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Preparation method of carbon quantum dot, nano gold, and composite film and combined electrode

A technology of carbon quantum dots and composite films, applied in the direction of nano-carbon, nanotechnology, measuring devices, etc., can solve the problems of poor enzyme activity, poor catalytic performance, and environmental pollution, and achieve stable storage and reaction processes and high specific surface area Large, good catalytic effect

Active Publication Date: 2018-08-17
HENGYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is that the synthesis method of carbon quantum dots is complicated, the cost is high, and there is environmental pollution, etc.; the dispersion of nano gold is poor, the synthesis reproducibility is poor, and the activity is not high; Poor sex, weak adsorption and poor enzymatic activity

Method used

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  • Preparation method of carbon quantum dot, nano gold, and composite film and combined electrode
  • Preparation method of carbon quantum dot, nano gold, and composite film and combined electrode
  • Preparation method of carbon quantum dot, nano gold, and composite film and combined electrode

Examples

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Embodiment 1

[0043] 1. Preparation of nickel aluminum hydrotalcite oxide (Ni / Al-LDO)

[0044] Weigh 2.0g Ni(NO 3 ) 2 ·6H 2 O and 1.0g Al(NO 3 ) 3 9H 2 O, dissolved in 100mL of deionized water to prepare a nitrate aqueous solution. Weigh 1.0g Na 2 CO 3 and 2.0g of NaOH were dissolved in 50mL of deionized water, stirring continuously to dissolve them all. Transfer all the nitrate aqueous solution to a 250mL three-neck flask, put the flask into a water bath, set the temperature at 65°C, and add Na 2 CO 3 React with an aqueous solution of NaOH at a pH of 10.5 to 11.5, react for 10 hours, filter and wash until neutral, put it in an oven and dry at 100°C for 12 hours to obtain nickel-aluminum hydrotalcite. Take part of the nickel-aluminum hydrotalcite and put it into a muffle furnace for calcination, the temperature is set at 350°C, and it is calcined for 3 hours to obtain Ni / Al-LDO.

[0045] 2. Preparation of carbon quantum dots (C-dots)

[0046] The first step: prepare an electroly...

Embodiment 2

[0058] 1. Preparation of nickel aluminum hydrotalcite oxide (Ni / Al-LDO)

[0059] Weigh 4.0g Ni(NO 3 ) 2 ·6H 2 O and 2.0g Al(NO 3 ) 3 9H 2 O, dissolved in 100mL of deionized water to prepare a nitrate aqueous solution. Weigh 3.0g Na 2 CO 3 and 4.0g of NaOH were dissolved in 50mL of deionized water, stirring continuously to dissolve them all. Transfer all the nitrate aqueous solution to a 250mL three-neck flask, put the flask into a water bath, set the temperature at 65°C, and add Na 2 CO 3 and an aqueous NaOH solution to ensure a pH of 10.5 to 11.5, react for 12 hours, filter and wash until neutral, and dry in an oven at 100°C for 12 hours to obtain nickel-aluminum hydrotalcite. Take part of the nickel-aluminum hydrotalcite and put it into a muffle furnace for calcination, the temperature is set at 450° C., and calcine for 5 hours to obtain Ni / Al-LDO.

[0060] 2. Preparation of carbon quantum dots (C-dots)

[0061] The first step: prepare an electrolyte solution; ta...

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Abstract

The invention discloses a preparation method of a carbon quantum dot, nano gold, and a composite film and a combined electrode. The preparation method of the carbon quantum dot comprises following steps: taking sodium hydroxide as electrolyte and ethylene glycol as the precursor of the carbon quantum dot, preparing a mixed water solution of sodium hydroxide and ethylene glycol; electrifying the mixed water solution to carry out electrolysis; after electrolysis, adjusting the pH of the solution to neutral; after pH adjustment, and subjecting the solution to dialysis to obtain a carbon quantum dot water solution. Ethylene glycol is taken as the precursor, carbon quantum dot is synthesized by a one-step electrolysis method, the carbon quantum dot has the advantages of good water solubility and high stability; the surface of the carbon quantum dot comprises a large amount of hydroxyl groups and carboxyl groups; the excellent reducing performance and stability of the carbon quantum dot areused to reduce chloroauric acid so as to prepare nano gold; the prepared nano gold is highly dispersed, the repeatability is good, and moreover, the nano gold is stable during the storage process andreaction process and has enzymatic activity of peroxides.

Description

technical field [0001] The invention relates to a preparation method of carbon quantum dots, nano gold, composite films and composite electrodes. Background technique [0002] Hydrotalcite (LDH) is a kind of anionic clay with layered structure. It has basic characteristics, microporous structure, memory effect, intercalation function, exchangeability and electrochemical performance of interlayer anions, so in many aspects such as It has a wide range of applications in adsorption, electrochemistry, photochemistry, medicine, catalysis, etc. Due to its large specific surface, hydrotalcite is easy to combine with negatively charged substances when it is positively charged, and it is easy to accept guest molecules between layers. When transition metals are used as the constituent elements of LDH, during the chemical reaction , there will be electron gain and loss, so hydrotalcite nanomaterials have good electrocatalysis, high selectivity, high conversion rate and are not easy to...

Claims

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Application Information

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IPC IPC(8): G01N27/48G01N27/30C01B32/15B82Y40/00B22F9/24
CPCB22F9/24B82Y40/00C01B32/15G01N27/308G01N27/48
Inventor 刘梦琴许志锋李俊华曾荣英
Owner HENGYANG NORMAL UNIV
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