anatase rutile nanoparticles

anatase rutile nanoparticles

Rutile and Anatase TiO2 Nanoparticles and Applications ...

Jul 05, 2019 · Rutile titanium dioxide is optically positive, whereas Anatase titanium dioxide is optically negative. 4.Occurrences of Anatase and Rutile TiO2 Nanoparticles. Rutile is a type of titanium dioxide that is found naturally in huge quantity as compared to anatase titanium dioxide. 5.UV absorptions of Anatase and Rutile Titanium Oxide Nanoparticles.

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Effect of anatase & rutile TiO2 nanoparticles on bone ...

Email [email protected] Purpose: To evaluate the effects of anatase and rutile TiO 2 nanoparticles (NPs) on the growth and development of bones in young rats and explore their possible mechanisms. Methods: Three-week-old male rats were orally administered anatase TiO 2 NPs and rutile TiO 2 NPs for 28 days.

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Roles of anatase and rutile TiO2 nanoparticles in ...

Apr 01, 2007 · Anatase and rutile TiO 2 nanoparticles were supplied by Taixin Nanomaterials Co., China. For making PU/TiO 2 composites, either the anatase or rutile TiO 2 nanoparticles were mixed with water (weight ratio 1:2), and then the mixture was incorporated into PU latex at an appropriate proportion under stirring for 10 ...

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Oral administration of rutile and anatase TiO 2 ...

Oral administration of rutile and anatase TiO 2 nanoparticles shifts mouse gut microbiota structure Nanoscale . 2018 Apr 26;10(16):7736-7745. doi: 10.1039/c8nr00386f.

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Synthesis of nanoparticulate anatase and rutile ...

Anatase has been reported to exhibit higher photocatalytic activity than rutile. Reference Hoffmann, Martin, Choi and Bahnemann 2, Reference Li, Lee, Lee, Song and Kim 5 However, there are studies that show that rutile nanoparticles synthesized at low temperatures show similar activity but may catalyze different reaction paths compared with ...

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Roles of anatase and rutile TiO2 nanoparticles in ...

Apr 01, 2007 · Anatase and rutile TiO 2 nanoparticles were supplied by Taixin Nanomaterials Co., China. For making PU/TiO 2 composites, either the anatase or rutile TiO 2 nanoparticles were mixed with water (weight ratio 1:2), and then the mixture was incorporated into PU latex at an appropriate proportion under stirring for 10 ...

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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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Impact of anatase and rutile titanium dioxide ...

Impact of anatase and rutile titanium dioxide nanoparticles on uptake carriers and efflux pumps in Caco-2 gut epithelial cells Nanoscale . 2015 Apr 28;7(16):7352-60. doi: 10.1039/c5nr00505a.

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Synthesis of nanoparticulate anatase and rutile ...

Anatase has been reported to exhibit higher photocatalytic activity than rutile. Reference Hoffmann, Martin, Choi and Bahnemann 2, Reference Li, Lee, Lee, Song and Kim 5 However, there are studies that show that rutile nanoparticles synthesized at low temperatures show similar activity but may catalyze different reaction paths compared with ...

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Toxicity assessment of anatase and rutile titanium dioxide ...

Titanium dioxide nanoparticles (TiO 2 NPs), in the two crystalline forms, rutile and anatase, have been widely used in many industrial fields, especially in cosmetics. Therefore, a lot of details about their safety issues have been discussed by the scientific community. Many studies have led to a general agreement about TiO 2 NPs toxicity, in particular for anatase form, but no mechanism ...

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Transition from anatase to rutile phase in titanium ...

Dec 20, 2012 · In this work, the structural and optical properties of titanium dioxide (TiO2) nanopowders are studied. The TiO2 nanoparticles were synthesized by complexing sol–gel process and effect of complexing agents on transition of the anatase phase to rutile phase during the heat treatment have been investigated. In addition, we have studied the grain size of TiO2 powders and their dependence

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Doping Rh into TiO2 as a visible-light-responsive ...

Nov 22, 2021 · At 873 K, both the Rh-rutile and Rh-anatase grains had surface nanoparticles ranging from 5 to 10 nm, which were supposed to be amorphous Rh 2 O 3 produced from oxidation of the RhCl 3 precursor. When the calcination temperature was elevated to 973 K, the Rh 2 O 3 nanoparticles were barely observed on the surface of Rh-rutile grain while still ...

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X-ray diffraction pattern of titanium dioxide phases: (a ...

Biphasic anatase and rutile nanoparticles at a ratio of 4:1 provided the highest photocatalytic activity and no catalytic activity was observed in amorphous phases. Although anatase nanoparticles ...

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Heat-stimulated crystallization and phase transformation ...

Once nanoparticles of anatase have achieved the average size of 35 nm, in the temperature range of 800 – 900 °C the anatase-to-rutile transition occurs and above 1000 °C only rutile phase is detected.

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Research perspectives on the photocatalytic activity of ...

Aug 01, 2021 · Untreated nanoparticle rutile I is also photoactive but less effective than any of the anatase grades. The pigmentary anatase A is less active than any of the nanoparticle grades (E-I). Thus, the finer nanoparticles clearly have a greater particle matrix contact inducing more oxidation.

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Comparison of Size-Dependent Structural and Electronic ...

Size-dependent variations in the electronic and structural properties of anatase and rutile nanoparticles have been compared. The anatase nanoparticles of the present study were prepared by hydrothermal ripening of an anatase sol and had diameters in the range 2−130 nm whereas the rutile nanoparticles were prepared by calcination of sol−gel derived rutile and had diameters in the range 3.6 ...

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Effects of Calcination Temperature on the Phase ...

