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anatase rutile nanoparticles

Rutile and Anatase TiO2 Nanoparticles and Applications ...

5 行  Rutile and anatase Titanium Dioxide nanoparticles are 2 mineralogical types of titanium ...

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Phase-pure TiO(2) nanoparticles: anatase, brookite and rutile

Anatase nanoparticles were obtained using acetic acid, while phase-pure rutile and brookite nanoparticles were obtained with hydrochloric acid at a different concentration. The nanomaterials were characterized using x-ray diffraction, UV-visible reflectance spectroscopy, dynamic light scattering, and transmission electron microscopy.

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Anatase-to-Rutile Phase Transition in TiO2 Nanoparticles ...

Anatase-to-Rutile Phase Transition in TiO2 Nanoparticles Irradiated by Visible Light The Journal of Physical Chemistry C. The light-induced phase transition of TiO2 nanoparticles from anatase to rutile structure is reported depending on the surrounding environment, the transition being accomplished under oxygen-poor conditions.

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Oral administration of rutile and anatase TiO 2 ...

Rutile NPs had a more pronounced influence on the gut microbiota than anatase NPs. The most influenced phylum was Proteobacteria, which was significantly increased by rutile but not by anatase. At the genus level, Prevotella was significantly decreased by both the TiO2 NPs, Rhodococcus was enriched by rutile NPs, and Bacteroides was increased by anatase NPs.

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Effects of aging and transformation of anatase and rutile ...

05-11-2020  Nanoparticles age in aquatic environments according to the environmental conditions. • We investigated both pristine and aged anatase (TiO 2-A) and rutile (TiO 2-R) NPs. • Sludge P removal responses were closely related to crystal structure of TiO 2-NPs. • Failure of P removal was mainly due to destruction in genus levels of PAOs. •

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Oral administration of rutile and anatase TiO 2 ...

Rutile NPs had a more pronounced influence on the gut microbiota than anatase NPs. The most influenced phylum was Proteobacteria, which was significantly increased by rutile but not by anatase. At the genus level, Prevotella was significantly decreased by both the TiO2 NPs, Rhodococcus was enriched by rutile NPs, and Bacteroides was increased by anatase NPs.

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Difference between Anatase and Rutile Titanium Dioxide ...

The rutile nanoparticles have a high affinity to phospholipids while the anatase nanoparticles have high affinity to proteins. These differences enhance the range of applications of titanium ...

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Preparation of anatase/rutile mixed-phase titania ...

Four different anatase/rutile (AR) mixed-phase TiO2 nanoparticles (AR-3, AR-15, AR-20, and AR-23 denoted for the samples of 3%, 15%, 20%, and 23% rutile phase, respectively) are prepared and characterized by powder X-ray diffraction (PXRD) and transmission electron microscopy (TEM).

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Sol-gel synthesis of mesoporous anatase-brookite and ...

15-03-2015  XRD results revealed that a mixture of anatase and brookite can be obtained in the as-synthesized samples and in those calcined up to 800°C depending on the pH used to obtain the final product. Indeed, a mixture of anatase brookite and rutile; or a sample with only rutile phase can be yielded through further calcination of the as-prepared samples at temperatures ⩾600°C due to phase

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Difference Between Rutile and Anatase Titanium Dioxide ...

17-05-2018  Anatase is optically negative (while rutile is optically positive). It has a metallic appearance when compared to the appearance of rutile. Sometimes, manufacturers produce this mineral as a synthetic compound because it has many applications in producing semiconductors.

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Photocatalytic H2 Evolution over TiO2 Nanoparticles. The ...

The highly crystalline, flame-synthesized TiO2 nanoparticles (22−36 m2 g−1) were designed to contain 4−95 mol % anatase, with the remaining being rutile. Although the amount of photocurrent generated under applied potential bias increases with increasing anatase content, a different trend was observed during photocatalytic H2 evolution in suspension form; that is, without potential bias.

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High photocatalytic activity of mixed anatase-rutile ...

05-02-2016  The synergistic effect of the anatase/rutile mixture was reported to slow down the recombination rate of photogenerated electron-hole pairs. Consequently, the photocatalytic activity was increased on these TiO 2 nanoparticles.

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Review of the anatase to rutile phase transformation ...

08-12-2010  Titanium dioxide, TiO2, 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

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Responses of freshwater biofilm formation processes

01-09-2020  The usage of anatase and rutile TiO 2-NPs is exploding in industry and commerce owing to their novel physicochemical properties. A sharp increase in two phase compositions release into the natural water environment along with industrial and municipal effluents is also anticipated (

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Difference between Anatase and Rutile Titanium Dioxide ...

The rutile nanoparticles have a high affinity to phospholipids while the anatase nanoparticles have high affinity to proteins. These differences enhance the range of applications of titanium ...

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Photocatalytic H2 Evolution over TiO2 Nanoparticles. The ...

The highly crystalline, flame-synthesized TiO2 nanoparticles (22−36 m2 g−1) were designed to contain 4−95 mol % anatase, with the remaining being rutile. Although the amount of photocurrent generated under applied potential bias increases with increasing anatase content, a different trend was observed during photocatalytic H2 evolution in suspension form; that is, without potential bias.

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Distinctive toxicity of tio2 rutile/anatase mixed phase ...

The anatase/rutile samples showed higher toxicity per unit surface area than the pure anatase powders. However, none of the samples affected cellular markers of oxidative stress. Our findings suggest that both SSA and crystallinity are critical determinants of TiO(2)-toxicity toward intestinal cells.

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Phase-Pure TiO2 Nanoparticles: Anatase, Brookite and

Anatase nanoparticles were obtained using acetic acid, while phase-pure rutile and brookite nanoparticles were obtained with hydrochloric acid at a different concentration.

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High photocatalytic activity of mixed anatase-rutile ...

05-02-2016  The synergistic effect of the anatase/rutile mixture was reported to slow down the recombination rate of photogenerated electron-hole pairs. Consequently, the photocatalytic activity was increased on these TiO 2 nanoparticles.

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Kinetics Transformation of Anatase to Rutile Phase for ...

Simple sol-gel route was used to synthesis the TiO2 nanoparticles and examined by X-ray diffraction (XRD). The small particle size and uniform morphology of the TiO2 were found at different calcination temperatures. The kinetic study of phase changes from the anatase to rutile using the X-ray diffraction data with Avrami equation was investigated.

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Tuning Anatase-Rutile Phase Transition Temperature:

The anatase-to-rutile solid-solid phase transition is found to happen in a very wide range of temperatures and is not only dependent on the size of the particles but also on the preparation method, shape of the nanostructure, and presence of dopants and structural defects [9–16].

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Review of the anatase to rutile phase transformation ...

08-12-2010  Titanium dioxide, TiO2, 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

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New insights into fluorinated TiO2 (brookite, anatase and ...

Using this method, we prepared fluorinated TiO 2 nanostructures of different phases (brookite, anatase and rutile) and investigated their structural and photocatalytic redox properties. Photocatalytic selective oxidation of MO and selective reduction of water in producing hydrogen under UV-light irradiation are employed as probe reactions to test the redox properties of the fluorinated TiO 2 of different phases.

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UV and visible light photocatalytic activity of Au/TiO 2 ...

24-01-2017  When Au nanoparticles are loaded on the interface between anatase and rutile in the TiO 2 nanoforests, as for the Branched-Au-NW, they provide a path for

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