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Nickel aluminum hydrotalcite oxide/quantum dot/nano gold composite film modified electrode and preparation method thereof

A technology of nickel-aluminum hydrotalcite and carbon quantum dots is used in measuring devices, material analysis by electromagnetic means, instruments, etc., which can solve the problems of poor enzyme activity, poor catalysis, and poor nano-gold dispersibility. The effect of stable reaction process, large specific surface area and strong adsorption

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 specific surface area of ​​the electrode modified material is small, the catalytic performance is not good, the adsorption is not strong, and the enzyme activity is poor, etc. At the same time, the synthesis method of carbon quantum dots is complicated, the cost is high, and there is environmental pollution. etc.; the dispersion of gold nanoparticles is poor, the reproducibility of synthesis is poor, and the activity is not high, etc.

Method used

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  • Nickel aluminum hydrotalcite oxide/quantum dot/nano gold composite film modified electrode and preparation method thereof
  • Nickel aluminum hydrotalcite oxide/quantum dot/nano gold composite film modified electrode and preparation method thereof
  • Nickel aluminum hydrotalcite oxide/quantum dot/nano gold composite film modified electrode and preparation method thereof

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Embodiment 1

[0052] 1. Preparation of nickel aluminum hydrotalcite oxide (Ni / Al-LDO)

[0053] 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, 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 350°C, and it is calcined for 3 hours to obtain Ni / Al-LDO.

[0054] 2. Preparation of carbon quantum dots (C-dots)

[0055] Step 1: prepare an electrolyte solution; mi...

Embodiment 2

[0067] 1. Preparation of nickel aluminum hydrotalcite oxide (Ni / Al-LDO)

[0068] 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 NaOH aqueous solution to ensure the pH is 10.5-11.5, react for 12 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 450° C., and calcine for 5 hours to obtain Ni / Al-LDO.

[0069] 2. Preparation of carbon quantum dots (C-dots)

[0070] Step 1: prepare an electrolyte solution; mix 170...

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Abstract

The invention discloses a nickel aluminum hydrotalcite oxide / quantum dot / nano gold composite film modified electrode and a preparation method thereof. The preparation method comprises following steps:taking sodium hydroxide as electrode and glycol as the precursor of carbon quantum dots, preparing a mixed water solution of sodium hydroxide and glycol; electrifying obtained mixed water solution tocarry out electrolysis so as to prepare a carbon quantum dot water solution; mixing excess carbon quantum dot water solution with a chloroauric acid solution, carrying out reactions to prepare a mixed solution of carbon quantum dots and nano gold; then dispersing nickel aluminum hydrotalcite oxide into a Nafion solution to obtain suspension; dropwise adding the suspension on an electrode, dryingthe electrode; then dropwise adding the mixed solution containing carbon quantum dots and nano gold on the electrode, and drying to obtain the nickel aluminum hydrotalcite oxide / quantum dot / nano goldcomposite film modified electrode. The composite film modified electrode has the advantages of large specific surface, good catalytic performance, and strong adsorbing performance, and has activity, which is similar with that of peroxidase.

Description

technical field [0001] The invention relates to a nickel-aluminum hydrotalcite oxide / carbon quantum dot / nano-gold composite film modified electrode and a preparation method thereof. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/327
CPCG01N27/308G01N27/3278
Inventor 刘梦琴许志锋李俊华曾荣英
Owner HENGYANG NORMAL UNIV
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