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Inorganic-organic composite nanoparticle as well as preparation method and application thereof

A technology of composite nanoparticles and silver nanoparticles, applied in the preparation of organic compounds, the preparation of hydroxyl compounds, organic chemistry, etc., can solve the problems of low utilization rate of light energy of catalysts, difficult recycling and reuse of catalysts, etc., and achieve good catalytic reaction effect. , Conducive to the control of performance, the effect of reducing waste of raw materials and environmental pollution

Pending Publication Date: 2020-11-24
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the catalyst for the reduction of carbon dioxide reaction in the prior art is difficult to recycle and reuse, and the catalyst has a low utilization rate of light energy

Method used

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  • Inorganic-organic composite nanoparticle as well as preparation method and application thereof

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preparation example Construction

[0028] In one or some embodiments of the present disclosure, a method for preparing inorganic-organic composite nanoparticles is provided, comprising the following steps: ultrasonically dispersing silver nanoparticles in a solvent, adding vinylbenzyl chloride, divinylbenzene, and benzyl peroxide acyl, the system was slowly heated to boiling state, kept boiling to distill off most of the solvent, centrifugally dispersed to obtain inorganic-organic composite nanoparticles, dried and set aside.

[0029] Preferably, the ultrasonic dispersion solvent is acetonitrile;

[0030] Preferably, the mass ratio of silver, vinylbenzyl chloride, divinylbenzene, and benzoyl peroxide is (30-50):(40-60):(40-60):1.

[0031] Preferably, the silver nano-ions are modified with MPS;

[0032] Preferably, the MPS modification method is as follows: add silver nitrate solution, slowly add sodium citrate solution under stirring, and heat in an oil bath for one hour. Afterwards, transfer to the normal te...

Embodiment 1

[0065] This embodiment provides a preparation method of inorganic-organic composite nanoparticles, comprising the following steps:

[0066] Take a 250ml one-necked flask, add 200ml of silver nitrate solution with a concentration of 1.5mmol·L-1, slowly add 8mL of 1% sodium citrate solution under stirring, and heat in an oil bath at 100°C for one hour. Afterwards, transfer to a normal temperature water bath and continue to stir for 6 hours to obtain a silver nanoparticle sol mixed solution.

[0067] Another 500ml single-necked round-bottomed flask was added, 100ml of the above-mentioned silver nanoparticle sol mixed solution and 300ml of absolute ethanol were added, stirred at room temperature for 5 minutes, then 10ml of ammonia was added, and 200mg of 3-(methacryloyloxy)propane was added under continuous stirring. Trimethoxysilane (MPS), stirred at room temperature for 48 hours, centrifuged to remove the supernatant and washed three times with ethanol to obtain MPS-modified Ag ...

Embodiment 2

[0070] This embodiment provides a method for photocatalytic reduction of carbon dioxide to generate methanol, comprising the following steps:

[0071] Take 40 mg of the core-shell inorganic-organic composite nanoparticles in Example 1 and ultrasonically disperse them in 10 ml of tetrahydrofuran, add 200 ul of bis(trimethylsilyl) potassium amide under stirring, and react with stirring at room temperature for 4 hours. Carbon dioxide was bubbled in until saturated, after which the reaction was continued to stir for two hours. Centrifuge to remove supernatant. Continue to disperse in 1ml of 1,4-dioxane, add 50ul of deionized water, 10mg of N,N,N',N'-tetramethylbenzidine (TMB), and irradiate with a 340nm mercury lamp for 8 hours , centrifuge to take the supernatant, and rectify to distill out methanol, the product of catalytic reduction of nitrogen dioxide.

[0072] Determination of methanol production in 0.5h was 20mg.

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Abstract

The invention relates to the field of photocatalysts, and particularly provides an inorganic-organic composite nanoparticle as well as a preparation method and application thereof. The structure of the inorganic-organic composite nanoparticle takes silver as a core, an organic composition coats the outer layer, and the organic matter comprises cross-linked vinyl benzyl chloride, divinyl benzene and benzoyl peroxide. The preparation method comprises the following steps: ultrasonically dispersing silver nanoparticles in a solvent, adding the vinyl benzyl chloride, the divinyl benzene and the benzoyl peroxide, slowly heating the system to a boiling state, keeping boiling to distill out most of the solvent, performing centrifugal dispersing to obtain the inorganic-organic composite nanoparticle, and drying the nanoparticle for later use. The composite nanoparticle can efficiently catalyze and reduce nitrogen dioxide into methanol under an illumination condition. In addition, the core-shellnanoparticles can be recycled for multiple times, so that the capacity of converting carbon dioxide into methanol fuel by a unit material is effectively improved.

Description

technical field [0001] The disclosure relates to the field of photocatalysts, and specifically provides an inorganic-organic composite nanoparticle and a preparation method and application thereof. Background technique [0002] The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] With the development of human society and economy, more and more attention has been paid to the energy crisis and environmental pollution. At present and in the foreseeable future, fossil fuels will still be an important source of energy. A series of environmental problems caused by carbon dioxide and other substances released by fuel combustion, such as the greenhouse effect, acid rain, smog, etc., have increasingly profoundly affected the sustainable development of the earth. [0004] In the carbon source cycle of nature, green plants use sunlight and water to convert carbon dioxide into energy-rich ca...

Claims

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Application Information

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IPC IPC(8): B01J31/06C07C29/159C07C31/04C08F292/00C08F214/14C08F212/36
CPCB01J31/069C07C29/159C08F292/00B01J35/398B01J35/393B01J35/23B01J35/39C08F214/14C08F212/36C07C31/04Y02P20/52
Inventor 刘团伟吴衍泽温世连崔馨田甜魏金建张志德
Owner SHANDONG NORMAL UNIV
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