Catalyzed Destructive Adsorption of Environmental Toxins with Nanocrystalline Metal Oxides. Fluoro-, Chloro-, Bromocarbons, Sulfur, and Organophosophorus Compounds

2002 ◽  
Vol 36 (4) ◽  
pp. 762-768 ◽  
Author(s):  
Shawn P. Decker ◽  
John S. Klabunde ◽  
Abbas Khaleel ◽  
Kenneth J. Klabunde
Keyword(s):  
Metal Oxides ◽  
Environmental Toxins ◽  
Nanocrystalline Metal

Impedance Spectroscopy Screening of Various Nanocrystalline Metal Oxides: Effect of Lithiation on Electrical Properties

2017 ◽  
Vol 5 (8) ◽  
pp. 1407-1414 ◽  
Author(s):  
Jacqueline E. Cloud ◽  
Curtis J. Guild ◽  
Sourav Biswas ◽  
Steven L. Suib
Keyword(s):  
Electrical Properties ◽  
Impedance Spectroscopy ◽  
Metal Oxides ◽  
Nanocrystalline Metal

scholarly journals Nanocrystalline Metal Oxides for Methane Sensors: Role of Noble Metals

2009 ◽  
Vol 2009 ◽  
pp. 1-20 ◽  
Author(s):  
S. Basu ◽  
P. K. Basu
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Noble Metal ◽  
Gas Sensors ◽  
Noble Metals ◽  
Industrial Applications ◽  
Metal Catalyst ◽  
Nanocrystalline Metal ◽  
Sensing Properties

Methane is an important gas for domestic and industrial applications and its source is mainly coalmines. Since methane is extremely inflammable in the coalmine atmosphere, it is essential to develop a reliable and relatively inexpensive chemical gas sensor to detect this inflammable gas below its explosion amount in air. The metal oxides have been proved to be potential materials for the development of commercial gas sensors. The functional properties of the metal oxide-based gas sensors can be improved not only by tailoring the crystal size of metal oxides but also by incorporating the noble metal catalyst on nanocrystalline metal oxide matrix. It was observed that the surface modification of nanocrystalline metal oxide thin films by noble metal sensitizers and the use of a noble metal catalytic contact as electrode reduce the operating temperatures appreciably and improve the sensing properties. This review article concentrates on the nanocrystalline metal oxide methane sensors and the role of noble metals on the sensing properties.

Novel Preparation of Nano-Sized TiO2 and ZrO2 Particles by Nanocasting with Nanoporous SiO2 and Selective Dissolution

2007 ◽  
Vol 124-126 ◽  
pp. 643-646
Author(s):  
Jun Lee ◽  
Yoshihiro Sugi ◽  
Nam Jo Jeong ◽  
Gon Seo ◽  
Sung June Cho
Keyword(s):  
Metal Oxides ◽  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
Selective Dissolution ◽  
Metal Alkoxides ◽  
Nanocrystalline Metal

High surface area and uniform nano-sized TiO2 and ZrO2 were prepared readily by the infiltration of metal alkoxides into the nanoporous SiO2, SBA-15 and the following selective dissolution of SiO2. The obtained particles of TiO2 and ZrO2, 8.1 nm were nanocrystalline of which the structure were anatase and tetragonal, respectively. The surface area and pore volume of the nanocrystalline metal oxides can be increased to above 200 m2g-1 and 0.30 cm3g-1, respectively.

ChemInform Abstract: Nanocrystalline Metal Oxides as Unique Chemical Reagents/Sorbents

ChemInform ◽  
2010 ◽  
Vol 33 (4) ◽  
pp. no-no
Author(s):  
Erik Lucas ◽  
Shawn Decker ◽  
Abbas Khaleel ◽  
Adam Seitz ◽  
Shawn Fultz ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Nanocrystalline Metal ◽  
Chemical Reagents ◽  
Unique Chemical

scholarly journals Chemical Warfare Agent Simulants in Gamble’s Fluid: Is the Fluid Toxic? Can It Be Made Safer by Inclusion of Solid Nanocrystalline Metal Oxides?

2013 ◽  
Vol 2013 ◽  
pp. 1-14 ◽  
Author(s):  
Dennis Karote ◽  
Brandon Walker ◽  
Huaien Dai ◽  
Ramaswamy Krishnamoorthi ◽  
Janis Voo ◽  
...  
Keyword(s):  
Solid State ◽  
Metal Oxides ◽  
Degradation Product ◽  
Chemical Warfare Agent ◽  
Degradation Pathway ◽  
Chemical Warfare ◽  
Nanocrystalline Metal ◽  
Condensation Products ◽  
Data Analyses ◽  
Hydrolysis Of

The reactions of chemical warfare agent simulants, 2-chloroethyl ethyl sulfide (2-CEES) and di-i-propyl fluoro phosphate (DFP), in fluids have been investigated. Data analyses confirm the major degradation pathway to be hydrolysis of 2-CEES to 2-hydroxyethyl ethyl sulfide, along with minor self-condensation products. Among the three fluids examined, 2-CEES degradation was the fastest in Gamble’s fluid during a 96 h period. Upon addition of Exceptional Hazard Attenuation Materials (EHAMs) to 2-CEES containing Gamble’s fluid, degradation was generally improved during the first 24 h period. The 96 h outcome was similar for fluid samples with or without EHAM 2 and EHAM 4. EHAM 1-added fluid contained only one degradation product, 2-nitroethyl ethyl sulfide. DFP degradation was the slowest in Gamble’s fluid, but was enhanced by the addition of EHAMs. FTIR and solid state31P NMR confirm the destructive adsorption of 2-CEES and DFP by the EHAMs. The results collectively demonstrate that 2-CEES and DFP decompose to various extents in Gamble’s fluid over a 96 h period but the fluid still contains a considerable amount of intact simulant. EHAM 1 appears to be promising for 2-CEES and DFP mitigation while EHAM 2 and EHAM 4 work well for early on concentration reduction of 2-CEES and DFP.

Sign in / Sign up

Export Citation Format

Share Document