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Nano material and preparation method thereof

A technology of nanomaterials and conductors, applied in nanocarbon, nanotechnology, nano-optics, etc., can solve the problems of unsatisfactory repeatability and stability cost of synthesis methods, achieve good catalytic stability and repeatability, and improve activity The effect of center distribution and excellent catalytic activity

Pending Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the repeatability, stability and cost of its synthetic method are not very satisfactory at present.

Method used

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  • Nano material and preparation method thereof

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preparation example Construction

[0031] The first aspect of the present disclosure provides a method for preparing nanomaterials, which specifically includes the following steps:

[0032] a. Connect the first conductor to the positive pole of the DC power supply, and connect the second conductor to the negative pole of the DC power supply, then place it in the electrolyte and apply a voltage of 0.1-60V, preferably 5-40V, for electrolysis for 1-20 days, preferably 2 ~ 10 days, the obtained electrolytic electrolyte is concentrated to obtain a carbon dot solution, wherein the first conductor is a graphite rod, and the electrolyte optionally contains a first organic base;

[0033] b. Mixing the silicon source, the active center source, the second organic base and optional water to obtain the first mixture;

[0034] c. Mix the carbon dot solution obtained in step a with the first mixture obtained in step b, and perform a hydrolysis reaction at 20-100° C. for 0.1-12 hours to obtain a second mixture;

[0035] d. Th...

Embodiment 1

[0058] Add 950mL to the beaker and the resistivity is 18MΩ·cm -1 Ultrapure water, then add the tetraethylammonium hydroxide solution of 50g10% by weight, form the electrolytic solution that contains tetraethylammonium hydroxide of 0.5% by weight, anode graphite rod (diameter 10mm length 30cm) and cathode graphite rod (diameter 10mm length 30cm) is placed therein, keeps the distance between the anode graphite rod and the cathode graphite rod at 10cm, the anode graphite rod is connected with the positive pole of DC power supply and the cathode graphite rod is connected with the negative pole of DC power supply, applies 20V The voltage was electrolyzed for 3 days, and the electrolytic solution obtained after electrolysis was concentrated to obtain a carbon dot solution with a carbon dot concentration of 0.5 mg / mL; 22.5 g of tetraethyl orthosilicate, 1.1 g of tetrabutyl titanate, tetra Propyl ammonium hydroxide (25% aqueous solution) 7g and deionized water 50g were mixed to obtain...

Embodiment 2

[0060] Add 995mL to the beaker and the resistivity is 18MΩ·cm -1 Ultrapure water, then add 5g 10% by weight of tetraethylammonium hydroxide solution, form the electrolytic solution that contains tetraethylammonium hydroxide of 0.05% by weight, anode graphite rod (diameter 10mm length 30cm) and cathode graphite Rod (10mm in diameter and 30cm in length) is placed therein, and the distance between the anode graphite rod and the cathode graphite rod is kept at 30cm, the anode graphite rod is connected to the positive pole of the DC power supply and the cathode graphite rod is connected to the negative pole of the DC power supply, and 60V is applied Electrolysis was carried out at a voltage of 2 days, and the electrolytic solution obtained after electrolysis was concentrated to obtain a carbon dot solution with a carbon dot concentration of 0.5 mg / mL; 22.5 g of tetraethyl orthosilicate, 1.1 g of tetraethyl titanate, Tetrapropylammonium hydroxide (25% aqueous solution) 7g and deioni...

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Abstract

The invention relates to a preparation method of a nano material and the nano material prepared by the method. The method comprises the following steps: a, preparing a carbon dot solution; b, uniformly mixing a silicon source, an active center source, organic alkali and optional water to obtain a first mixture; c, mixing the carbon dot solution with the first mixture for hydrolysis reaction to obtain a second mixture; and d, carrying out hydrothermal treatment on the second mixture, collecting a solid product, washing, drying and roasting to obtain the nano material. The nanomaterial disclosed by the invention has excellent catalytic activity in the oxidation reaction of phenol, and meanwhile, the catalytic stability and repeatability are relatively good.

Description

technical field [0001] The present disclosure relates to a nanometer material and a preparation method thereof. Background technique [0002] Similar to ordinary nanomaterials, carbon nanomaterials have special properties such as quantum size effects, small size effects, and macroscopic quantum tunneling effects in optics, electricity, and magnetism. In 2004, the fine carbon nanoparticles with a size less than 10nm discovered during the purification of single-walled carbon nanotubes by electrophoresis were named carbon dots for the first time, which is a new type of small-sized carbon nanomaterial. Due to its excellent fluorescent properties, carbon dots are also called fluorescent carbon dots. In just over ten years from the discovery of fluorescent carbon dots to their application, fluorescent carbon dots have become a new star in the carbon nano family. The materials for synthesizing fluorescent carbon dots are becoming more and more abundant, and the preparation method...

Claims

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Application Information

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IPC IPC(8): C01B32/15C09K11/65B01J21/18B01J35/10B82Y20/00
CPCC01B32/15C09K11/65B01J21/18B82Y20/00B01J35/60
Inventor 史春风康振辉黄慧王肖孙悦周赟杰
Owner CHINA PETROLEUM & CHEM CORP
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