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Modified silicon dioxide nanoparticles, and preparation method and applications thereof

A technology of silica and nanoparticles, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of low grade, achieve stable performance, high adsorption rate, and easy synthesis Effect

Active Publication Date: 2017-05-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Palladium in nature is usually associated with other elements, and the grade is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The modified silica nanoparticles have a structural formula of:

[0026] , where For nano-silica particles.

[0027] The preparation method of the modified silicon dioxide nanoparticles, its specific steps are as follows:

[0028] (1) First, mix nano-silica particles and 3-chloropropyltriethoxysilane evenly according to the liquid-solid ratio of 1.6:1ml / g, and then according to the liquid-solid ratio of absolute ethanol solution to nano-silica particles: 16: 1ml / g was added to the absolute ethanol solution, refluxed at 65°C for 42 hours, and then centrifuged to remove the solid matter, washed with absolute ethanol, centrifuged, dried in vacuum, and the obtained product was labeled as COTS-SNPs;

[0029] (2) Add the COTS-SNPs obtained in step (1) into the 4,4-bipyridine solution according to the liquid-solid ratio of 20:1ml / g, and then add vinyl chloride, toluene and CuCl in sequence, wherein vinyl chloride and COTS- The liquid-solid ratio of SNPs is 2:1ml / g, the l...

Embodiment 2

[0034] The modified silica nanoparticles have a structural formula of:

[0035] , where For nano-silica particles.

[0036] The preparation method of the modified silicon dioxide nanoparticles, its concrete steps are as follows:

[0037] (1) First, mix the nano-silica particles and 3-chloropropyltriethoxysilane evenly according to the liquid-solid ratio of 1.7:1ml / g, and then according to the liquid-solid ratio of the absolute ethanol solution to the nano-silica particles as 17: 1ml / g was added to the absolute ethanol solution, refluxed at 70°C for 48 hours, then centrifuged to remove the solid matter, washed with absolute ethanol, centrifuged, dried in vacuum, and the obtained product was labeled as COTS-SNPs;

[0038] (2) Add the COTS-SNPs obtained in step (1) into the 4,4-bipyridine solution according to the liquid-solid ratio of 25:1ml / g, and then add vinyl chloride, toluene and CuCl in sequence, wherein vinyl chloride and COTS- The liquid-solid ratio of SNPs is 2.5:...

Embodiment 3

[0043] The modified silica nanoparticles have a structural formula of:

[0044] , where For nano-silica particles.

[0045] The preparation method of the modified silicon dioxide nanoparticles, its specific steps are as follows:

[0046] (1) First, mix nano-silica particles and 3-chloropropyltriethoxysilane evenly according to the liquid-solid ratio of 1.8:1ml / g, and then according to the liquid-solid ratio of absolute ethanol solution to nano-silica particles 18: 1ml / g was added to the absolute ethanol solution, refluxed at 80°C for 54 hours, and then centrifuged to remove the solid matter, washed with absolute ethanol, centrifuged, dried in vacuum, and the obtained product was labeled as COTS-SNPs;

[0047] (2) Add the COTS-SNPs obtained in step (1) into the 4,4-bipyridine solution according to the liquid-solid ratio of 30:1ml / g, and then add vinyl chloride, toluene and CuCl in sequence, wherein vinyl chloride and COTS- The liquid-solid ratio of SNPs is 3:1ml / g, the liqu...

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PUM

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Abstract

The invention relates to modified silicon dioxide nanoparticles, and a preparation method and applications thereof, and belongs to the technical field of nano material preparation. The preparation method comprises following steps: firstly, nano silicon dioxide particles and 3-chloropropyltriethoxysilane are added into an absolute ethyl alcohol solution, reflux reaction is carried out, and an obtained solid substance 1 is marked as COTS-SNPs; the COTS-SNPs is added into a 4,4-bipyridine solution, vinyl chloride, methylbenzene, and CuCl are added successively, reflux reaction is carried out, and an obtained solid substance 2 is marked as VC-SNPs; the obtained VC-SNPs is added into an absolute ethyl alcohol solution, triethylamine and 1-methylimidazole are added, reflux reaction is carried out, and an obtained solid substance 3, which is the modified silicon dioxide nanoparticles, is collected, and is marked as MDZ-SNPs. The obtained modified silicon dioxide nanoparticles can be taken as an adsorbent to absorbing palladium ions in solution, are cheap, are convenient to synthesis, can be easily separated with aqueous solution, possesses high adsorptivity, and can be recycled.

Description

technical field [0001] The invention relates to a modified silicon dioxide nano particle, a preparation method and an application, and belongs to the technical field of nano material preparation. Background technique [0002] Palladium is a platinum group metal that can be used in electroplating, catalysts, dental alloys, brazing alloys and various contact materials. It has unique physical and chemical properties and is widely used in chemical catalysis, aerospace, microelectronics technology, exhaust gas purification It plays a key and central role in cutting-edge science and modern industries such as petrochemical, electrical and electronic, environmental protection, biopharmaceuticals, and national defense. Palladium in nature is usually associated with other elements, and the grade is low. With the increasing importance of environmental protection and the in-depth development and application of catalysts, the demand for metal palladium is growing rapidly. In the face o...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30
CPCB01J20/103B01J20/22B01J20/28016
Inventor 王仕兴付立康彭金辉张利波张耕玮
Owner KUNMING UNIV OF SCI & TECH
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