Method for one step synthesizing and immobilizing crystalline TiO 2 nano-particles simultaneously on polymer support and use of the same

• US 8,349,141 B2
• Filed: 03/17/2010
• Issued: 01/08/2013
• Est. Priority Date: 10/19/2009
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Chang, Min-Chao, Shao, Hsin, Huang, Meng-Shun, Chung, Li-Ching, Yang, Arnold Chang-Mou, Liu, Po-I, Liu, Yen-Hui
• Primary Examiner(s): Hendricks, Keith
• Assistant Examiner(s): Raphael, Colleen M
• Application Number:
  US12/661,508
• Publication Number:
  US 20110089018A1
• Time in Patent Office: 1,028 Days
• Field of Search: 204/157.46, 204/157.51, 204/157.43, 204/157.5
• US Class Current: 204/157.43
• CPC Class Codes: C01G 23/047 Titanium dioxide
• CPC Class Codes: C01P 2002/72 by d-values or two theta-values, e.g. as X-ray diagram
• CPC Class Codes: C01P 2004/03 obtained by SEM
• CPC Class Codes: Y02P 20/54 using solvents, e.g. supercritical solvents or ionic liquids

Abstract

A method for one step synthesizing and immobilzing crystalline titanium dioxide (TiO₂) nano-particles simultaneously on a polymer support and a use thereof are provided. The method includes adding TiO₂ precursor, water, alcohol and an ionic liquid in a sol-gel reaction under microwave irradiation, so that a plurality of TiO₂ crystalline nano-particles are synthesized and immobilized on the polymer support simultaneously.

Claims

1. A method of one step synthesizing and immobilizing crystalline titanium dioxide (TiO₂) nano-particles simultaneously on a polymer support, comprising:

providing a polymer support;

and synthesizing a plurality of crystalline TiO2 nano-particles simultaneously with immobilizing the crystalline TiO2 nano-particles on a surface of the polymer support by causing a sol-gel reaction on the surface of the polymer support under a microwave irradiation, wherein a TiO2 precursor, water, an alcohol, and an ionic liquid are applied in the sol-gel reaction during the synthesizing.

2. The method as claimed in claim 1, wherein the ionic liquid comprises a conventional ionic liquid or a deep eutectic mixture solvent type ionic liquid.

3. The method as claimed in claim 2, wherein a cation of the conventional ionic liquid comprises 1-alkyl-3-methylimidazolium, [C_nMIM]⁺, wherein n represents a number of linear alkyl carbons, N-alkylpyridinium, [C_nPY]⁺, wherein n represents a number of linear alkyl carbons, tetraalkylammonium, or tetraalkylphosphonium.

4. The method as claimed in claim 2, wherein an anion of the conventional ionic liquid comprises hexafluorophosphate, tetrafluoroborate, trifluoromethylsulfonate, (bis[(trifluoromethyl)sulfonyl]amide, trifluoroethanoate, ethanoate, or a halide.

5. The method as claimed in claim 4, wherein the halide comprises Br⁻

, Cl⁻

, or I⁻

.

6. The method as claimed in claim 2, wherein the deep eutectic mixture solvent type ionic liquid comprises an eutectic mixture having a low melting point being formed by quaternary ammonium salt and hydrogen donors.

7. The method as claimed in claim 6, wherein the deep eutectic mixture solvent type ionic liquid having the low melting point is formed by an oxalic acid and a choline cholide.

8. The method as claimed in claim 1, wherein the TiO₂ precursor comprises titanium alkoxide or a titanium compound capable of undergoing hydrolysis and condensation reaction with water.

9. The method as claimed in claim 8, wherein the titanium alkoxide comprises titanium ethoxide or titanium isopropoxide.

10. The method as claimed in claim 1, wherein the alcohol comprises an alcohol having a carbon number of 1-10.

11. The method as claimed in claim 1, wherein the alcohol comprises a primary alcohol, a secondary alcohol, or a tertiary alcohol.

12. The method as claimed in claim 11, wherein the alcohol comprises ethanol, isopropyl alcohol, or tert-butyl alcohol.

13. The method as claimed in claim 1, wherein the alcohol comprises diols or triols.

14. The method as claimed in claim 13, wherein the alcohol comprises ethylene glycol or glycerol.

15. The method as claimed in claim 1, wherein a molar ratio of compounds used in the reaction is:

TiO₂;

water;

alcohol;

ionic liquid =0.5-20;

0.5-200;

0.5-100;

0.5-200;

0.5-100;

0.5-200.

16. The method as claimed in claim 1, wherein the frequency of the microwave irradiation ranges from 0.3 GHz to 300 GHz.

17. The method as claimed in claim 1, wherein the reaction temperature under the microwave irradiation ranges from 40°

C. to 200°

C.

18. The method as claimed in claim 1, wherein a material of the polymer support comprises a thermoplastic polymer material.

19. The method as claimed in claim 18, wherein the material of the polymer support comprises polymethyl methacrylate, polycarbonate, polyester, or polyamide.

20. The method as claimed in claim 1, wherein a type of the polymer support comprises a shape of a slab, a plate, a sheet, or a fiber.