The crystalline phase of each parent TiO 2 and lanthanide ions-doped TiO 2 nanoparticles prepared by sol–gel was determined by XRD ().In parent titania and all lanthanide ions/TiO 2 photocatalysts, the figure presents a group of lines at 2θ values of 25.2°, 37.5°, 47.7°, 53.3°, 54.7° and 62° which are attributed to anatase phase. No diffraction peaks of lanthanide oxides in the ...
An improvement in the photodegradation performance for dyes due to interaction between carbon and titania in a self-assembled mesoporous C TiO 2 composite catalyst, even for the difficult degradation of azo dyes, is reported herein. The dye removal process involves adsorption of the dye from water by the mesoporous carbon–titania, followed by photodegradation on the separated dye-loaded …
Each well was then inoculated with Rare earth doped titania nanoparticles coated with silica (TiO2:- 50 000 cells in 200 ml media. The cells were added carefully to the mol%RE@SiO2) were prepared according to Townley et al.,18 Downloaded by University of Oxford on 07 July 2012 centre of each well and incubated overnight to form spheroids. ...
The rare-earth-doped titania thin films—synthesized via evaporation-induced self-assembly (EISA)—are characterized by using environmental ellipsoporosimetry, electronic microscopy (i.e. high-resolution scanning electron microscopy, HR-SEM, and transmission electron microscopy, HR-TEM), X-ray diffraction, and luminescence spectroscopy.
Rare earth (La, Pr and Nd) doped titania samples with varying the mol% (0.2, 0.4, 0.6 and 0.8) of rare earth were prepared by an incipient wetness impregnation method taking rare earth nitrates. The prepared samples were calcined at 673, 773, 873, 973 and 1000 K at the heating rate of 10 K/min in a muffle furnace four 4 h.2.2.
A series of titania–transition metal and titania–rare earth element mixtures, with the stoichiometry Ti 1−x M x O 2, where M=Ce, Eu, La, Nb, W, Y, and x ranging from 0 to 0.05 atoms per formula unit, were prepared via solid-state reaction of the precursor oxides. The products of the synthesis were thermally treated in air and two maximum temperatures (900 and 1000 °C) were reached.
Rare earth doping ions can improve the spectral response of this semiconductor to the visible region. This work evaluated the dopant effect of rare earth ions such as La, Ce, Nd, Pr, Sm, Eu, and Gd in titania for the solar photodegradation of Diuron and methyl parathion. The increase in the content up to 0.5% of dopants decreases photoactivity due to the formation of photo-generated …
Titania was synthesized using TiOSO4 as the source of titanium via hydrothermal synthesis procedure at low temperature (200 °C) and modified with selected rare earth elements, namely, Ce, La, and Gd.
A novel facile sol-gel method was used to synthesize visible-light responsive and photoluminescent rare-earth modified titania nanocomposites and coatings. Titania-silica-lanthanum phosphate nanocomposite doped with terbium ions (Tb 3+ ) was prepared by an aqueous sol-gel process and the films fabricated on glass substrates by dip coating are ...
a low temperature fired glass-ceramic system encompassing a series of temperature compensating bodies that cover a range of temperature coefficients from + 100 p.p.m./*c. to -1000 p.p.m./*c. the system consists of calcining a mixture that includes rare earth oxides, mixing a portion of this blend with calcium titanate, catio3 and calcining again, and finally firing a portion of this calcine ...
Three-dimensional (3D) titania (TiO2) hollow spheres doped with rare earth elements were successfully synthesized via a nonhydrolytic sol-gel method using lotus pollen as a biotemplate and a ...
The rare earth (La, Ce, Pr, Nd, Sm, Eu, Dy, Gd) for doped titania were used, the best photocatalytic properties in visible light have samples doped with Nd 3+ ions ( k = 0.0272 min 1 for UV and 0.0143 min 1 for visible light).
Rare-earth metals have been doped into titania paste to show an improvement in the photovoltaic performance of dye-sensitized solar cells, however, most of the reported cells are not efficient enough to conclude whether the enhancement is due to doping or it is because of the cell quality.
