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Title: Mixed oxide nanoparticles and method of making

Patent ·
OSTI ID:874704
 [1];  [2];  [3];  [1]
  1. Oak Ridge, TN
  2. Knoxville, TN
  3. Columbia, MO
+ Show Author Affiliations

Methods and apparatus for producing mixed oxide nanoparticulates are disclosed. Selected thermophilic bacteria cultured with suitable reducible metals in the presence of an electron donor may be cultured under conditions that reduce at least one metal to form a doped crystal or mixed oxide composition. The bacteria will form nanoparticles outside the cell, allowing easy recovery. Selection of metals depends on the redox potentials of the reducing agents added to the culture. Typically hydrogen or glucose are used as electron donors.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
DOE Contract Number:
AC05-84OR21400
Assignee:
Ut-Battelle, LLC (Oak Ridge, TN)
Patent Number(s):
US 6444453
Application Number:
09/428,376
OSTI ID:
874704
Country of Publication:
United States
Language:
English

References (9)

Iron reduction by psychrotrophic enrichment cultures journal December 1999
Physiochemical, mineralogical, and isotopic characterization of magnetite-rich iron oxides formed by thermophilic iron-reducing bacteria journal November 1997
Dissimilatory Metal Reduction journal October 1993
Thermophilic Fe(III)-Reducing Bacteria from the Deep Subsurface: The Evolutionary Implications journal August 1997
Anaerobic production of magnetite by a dissimilatory iron-reducing microorganism journal November 1987
Iron and Manganese in Anaerobic Respiration: Environmental Significance, Physiology, and Regulation journal October 1994
Geology and Stable Isotope Geochemistry of the Biwabik Iron Formation, Northern Minnesota journal November 1973
Magnetic Microstructure of Magnetotactic Bacteria by Electron Holography journal December 1998
Enhancement of Fe(III), Co(III), and Cr(VI) reduction at elevated temperatures and by a thermophilic bacterium journal March 1996

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Related Subjects

mixed
oxide
nanoparticles
method
methods
apparatus
producing
nanoparticulates
disclosed
selected
thermophilic
bacteria
cultured
reducible
metals
presence
electron
donor
conditions
reduce
metal
form
doped
crystal
composition
outside
cell
allowing
easy
recovery
selection
depends
redox
potentials
reducing
agents
added
culture
typically
hydrogen
glucose
donors
reducing agent
electron donor
mixed oxide
/435/