Method of synthesizing anatase TiO2 nanosheets

Patent metadata

Field	Value
Publication number	US-9663382-B2
Application number	US-201213627259-A
Country	US
Kind code	B2
Filing date	Sep 26, 2012
Priority date	Sep 26, 2011
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A method of synthesizing anatase TiO 2 nanosheets, the method comprising the steps of: (a) mixing a titanium complex with an ethanolamine derivative; (b) adding water to form a mixture; and (c) heating the mixture at a temperature ranging from about 150° C. to about 200° C. to obtain anatase TiO 2 nanosheets having O-terminated {100} facets.

First claim

The invention claimed is:

1. A method of synthesizing anatase TiO 2 nanosheets, the method comprising the steps of:
(a) mixing a titanium complex with an ethanolamine derivative;
(b) adding sufficient water to completely hydrolyze the titanium complex to form a mixture, the mixture comprising Ti(OH) 4 ; and
(c) heating the mixture at only one temperature ranging from about 150° C. to about 200° C. to obtain anatase TiO 2 nanosheets having O-terminated {100} facets.

2. The method of claim 1 , further comprising
(d) heating the anatase TiO 2 nanosheets having O-terminated {100} facets at a temperature ranging from about 400° C. to about 600° C. to obtain anatase TiO 2 nanosheets having activated {100} facets.

3. The method of claim 1 , further comprising, after step (c), washing with ethanol, centrifuging and drying the anatase TiO 2 nanosheets having O-terminated {100} facets at a temperature ranging from room temperature to about 200° C.

4. The method of claim 1 , wherein the titanium complex is a titanium (IV) complex.

5. A method of fabricating a dye-sensitized solar cell, the method comprising:
(a) mixing a titanium complex with an ethanolamine derivative;
(b) adding sufficient water to completely hydrolyze the titanium complex to form a mixture, the mixture comprising Ti(OH) 4 ;
(c) heating the mixture at only one temperature ranging from about 150° C. to about 200° C. to obtain anatase TiO 2 nanosheets having O-terminated {100} facets;
(d) heating the anatase TiO 2 nanosheets having O-terminated {100} facets at a temperature ranging from about 400° C. to about 600° C. to obtain anatase TiO 2 nanosheets having activated {100} facets; and
(e) soaking the anatase TiO 2 nanosheets having activated {100} facets in a N719 industry standard dye solution to obtain anatase TiO 2 nanosheets having O-(dye)-terminated {100} facets.

6. The method of claim 5 , further comprising, immediately after step (c) and before step (d), washing with ethanol, centrifuging and drying the anatase TiO 2 nanosheets having O-terminated {100} facets at a temperature ranging from room temperature to about 200° C.

7. The method of claim 5 , wherein the titanium complex is a titanium (IV) complex.

Assignees

• Univ Nanyang Tech

Inventors

• Liu Jiehua
• Liu Xue-Wei
• Wei Xiangfeng

Classifications

• C07F7/003

  without C-Metal linkages · CPC title

• C01P2004/03

  obtained by SEM · CPC title

• C01P2006/17

  Pore diameter distribution · CPC title

• C07F15/0046

  Ruthenium compounds · CPC title

• C01P2004/24

  Nanoplates, i.e. plate-like particles with a thickness from 1-100 nanometer · CPC title