During radiotherapy, the reaction of radiation energy with the aqueous environment of the cell results in the generation of redox-active products. The addition of radiosensitizers can potentially amplify the effects of radiotherapy. Here, we investigated the X-ray-induced generation of reactive oxygen species (ROS) from rare earth doped titania nanoparticles. The rare earth …
A two-step process is developed to synthesize rare earth doped titania nanorods (RE–TiO 2 NRs) as photocatalysts for efficient degradation of lignin under simulated sunlight irradiation. In this approach, protonated titanate nanotubes with …
Solar desalination driven by solar radiation as heat source is freely available, however, hindered by low efficiency. Herein, we first design and synthesize black titania with a unique nanocage structure simultaneously with light trapping effect to enhance light harvesting, well-crystallized interconnected nanograins to accelerate the heat transfer from titania to water and with opening ...
It was shown that the method yields reliable data for the content of the rare earth cations in the α-SiAlON phase, even in mixtures of α-SiAlONs with β- or α-Si3N4, but cannot be used for the determination of the Al and/or O contents of the α-SiAlONs. On the basis of these data, the stability regions of Y- and Nd-α-SiAlONs were established.
Since rare earth oxides have good thermal stability and special F orbital, their doping into titania lattice could results in the formation of positions inside the TiO 2 band gap.
Using a one-step microwave method without any further calcination, various rare-earth(Re) ions doped anatase titania microspheres were synthesized successfully in less than 10 minutes. TiCl4 aqueous solution and rare-earth salt solution are used as reactant, and ethanol was used as solvent. Anatase titania microspheres doped with rare-earth ions including Ce(IV), Sm(III), Tm(III) and Tb(III ...
Ruiyu Bao, Runfu Li, Chen Chen, Hua Wu, Jianxin Xia, Chunlin Long, Hua Li, Biotemplated synthesis of 3D rare earth–doped TiO2 hollow spheres for photocatalytic application, Journal of Physics and Chemistry of Solids, 10.1016/j.jpcs.2018.10.023, (2018).
Luitel, Tulashi and Fernando, Kasun and Tatum, Brandon S and Alphenaar, Bruce W and Zamborini, Francis P "Increased efficiency of dye-sensitized solar cells by addition of rare earth oxide microparticles into a titania acceptor" Electrochimica Acta, v.211, 2016, p.918--925
In particular, it is known that nanostuctured titania (TiO2) is a promising host material for several trivalent rare earth ions. In this paper Tb- and Yb-doped titania nanofibers have been ...
Local environment of rare-earth dopants in silica–titania–alumina glasses: An extended x-ray absorption fine structure study at the K edges of Er and Yb
Rare-earth-doped nanocrystalline titania microspheres are prepared using an inexpensive and scalable ultrasonic spray pyrolysis method.Anatase titania nanocrystals distributed inside these microspheres function as sensitizers to absorb light and transfer energy to rare earth ions, which leads to intense and narrow bandwidth emission.
WIM's resource portfolio contains a high value Zircon, Rare Earth & Titania mineral assemblage. The Avonbank Project contains consistent zones of >22% Zircon (>1.1% in-situ) & >3% Rare Earths – that is expected to enable WIM to generate rapid, significant returns.
As such, titania nanoparticles were doped with gadolinium to optimize the localized energy absorption from a conventional medical X-ray, and further optimized by the …
Direct quantification of rare earth doped titania nanoparticles in individual human cells J C G Jeynes1, C Jeynes2, V Palitsin2 and H E Townley3,4 1Wellcome Trust Biomedical Modelling and Analysis Centre, University Of Exeter, UK 2Surrey Ion Beam Centre, University of Surrey, UK 3Nuffield Department of Obstetrics & Gynaecology, Women's Centre, John Radcliffe Hospital, Oxford,
Abstract. In this paper, a two-step process is developed to synthesize rare earth doped titania nanorods (RE–TiO 2 NRs) as photocatalysts for efficient degradation of lignin under simulated sunlight irradiation. In this approach, protonated titanate nanotubes with layered structures were first prepared by a hydrothermal approach, and rare earth metal ions were subsequently bound to the ...
A two-step process is developed to synthesize rare earth doped titania nanorods (RE-TiO 2 NRs) as photocatalysts for efficient degradation of lignin under simulated sunlight irradiation. In this approach, protonated titanate nanotubes with layered structures were first prepared by a hydrothermal approach, and rare earth metal ions were subsequently bound to the negatively charged surface of ...
WEST LAFAYETTE, Ind. – New efficient and inexpensive technologies being developed at Purdue University could allow the extraction of rare earth elements, critical components of many electronics and green products, from waste coal ash.. This innovation could enable the U.S. to enter into the $4 billion rare earth element production market while recycling coal ash in an environmentally ...
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نشانی: شماره 1688، جاده شرقی گاوک، منطقه جدید پودونگ، شانگهای، چین.
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