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Porous silicon loaded copper nanoparticles as well as preparation method and application thereof

A nanoparticle and porous silicon technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve problems such as pollution, high energy consumption, and long cycle time

Active Publication Date: 2021-10-22
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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  • Porous silicon loaded copper nanoparticles as well as preparation method and application thereof
  • Porous silicon loaded copper nanoparticles as well as preparation method and application thereof
  • Porous silicon loaded copper nanoparticles as well as preparation method and application thereof

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preparation example Construction

[0037] The invention provides a method for preparing porous silicon-loaded copper nanoparticles, comprising the following steps:

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

[0039] ultrasonically mixing the first precipitate with the HF solution and performing a second centrifugation to obtain a second precipitate;

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

[0041] In the present invention, the isopropanol suspension of porous silicon nanoparticles is first centrifuged to obtain the first precipitate.

[0042] In the present invention, the concentration of porous silicon nanoparticles in the isopropanol suspension of porous silicon nanoparticles is preferably 0.6×1 billion / mL.

[0043] In the pre...

Embodiment 1

[0067] The porous silicon nanoparticle isopropanol (IPA) suspension at a concentration of 0.6×1 billion / mL 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% HF solution, ultrasonic treatment for 5min, centrifugation at 13000rpm for 1min, remove the supernatant, wash twice with water, wash twice with isopropanol, remove the residual HF solution, add 1mL PVP solution with a mass fraction of 10%, 60μL CuSO 4 (10mmol / L) solution, 1 μL of hydrazine hydrate solution (mass fraction is 80%), mix quickly, carry out ultrasonic reaction for 20min, centrifuge at 13000rpm for 1min, remove the supernatant, wash three times with water, wash three times with isopropanol, and The residual PVP solution was removed to obtain a gray-black precipitate (Si@Cu NPs) preserved in isopropanol solution.

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

[0069] Such as figure 1 , where (a) is the physical picture of the Si NPs suspension, (...

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Abstract

The invention provides porous silicon loaded copper nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of wastewater treatment. The Si@ CuNPs prepared by the invention is a nano enzyme with laccase activity; the properties of large pore volume and large surface area of porous silicon are utilized, the synthesized nano enzyme has multiple catalytic sites and better catalytic activity, and porous silicon particles protect copper nanoparticles distributed in pores, so that the stability is improved; and the active particles are distributed in the holes, so that the collision probability of reactants is increased, and the catalytic activity is improved. The Si@CuNPs has excellent catalytic activity and substrate universality, and when the pH is equal to 7 and the temperature is 80 DEG C, the laccase-like activity of the Si@CuNPs is the highest. In addition, Si@ CuNPs shows relatively high stability under various conditions of high temperature, long-term storage and the like. The Si@CuNPs can be used for well degrading chlorophenol and dye in a certain concentration range.

Description

technical field [0001] The invention relates to the technical field of waste water 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 have become common toxic pollutants due to their wide application in wood preservatives, insecticides, disinfectants and printing and dyeing processes. Reproductive toxicity, neurotoxicity, and endocrine disruption pose threats to human health and are also widely detected in subsurface soil and water bodies, so the removal of these toxic substances is urgent. 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 limitati...

Claims

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Application Information

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IPC IPC(8): B01J23/72B01J35/10B01J37/16C02F1/00C02F101/30C02F101/34C02F101/36
CPCB01J23/72B01J37/16B82Y30/00B82Y40/00C02F1/00C02F2101/308C02F2101/345C02F2101/36B01J35/40B01J35/60B01J35/61Y02W10/37
Inventor 郭轶徐力张天奇黄斯俊
Owner JILIN UNIV
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