CN-122016949-A - TA-MXene composite material for acetone detection and preparation method and application thereof

CN122016949ACN 122016949 ACN122016949 ACN 122016949ACN-122016949-A

Abstract

The invention discloses a TA-MXene composite material for acetone detection, a preparation method and application thereof, wherein the TA-MXene composite material for acetone detection is a nano lamellar structure material formed by Tartaric Acid (TA) and nano lamellar MXene, and the TA-MXene composite material is applied to modification of Au interdigital electrodes to manufacture a sensor for detecting acetone gas. The preparation method of the TA-MXene composite material for acetone detection has the advantages of simplicity in operation and excellent material performance, is low in implementation cost, has huge application potential for real-time monitoring and sensing of acetone in various systems which relate to generation, participation reaction and clinical exhaled air detection of gaseous acetone, and can also provide convenience for preparation of other acetone gas sensors and preparation of other semiconductor material sensors.

Inventors

JIANG YU
CHEN YIFAN
Zheng Wenxun
PAN YONG
WANG LU
CHEN HAOJIE

Assignees

南京工业大学

Dates

Publication Date: 20260512
Application Date: 20260126

Claims (10)

1. The TA-MXene composite material for acetone detection is characterized in that the TA-MXene composite material is a nano lamellar structure material formed by tartaric acid and nano lamellar MXene.
2. The TA-MXene composite material for acetone detection according to claim 1, wherein the thickness of the nano lamellar structure material is 10-15 nm, and the interlayer spacing is 20-50 nm.
3. The preparation method of the TA-MXene composite material for acetone detection is characterized by comprising the following steps of: step 1, mixing hydrochloric acid and lithium fluoride, adding the mixture into a beaker for reaction, and heating and stirring the mixture to obtain an initial mixed solution; Step 2, adding vanadium aluminum carbide into the initial mixed solution for etching, and then sequentially carrying out centrifugal separation, ultrasonic cleaning and freeze drying treatment to obtain nano lamellar MXene; Step 3, respectively mixing tartaric acid and MXene with deionized water and uniformly stirring to obtain respective mixed solutions, and then mutually mixing and uniformly stirring the two mixed solutions to obtain the mixed solution of tartaric acid and MXene; and 4, sequentially performing heat-insulating heat treatment, centrifugal separation, ultrasonic washing, freeze drying and annealing treatment on the mixed solution of tartaric acid and MXene to obtain the TA-MXene composite material with tartaric acid covalent coordination.
4. The method for producing a TA-MXene composite material for acetone detection according to claim 3, wherein in step 1, when hydrochloric acid and lithium fluoride are mixed, the mass ratio of hydrochloric acid to lithium fluoride is 1:14-1:16, and the mixing reaction time is 10-15 minutes.
5. The method for preparing the TA-MXene composite material for acetone detection according to claim 3, wherein in the step 2, when vanadium-aluminum carbide is added into the initial mixed solution, the mass ratio of the vanadium-aluminum carbide to hydrochloric acid is 1:23-1:27, and the etching reaction time is 144-148 hours.
6. The method for preparing a TA-MXene composite material for acetone detection according to claim 3, wherein in step 3, the specific steps of mixing tartaric acid and MXene with deionized water respectively and stirring them uniformly are: firstly, respectively placing tartaric acid and MXene with the mass ratio of 45:1-55:1 into independent deionized water, wherein the mass ratio of the tartaric acid to the deionized water is 1:2.8-1:3, and the mass ratio of the MXene to the deionized water is 1:48-1:50; then respectively mixing and stirring tartaric acid and MXene with the respective deionized water for 10-15 minutes; and finally, introducing nitrogen to seal and protect the uniformly stirred mixed solution, wherein the nitrogen introducing time is 5-10 minutes.
7. The method for preparing a TA-MXene composite material for acetone detection according to claim 6, wherein a magnetic stirrer is used for mixing and stirring when the TA-MXene composite material is mixed and stirred with deionized water, the stirring speed of the mixing and stirring is 300-400 r/min, and the temperature during stirring is 20-25 ℃.
8. The method for producing a TA-MXene composite for acetone detection according to claim 3, wherein in step 4, the heat-preserving heat treatment is performed at a temperature of 60-65 ℃ for 48-50 hours.
9. The method for producing a TA-MXene composite for acetone detection according to claim 3, wherein in step 4, the annealing temperature rise rate is 5-8 ℃ per minute, the highest annealing temperature is 200 ℃, the annealing time is 1-3 h, and finally the temperature is naturally lowered to room temperature.
10. The use of the TA-MXene composite material for acetone detection of claim 1, wherein the TA-MXene composite material is applied to a modified Au interdigital electrode to make a sensor for detecting acetone gas.

