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A kind of antibacterial metal ion/titanium-loaded hydroxyapatite nano photocatalyst and its preparation method

A technology of titanium-loaded hydroxyapatite and antibacterial metal ions, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., and can solve problems such as lack of quick-acting properties, reduced use concentration, and unsuitable for commercialization. , to avoid residual chloride ions, reduce the number of washings, and reduce the loss rate

Active Publication Date: 2019-04-26
姚 燕燕
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most representative nano-photocatalyst is titanium dioxide (TiO 2 ), however, TiO 2 It is a typical ultraviolet light-responsive photocatalyst, which can only use the ultraviolet light energy of about 380nm to carry out the catalytic reaction
The ultraviolet light in sunlight accounts for less than 5%, and TiO 2 Ineffective under artificial light sources other than UV lamps
Due to the different antibacterial advantages of various antibacterial metal ions on different microorganisms, although the hydroxyapatite material replaced by a single metal ion shows a certain antibacterial activity within a certain period of time, as a disinfectant, the activity lacks an instantaneous effect. "quick action", especially "the ability to inhibit mold is still lacking"
Moreover, the silver ion in the silver-loaded hydroxyapatite material is a precious metal, and it is easily oxidized and discolored. Therefore, it needs to be used in large quantities to improve the antibacterial activity, which is not only expensive, but also affects the appearance of the product due to discoloration, which is not suitable for commercialization
However, reducing the use concentration will lead to the low bactericidal function of the product

Method used

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  • A kind of antibacterial metal ion/titanium-loaded hydroxyapatite nano photocatalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The first step of preparation of antibacterial metal ion-supported artificial zeolite

[0035] (1) Raw material formula

[0036] a. Silver nitrate (AgNO 3 )

[0037] b. Copper nitrate [Cu(NO 3 ) 2 ]

[0038] c. Zinc nitrate [Zn(NO 3 ) 2 ·6H 2 O]

[0039] d. Artificial zeolite

[0040] e. Deionized water

[0041] (2) Processing flow

[0042] The preparation process is as follows:

[0043] a. Preparation of silver nitrate (AgNO 3 ) aqueous solution: AgNO 3 (1.7g, 0.01mol) was completely dissolved in 100ml of deionized water and placed in a dark place for later use;

[0044] b. Preparation of copper nitrate Cu (NO 3 ) 2 Aqueous solution: Cu(NO 3 ) 2 (75g, 0.4mol) was dissolved in 200ml of deionized water and placed in a dark place for later use;

[0045] c. Add 700ml of deionized water to the reaction kettle coated with PTFE on the inner wall, and put the AgNO that has been left standing for more than 1-2 hours 3 Aqueous solution and Cu(NO 3 ) 2 The a...

Embodiment 2

[0077] (1)Material

[0078] a. Antibacterial metal ionic liquid

[0079] b. Hydroxyapatite nanomaterials sold in the market

[0080] c. orthotitanate H 4 TiO 4 (Also available titanium dihydroxide Ti(OH) 2 , titanium trihydroxide H 3 TiO 3 , or a mixture of the three)

[0081] d. Nitric acid solution (2% concentration)

[0082] (2) Operation process

[0083] a. Antibacterial metal ionic liquid is prepared by the method described in Example 1;

[0084] b. The orthotitanate H 4 TiO 4 (2.32g, 0.024mol) was dissolved in 100ml of 2% aqueous nitric acid to prepare H 4 TiO 4 / nitric acid solution;

[0085] c. Add hydroxyapatite nanomaterials purchased from the market directly into H 4 TiO 4 In the / nitric acid solution, the molar ratio of Ti / (Ca+Ti) was controlled to be 0.2. After stirring at room temperature for 30 minutes, ultrasonically treated for 30 minutes, then aged for 24 hours, the solid was separated, dried, and ground to obtain titanium-loaded hydroxyapati...

Embodiment 3

[0088] (1)Material

[0089] a. Antibacterial metal ionic liquid

[0090] b. [-OTiO-] aqueous sol

[0091] c. Calcium nitrate [Ca(NO 3 ) 2 ], diamine hydrogen phosphate [(NH 4 )H 2 PO 4 ],ammonia

[0092] (2) Operation process

[0093] a. Antibacterial metal ionic liquid is prepared by the method described in Example 1;

[0094] b. The [-OTiO-] aqueous sol was prepared by the method described in Example 1;

[0095] c. Mix the prepared antibacterial metal ionic liquid with [-OTiO-] aqueous sol, the molar ratio of Metal / Ti is 1 / 5, and stir at 40°C for nearly 4-6 hours to prepare metal ion-doped titanium dioxide aqueous solution sol;

[0096] d. Add calcium nitrate [Ca(NO 3 ) 2 ], the molar ratio of controlling Ti / (Ca+Ti) is 0.26. (NH 4 )H 2 PO 4 Slowly added dropwise to "metal antibacterial ion / [-OTiO-] / Ca(NO 3 ) 2 In "mixed solution", the molar ratio of control (Ca+Ti) / P is 1.67-1.7;

[0097] e. Use ammonia water to adjust the pH value of the solution to a weak ...

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Abstract

The present invention discloses an antibacterial metal ion / titanium-supporting hydroxyapatite nanometer photocatalyst, which is a hydroxyapatite nanometer material, wherein partial Ca<2+> is substituted with antibacterial metal ions and Ti<4+>, the antibacterial metal ions comprise Cu<2+>, Zn<2+> and Ag<+>, and during the preparation, the original feeding molar ratio of various metal ions is that n(Ti+metal) / n(Ca+Ti+metal) is 0.1-0.5, and the "metal" refers to the antibacterial metal ions. According to the present invention, the nanometer material has functions of rapid sterilization, long-term sterilization function and high mildew ability, and can instantly play super-strong sterilization effect in the absence of illumination, wherein the sterilization rate within 1 min can achieve more than 96%, and the sterilization rate within 3-4 min can achieve more than 99%; and after visible light irradiation for 30 min, more than 80% of formaldehyde gas can be removed.

Description

technical field [0001] The invention relates to the technical field of photocatalysis technology and antibacterial metal free ion concentration, in particular to an antibacterial metal ion / titanium-loaded hydroxyapatite nano-photocatalyst. Background technique [0002] Nano-photocatalysts, as a kind of nano-bionic technology, are widely used in many frontier fields such as environmental purification, self-cleaning materials, advanced new energy, cancer medical treatment, and high-efficiency antibacterial. The most representative nano-photocatalyst is titanium dioxide (TiO 2 ), however, TiO 2 It is a typical ultraviolet light-responsive photocatalyst, which can only use the ultraviolet light energy of about 380nm to carry out the catalytic reaction. The ultraviolet light in sunlight accounts for less than 5%, and TiO 2 It is even less effective under artificial light sources other than UV lamps. Therefore, TiO 2 The popularity of the application has been greatly restrict...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/18A01N25/08A01N59/20A01N59/16A01P1/00A01P3/00
CPCA01N25/08A01N59/16A01N59/20B01J27/1806B01J27/1817B01J35/004B01J37/033B01J37/036B01J37/30A01N2300/00
Inventor 姚燕燕
Owner 姚 燕燕
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