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A kind of porous silicon-supported copper nanoparticle and its preparation method and application

A nanoparticle, porous silicon technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of pollution, high energy consumption, long cycle and so on

Active Publication Date: 2022-07-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the main methods of removal include adsorption method, ultrasonic method, anaerobic biological treatment method, aerobic biological treatment method, photocatalytic method, electrochemical method, Fenton method, ozone oxidation method, wet oxidation method, but these methods all have certain limitations. Defects, such as easy to cause new pollution, need for follow-up treatment, difficult condition control, high cost, high energy consumption, long cycle, low efficiency for high-concentration wastewater

Method used

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  • A kind of porous silicon-supported copper nanoparticle and its preparation method and application
  • A kind of porous silicon-supported copper nanoparticle and its preparation method and application
  • A kind of porous silicon-supported copper nanoparticle and its preparation method and application

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preparation example Construction

[0037] The invention provides a preparation method of porous silicon-supported copper nanoparticles, comprising the following steps:

[0038] Carrying out the first centrifugation of the porous silicon nanoparticle isopropanol suspension to obtain the first precipitate;

[0039] After ultrasonically mixing the first precipitate with the HF solution, a second centrifugation is performed to obtain a second precipitate;

[0040] The second precipitation, polyvinylpyrrolidone solution, CuSO 4 The solution is mixed with the hydrazine hydrate solution, and a reduction reaction is performed to obtain the porous silicon-supported copper nanoparticles.

[0041] In the present invention, the porous silicon nanoparticle isopropanol suspension is subjected to the first centrifugation to obtain the first precipitate.

[0042] In the present invention, the concentration of the porous silicon nanoparticles in the isopropanol suspension of the porous silicon nanoparticles is preferably 0.6×...

Embodiment 1

[0067] The 0.6 × 1 billion / mL suspension of porous silicon nanoparticles in isopropanol (IPA) was placed in a 1 mL EP tube, centrifuged at 12,000 rpm for 1 min, the IPA supernatant was removed, and 1 mL of 0.05% volume fraction was added to it. The HF solution was sonicated for 5 min, centrifuged at 13000 rpm for 1 min, removed the supernatant, washed twice with water and twice with isopropanol, removed the residual HF solution, and added 1 mL of 10% PVP solution, 60 μL CuSO 4 (10 mmol / L) solution and 1 μL of hydrazine hydrate solution (80% by mass), mixed quickly, ultrasonically reacted for 20 min, centrifuged at 13,000 rpm for 1 min, removed the supernatant, washed with water three times, and washed with isopropanol three times. Residual PVP solution was removed to obtain light gray-black precipitates (Si@Cu NPs) which were kept in isopropanol solution.

[0068] (1) Characterization of Si@Cu NPs

[0069] like figure 1 where (a) is the physical image of the Si NPs suspensi...

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Abstract

The invention provides a porous silicon-supported copper nanoparticle and a preparation method and application thereof, belonging to the technical field of wastewater treatment. The Si@CuNPs prepared by the invention is a nano-enzyme with laccase activity, which utilizes the properties of porous silicon with large pore volume and large surface area, and the synthesized nano-enzyme has many catalytic sites, good catalytic activity, and porous silicon particles are protected. The copper nanoparticles are distributed in the pores to improve the stability, and the active particles are distributed in the pores to improve the collision probability of the reactants, thereby improving the catalytic activity. Si@Cu NPs have excellent catalytic activity and substrate versatility, and the laccase-like activity of Si@Cu NPs is the highest at pH=7 and temperature of 80 °C. Moreover, Si@CuNPs showed strong stability under various conditions such as high temperature and long-term storage. Si@CuNPs can degrade chlorophenols and dyes well in a certain concentration range.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a porous silicon-supported copper nanoparticle and a preparation method and application thereof. Background technique [0002] Phenolic compounds (such as chlorophenols) and dyes in the textile industry are common toxic pollutants due to their widespread use in wood preservatives, pesticides, disinfectants, and printing and dyeing processes. Reproductive toxicity, neurotoxicity, and endocrine disruption pose a threat to human health and are widely detected in subsurface soils and water bodies, so there is an urgent need to remove these toxicants. At present, the main removal methods include adsorption method, ultrasonic method, anaerobic biological treatment method, aerobic biological treatment method, photocatalytic method, electrochemical method, Fenton method, ozone oxidation method and wet oxidation method, but these methods all have certain limitations. Defects...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01J35/10B01J37/16C02F1/00C02F101/30C02F101/34C02F101/36
CPCB01J23/72B01J35/023B01J35/1004B01J35/10B01J37/16B82Y30/00B82Y40/00C02F1/00C02F2101/308C02F2101/345C02F2101/36Y02W10/37
Inventor 郭轶徐力张天奇黄斯俊
Owner JILIN UNIV
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