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Copper hydroxyphosphate-organic metal ion skeleton/multi-walled carbon nanotube composite material as well as preparation method and application thereof

A technology of multi-walled carbon nanotubes and copper hydroxyphosphate, applied in the fields of nanomaterials and electrochemical sensors, can solve the problems of long operation time and expensive instruments, and achieve improved stability and adsorption, excellent mechanical properties, and excellent detection ability. Effect

Pending Publication Date: 2022-05-27
SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method takes a long time to operate, the equipment is expensive, and complex sample pretreatment is required.

Method used

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  • Copper hydroxyphosphate-organic metal ion skeleton/multi-walled carbon nanotube composite material as well as preparation method and application thereof
  • Copper hydroxyphosphate-organic metal ion skeleton/multi-walled carbon nanotube composite material as well as preparation method and application thereof
  • Copper hydroxyphosphate-organic metal ion skeleton/multi-walled carbon nanotube composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Synthesis of CHP

[0044] Add 3.2 g of copper acetate to 80 mL of water, stir evenly, slowly add 0.544 mL of phosphoric acid dropwise [n(copper acetate):n(phosphoric acid)=2.0:1.0], and stir for 1 h. After the suspension was mixed evenly, it was added to the reaction kettle, placed in an oven, and heated at 140 °C under normal pressure for 4 h. After the reaction, the precipitate was obtained by centrifugation, washed three times with deionized water and ethanol respectively, and dried at room temperature for 12 h to obtain a green solid, which was the copper source CHP.

[0045] CHP@Cu 3 (BTC) 2 Synthesis

[0046] Add 1.3 g of CHP prepared above to 51 mL of water and stir, then add 45 mL of a mixed solution of trimesic acid and N,N-dimethylformamide (DMF) (0.025 mol L -1 ), the pH of the solution was adjusted to 6 with 4% NaOH solution, and after stirring at room temperature for 1 h, the precipitate was recovered by centrifugation, washed three times with ethanol, ...

Embodiment 2

[0056] Electrochemical Characterization of Different Modified Electrodes

[0057] In order to examine the electrochemical behavior of different modified electrodes, at 5 mmol·L -1 K[Fe(CN) 6 ] 3- / 4- 0.1mol·L -1 In the KCl solution, CV was used to scan GCE, CHP@Cu 3 (BTC) 2 / GCE, MWCNTs / GCE, CHP@Cu 3 (BTC) 2 / MWCNTs / GCE four different electrodes, by studying the peak potential and current magnitude presented by different electrodes, the performance of the electrodes is judged. CV curve such as image 3 shown, although CHP@Cu 3 (BTC) 2 The peak current of the / GCE electrode is smaller than that of GCE, but the CHP@Cu 3 (BTC) 2 The electrochemical peak current value increased after the composite of / MWCNTs, indicating that the composite material has a good effect on Fe 2+ / Fe 3+ The electron pair has a very good electrocatalytic ability, which fully reflects the good synergistic effect between MOFs and MWCNTs, and enhances their electrical conductivity and electrocat...

Embodiment 3

[0060] The effect of buffer solution pH

[0061] In the electrochemical reaction of organic compounds, protons always participate and play a role, and the pH value of the buffer solution has an important influence on the proton transfer between compounds. Figure 5 (A) is CHP@Cu 3 (BTC) 2 / MWCNTs / GCE in 0.1M phosphate buffered saline (PBS), to 2.5×10 -4 mol·L -1 Graph of the LSV response of the CPM solution. Depend on Figure 5 (B) It can be seen that E and pH change linearly, and the linear regression equation is: Potential=-0.05291pH+1.089(R 2 = 0.9384). As the pH value increased from 5.0 to 10.0, the peak current of CPM first increased and then decreased, and the potential gradually shifted negatively, reaching the maximum value at pH 8.0. This indicates that the pH value of the buffer solution will hinder the proton transfer between CPMs, so the PBS buffer solution with pH 8.0 was selected for subsequent experiments.

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Abstract

The invention relates to a copper hydroxyphosphate-organic metal ion skeleton / multi-walled carbon nanotube composite material and a preparation method and application thereof.The preparation method includes the steps that phosphoric acid is dropwise added into a copper acetate aqueous solution, and the mixture is transferred into a reaction kettle to be heated; cooling to obtain a mixed solution B, centrifuging, washing and drying to obtain CHP; cHP, trimesic acid and N, N-dimethylformamide are added into deionized water and stirred and mixed to be uniform, and a mixed solution C is obtained; and adjusting the pH value of the mixed solution C, centrifugally recovering the precipitate, cleaning, drying, and carrying out ultrasonic dispersion on CHP-coated Cu3 (BTC) 2 and MWCNTs in an organic solvent to obtain the CHP-coated Cu3 (BTC) 2 / MWCNTs composite material. Compared with the prior art, the material has the advantages that the property of the relatively stable inner core is reserved in the synthesis process, the stability and the adsorbability of the material are greatly improved, and an electrochemical sensor constructed based on the material is expected to show more excellent detection capability and electrocatalytic activity.

Description

technical field [0001] The invention relates to the technical field of nanomaterials and electrochemical sensors, in particular to a copper hydroxyphosphate-organic metal ion framework / multi-walled carbon nanotube composite material and a preparation method and application thereof. Background technique [0002] Chlorpheniramine maleate (CPM), alias chlorpheniramine, chlorpheniramine maleate, chlorpheniramine, is a first-generation H1 receptor blocker. It is commonly used in clinical skin allergies, allergic rhinitis and food allergies. It can also be combined with other drugs such as dextromethorphan and pseudoephedrine hydrochloride to form compound preparations to treat colds. The main adverse reactions are dizziness, drowsiness, central nervous system damage, cardiovascular system damage, shock, etc. Since some adverse reactions are rare but serious and unpredictable, in order to ensure the safety of clinical medication, a rapid and sensitive detection method is establish...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J37/34G01N27/30G01N27/48
CPCB01J31/1691B01J31/2239B01J37/343G01N27/308G01N27/48B01J2531/16B01J35/33
Inventor 梁莹李晨烨黄琳琰蔡鑫如林佳妮徐一新
Owner SHANGHAI UNIV OF MEDICINE & HEALTH SCI
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