Silicon dioxide and titanium dioxide composite material containing carbon dots and preparation method of material

A composite material, titanium dioxide technology, applied in the field of carbon dot composite materials, can solve the problems of carbon dot materials and their composite materials not being obvious, and achieve the effect of visual operation, high efficiency and good adsorption performance

Inactive Publication Date: 2017-08-11
DONGGUAN JIAQIAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the above prior art, the composite materials of carbon dot materials are mostly applied in the field of biological devices, and the application of carbon dot materials and their composite materials in the environment is not significant.

Method used

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  • Silicon dioxide and titanium dioxide composite material containing carbon dots and preparation method of material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mix 0.96 g of citric acid, 500 μl of ethylenediamine, and 10 mL of deionized water, add 30 mg of mesoporous silica and 50 mg of sodium nitrate, and ultrasonically disperse to obtain a white suspension.

[0027] (2) Put the suspension in the H-type reactor, adjust the argon gas flow to 60mL / min, and place the two discharge electrodes directly above the H-type reactor, the cathode is a platinum wire electrode, and the anode is an argon gas tube with an inner diameter of 180 μm , adjust the output current of the constant current power supply to 10mA, and the voltage to 2900V, conduct atmospheric pressure micro-plasma discharge treatment, keep the discharge current stable for 10min, centrifuge the suspension after the discharge, and wash the solid three times with deionized water After that, it was washed twice with ethanol, and dried in vacuum at 80°C to obtain a carbon dot / mesoporous silica composite material.

[0028] (3) Add 10ml tetrabutyl titanate dropwise to 30ml...

Embodiment 2

[0030] (1) Mix 0.96 g of citric acid, 500 μl of ethylenediamine, and 10 mL of deionized water, add 30 mg of mesoporous silica and 50 mg of sodium nitrate, and ultrasonically disperse to obtain a white suspension.

[0031] (2) Put the suspension in the H-type reactor, adjust the argon gas flow to 60mL / min, and place the two discharge electrodes directly above the H-type reactor, the cathode is a platinum wire electrode, and the anode is an argon gas tube with an inner diameter of 180 μm , adjust the output current of the constant current power supply to 2mA, the voltage to 2900V, carry out normal pressure micro-plasma discharge treatment, keep the discharge current stable for 40min, after the discharge, the suspension is separated by centrifugation, and the solid is first washed 4 times with deionized water After that, it was washed with ethanol three times, and dried in vacuum at 80°C to obtain a carbon dot / mesoporous silica composite material.

[0032] (3) Add 10ml tetrabutyl...

Embodiment 3

[0034] (1) Mix 0.96 g of citric acid, 500 μl of ethylenediamine, and 10 mL of deionized water, add 30 mg of mesoporous silica and 50 mg of sodium nitrate, and ultrasonically disperse to obtain a white suspension.

[0035] (2) Put the suspension in the H-type reactor, adjust the argon gas flow to 60mL / min, and place the two discharge electrodes directly above the H-type reactor, the cathode is a platinum wire electrode, and the anode is an argon gas tube with an inner diameter of 180 μm , adjust the output current of the constant current power supply to 15mA, the voltage to 2900V, carry out the normal pressure micro-plasma discharge treatment, keep the discharge current stable for 10min, after the discharge, the suspension is separated by centrifugation, and the solid is first washed 3 times with deionized water After that, it was washed with ethanol three times, and dried in vacuum at 80°C to obtain a carbon dot / mesoporous silica composite material.

[0036] (3) Add 10ml tetra...

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Abstract

The invention provides a silicon dioxide and titanium dioxide composite material containing carbon dots and a preparation method of the material. The silicon dioxide and titanium dioxide composite material containing the carbon dots comprises a carbon dot and mesoporous silica composite material of a channel structure and nano titanium dioxide particles attached to the surface of the composite material. The preparation method includes the steps that mesoporous silica and a solution containing citric acid and ethylenediamine are mixed and subjected to ultrasonic dispersion to obtain turbid liquid, the turbid liquid is subjected to normal-pressure microplasma discharge treatment, then the product is subjected to centrifugal separation, solid washing and vacuum drying, and the carbon dot and mesoporous silica composite material is obtained; a titanium precursor solution is mixed with the carbon dot and mesoporous silica composite material, the mixture is dropwise added into an ethyl alcohol solution containing glacial acetic acid, stirring continues, the product is dried, and the silicon dioxide and titanium dioxide composite material containing the carbon dots are obtained. The preparation method is simple, high in efficiency and low in energy consumption, and the prepared composite material is fluorescent, can be used for the field of heavy metal ion adsorption catalysis, and has a good adsorption catalysis effect especially on uranyl ions.

Description

technical field [0001] The invention belongs to the technical field of carbon dot composite materials, in particular to a silicon dioxide / titania composite material containing carbon dots and a preparation method thereof. Background technique [0002] Carbon is one of the most closely related and important elements in nature. With the rapid development of science and technology, the structure of carbon materials has also entered the nanometer scale. By adjusting the size and surface chemical properties of carbon materials, new carbon nanomaterials mainly Available in the following forms: fullerenes, carbon nanotubes, carbon nanofibers, nanodiamonds, graphene, and carbon dots. [0003] Carbon dots are a new type of fluorescent carbon nanomaterials. Carbon dots refer to carbon particles that are smaller than 10nm in at least one dimension and have fluorescent properties. They can be aggregated dots, graphene quantum dots and carbon nanodots. Carbon dots have Small size, good ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/20B01J20/28B01J21/18C09K11/65C09K11/02C02F101/20
CPCB01J20/06B01J20/103B01J20/20B01J20/28007B01J21/18B01J23/002B01J35/004C02F1/281C02F2101/20C09K11/025C09K11/65
Inventor 王海燕
Owner DONGGUAN JIAQIAN NEW MATERIAL TECH CO LTD
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