Efficient Liquid‐Assisted Grinding Selective Aqueous Oxidation of Sulfides Using Supported Heteropolyacid Catalysts

ChemCatChem ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2537-2545 ◽  
Author(s):  
Valeria Trombettoni ◽  
Ana Franco ◽  
A. Gabriel Sathicq ◽  
Christophe Len ◽  
Gustavo P. Romanelli ◽  
...  
Keyword(s):  
Oxidation Of Sulfides ◽  
Aqueous Oxidation

Spectral identification of hydrated sulfates on Mars and comparison with acidic environments on Earth

2004 ◽  
Vol 3 (4) ◽  
pp. 275-285 ◽  
Author(s):  
Janice L. Bishop ◽  
M. Darby Dyar ◽  
Melissa D. Lane ◽  
Jillian F. Banfield
Keyword(s):  
Chemical Weathering ◽  
Near Infrared ◽  
Mine Drainage ◽  
Iron Sulfate ◽  
Rock Outcrops ◽  
Sulfate Minerals ◽  
Oxidation Of Sulfides ◽  
Meridiani Planum ◽  
Long Time ◽  
Aqueous Oxidation

We interpret recent spectral data of Mars collected by the Mars Exploration Rovers to contain substantial evidence of sulfate minerals and aqueous processes. We present visible/near-infrared (VNIR), mid-IR and Mössbauer spectra of several iron sulfate minerals and two acid mine drainage (AMD) samples collected from the Iron Mountain site and compare these combined data with the recent spectra of Mars. We suggest that the sulfates on Mars are produced via aqueous oxidation of sulfides known to be present on Mars from Martian meteorites. The sulfate-rich rock outcrops observed in Meridiani Planum may have formed in an acidic environment similar to AMD environments on Earth. Because microorganisms are typically involved in the oxidation of sulfides to sulfates in terrestrial AMD sites, sulfate-rich rock outcrops on Mars may be a good location to search for evidence of life on that planet. Whether or not life evolved on Mars, following the trail of sulfate minerals is likely to lead to aqueous processes and chemical weathering. Our results imply that sulfate minerals formed in Martian soils via chemical weathering, perhaps over very long time periods, and that sulfate minerals precipitated following aqueous oxidation of sulfides to form the outcrop rocks at Meridiani Planum.

ChemInform Abstract: Synthesis of New Chiral Ligands Based on Thiophene Derivatives for Use in Catalytic Asymmetric Oxidation of Sulfides.

ChemInform ◽  
2011 ◽  
Vol 42 (31) ◽  
pp. no-no
Author(s):  
Yong-Chul Jeong ◽  
Dae-Jun Ahn ◽  
Woo-Sun Lee ◽  
Seung-Han Lee ◽  
Kwang-Hyun Ahn
Keyword(s):  
Chiral Ligands ◽  
Asymmetric Oxidation ◽  
Oxidation Of Sulfides ◽  
Thiophene Derivatives ◽  
Catalytic Asymmetric

In situ construction of phenanthroline-based cationic radical porous hybrid polymers for metal-free heterogeneous catalysis

2021 ◽  
Vol 9 (12) ◽  
pp. 7556-7565
Author(s):  
Guojian Chen ◽  
Yadong Zhang ◽  
Ke Liu ◽  
Xiaoqing Liu ◽  
Lei Wu ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Heterogeneous Catalysts ◽  
Hybrid Polymers ◽  
Metal Free ◽  
Oxidation Of Sulfides

Constructing phenanthroline-based cationic radical porous hybrid polymers as versatile metal-free heterogeneous catalysts for both oxidation of sulfides and CO2 conversion.

scholarly journals A nickel nanoparticle engineered CoFe2O4/SiO2–NH2@carboxamide composite as a novel scaffold for the oxidation of sulfides and oxidative coupling of thiols

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14717-14729
Author(s):  
Mina Zohrevandi ◽  
Roya Mozafari ◽  
Mohammad Ghadermazi
Keyword(s):  
Oxidative Coupling ◽  
Nickel Nanoparticle ◽  
Oxidation Of Sulfides ◽  
Novel Scaffold

The preparation of a Ni–carboxamide complex supported on CoFe2O4 for the oxidation of sulfides and oxidative coupling of thiols.

Supported Silver-Nanoparticle-Catalyzed Highly Efficient Aqueous Oxidation of Phenylsilanes to Silanols

2008 ◽  
Vol 120 (41) ◽  
pp. 8056-8058 ◽  
Author(s):  
Takato Mitsudome ◽  
Shusuke Arita ◽  
Haruhiko Mori ◽  
Tomoo Mizugaki ◽  
Koichiro Jitsukawa ◽  
...  
Keyword(s):  
Silver Nanoparticle ◽  
Highly Efficient ◽  
Aqueous Oxidation

Asymmetric oxidation of sulfides by LDH supported OsO4 catalyst

2005 ◽  
Vol 226 (1) ◽  
pp. 119-122 ◽  
Author(s):  
M. Lakshmi Kantam ◽  
B. Veda Prakash ◽  
B. Bharathi ◽  
Ch. Venkat Reddy
Keyword(s):  
Asymmetric Oxidation ◽  
Oxidation Of Sulfides
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