Quaternary oxides and catalysts containing quaternary oxides
AssigneeThe Board of Trustees of the University of Illinois
InventorsRong-Cai Xie, Jian-Ku Shang, Pinggui Wu
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Abstract
A quaternary oxide includes a dopant metal, a dopant nonmetal, titanium, and oxygen. The atomic ratio of titanium, oxygen and dopant nonmetal may be 1:0.5-1.99:0.01-1.5. Quaternary oxides may be used in catalytic compositions, in coatings for disinfecting surfaces and in coatings for self-cleaning surfaces. A method of making a quaternary oxide includes combining ingredients including a titanium source, a dopant nonmetal source, a dopant metal salt, and a polar organic solvent to form a reaction mixture; and heating the reaction mixture.
Claims26
A quaternary oxide, comprising:
- a dopant metal,
- a dopant nonmetal,
- titanium, and
- oxygen;
- where the atomic ratio of titanium, oxygen and dopant nonmetal is 1:0.5-1.99:0.01-1.5.
A catalytic composition, comprising:
- a quaternary oxide comprising a dopant metal, a dopant nonmetal, titanium and oxygen;
- where the atomic ratio of titanium, oxygen and dopant nonmetal is 1:0.5-1.99:0.01-1.5.
(canceled)
(canceled)
A disinfecting surface, comprising:
- a coating on a substrate,
- the coating comprising a quaternary oxide comprising a dopant metal, a dopant nonmetal, titanium and oxygen;
- where when bacteria are in contact with the composition and are irradiated with visible light, the concentration of living bacteria is reduced by 20% within 1 hour.
(canceled)
A self-cleaning surface, comprising:
- a coating on a substrate,
- the coating comprising a quaternary oxide comprising a dopant metal, a dopant nonmetal, titanium and oxygen;
- where when an organic substance is in contact with the coating and is irradiated with visible light, the concentration of the organic substance is reduced by 40% within 4 hours.
A method of making a quaternary oxide, comprising:
- combining ingredients to form a reaction mixture, the ingredients comprising
- a titanium source,
- a dopant nonmetal source,
- a dopant metal salt, and
- a polar organic solvent;
- and
- heating the reaction mixture.
22-38. (canceled)
A method of making a quaternary oxide, comprising:
- combining a titanium source and a dopant nonmetal source with a polar organic solvent to form a first mixture;
- adding a dopant metal salt to the first mixture to form a reaction mixture;
- heating the reaction mixture at a temperature of from 50° C. to 250° C. for a period of at least 4 hours;
- removing a precipitate from the reaction mixture;
- and
- calcining the precipitate.
40-41. (canceled)
A method of making a quaternary oxide, comprising:
- combining a polar organic solvent with a dopant nonmetal source to form a first mixture;
- adding a titanium source to the first mixture to form a second mixture;
- adding a dopant metal salt to the second mixture to form a reaction mixture;
- and
- heating the reaction mixture in an autoclave at a temperature of from 100° C. to 350° C. for a period of at least 4 hours.
43-45. (canceled)
Dependencies are inferred from the claim text.