Apr 27, 2021 · The mixed anatase/rutile-phase TiO 2 nanoparticles calcined at 700 °C delivered the highest photocatalytic performance, superior to that of the commercial photocatalyst Degussa P25, because of the synergistic effects of crystallinity and phase structure. The photocatalytic virus inactivation tests with the MS2 bacteriophage, murine norovirus ...

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Ag/GO/TiO2 nanocomposites: the role of the interfacial ...

Oct 29, 2021 · The average crystallite size was calculated as shown in table 1 using the Scherrer equation from the crystalline planes (110) for rutile and (101) for anatase. The TiO 2 nanoparticles in the anatase phase are smaller than the nanoparticles in the rutile phase due to the surface energy of these phases, which is in accordance with the literature .

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Investigation on the synergetic effect between anatase and ...

Sep 01, 2004 · From our experimental results, a synergetic effect between the nanoparticles of anatase and rutile in the biphase catalysts is observed. The biphase photocatalyst containing 12–15% rutile and 85–88% anatase displays good activity and stability for the gas-phase oxidation reactions.

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Tuning Anatase-Rutile Phase Transition Temperature: TiO2 ...

Tuning Anatase-Rutile Phase Transition Temperature: TiO 2 /SiO 2 Nanoparticles Applied in Dye-Sensitized Solar Cells Billy N. Cardoso , 1 Emerson C. Kohlrausch , 2 Marina T. Laranjo , 1 Edilson V. Benvenutti , 1 Naira M. Balzaretti , 3 Leliz T. Arenas , 1 Marcos J. L. Santos , 2 and Tania M. H. Costa 1 , 3

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

The coexistence of anatase and rutile phases in a TiO2 nanoparticle is visually confirmed by HRTEM analysis. These mixed-phase TiO2 nanoparticles are examined as candidates for photoelectrodes of dye-sensitized solar cells (DSSCs). The J-V curves and IPCE spectra for the DSSCs prepared from the mixed-phase TiO2 nanoparticles are obtained, and ...

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Oral administration of rutile and anatase TiO2 ...

The widespread application of TiO 2 nanoparticles (NPs) as additives in foods such as gum, candy and puddings has dramatically increased the human ingestion and accumulation of these nanomaterials. Although the toxicity of TiO 2 NPs has been extensively studied, their impact on gut microbiota in vivo still needs further research. In this study, TiO 2 NPs with two main crystalline phases ...

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Comparison of Size-Dependent Structural and Electronic ...

Size-dependent variations in the electronic and structural properties of anatase and rutile nanoparticles have been compared. The anatase nanoparticles of the present study were prepared by hydrothermal ripening of an anatase sol and had diameters in the range 2−130 nm whereas the rutile nanoparticles were prepared by calcination of sol−gel derived rutile and had diameters in the range 3.6 ...

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Selective synthesis of brookite, anatase and rutile ...

Aug 01, 2007 · The three polymorphs of titania (anatase, rutile and brookite) have been obtained as nanoparticles selectively and with well definite morphologies (platelets of brookite, rods of rutile) by thermohydrolysis of TiCl 4 in concentrated aqueous nitric acid. The selectivity of the synthesis depends strongly on the acidity of the medium.

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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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Doping Rh into TiO2 as a visible-light-responsive ...

Nov 22, 2021 · At 873 K, both the Rh-rutile and Rh-anatase grains had surface nanoparticles ranging from 5 to 10 nm, which were supposed to be amorphous Rh 2 O 3 produced from oxidation of the RhCl 3 precursor. When the calcination temperature was elevated to 973 K, the Rh 2 O 3 nanoparticles were barely observed on the surface of Rh-rutile grain while still ...

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Research perspectives on the photocatalytic activity of ...

Aug 01, 2021 · Untreated nanoparticle rutile I is also photoactive but less effective than any of the anatase grades. The pigmentary anatase A is less active than any of the nanoparticle grades (E-I). Thus, the finer nanoparticles clearly have a greater particle matrix contact inducing more oxidation.

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Responses of freshwater biofilm formation processes (from ...

Sep 01, 2020 · Differential toxicity of anatase and rutile TiO2 nanoparticles to the antioxidant enzyme system and metabolic activities of freshwater biofilms based on microelectrodes and fluorescence in situ hybridization. Environ. Sci. Nano, 6 (8) (2019), pp. 2626-2640. CrossRef View Record in

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Occurrence of titanium dioxide nanoparticle in Taihu Lake ...

Nov 22, 2021 · Rutile is widely present in nature as a TiO 2-containing mineral (Yu et al. 2013). Moreover, rutile has been massively produced for several decades. Similarly, anatase has a high photocatalytic activity and is used widely in products. Therefore, it is not surprising that rutile and anatase are detected in the samples.

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Molecular‐Level Understanding of the Photocatalytic ...

Oct 14, 2014 · Molecular‐Level Understanding of the Photocatalytic Activity Difference between Anatase and Rutile Nanoparticles † Dr. Wooyul Kim School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 790‐784 (Republic of Korea)

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Synergistic effect between anatase and rutile TiO2 ...

A synergistic effect between anatase and rutile TiO 2 is known, in which the addition of rutile can remarkably enhance the photocatalytic activity of anatase in the degradation of organic contaminants. In this study, mixed-phase TiO 2 nanocomposites consisting of anatase and rutile nanoparticles (NPs) were prepared for use as photoanodes in dye-sensitized solar cells (DSSCs) and were ...

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Metastability of anatase: size dependent and irreversible ...

Jun 07, 2013 · On the other hand, some theoretical simulations predict that the anatase phase is conversely more stable than the rutile phase for nanocrystals less than 14 nm in size 24,25,26,27, Because these ...

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