Synthesis technique of {001}-surface-exposed visible light titanium dioxide nanosheet with oxygen vacancy

A technology of titanium dioxide and synthesis process, which is applied in the field of synthesis process of visible light titanium dioxide nanosheets, which can solve the problems of limiting the application of photocatalysts and complicated processes, and achieve the effects of simple preparation process, good crystallinity, and strong controllability of reaction conditions
CN102631907AInactive Publication Date: 2012-08-15SHANGHAI NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI NORMAL UNIVERSITY
Publication Date
2012-08-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a synthesis technique of a {001}-surface-exposed visible light titanium dioxide nanosheet with oxygen vacancy. The raw material proportion, aging time and temperature and supercritical extraction conditions are controlled to obtain a titanium dioxide nanosheet with favorable degree of crystallization and obvious single-crystal diffraction, wherein the particle sizes are uniform (50-200nm), and the thickness of the nanosheet is 10-20nm. The invention has the advantages of simple preparation process, strong reaction condition controllability and short synthesis time, does not need to introduce other composite semiconductors or dope visible-light-responsive elements in the synthesis process, and does not need treatment after the reaction; and the prepared product has potential application value in the fields of environmental treatment, hydrogen generation by photolyzing water, dye-sensitized solar cells, photoelectric materials and the like.
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Description

technical field

[0001] The invention relates to the field of photocatalysts, in particular to a synthesis process of visible-light titanium dioxide nanosheets with oxygen defects exposed on {001} planes. Background technique

[0002] TiO 2 is an important semiconductor photocatalyst, TiO 2 Because of its green, non-toxic, high catalytic activity, good chemical stability, cheap and easy to obtain, it has become a typical photocatalyst. The photocatalytic performance of titanium dioxide mainly depends on the crystal phase, crystallinity, specific surface area, structure and exposed crystal facets. Studies have shown that the average surface energy of each crystal face of anatase titanium dioxide crystal is: 0.90J m -2 {001}>0.53J·m -2 {100}>0.44J·m -2 {101}. Therefore, in the anatase titanium dioxide crystal, the reactivity of the {001} high-energy crystal plane is higher than that of the {101} crystal plane, and the currently synthesized titanium dioxide is mainly...

Claims

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