Results 31 to 40 of about 9,819 (225)

Ti-Nb Mineralization of Late Carbonatites and Role of Fluids in Its Formation: Petyayan-Vara Rare-Earth Carbonatites (Vuoriyarvi Massif, Russia)

open access: yesGeosciences, 2018
This article is devoted to the geology of titanium-rich varieties of the Petyayan-Vara rare-earth dolomitic carbonatites in Vuoriyarvi, Northwest Russia. Analogues of these varieties are present in many carbonatite complexes. The aim of this study was to
Evgeniy Kozlov   +3 more
doaj   +1 more source

Brookite versus anatase TiO2 photocatalysts: Phase transformations and photocatalytic activities [PDF]

open access: yes, 2013
Titanium dioxide nanoparticles consisting of pure anatase, anatase-rich, brookite-rich, and pure brookite modifications were synthesized and characterized by X-ray diffraction, field emission-scanning electron microscopy and nitrogen adsorption.
Alkaim, Ayad   +3 more
core   +2 more sources

Catalytic coatings on steel for low-temperature propane prereforming to solid oxide fuel cell (SOFC) application [PDF]

open access: yes, 2009
Catalyst layers (4–20 lm) of rhodium (1 wt%) supported on alumina, titania, and ceria–zirconia (Ce0.5Zr0.5O2) were coated on stainless-steel corrugated sheets by dip-coating in very stable colloidal dispersions of nanoparticles in water.
Alphonse, Pierre, Ansart, Florence
core   +2 more sources

Hydrogen-doped Brookite TiO2 Nanobullets Array as a Novel Photoanode for Efficient Solar Water Splitting [PDF]

open access: yes, 2016
As a representative photocatalyst for photoelectrochemical solar water splitting, TiO2 has been intensively studied but most researches have focused on the rutile and anatsase phases because brookite, another important crystalline polymorph of TiO2 ...
A Di Paola   +36 more
core   +1 more source

Tuning of perovskite solar cell performance via low-temperature brookite scaffolds surface modifications

open access: yesAPL Materials, 2017
The nature of metal oxide scaffold played a pivotal role for the growth of high quality perovskites and subsequently facilitates efficient photovoltaics devices.
Trilok Singh   +5 more
doaj   +1 more source

Preparation Techniques of TiO2 Nanofluids and Challenges: A Review

open access: yesApplied Sciences, 2018
Titanium dioxide (TiO2) has been used extensively because of its unique thermal and electric properties. Different techniques have been used for the preparation of TiO2 nanofluids which include single-step and two-step methods. In the natural world, TiO2
Hafiz Muhammad Ali   +5 more
doaj   +1 more source

Textural evolution and phase transformation in titania membranes: Part 1. -unsupported membranes [PDF]

open access: yes, 1993
Textural evolution in sol–gel derived nanostructured unsupported titania membranes has been studied using differential scanning calorimetry (DSC), differential thermal analysis (DTA), thermal gravimetry (TG), X-ray diffraction (XRD) and N2 adsorption ...
Burggraaf, Anthonie J.   +2 more
core   +3 more sources

First-Principles Investigation of Ru- and Pt-Doped TiO2 Brookite Surfaces

open access: yesInternational Journal of Electrochemical Science, 2020
The electronic structures and optical properties of brookite TiO2 (100) and (110) surfaces doped with transition metals (Ru and Pt) have been investigated by first-principles calculations based on the density functional theory, employing generalized ...
Ratshilumela Steve Dima   +2 more
doaj   +1 more source

A polarizable interatomic force field for TiO$_2$ parameterized using density functional theory [PDF]

open access: yes, 2010
We report a classical interatomic force field for TiO$_2$, which has been parameterized using density functional theory forces, energies, and stresses in the rutile crystal structure.
E. P. Meagher   +9 more
core   +2 more sources

XV. The crystal structure of brookite [PDF]

open access: yesZeitschrift für Kristallographie - Crystalline Materials, 1928
None. ; © 2014 Oldenbourg Wissenschaftsverlag GmbH. Published Online: 2015-09-18. Published in Print: 1928-12-01. Received May 29th, 1928. Gates Chemical Laboratory, California Institute of Technology. Contribution No. 177.
Pauling, Linus, Sturdivant, J. H.
openaire   +2 more sources

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