Microemulsion-Mediated Hydrothermal Synthesis and Characterization of Nanosize Rutile and Anatase Particles

Wu, Mingmei; Long, Junbiao; Huang, Aihong; Luo, Yi; Feng, Shouhua; Xu, Ruren

doi:10.1021/la990514f

Cited by 177 publications

(118 citation statements)

References 28 publications

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“…The patterns 3-5 show the crystallization calcined at 300, 500 and 800 °C, respectively, in which with previous reports [23,24]. According to the equation fr = 1.26Ir/(Ia + 1.26Ir) [25], the mass fraction of rutile (fr) in this sample was calculated by measuring the intensity of the strongest (110) and (101) diffraction peaks of rutile (Ir) and anatase (Ia), respectively to be ca. 52%.…”

Section: Characteristics Of Tnt Filmssupporting

confidence: 85%

Effects of structure of anodic TiO2 nanotube arrays on photocatalytic activity for the degradation of 2,3-dichlorophenol in aqueous solution

Liang

2009

Journal of Hazardous Materials

177

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In this study titanium dioxide nanotube (TNT) arrays were prepared by an anodic oxidation process with post-calcination. The morphology and structure of the TNT films were studied by FESEM, XRD, and XPS. Photocatalytic activity of the TNT films was evaluated in terms of the degradation of 2,3-dichlorophenol in aqueous solution under UV light irradiation. The effects of the nanotube structure including tube length and tube wall thickness, and crystallinity on the photocatalytic activity were investigated in details. The results showed that the large specific surface area, high pore volume, thin tube wall, and optimal tube length would be important factors to achieve the good performance of TNT films. Moreover, the TNT films calcined at 500 o C for 1 h with the higher degree of crystallinity exhibited the higher photocatalytic activity than other TNT films calcined at 300 o C and 800 o C. Consequently, these results indicate that the optimization of TiO 2 nanotube structures is critical to achieve the high performance of photocatalytic reaction.

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Section: Characteristics Of Tnt Filmssupporting

confidence: 85%

Effects of structure of anodic TiO2 nanotube arrays on photocatalytic activity for the degradation of 2,3-dichlorophenol in aqueous solution

Liang

2009

Journal of Hazardous Materials

177

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“…This result shows that the increase in HCl volume enhances the growth of the films along (110) direction. This result agrees well with the previous result reported by Wu et al [14]. TiO 2 nanorods did not grow on the ITO substrate surface when the volume of the HCl either increased from 23 to 30 ml or decreased from 15 to 10 ml.…”

Section: Structural Propertiessupporting

confidence: 93%

Preparation and Optimization of Nanostructured TiO<sub>2</sub> Thin Films for Dye-Sensitized Solar Cell Applications

Venkatachalam¹,

Hayahsi²,

Ebina³

et al. 2013

Trans. Mat. Res. Soc. Japan

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TiO 2 nanowires and nanorods were prepared on ITO coated glass substrates by hydrothermal method. TiO 2 films were prepared under different preparation conditions. In this paper, effect of growth conditions on the surface morphological and structural properties of anatase and rutile TiO 2 films was studied. XRD results showed that the pure rutile TiO 2 phase was grown in HCl medium. In contrast, pure anatase TiO 2 phase was grown in HNO 3 medium. The crystallinity of TiO 2 films increased as the reaction temperature was increased from 120 to 160°C. The phase transformation from rutile to anatase was observed when the volume concentration of titanium nbutoxide (TNB) increased from 0.5 to 1.0 ml. Scanning electron microscopy images showed that the morphology of the final product was strongly dependent on the experimental parameters, such as volume of HCl and annealing temperatures. The nanostructured TiO 2 films fabricated by hydrothermal method can be used for dyesensitized solar cell applications.

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“…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, 13 hydrothermal 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.…”

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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Microemulsion-Mediated Hydrothermal Synthesis and Characterization of Nanosize Rutile and Anatase Particles

Cited by 177 publications

References 28 publications

Effects of structure of anodic TiO2 nanotube arrays on photocatalytic activity for the degradation of 2,3-dichlorophenol in aqueous solution

Effects of structure of anodic TiO2 nanotube arrays on photocatalytic activity for the degradation of 2,3-dichlorophenol in aqueous solution

Preparation and Optimization of Nanostructured TiO<sub>2</sub> Thin Films for Dye-Sensitized Solar Cell Applications

Simple Preparation of Anatase TiO₂Nanoparticles via Pulsed Laser Ablation in Liquid

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Microemulsion-Mediated Hydrothermal Synthesis and Characterization of Nanosize Rutile and Anatase Particles

Cited by 177 publications

References 28 publications

Effects of structure of anodic TiO2 nanotube arrays on photocatalytic activity for the degradation of 2,3-dichlorophenol in aqueous solution

Effects of structure of anodic TiO2 nanotube arrays on photocatalytic activity for the degradation of 2,3-dichlorophenol in aqueous solution

Preparation and Optimization of Nanostructured TiO<sub>2</sub> Thin Films for Dye-Sensitized Solar Cell Applications

Simple Preparation of Anatase TiO2Nanoparticles via Pulsed Laser Ablation in Liquid

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Product

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Simple Preparation of Anatase TiO₂Nanoparticles via Pulsed Laser Ablation in Liquid