Photocatalyst, method for manufacturing the same, and molded articles

Abstract

The present invention provides a photocatalyst which is excellent in absorbability to organic materials and the like and is inexpensive, a method for manufacturing the photocatalyst at low cost with simple procedures, and molded articles using the photocatalyst. The photocatalyst of the present invention contains at least a porous body containing a calcium hydroxy apatite having photocatalytic activity. The method for manufacturing a photocatalyst of the present invention is a method for manufacturing the photocatalyst of the present invention, and includes doping a metal atom necessary for obtaining photocatalytic activity in an apatite contained in a bone. The molded articles are formed by using the photocatalyst of the present invention.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a view schematically showing an example of a manufacturing process of the method for manufacturing an photocatalyst of the present invention.

FIG. 2 is a graph showing evaluation results on photocatalytic activity of the photocatalyst of the present invention and a commercially available photocatalyst.

FIG. 3 is a graph showing evaluation results on absorbability to the photocatalyst of the present invention and a commercially available photocatalyst.

Claims

1. A photocatalyst comprising: a porous body which comprises a calcium hydroxy apatite having photocatalytic activity.

2. The photocatalyst according to claim 1, wherein the porous body is a bone.

3. The photocatalyst according to claim 1, wherein the calcium hydroxy apatite is a metal atom necessary for obtaining photocatalytic activity.

4. The photocatalyst according to claim 3, wherein the metal atom necessary for obtaining photocatalytic activity is at least one selected from titanium (Ti), zinc (Zn), manganese (Mn), tin (Sn), indium (In), and iron (Fe).

5. The photocatalyst according to claim 4, wherein the metal atom necessary for obtaining photocatalytic activity is titanium (Ti).

6. A method for manufacturing a photocatalyst comprising: doping a metal atom necessary for obtaining photocatalytic activity in an apatite-containing bone, wherein the photocatalyst comprises at least a porous body which comprises a calcium hydroxy apatite having photocatalytic activity.

7. The method for manufacturing a photocatalyst according to claim 6, wherein the metal atom necessary for obtaining photocatalytic activity is at least one selected from titanium (Ti), zinc (Zn), manganese (Mn), tin (Sn), indium (In), and iron (Fe).

8. The method for manufacturing a photocatalyst according to claim 7, wherein the metal atom necessary for obtaining photocatalytic activity is titanium (Ti).

9. The method for manufacturing a photocatalyst according to claim 6, wherein the doping is performed by making at least a part of metal atoms in the apatite substituted by the metal atom necessary for obtaining photocatalytic activity.

10. The method for manufacturing a photocatalyst according to claim 9, wherein the substitution by the metal atom necessary for obtaining photocatalytic activity is performed by ion exchange.

11. The method for manufacturing a photocatalyst according to claim 6, wherein the metal atom necessary for obtaining photocatalytic activity in the apatite-containing bone is doped by dipping the apatite-containing bone in a water solution which comprises the metal atom necessary for obtaining photocatalytic activity.

12. The method for manufacturing a photocatalyst according to claim 6, further comprising heating the apatite-containing bone at 300° C. or more after the doping.

13. A molded article formed by using a photocatalyst, wherein the photocatalyst comprises at least a porous body which comprises a calcium hydroxy apatite having photocatalytic activity.