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Preparation method and application of carbon dot/mesoporous silica composite material

A technology of mesoporous silica and composite materials, which is applied in the direction of chemical instruments and methods, luminescent materials, alkali metal compounds, etc., can solve the problems of complex and cumbersome preparation methods, and achieve separation and enrichment, good pore structure, and adsorption good performance effect

Active Publication Date: 2017-05-17
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the complex and cumbersome preparation method of carbon dot / mesoporous silica composite material, the present invention provides a preparation method and application of carbon dot / mesoporous silica composite material, which is characterized in that the preparation method includes the following step:

Method used

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  • Preparation method and application of carbon dot/mesoporous silica composite material
  • Preparation method and application of carbon dot/mesoporous silica composite material
  • Preparation method and application of carbon dot/mesoporous silica composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Preparation of a carbon dot / mesoporous silica composite material: Rinse a 25mL beaker with deionized water, dry it for later use, weigh 0.960g of citric acid into the beaker, measure 500μL of ethylenediamine and pour it into beaker, and add 10mL deionized water, 30mg mesoporous silica and 50mg sodium nitrate into it, and ultrasonically disperse to obtain a white suspension; pour the solution into an H-type reaction vessel, place the reactor on the test bench, Adjust the argon gas flow to 60mL / min, the two discharge electrodes are directly above the H-type reactor, the cathode is a platinum wire electrode, the anode is an argon tube with an inner diameter of 180μm, and the output current of the constant current power supply is adjusted to 10mA, and the voltage is 2900V. After the experiment started, the cathode platinum wire electrode was immersed in the solution, and the anode argon gas tube was slowly lowered until the discharge started. At this time, a stopwatch was us...

Embodiment 2

[0027] Keep discharging stably and continue 20min, other conditions are identical with embodiment 1, the fluorescence spectrum of prepared carbon dot / mesoporous silica composite material is as follows image 3 It is shown that the composite material has good fluorescence properties.

Embodiment 3

[0029] Keep the discharge stable and continue for 30min, other conditions are the same as in Example 1, the fluorescence spectrum of the prepared carbon dot / mesoporous silica composite material is as follows image 3 It is shown that the composite material has good fluorescence properties.

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Abstract

The invention discloses a preparation method and application of a carbon dot / mesoporous silica composite material and belongs to the field of synthesis and application of fluorescent carbon nanomaterials and mesoporous composite materials. The method comprises the following steps: blending citric acid, ethanediamine, mesoporous silica and sodium nitrate into deionized water; carrying out ultrasonic dispersion and then putting in a reactor; carrying out normal pressure microplasma discharge processing; after discharging is ended, centrifugally separating, and washing and drying a solid to obtain the carbon dot / mesoporous silica composite material. The composite material is used for aspects of uranyl ion adsorption and adsorption process monitoring. The method has the advantages of quickness, simplicity and low energy consumption; the prepared carbon dot / mesoporous silica composite material has good fluorescent property and porous structure, and good adsorptive property to uranyl ions; in addition, the fluorescent property of the composite material is used for monitoring the adsorption process, and the visualization of the adsorption process is realized.

Description

technical field [0001] The invention belongs to the field of synthesis and application of fluorescent carbon nanomaterials and mesoporous composite materials, and specifically relates to a preparation method and application of a carbon dot / mesoporous silica composite material. Background technique [0002] With the rapid development of the economy, the problem of energy shortage is becoming more and more serious. The environmental problems caused by the combustion of traditional fossil energy have made my country's demand for clean and efficient low-carbon energy more and more intense. Among the many clean energy sources, the development of nuclear energy is particularly rapid, and the consumption of uranium, which is the main fuel of nuclear energy, will also increase year by year. In addition, in the mining and production process, the uranium-containing wastewater generated poses a threat to human health and the protection of the environment. Therefore, real-time monitor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C09K11/65G01N21/64G21F9/12
CPCB01J20/103B01J20/20B01J20/28011C09K11/65G01N21/64G21F9/12
Inventor 陆跃翔王哲魏国玉陈靖
Owner TSINGHUA UNIV
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