Results 31 to 40 of about 80,576 (254)

Thickness Dependent on Photocatalytic Activity of Hematite Thin Films

open access: yesInternational Journal of Photoenergy, 2012
Hematite (Fe2O3) thin films with different thicknesses are fabricated by the rf magnetron sputtering deposition. The effects of film thicknesses on the photocatalytic activity of hematite films have been investigated.
Yen-Hua Chen, Kuo-Jui Tu
doaj   +1 more source

Identifying Temperature and Moisture Controls on Fe Oxide Origins

open access: yesGeophysical Research Letters, 2023
Magnetism, redness, and Fe oxides are indicators of pedoclimatic conditions. However, uncertainties with observing how Fe oxides form within soils has led to debates about relationships between magnetic mineral assemblages, temperature, and rainfall.
Christopher Lepre
doaj   +1 more source

Elaboration and characterization of nanoplate structured alpha-Fe2O3 films by Ag3PO4 [PDF]

open access: yes, 2016
A new strategy for surface treatment of hematite nanoplates for efficient photoelectrochemical (PEC) performances is proposed. Silver orthophosphate (Ag₃PO₄) has been adopted to mediate the formation of α-Fe₂O₃ films. Phosphate ions in Ag₃PO₄ is found to
Ke, Xuebin   +5 more
core   +2 more sources

Quantitative Research for Global Iron Ore Breakeven Operating Cost Based on BIF-type Enriched Mineralization Characteristics

open access: yesYankuang ceshi, 2017
The benchmark comparative price between global seaborne iron ore and Chinese domestic iron ore is based on free on board (FOB) or cost, insurance and freight (CIF), resulting in imprecise market pressure price estimation for Chinese domestic iron ore ...
WANG Wei-ping, CHEN Yu-chuan
doaj   +1 more source

Effect of particle size on flotation separation of hematite and quartz

open access: yes工程科学学报, 2020
Generally, the flotation performance of mineral particles in a wide size range is usually poor, which can be attributed to the high reagent consumptions and low floatability differences between valuable and gangue minerals. Classification flotation is an
Dong LI   +6 more
doaj   +1 more source

Low Temperature Oxidation of pure Iron : Growth kinetics and scale Morphologies [PDF]

open access: yes, 2004
Isothermal oxidation of pure iron has been performed in air at atmospheric pressure between 260°C and 500°C. Growth kinetics are accurately analysed and scale morphologies are investigated by SEM and TEM observations. The calculation of the variations of
Bertrand, Nathalie   +4 more
core   +1 more source

Tuning the optoelectronic properties of hematite with rhodium doping for photoelectrochemical water splitting using density functional theory approach

open access: yesScientific Reports, 2021
Hematite (Fe2O3) is one of the best candidates for photoelectrochemical water splitting due to its abundance and suitable bandgap. However, its efficiency is mostly impeded due to the intrinsically low conductivity and poor light absorption.
Abdur Rauf   +6 more
doaj   +1 more source

Characterization and mapping of surface physical properties of Mars from CRISM multi-angular data: application to Gusev Crater and Meridiani Planum [PDF]

open access: yes, 2015
The analysis of the surface texture from the particle (grain size, shape and internal structure) to its organization (surface roughness) provides information on the geological processes.
Ceamanos, X.   +7 more
core   +3 more sources

Magnetite‐Free Sn‐Doped Hematite Nanoflake Layers for Enhanced Photoelectrochemical Water Splitting

open access: yesChemElectroChem, 2022
In the present work, we report a preparation strategy for hematite phase‐pure photoanodes consisting of Sn‐doped hematite nanoflakes/hematite thin film bilayer nanostructure (Sn‐HB).
Dr. Hyo‐Jin Ahn   +6 more
doaj   +1 more source

Deepening inside the pictorial layers of Etruscan sarcophagus of Hasti Afunei: An innovative micro-sampling technique for Raman/SERS analyses [PDF]

open access: yes, 2019
The Hasti Afunei sarcophagus is a large Etruscan urn, made up of two chalky alabaster monoliths. Dated from the last quarter of the third century BC, it was found in 1826 in the small town of Chiusi (Tuscany- Il Colle place) by a landowner, Pietro Bonci ...
Bianco, Armandodoriano   +7 more
core   +1 more source

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