Ultra-thin MXene nanometer material as well as preparation method and application thereof

A nano-material and ultra-thin technology, applied in the field of electrochemistry, can solve problems such as complex operation procedures, limited applications, and poor selectivity, and achieve good application prospects, unique metal conductivity, and simple methods

Inactive Publication Date: 2019-11-12
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these analytical methods also have obvious disadvantages, such as complicated operating procedures, poor selectivity, and high cost, which limit their applications.

Method used

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  • Ultra-thin MXene nanometer material as well as preparation method and application thereof
  • Ultra-thin MXene nanometer material as well as preparation method and application thereof
  • Ultra-thin MXene nanometer material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1 ultra-thin MXene nanomaterial

[0034] (1) The preparation method is as follows

[0035] 1. Preparation of multilayer MXene nanomaterials

[0036] Add 120 mL of 40% hydrofluoric acid to a plastic beaker, then place it in an oil bath, and slowly add 1 g of Ti 3 AlC 2 Stir continuously, react at 25°C for 72h, centrifuge the product at 3500rpm for 5min, wash with water, repeat several times until pH = 6, and dry in vacuum at 60°C for 12h to obtain multilayer MXene nanomaterials.

[0037] 2. Preparation of ultrathin MXene nanomaterials

[0038] Add 0.5g of multilayer MXene to 100mL dimethyl sulfoxide (DMSO), heat and stir in an oil bath at 25°C for 100h, then let it stand for 3h, then ultrasonicate for 5h, centrifuge the product at 3500rpm for 10min, and pump the supernatant Filter and dry in a vacuum oven at 60°C for 12 hours to obtain ultrathin MXene nanomaterials.

[0039] (2) Test results

[0040] Figure 1a is the SEM topography of ultra-thin MXene n...

Embodiment 2

[0042] Embodiment 2 Preparation of Modified Electrode

[0043] (1) Electrode pretreatment

[0044] Use 0.1, 0.3, 0.05μm A1 respectively 2 o 3 Polish the glassy carbon electrode. Then, ultrasonic cleaning was performed with acetone, ethanol, and ultrapure water for 1 min in sequence. The glassy carbon electrode is used as the working electrode, the Ag / AgCl electrode is used as the reference electrode, and the platinum wire is used as the counter electrode. -3 mol / L K 3 Fe(CN) 6 The electrochemical cyclic voltammetry (CV) test was carried out in the 1mol / L KCl solution, and the scanning range was -0.2-1.0V (vs.Ag / AgCl). After the test, the electrodes were cleaned with ultrapure water and dried with high-purity nitrogen gas for later use.

[0045] (2) Preparation of ultrathin MXene nanomaterial modified electrode

[0046] The ultra-thin MXene nanomaterial prepared in Example 1 was dissolved in water, and 5 μL of the ultra-thin MXene nanomaterial aqueous solution with a co...

Embodiment 3

[0057] Example 3 Ultrathin MXene Nanomaterial Modified Electrode Catalytic Detection Performance of Catechol

[0058] (1) Detection performance of ultra-thin MXene nanomaterial modified electrode for different concentrations of catechol

[0059] The ultra-thin MXene modified electrode prepared in Example 2 (two) is used as the working electrode, the Ag / AgCl electrode is the reference electrode, and the platinum electrode is the auxiliary electrode, and 1.0, 1.5, 2.0 , 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5 μmol / L (a-j) of catechol, the test results are shown in Figure 5, Figure 5a is the differential pulse voltammogram at different catechol concentrations, Figure 5b It is a calibration diagram of the peak current changing with the concentration of catechol. When the concentration of catechol in the supporting electrolyte gradually increases, the oxidation peak current of the modified electrode will gradually increase, which proves that the modified electrode has a good catalytic...

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Abstract

The invention belongs to the field of electrochemistry, and particularly relates to an ultra-thin MXene nanometer material. A preparation method comprises the following steps of ultrasonically dispersing a plurality of layers of MXenes into dimethyl sulfoxide to form a stably dispersed turbid liquid, stirring, carrying out ultrasonic treatment, and carrying out centrifugal water washing to obtainthe ultra-thin MXene nanometer material. The application of the ultra-thin MXene nanometer material in detection of catechol is provided. A solution of catechol is added into an acetic acid-sodium acetate buffer solution, and a three-electrode system is adopted for detection with an electrode modified by the ultra-thin MXene nanometer material as a working electrode, an Ag/AgCl electrode as a reference electrode and a platinum electrode as an auxiliary electrode. The MXene has unique metal conductivity, biocompatibility and good dispersion in a water phase, and the ultra-thin MXene nanometer material can accelerate an electron transfer rate, so that the sensitivity and selectivity of an electrochemical sensor can be effectively improved.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to an ultrathin MXene nanometer material and its preparation method and application. Background technique [0002] Catechol is a natural bisphenol compound commonly found in plants such as tea and fruit, as well as in wine, beer, fruit juice and some traditional Chinese medicines. Catechol has been extensively studied due to its biological importance as an antioxidant, antiviral and modulator of enzyme activity. In addition, the widespread discharge of catechols in industrial wastewater and exhaust gas may cause severe environmental pollution. Therefore, it is necessary to develop a highly sensitive, rapid and stable analytical method for the determination of catechol. In recent years, various analytical methods have been applied to the determination of catechol, especially spectrophotometry, gas chromatography and high performance liquid chromatography. However, these...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30G01N27/48B82Y40/00B82Y30/00B82Y15/00
CPCB82Y15/00B82Y30/00B82Y40/00G01N27/308G01N27/48
Inventor 宋溪明王雨露吴抒遥隋成荃张鹏张赫
Owner LIAONING UNIVERSITY
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