Exploring the Phase Transformation Mechanism of Titanium Dioxide by High Temperature in Situ Method

Wu, Shengcai; Long, Youwen; Xu, Benjun

doi:10.1088/1757-899x/493/1/012010

Cited by 16 publications

(9 citation statements)

References 3 publications

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“…At 200 °C, the reactions are more pronounced and only stop for an overlayer thickness of approximately 5 Å. These TiO x thicknesses for which the exchange reactions stop are on the same order as the lattice parameters of anatase and rutile TiO 2 (3.78 and 2.95 Å, respectively), although it should be noted that the TiO x layers in our case are amorphous . This would suggest that the exchange reaction is mostly confined to the top layer and stops when approximately a monolayer of TiO x is formed.…”

Section: Resultsmentioning

confidence: 56%

“…These TiO x thicknesses for which the exchange reactions stop are on the same order as the lattice parameters of anatase and rutile TiO 2 (3.78 and 2.95 Å, respectively), although it should be noted that the TiO x layers in our case are amorphous. 34 This would suggest that the exchange reaction is mostly confined to the top layer and stops when approximately a monolayer of TiO x is formed. Such a self-limiting behavior of the exchange reaction was also found by Lancaster et al for the case of the conversion from ZnO to ZnS.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Growth Mechanism and Film Properties of Atomic-Layer-Deposited Titanium Oxysulfide

et al. 2022

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Section: Resultsmentioning

confidence: 56%

Section: ■ Results and Discussionmentioning

confidence: 99%

Growth Mechanism and Film Properties of Atomic-Layer-Deposited Titanium Oxysulfide

et al. 2022

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“…During the formation and transformation of rutile coated on the surface of TiO 2 (B) nanobelts, some grains selectively grow along its C axis, which makes the crystal grow faster along the (110) plane. 60 The strongest (110) crystal plane diffraction peak of the rutile phase in the XRD spectrum can confirm this. In addition, the atoms at the angular position are more exposed than the atoms at other positions, hence the transformation is faster during the reaction.…”

Section: Resultsmentioning

confidence: 76%

“…When the reaction time is 36 h, all rectangular nanobelts almost transform into spindle-shaped nanobelts, and the rough surface becomes smooth due to self-assembly and grain growth (shown in Figure f). During the formation and transformation of rutile coated on the surface of TiO 2 (B) nanobelts, some grains selectively grow along its C axis, which makes the crystal grow faster along the (110) plane . The strongest (110) crystal plane diffraction peak of the rutile phase in the XRD spectrum can confirm this.…”

Section: Resultsmentioning

confidence: 82%

Rutile-Coated B-Phase TiO₂ Heterojunction Nanobelts for Photocatalytic H₂ Evolution

Zhu

Kong

et al. 2020

ACS Appl. Nano Mater.

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In the field of photocatalysis, the crystal phase engineering of titanium dioxide is a research hotspot. Titanium dioxide heterojunctions often exhibit better photocatalytic performance than single-phase TiO2. Here, a two-step hydrothermal and calcination method is used to build the phase interface between TiO2 (B) and rutile for the first time, and a narrow band gap heterojunction TiO2 material is synthesized. The heterojunction TiO2 material is characterized by transmission electron microscopy (TEM), ultraviolet (UV), X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR). The two phases are connected by a corner-sharing at the phase interface. The different positions of the conduction bands and valence bands between the two phases result in the effective separation of photogenerated electrons and holes through the phase interface. Under light, the photogenerated holes are transferred to the rutile phase and quickly consumed by the sacrificial agent, and the surplus photogenerated electrons participate in the H2 evolution reaction. When the ratio of TiO2 (B) to rutile is about 2/1, the TiO2 (B)/rutile heterojunction exhibits the highest photocurrent and the best H2 evolution performance under the present experimental conditions.

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“…Incipient peaks assigned to rutile appear at 500 °C and continue to increase in intensity from 600 to 800 °C where the massive conversion to the rutile phase is attained, Figures S20 and S21. In general terms, the TiO 2 amorphous phase usually crystallizes in the anatase phase at T ≥ 300 °C and then transforms to rutile at about 610 °C …”

Section: Resultsmentioning

confidence: 99%

NIR-Reflective and Hydrophobic Bio-Inspired Nano-Holed Configurations on Titanium Alloy

Belén

Gravina

Pistonesi

et al. 2022

ACS Appl. Mater. Interfaces

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Near-infrared (NIR) radiation plays an important role in guided external stimulus therapies; its application in bone-related treatments is becoming more and more frequent. Therefore, metallic biomaterials that exhibit properties activated by NIR are promising for further orthopedic procedures. In this work, we present an adapted electroforming approach to attain a biomorphic nano-holed TiO 2 coating on Ti6Al4V alloy. Through a precise control of the anodization conditions, structures revealed the formation of localized nano-pores arranged in a periodic assembly. This specific organization provoked higher stability against thermal oxidation and precise hydrophobic wettability behavior according to Cassie−Baxter's model; both characteristics are a prerequisite to ensure a favorable biological response in an implantable structure for guided bone regeneration. In addition, the periodically arranged sub-wavelength-sized unit cell on the metallic−dielectric structure exhibits a peculiar optical response, which results in higher NIR reflectivity. Accordingly, we have proved that this effect enhances the efficiency of the scattering processes and provokes a significant improvement of light confinement producing a spontaneous NIR fluorescence emission. The combination of the already favorable mechanical and biocompatibility properties of Ti6Al4V, along with suitable thermal stability, wetting, and electro-optical behavior, opens a promising path toward strategic bone therapeutic procedures.

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Exploring the Phase Transformation Mechanism of Titanium Dioxide by High Temperature in Situ Method

Cited by 16 publications

References 3 publications

Growth Mechanism and Film Properties of Atomic-Layer-Deposited Titanium Oxysulfide

Growth Mechanism and Film Properties of Atomic-Layer-Deposited Titanium Oxysulfide

Rutile-Coated B-Phase TiO₂ Heterojunction Nanobelts for Photocatalytic H₂ Evolution

NIR-Reflective and Hydrophobic Bio-Inspired Nano-Holed Configurations on Titanium Alloy

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Exploring the Phase Transformation Mechanism of Titanium Dioxide by High Temperature in Situ Method

Cited by 16 publications

References 3 publications

Growth Mechanism and Film Properties of Atomic-Layer-Deposited Titanium Oxysulfide

Growth Mechanism and Film Properties of Atomic-Layer-Deposited Titanium Oxysulfide

Rutile-Coated B-Phase TiO2 Heterojunction Nanobelts for Photocatalytic H2 Evolution

NIR-Reflective and Hydrophobic Bio-Inspired Nano-Holed Configurations on Titanium Alloy

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Rutile-Coated B-Phase TiO₂ Heterojunction Nanobelts for Photocatalytic H₂ Evolution