Formation and transformation of ZnTiO3 prepared by sol–gel process

Hou, Lei; Hou, Yudong; Zhu, Mankang; Tang, Jian; Liu, Jingbing; Wang, Hao; Yan, Hui

doi:10.1016/j.matlet.2004.07.046

Cited by 84 publications

(51 citation statements)

References 17 publications

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“…References in Fig. 3 of the same modes observed by other authors are pointed out above each Raman-peak [12,15,20,[23][24][25][26][27][28][29].…”

Section: Resultssupporting

confidence: 74%

“…Figure 3(b) shows the spectrum of regions centered on hill-like regions. More intense signals in the first spectrum are those of TiO 2 anatase oxide and secondary peaks are associated with ZnO and Zn 2 TiO 4 phases [13,15,[20][21][22]. The other Raman spectrum shows the vibrational modes of all crystallized phases, i.e., modes of ZnO, TiO 2 , Zn 2 TiO 4 and ZnTiO 3 .…”

Section: Resultsmentioning

confidence: 99%

“…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%

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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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“…References in Fig. 3 of the same modes observed by other authors are pointed out above each Raman-peak [12,15,20,[23][24][25][26][27][28][29].…”

Section: Resultssupporting

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2012

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“…In contrast, attempts to synthesize pure ZnTiO 3 from a mixture of ZnO and TiO 2 in a mole ratio of Zn/Ti = 1:1 by solid-state reaction method were unsuccessful. Consequently, new routes including sol-gel process [9][10][11] and molten salt synthesis method [12] were sought for the preparation of pure ZnTiO 3 . It is no doubt that pure ZnTiO 3 powders can be obtained by some of the aforementioned routes.…”

Section: Introductionmentioning

confidence: 99%

Studies on a basic question of zinc titanates

Zhong-Chi

Zhou

Gong

et al. 2009

Journal of Alloys and Compounds

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“…Sol-gel is a typical chemical method to prepare ferroelectric powders. However, it was regarded as a solid rather than solution process because sol-gel-derived precipitates are amorphous in nature and calcinations in air are inevitable for the formation of the crystalline material [23][24][25][26][27][28]. The calcinations lead to serious particle agglomeration, grain growth and small surface area, which all decrease the activity of powder.…”

Section: Introductionmentioning

confidence: 99%

Lead-free Bi-based complex perovskite nanowires: Sol–gel-hydrothermal processing and the densification behavior

et al. 2010

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One dimensional ferroelectric nanostructure is noteworthy for their size-dependent dielectric, piezoelectric, and electro-optic properties with corresponding applications in smart devices such as transducers, actuators, and high-k dielectrics at the nanoscale. Due to their extremely small size and anisotropy, the control of nucleation and growth of one dimensional nanostructure materials is still a big challenge. Sol-gel-hydrothermal chemistry combines both the merits of sol-gel and hydrothermal technique, which offers a very useful tool for low-temperature synthesis of the ferroelectric nanowires. In this paper, we will review recent works devoted to the synthesis of Bi-based complex perovskite nanowires, i.e. Na 0.5 Bi 0.5 TiO 3 , K 0.5 Bi 0.5 TiO 3 , (K 0.5 Bi 0.5 ) 0.4 Ba 0.6 TiO 3 and (Na 0.8 K 0.2 ) 0.5 Bi 0.5 TiO 3 systems. We will focus on the formation mechanism and morphology evolution of nanowires prepared in sol-gelhydrothermal process. Moreover, due to the good sinterability of the nanowires, the high-densified single-phase ceramic can be fabricated even by a conventional sintering process.

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Formation and transformation of ZnTiO3 prepared by sol–gel process

Cited by 84 publications

References 17 publications

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

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

Studies on a basic question of zinc titanates

Lead-free Bi-based complex perovskite nanowires: Sol–gel-hydrothermal processing and the densification behavior

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