Description

TA-MXene composite material for acetone detection and preparation method and application thereof Technical Field The invention relates to the technical field of preparation of an MXene composite material, in particular to a TA-MXene composite material for acetone detection, a preparation method thereof and application of a modified electrode in detection of gaseous acetone. Background Acetone is a common toxic gas in industrial sites, and the content of acetone in exhaled breath of a human body is closely related to diseases, for example, the acetone is used as an important biomarker for detecting diabetes, and the concentration of the acetone in exhaled breath of a diabetic patient is more than twice that of a healthy person. The traditional detection means for the gas acetone at present has the defects of large equipment volume, complex detection procedure, high cost, easiness in interference and the like (such as GC-MS, LPAS and the like), and the small-sized acetone sensor prepared based on the metal oxide semiconductor is difficult to realize the long-term and low-energy consumption working requirements in daily life due to the fact that the working temperature is generally high (200-300 ℃). It is therefore important to design sensitive, simple, accurate and immediate sensing electrodes to achieve sensing and detection of gaseous acetone at room temperature. MXene is a material with p-type semiconductor characteristics, and the layered MXene nano-sheet has good conductivity similar to metal, meanwhile, the sheet structure improves the electron mobility and chemical property stability of the MXene nano-sheet, and has the advantages of high specific surface area, lower working temperature and the like, so that the MXene nano-sheet can play an important role in the fields of reaction catalysis, sensor manufacturing, energy storage and the like, and is one of the most potential materials at present. However, in practical application, the MXene material still has the defects of easy stacking and agglomeration of nano sheets, poor oxidation resistance and long-term stability, and the like, so that a proper modification method is required to be designed to prepare the composite material with high gas-sensitive performance to acetone. Tartaric Acid (TA) is used as a low-cost organic compound and can be combined with a reaction point of MXene in a covalent bond coordination mode to play a role in resisting oxidation and improving the stability of the material, and the tartaric acid can promote physical crosslinking in the MXene composite material to prevent the MXene from being decomposed due to the interference of water molecules, so that the material is one of ideal modified materials. Disclosure of Invention The invention aims to provide a TA-MXene composite material for acetone detection, a preparation method and application thereof, which can obtain a nano lamellar structure material with more active reaction sites, has a stable resistance value and better moisture resistance, and meets the detection performance of acetone gas. The technical scheme is that the TA-MXene composite material for acetone detection is a nano lamellar structure material composed of tartaric acid and nano lamellar MXene. Further, the thickness of the nano lamellar structure material is 10-15 nm, and the interlayer spacing is 20-50 nm. The invention also provides a preparation method of the TA-MXene composite material for acetone detection, which comprises the following steps: step 1, mixing hydrochloric acid and lithium fluoride, adding the mixture into a beaker for reaction, and heating and stirring the mixture to obtain an initial mixed solution; Step 2, adding vanadium aluminum carbide into the initial mixed solution for etching, and then sequentially carrying out centrifugal separation, ultrasonic cleaning and freeze drying treatment to obtain nano lamellar MXene; Step 3, respectively mixing tartaric acid and MXene with deionized water and uniformly stirring to obtain respective mixed solutions, and then mutually mixing and uniformly stirring the two mixed solutions to obtain the mixed solution of tartaric acid and MXene; and 4, sequentially performing heat-insulating heat treatment, centrifugal separation, ultrasonic washing, freeze drying and annealing treatment on the mixed solution of tartaric acid and MXene to obtain the TA-MXene composite material with tartaric acid covalent coordination. In step 1 of the preparation method, when hydrochloric acid and lithium fluoride are mixed, the mass ratio of the hydrochloric acid to the lithium fluoride is 1:14-1:16, and the mixing reaction time is 10-15 minutes. In step 2 of the preparation method, when the vanadium-aluminum carbide is added into the initial mixed solution, the mass ratio of the vanadium-aluminum carbide to the hydrochloric acid is 1:23-1:27, and the etching reaction time is 144-148 hours. Further, in the step 3 of the preparation method, the specific steps of resp