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Prepn process of nanometer composite silver carrying hydroxyapatite/titania disinfectant

A technology of silver-loaded hydroxyapatite and nano-titanium dioxide, which is applied in the field of preparation of nano-material technology, can solve the problems of cumbersome procedures and high equipment requirements, and achieve the effects of simple process operation, simple equipment, and uniform particle size

Inactive Publication Date: 2006-03-01
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"However, this method needs to disperse nano-titanium dioxide in a specially designed mixing reactor, which requires high equipment requirements and cumbersome procedures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] At 1.0mol / L Ca(NO 3 ) 2 In 500mL aqueous solution, add 1.0mol / l AgNO 3 500ml. Mix both well. Another 1.0mol / L (NH 4 ) 2 HPO 4 300mL aqueous solution, add 100ml 20% ammonia water to (NH 4 ) 2 HPO 4 solution, after mixing evenly, dilute the solution to 500ml.

[0015] Add the diammonium hydrogen phosphate solution dropwise into the mixed solution of silver and calcium nitrate, keep stirring, control the temperature of the solution at 80°C, and age for 10 hours. After filtering and washing with water several times, the obtained filter cake was dried in an oven at 120° C. for 8 hours to obtain silver-loaded hydroxyapatite. TiCl at 1.0mol / L 4 In 500mL aqueous solution, add 25mL of 20% ammonia water dropwise, add polycarboxylic acid, the ratio is [polycarboxylic acid] / [TiCl 4 ]=2.5:1, to obtain a light blue colloid solution, add silver-loaded hydroxyapatite, fully mix to make it evenly dispersed in the colloid solution, hydrolyze at 95°C for 2 hours, obtain a whit...

Embodiment 2

[0018] At 1.0mol / L Ca(NO 3 ) 2 In 500mL aqueous solution, add 1.0mol / l AgNO 3 500ml. Mix both well. Another 1.0mol / L (NH 4 ) 2 HPO 4 300mL aqueous solution, add 100ml 20% ammonia water to (NH 4 ) 2 HPO 4 solution, after mixing evenly, dilute the solution to 500ml.

[0019] Add the diammonium hydrogen phosphate solution dropwise to the silver and calcium nitrate mixed solution, keep stirring, control the solution temperature to 80°C, and age for 20 hours. After filtering and washing with water several times, the obtained filter cake was dried in an oven at 120° C. for 8 hours to obtain silver-loaded hydroxyapatite. TiCl at 1.0mol / L 4 In 400mL aqueous solution, add 20% ammonia water 25mL dropwise, add polycarboxylic acid, the ratio is [polycarboxylic acid] / [TiCl 4 ]=2.5:1, to obtain a light blue colloid solution, add silver-loaded hydroxyapatite, mix well to make it evenly dispersed in the colloid solution, hydrolyze it at 80°C for 2 hours, obtain a white suspension,...

Embodiment 3

[0022] In 500mL of 1.0mol / L Ca(NO3)2 aqueous solution, add 1.0mol / l AgNO 3 500ml. Mix both well. Another 1.0mol / L (NH 4 ) 2 HPO 4 300mL aqueous solution, add 100ml 20% ammonia water to (NH 4 ) 2 HPO 4 solution, after mixing evenly, dilute the solution to 500ml.

[0023] Add the diammonium hydrogen phosphate solution dropwise to the mixed solution of silver and calcium nitrate, keep stirring, control the temperature of the solution at 80°C, and age for 18 hours. After filtering and washing with water several times, the obtained filter cake was dried in an oven at 120° C. for 8 hours to obtain silver-loaded hydroxyapatite. TiCl at 1.0mol / L 4 In 300mL aqueous solution, add 25mL of 20% ammonia water dropwise, add polycarboxylic acid, the ratio is [polycarboxylic acid] / [TiCl 4]=2.5:1, to obtain a light blue colloid solution, add silver-loaded hydroxyapatite, fully mix to make it evenly dispersed in the colloid solution, hydrolyze at 70°C for 2 hours, obtain a white suspen...

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Abstract

The nanometer composite silver carrying hydroxyapatite / titania disinfectant is prepared with the inorganic salt of Ti, Ag, Ca and ammonium as material and through liquid phase co-precipitation process to prepare silver carrying hydroxyapatite, dispersing the silver carrying hydroxyapatite inside sol obtained via hydrolyzing inorganic salt of Ti, and subsequent heat treatment. The preparation process may be completed in improved common reactor and thermostatic equipment and is simple and practical. The nanometer composite silver carrying hydroxyapatite / titania disinfectant has lasting disinfectant effect, and is expected to be applied in purifying air, treating water and other fields.

Description

technical field [0001] The invention relates to a preparation method in the technical field of nanomaterials, in particular to a preparation method of a nanocomposite silver-loaded hydroxyapatite / titanium dioxide disinfection material. Background technique [0002] Hydroxyapatite Ca 10 (PO 4 ) 6 (OH) 2 It is a traditional bioceramic material. Due to the hydroxyl group in the structure of the material, it has a strong binding force with certain organic molecules, such as protein molecules, and has a strong capture effect on bacteria, viruses and other microorganisms. ; Hydroxyapatite also has a photocatalytic function, which can kill a variety of bacteria under light conditions. At the same time, metal silver is compounded on the surface of hydroxyapatite material to prepare silver-containing hydroxyapatite. Once silver ions come into contact with bacteria, they will strongly destroy some enzymes in the bacteria body, making the enzymes that bacteria depend on for surviva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/26
Inventor 刘河洲张凯常程康胡文彬吴人洁
Owner SHANGHAI JIAO TONG UNIV