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A kind of silver-carbon quantum dot compound and its preparation method and application

A carbon quantum dot, silver carbon quantum technology, applied in the field of silver carbon quantum dot composite and its preparation, can solve the problem of low production efficiency of aminophenol, and achieve the effects of high speed, high efficiency catalyst and less dosage

Active Publication Date: 2020-10-23
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the present invention provides a silver-carbon quantum dot composite and its preparation method and application, which are used to solve the problem that the production efficiency of p-aminophenol is relatively low at present

Method used

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  • A kind of silver-carbon quantum dot compound and its preparation method and application
  • A kind of silver-carbon quantum dot compound and its preparation method and application
  • A kind of silver-carbon quantum dot compound and its preparation method and application

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preparation example Construction

[0043] The present invention also provides a method for preparing a silver-carbon quantum dot composite, comprising the following steps:

[0044] a) Carrying out carbonization reaction of cuttlefish juice and water to obtain carbon quantum dots;

[0045] b) reacting carbon quantum dots with soluble silver salts in situ to obtain a silver-carbon quantum dot composite.

[0046] In the present invention, the water content of the cuttlefish juice is 15%-25%, preferably 10%-20%, more preferably 15%.

[0047] Cuttlefish juice is the powder obtained by processing and drying cuttlefish sac juice.

[0048] The mass ratio of cuttlefish juice to water is 0.5-1.5:15-25, preferably 0.8-1.2:18-24, more preferably 1:20.

[0049] The carbonization reaction is carried out under airtight conditions.

[0050] The temperature of the carbonization reaction is 160°C to 200°C, preferably 175°C to 185°C, more preferably 180°C.

[0051] The carbonization reaction time is 10h-14h, preferably 11.5h-...

Embodiment 1

[0085] The preparation of embodiment 1 silver-carbon quantum dot composite

[0086] In this embodiment, water-soluble fluorescent carbon quantum dots are used as raw materials to prepare silver-carbon quantum dot composites, including the following steps:

[0087] 1) Carrying out carbonization reaction of cuttlefish juice with a water content of 15% and water at 180° C. for 12 hours, and drying to obtain a water-soluble fluorescent carbon quantum dot solid;

[0088] 2) Dissolve 0.05 g of the water-soluble fluorescent carbon quantum dot solid with distilled water, and make it into a 0.5 mg / mL water-soluble fluorescent carbon quantum dot solution at a constant volume in a 100 mL volumetric flask, ready for use.

[0089] 3) Take 100mL of the above-prepared water-soluble fluorescent carbon quantum dot solution and place it in a 250mL round-bottomed flask whose outer wall is covered with tin foil for light-proof treatment, add 0.068g of silver nitrate, shake evenly, and place it in...

Embodiment 2

[0092] Example 2 Silver-carbon quantum dot composite catalyzes the reduction reaction of p-nitrophenol

[0093] In this embodiment, ultraviolet-visible spectrophotometry is used to detect the catalytic effect of the silver-carbon quantum dot composite on the reduction reaction of p-nitrophenol, including the following steps:

[0094] 1) Accurately weigh 13.91mg of p-nitrophenol reagent and dissolve it in distilled water, and make it into a 1mM p-nitrophenol solution in a 100mL volumetric flask for use.

[0095] Accurately weigh 11.35mg NaBH 4 Dissolve in distilled water, and make NaBH with a concentration of 30mM in a 10mL volumetric flask 4 solution, ready to use.

[0096] 2) Add 2 mL of distilled water, 200 μL of prepared p-nitrophenol solution and 1 mL of prepared NaBH to the centrifuge tube 4 solution, mix well to obtain p-nitrophenol solution and NaBH 4 The mixed solution was reacted for 6min. Using ultraviolet spectrophotometry, ultraviolet detection was carried out...

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Abstract

The invention belongs to the technical field of carbon nanomaterials and especially relates to a silver-carbon quantum dots compound and a preparation method and application thereof. The silver-carbonquantum dots compound comprises carbon quantum dots and silver loaded on the surface of the carbon quantum dots. The carbon quantum dots are obtained through carbonization of squid ink. The silver-carbon quantum dots compound can be used as a catalyst for catalyzing p-nitrophenol reduction reaction. By ultraviolet spectrophotometry for detecting catalytic action of the silver-carbon quantum dotscompound on p-nitrophenol reduction reaction, results show that the silver-carbon quantum dots compound has fast catalytic speed of reduction reaction. Dosage of the silver-carbon quantum dots compound as a catalyst is less, and an efficient catalyst is provided for the catalytic reduction reaction of p-nitrophenol.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials, and in particular relates to a silver-carbon quantum dot composite and a preparation method and application thereof. Background technique [0002] p-Nitrophenol is a light yellow crystalline chemical substance, slightly soluble in water at room temperature, and not easily volatilized with steam. p-Nitrophenol is widely used as an important raw material for organic synthesis, and can be used as an intermediate of fine chemicals such as pesticides, medicines, and dyes. p-aminophenol, also known as p-hydroxyaniline, is an important chemical raw material and organic intermediate, and has a wide range of application values ​​in medicine, dyes, pesticides, antioxidants, etc. At present, the most important application of p-aminophenol in my country is the production of paracetamol in medicine. Paracetamol is the most commonly used antipyretic and analgesic drug in the world. It is recogni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50C07C213/02C07C215/76
CPCB01J23/50C07C213/02C07C215/76
Inventor 周丽华杨春丽张宝方袁勇
Owner GUANGDONG UNIV OF TECH
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