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Interactions of Arsine with Nanoporous Carbons: Role of Heteroatoms in the Oxidation Process at Ambient Conditions
- Source :
- The Journal of Physical Chemistry C. 114:6527-6533
- Publication Year :
- 2010
- Publisher :
- American Chemical Society (ACS), 2010.
-
Abstract
- Two carbons obtained from polymers containing no ash and commercial wood based carbons, as received and modified with nitrogen, were tested as adsorbents of arsine in dynamic conditions at room temperature. The chemical and structural features of the initial and exhausted carbons were analyzed by energy dispersive X-ray spectroscopy, X-ray fluorescence spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analyses, adsorption of nitrogen, and sorption of water. It was found that heteroatoms present on the surface of the carbons studied, namely oxygen, nitrogen, and sulfur, catalyze arsine oxidation mainly to arsenic tri- and pentoxide and/or in the formation of arsenic sulfides. When the surface has a high degree of hydrophilicity and water is present in the system it blocks these active centers resulting in the negligible arsine removal capacity. On the other hand, on a relatively hydrophobic surface with active nitrogen species arsine is adsorbed and oxidized to ars...
- Subjects :
- Heteroatom
Inorganic chemistry
chemistry.chemical_element
Sorption
Nitrogen
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
chemistry.chemical_compound
General Energy
Adsorption
Arsine
chemistry
Pentoxide
Physical and Theoretical Chemistry
Fourier transform infrared spectroscopy
Arsenic
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 114
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi...........10e06176ebc2ef69d58b9f918d435105