Nano photocatalytic sol and application thereof

Abstract

The present invention relates to a nano-sized photocatalytic sol and application thereof. The invention utilizes spherical nano-photocatalyst and non-spherical photocatalytic sol for coating a photocatalyst layer on a substrate. Because of the stereo, interlaced and composite structure between spherical photocatalyst and non-spherical photocatalyst, a hard and well adhesion coated layer of photocatalyst with good photocatalytic activity can be obtained without using binder.

Description

Claims

1. A nano-photocatalytic sol, comprising: at least a substantially spherical nano-photocatalyst; anda non-spherical nano-photocatalytic sol;wherein the non-spherical nano-photocatalytic sol contains non-spherical nano-photocatalyst and partially non-crystalline photocatalytic material.

2. The nano-photocatalytic sol according to claim 1, wherein the mass ratio of spherical nano-photocatalyst to non-spherical nano-photocatalyst ranges from 1:3 to 3:1.

3. The nano-photocatalytic sol according to claim 1, wherein the spherical nano-photocatalyst is titanium dioxide, cadmium selenide, zinc oxide or tin dioxide.

4. The nano-photocatalytic sol according to claim 1, wherein the non-spherical nano-photocatalyst is titanium dioxide, zinc oxide or tin dioxide.

5. The nano-photocatalytic sol according to claim 1, wherein the partially non-crystalline photocatalytic material is titanium dioxide, cadmium selenide, zinc oxide or tin dioxide.

6. The nano-photocatalytic sol according to claim 1, wherein the nano-photocatalytic sol is used for photocatalytic coating.

7. A nano-photocatalytic coating sol, comprising: at least a substantially spherical nano-photocatalyst;a non-spherical nano-photocatalyst; anda partially non-crystalline photocatalytic material.

8. The nano-photocatalytic coating sol according to claim 7, wherein the spherical nano-photocatalyst is titanium dioxide, cadmium selenide, zinc oxide or tin dioxide.

9. The nano-photocatalytic coating sol according to claim 7, wherein the non-spherical nano-photocatalyst is titanium dioxide, zinc oxide or tin dioxide.

10. The nano-photocatalytic coating sol according to claim 7, wherein the partially non-crystalline photocatalytic material is titanium dioxide, cadmium selenide, zinc oxide or tin dioxide.

11. A nano-photocatalytic sol, comprising: at least a substantially spherical nano-photocatalyst;a non-spherical nano-photocatalyst; anda partially non-crystalline photocatalytic material.

12. The nano-photocatalytic sol according to claim 11, wherein the nano-photocatalytic sol is made by mixing said substantially spherical nano-photocatalyst and a non-spherical nano-photocatalytic sol, the non-spherical nano-photocatalytic sol comprises: a non-spherical nano-photocatalyst; anda partially non-crystalline photocatalytic material.

13. The nano-photocatalytic sol according to claim 12, wherein the spherical nano-photocatalyst is the form of powder or sol.

14. The nano-photocatalytic sol according to claim 12, wherein the spherical nano-photocatalyst is in the form of sol.

15. The nano-photocatalytic sol according to claim 11, wherein the spherical nano-photocatalyst is titanium dioxide, cadmium selenide, zinc oxide or tin dioxide.

16. The nano-photocatalytic sol according to claim 11, wherein the non-spherical nano-photocatalyst is titanium dioxide, zinc oxide or tin dioxide.

17. The nano-photocatalytic sol according to claim 11, wherein the partially non-crystalline photocatalytic material is titanium dioxide, cadmium selenide, zinc oxide or tin dioxide.

18. A substrate with a nano-photocatalytic film on its surface, wherein the nano-photocatalytic film comprises at least a spherical nano-photocatalyst, a non-spherical nano-photocatalyst and a partially non-crystalline photocatalytic material.

19. The substrate according to claim 18, wherein the spherical nano-photocatalyst is titanium dioxide, cadmium selenide, zinc oxide or tin dioxide.

20. The substrate according to claim 18, wherein the non-spherical nano-photocatalyst is titanium dioxide, zinc oxide or tin dioxide.

21. The substrate according to claim 18, wherein the partially non-crystalline photocatalytic material is titanium dioxide, cadmium selenide, zinc oxide or tin dioxide.