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Magnetic circular dichroism instrumentation at LNLS
(Soc Brasileira FisicaSao PauloBrasil, 2007)
Effect of thermal treatment on solid-solid interface of hematite thin film synthesized by spin-coating deposition solution
(2016-04-01)
This work describes hematite films prepared by a spin-coating deposition solution (SCDS) method that is a sol-gel method derived technique. Hematite films were prepared at two heat treatment temperatures (500 °C and 800 ...
Magnetic properties of spindle-type iron fine particles obtained from hematite
(2001-12-01)
Spindle-type iron fine particles have been prepared by reduction of silica-coated-hematite particles. Hydrogen reduction of the coated-hematite cores yielded uniform spindle-type iron particles, which were stabilized by ...
Nb-containing hematites Fe2-xNbxO3: The role of Nb5+ on the reactivity in presence of the H2O2 or ultraviolet light
(Elsevier B.V., 2009-03-31)
A series of Nb-containing hematites, Fe-2-xNbxO3 (%Nb = 0.00, 1.49, 5.00 and 9.24) was prepared using the conventional co-precipitation method. Mossbauer and temperature-programmed reduction (TPR) measurements suggested ...
Nontronite mineral clay NAu-2 as support for hematite applied as catalyst for heterogeneous photo-Fenton processes
(2021-08-01)
This study describes the characterization of Nontronite, a clay mineral with high content of structural iron, before and after iron incorporation and 600 °C heat treatment. The Nontronite was classified as a mesoporous ...
Synthesis of hematite nanowires using a mesoporous hard template
(Springer Verlag Berlín, 2009-12)
The influence of the impregnation media (ethanol or water) and the calcination atmosphere (air and NO/He) on the hematite nanowires production embedded on a hard template (MCM-41) was studied. The solids were characterized ...
A Monte Carlo model of the MCD behavior of hematite colloids
(Elsevier Science BvAmsterdamHolanda, 2003)
Color in subtropical brazilian soils as determined with a Munsell chart and by diffuse reflectance spectroscopy
(2020-10-01)
The color of soils provides useful information about their origin and allows their classification. Soil color has traditionally been determined with a Munsell chart; lately, however, alternative techniques such as diffuse ...
Magnetic and spectral signatures of Cerrado soils in the state of Goias, Brazil
(Empresa Brasil Pesq Agropec, 2017-10-01)
The objective of this work was to estimate the iron oxide contents (hematite and goethite) and to characterize the color and the spectral and magnetic signatures of Cerrado soils in the state of Goias, Brazil. Six Oxisols ...
Pristine and Al-doped hematite printed films as photoanodes of p-type dye-sensitized solar cells
(2017-01-01)
We hereby propose a non-expensive method for the deposition of pure and Al-doped hematite photoanodes in the configuration of thin films for the application of dye-sensitized solar cells (DSSC). The electrodes have been ...