Results 81 to 90 of about 18,694 (284)
Electronic and optical properties of FeSe2 polymorphs: solar cell absorber [PDF]
arXiv, 2013 Electronic and optical properties of semiconducting FeSe2 polymorphs (marcasite and pyrite) were evaluated using density functional theory with norm-conserving pseudopotential. Marcasite and pyrite of FeSe2 show indirect band gaps of 0.86 eV and 0.67 eV respectively.
arxiv
1 min synthesis of phase pure nanocrystalline high‐entropy sulfides for efficient water electrolysis
EcoEnergy, EarlyView.High‐entropy sulphide spinels are synthesized with up to 8 different metal cations by an extremely short synthesis time of only 1 min and temperature of only 200–230°C. We further demonstrate the activity of the obtained nanosheets for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER).
Judith Zander, Roland Marschall
wiley +1 more source
The mechanism of ultrasound oxidation effect on the pyrite for refractory gold ore pretreatment
Arabian Journal of Chemistry, 2021 The effect of ultrasonic cavitation on the oxidation of the crystal pyrite in deionized water has been discussed. The effect of solution alkalinity, ultrasonic power and temperature on the surface morphology of pyrite and the chemical forms of sulfur and
Qihao Gui, Shixing Wang, Libo Zhang
doaj
Decomposition of Iron Pyrites [PDF]
Nature, 1875 THE “curious phenomenon” described by Mr. Frederic Case (NATURE, vol. xi. p. 249) is by no means an uncommon one. It is due to oxidation, and the conversion of a portion of the pyrites into soluble sulphate of iron. This decomposition is much aided by the presence of moisture; it is very doubtful whether it would occur at all in a dry atmosphere, and I
openaire +2 more sources
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This work highlights the incorporation of titanium and other metal elements into the sulfide structure, forming HES (i.e., GS‐3) that facilitates efficient catalytic conversion and enhances the cycling performance of Li‐S batteries. The pursuit of highly efficient electrocatalysts is of utmost significance in the relentless drive to enhance the ...
Hassan Raza +7 more
wiley +1 more source
Influence of Ca2+ and Mg2+ on Pyrite Flotation at Different Slurry Temperatures
Kuangchan zonghe liyongThis is an article in the field of mineral processing engineering. Through single mineral flotation test, solution chemistry calculation, Zeta potential detection, XPS detection, the influence and regulation mechanism of Ca2+ and Mg2+ on the flotation of
Xin WANG +4 more
doaj +1 more source
Lunar ore geology and feasibility of ore mineral detection using a far-IR spectrometer [PDF]
Frontiers in Earth Science 11, 1190825 (2023)Lunar sulfides and oxides are a significant source of noble and base metals and will be vital for future human colonies' self-sustainability. Sulfide detection (pyrite and troilite) applies to many technological fields and use cases, for example, as a raw material source (available in situ on the Lunar surface) for new solar panel production methods ...
arxiv +1 more source
AIMS Geosciences, 2017 The Central gold belt of peninsular Malaysia comprises a number of gold deposits located in the east of the N-S striking Bentong-Raub Suture Zone. The Tersang gold deposit is a mesothermal, orogenic gold deposit, which is hosted in sandstone, shale ...
Charles Makoundi, Khin Zaw, R.R. Large
doaj +1 more source
, 2023 Published as part of Kozlov, Mikhail V., 2023, Fairy moths of the genus Nemophora Hoffmannsegg, 1798 (Lepidoptera: Adelidae) of India and Sri Lanka, pp.
openaire +2 more sources
Co‐combustion of coal and biomass waste in pilot‐scale for energy use
Environmental Progress &Sustainable Energy, EarlyView.Abstract The use of biomass in co‐combustion systems using fluidized bed technology is considered a viable alternative to reduce the emission of pollutants. The herein study presents an experimental analysis to determine the technical feasibility of using run‐of‐mine (ROM) coal and its waste combined with biomass in a combustor of bubbling fluidized ...
Pedro Rodrigo Silva Moura +6 more
wiley +1 more source