Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Inorganic carbon containing
Reexamination Certificate
2006-04-26
2009-06-09
Hailey, Patricia L (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Inorganic carbon containing
C502S200000, C502S350000, C148S206000, C148S210000, C148S216000, C148S240000, C148S277000, C427S446000, C427S453000, C427S255360, C427S255110, C427S255190, C427S255230, C427S255260
Reexamination Certificate
active
07544631
ABSTRACT:
The present invention provides for titanium oxide-based photocatalysts having a general formula of TiO2-X-δCXNδand self-cleaning materials that are prepared by substituting O of pure TiO2 with C and N. A preparation method comprising a process for forming thin films of TiO2-X-δCXNδby using gases such as Ar, N2, CO2, CO and O are used for reactive sputtering, and a process of heat treating at around 500° C., thereby crystallizing, is provided. The titanium oxide-based photocatalysts having a general formula of TiO2-X-δCXNδand self-cleaning materials according to the present invention have a smaller optical bandgap compared to pure titanium oxides, and therefore, the photocatalysts can be activated under the visible light range. In addition, they comprise only pure anatase crystallization phase, and since the crystallized particles are small in size, the efficiency and self-cleaning effect of the photocatalysts are very high.
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Choi Won-Kook
Jung Yeon-Sik
Kang Dong-Heon
Lee Kyung-Ju
Darby & Darby P.C.
Hailey Patricia L
Korea Institute of Science and Technology
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