioxide composite thin films were prepared on Corning 7059 glass substrates by co-sputtering. The reactive gas-surroundings used was ultrahigh purity oxygen. To analyze the structural, optical and photocatalytic properties of the ZnO-TiO 2 samples, X-ray diffraction (XRD), atomic force microscopy (AFM), optical absorption, Raman spectroscopy and methylene blue bleaching were carried out at room temperature. XRD patterns indicate the presence of TiO 2 (anatase and rutile phases), ZnO, ZnTiO 3 , and Zn 2 TiO 4 crystalline structures. AFM images allow the observation of non-homogeneous surface in the ZnO-TiO 2 system, suggesting the separation of different crystalline phases in the composite. Raman studies exhibit different spectra in the films depending on the area analyzed, which can be interpreted as a result of the existence of well separated crystalline regions as seen in AFM images. The photocatalytic activity (PA) of TiO 2 -ZnO-ZnTiO 3 -Zn 2 TiO 4 composite, as expected for adequate coupling semiconductors, is larger than PA of ZnO and TiO 2 oxides, used as references. A simple proposal about the probable alignment of the conduction band, the valence band, and the Fermi level is included. E. García-Ramírez · M. Mondragón-Chaparro ESIME Azcapotzalco, Instituto Politécnico Nacional,

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“…The coating experiments were carried out using fabrics made of pure cotton (100%), mass per unit area 250 g/m 2 …”

Section: Methodsmentioning

confidence: 99%

ZnTiO3 Nanoparticles as Novel Multifunctional Finishing of Cotton Fabric

2016

Egypt. J. Chem.

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ULTIFUNCTIONAL textiles, a topic which is important from scientific and economic point of view will be the new direction for development of fabrics and clothing. Finishing of textiles with nanoparticles is a novel rout for creation of unique functions.It is well known that ZnO and TiO 2 possess UV-protection, antibacterial and photocatalytic properties, but there is no enough information concerning the similar behavior of ZnTiO 3 . This provokes the interest to synthesize that compound and to examine its UVprotection and antibacterial properties in addition to its photocatalytic activity. In this study the synthesis and use of hybrid polymers loaded with ZnTiO 3 nanoparticles were presented. Hybrid polymerused here are based on 3-glycidyloxypropyltrimethoxysilane (GPTMS). ZnTiO 3 nanoparticles was used to impart cotton based fabric UV-protection, antibacterial and self-cleaning properties. The viability of the novel finishing as UV-protection will be dictatedby UV-Vis spectroscopy and byassessment of the ultraviolet protection factor (UPF). The antibacterial activity of these sol-gel derived hybrid materials will be researched against Gram-negative bacterium Escherichia coli DSMZ 498 and Gram-positive Micrococcus lutues ATCC 9341. Photocatalytic degradation (decolorization) of methylene blue (MB) in both ZnTiO 3 nanoparticles sol-gel solution /or on the coated fabrics was evaluated. The impact of this finishing technique on other fabric properties, e.g. air permeability, whiteness,and stiffness will be investigated.

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Studies on a basic question of zinc titanates

Cited by 39 publications

References 18 publications

Surface ionic states and structure of titanate nanotubes

Surface ionic states and structure of titanate nanotubes

Band gap coupling in photocatalytic activity in ZnO–TiO2 thin films

ZnTiO3 Nanoparticles as Novel Multifunctional Finishing of Cotton Fabric

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