Preparation of anatase and rutile thin films by controlling oxygen partial pressure

Syarif, Dani Gustaman; Miyashita, Atsumi; Yamaki, Tetsuya; Sumita, T.; Choi, Yeongsoo; Itoh, Hisayoshi

doi:10.1016/s0169-4332(02)00532-9

Cited by 92 publications

(30 citation statements)

References 25 publications

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“…Ease of rearrangement and transformation are enhanced by relaxation (lessening of structural rigidity) of the large oxygen sublattice through the increased presence of oxygen vacancies [109,164,165]. This effect has been shown through firing in different atmospheres, where neutral or reducing conditions of low oxygen partial pressure generally greatly enhance the anatase to rutile transformation [3,67,166], although contrary effects have been reported as vacuum conditions have been observed to slow the phase transformation [109]. This could be a result of reduced heat transfer because vacuum conditions give lower convective heat transfer than air.…”

Section: Kinetics Of the Anatase To Rutile Phase Transformationmentioning

confidence: 99%

Review of the anatase to rutile phase transformation

2010

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Titanium dioxide, TiO 2 , is an important photocatalytic material that exists as two main polymorphs, anatase and rutile. The presence of either or both of these phases impacts on the photocatalytic performance of the material. The present work reviews the anatase to rutile phase transformation. The synthesis and properties of anatase and rutile are examined, followed by a discussion of the thermodynamics of the phase transformation and the factors affecting its observation. A comprehensive analysis of the reported effects of dopants on the anatase to rutile phase transformation and the mechanisms by which these effects are brought about is presented in this review, yielding a plot of the cationic radius versus the valence characterised by a distinct boundary between inhibitors and promoters of the phase transformation. Further, the likely effects of dopant elements, including those for which experimental data are unavailable, on the phase transformation are deduced and presented on the basis of this analysis.

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Section: Kinetics Of the Anatase To Rutile Phase Transformationmentioning

confidence: 99%

Review of the anatase to rutile phase transformation

2010

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“…Hence, in recent years, PLAL has become a successful nanomaterial fabrication tool for the formation of the novel nanostructures. 19,[21][22][23][24][25] However, compared to large investigations on fabrication of TiO 2 by laser ablation in vacuum, 7,[26][27][28][29][30][31] there were few studies on the preparation of TiO 2 nanoparticles by PLAL.…”

Section: 5mentioning

confidence: 99%

Simple Preparation of Anatase TiO₂Nanoparticles via Pulsed Laser Ablation in Liquid

Hong¹,

Lee²,

Jung³

et al. 2013

Bulletin of the Korean Chemical Society

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The physical and chemical properties of TiO 2 have been of great interest due to the potential application in photocatalytic, photovoltaic, lithium-ion battery and dye-sensitized solar cell systems.1-3 Especially, its characteristic properties in optical and electronic properties, nontoxicity, chemical inertness, and high melting temperatures have drawn extensive research on the ability of semiconductor photocatalyst to promote the photodegradation of various pollutants. 4,5Anatase, brookite, and rutile are the major crystalline structures of TiO 2 , of which rutile phase is most stable; whereas anatase and brookite phases are metastable and easily transformed to rutile phase when heated above about 600-8006,7 As demonstrated in other experimental studies, the anatase form of TiO 2 has shown much higher photoactivity than that of rutile. 3,5,8,9 In the meantime, a number of methods have been explored and developed for the synthesis of TiO 2 nanoparticles, such as hydrolysis of Ti(IV) ions, 10 hydrolysis of titanium alkoxides 11 or titanium tetrachloride 12 in gas phase, sol-gel, 13hydrothermal hydrolysis, 14 and precipitation, 15 of which many studies were devoted to the synthesis of rutile phase, while fewer investigations on the anatase phase. This naively supports that synthesis of pure anatase phase is more challenging than that of rutile. Furthermore, the major products from the above techniques are typically amorphous and require post-calcination for better crystallinity and morphology of the product, which inevitably results in the formation of larger sizes of TiO 2 nanoparticles. Therefore, it is demanding to explore a method that overcomes the problems mentioned above.In order to fabricate small-sized TiO 2 nanoparticles with good crystallinity at room temperature, we have applied a pulsed laser to ablate a Ti plate immersed in deionized water and methanol. Pulsed laser ablation in liquid (PLAL) 16 was introduced by Patil and co-workers in 1987 and has been demonstrated to be an effective, simple, and versatile method for synthesizing nanomaterials starting from an appropriate choice of solids and liquids.17-20 Because of relatively simple and clean preparation of nanoparticles using PLAL, coupled with its versatility, many different metal nanostructures providing desired functions have been fabricated. One of the main advantages of PLAL compared to other methods is that it can generate nanomaterials without the need of any catalysts or organic additives. Hence, in recent years, PLAL has become a successful nanomaterial fabrication tool for the formation of the novel nanostructures.19,21-25 However, compared to large investigations on fabrication of TiO 2 by laser ablation in vacuum, 7,26-31 there were few studies on the preparation of TiO 2 nanoparticles by PLAL.32-34 Furthermore in the previous PLAL studies, the synthesis of rutile and mixture of anatase and rutile phase was mostly employed. 34,35In the present note, we report a one-step synthesis of pure anatase TiO 2 nanoparticles by PLA of Ti pla...

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“…PLD has been widely employed to produce titanium oxide films with different morphology, crystallinity and phase [11][12][13][14][15][16][17][18]. Nitrogen doping has been also investigated exploiting suitable gas mixtures in order to shift optical absorption to the visible range [19].…”

Section: Introductionmentioning

confidence: 99%

Titanium oxide nanostructured films by reactive pulsed laser deposition

Fusi

Russo

Casari

et al. 2009

Applied Surface Science

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Preparation of anatase and rutile thin films by controlling oxygen partial pressure

Cited by 92 publications

References 25 publications

Review of the anatase to rutile phase transformation

Review of the anatase to rutile phase transformation

Simple Preparation of Anatase TiO₂Nanoparticles via Pulsed Laser Ablation in Liquid

Titanium oxide nanostructured films by reactive pulsed laser deposition

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Preparation of anatase and rutile thin films by controlling oxygen partial pressure

Cited by 92 publications

References 25 publications

Review of the anatase to rutile phase transformation

Review of the anatase to rutile phase transformation

Simple Preparation of Anatase TiO2Nanoparticles via Pulsed Laser Ablation in Liquid

Titanium oxide nanostructured films by reactive pulsed laser deposition

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Product

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Simple Preparation of Anatase TiO₂Nanoparticles via Pulsed Laser Ablation in Liquid