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Preparation method and application of a carbon dot-doped titanium carbide hydrogel composite material

A technology of composite materials and titanium carbide, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of easy stacking of sheet structures, smaller spacing, and reduced proton transport capacity, etc., to achieve proton transport capacity, The effect of high conductivity and large layer spacing

Active Publication Date: 2020-04-10
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sheet structure of MXenes is easy to stack during long-term storage, resulting in smaller interlayer spacing, resulting in reduced proton transport capacity.

Method used

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  • Preparation method and application of a carbon dot-doped titanium carbide hydrogel composite material
  • Preparation method and application of a carbon dot-doped titanium carbide hydrogel composite material
  • Preparation method and application of a carbon dot-doped titanium carbide hydrogel composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Ti 3 C 2 Preparation of TxMXenes Hydrosol

[0046] By selective etching of 1 g of Ti in 10 mL of 4°C hydrofluoric acid (AR (Shanghai test), ≥40.0%) 3 AlC 2 (Changchun Hello Micro-Nano Technology Co., Ltd.) MAX Phase Ti 3 AlC 2 Al layer in 15 min, then stirred at 45 °C for 24 h to synthesize Ti 3 C 2 . Then the suspension of the obtained material was washed with distilled water, washed by centrifugation at 3500 rpm for 5 minutes, and the supernatant was decanted and dried under vacuum at 35°C for 18 hours, and 0.3 g of the solid material was dispersed in 150 mL of distilled water and ultrasonicated for 10 hours to obtain complete stratification (such as figure 2 TEM image of MXenes in the composite hydrosol Ti 3 C 2 Tx MXenes.

[0047] cQDs / Ti 3 C 2 Preparation of Tx Hydrosol Composites

[0048] The prepared Ti 3 C 2 Colloidal solution of Tx MXenes with 10 mL of 1 mol -1 Nitric acid was mixed with ultrasonic for 5 hours for surface nitration treatment. ...

Embodiment 2

[0061] The preparation method is the same as in Example 1, except that:

[0062] Pd NPs / cQDs / Ti 3 C 2 Preparation of Tx Hydrogel Composites

[0063] 1g cQDs / Ti 3 C 2 The Tx sample was ultrasonically dispersed in 5mL of 0.0001M sodium chloropalladate aqueous solution, the pH value of the mixture was adjusted to 7.00 with sodium hydroxide, 2mL of NaBH reducing agent with a mass fraction of 1% was added, and stirred for a set time of 30min. MXenes composite Pd NPs / cQDs / Ti loaded with noble metal nanoparticles in layers 3 C 2 Tx.

Embodiment 3

[0065] The preparation method is the same as in Example 1, except that:

[0066] PtRu NPs / cQDs / Ti 3 C 2 Preparation of Tx Hydrogel Composites

[0067] 1g cQDs / Ti 3 C 2 The Tx sample was ultrasonically dispersed in 5mL of 0.0001M mixed aqueous solution of chloroplatinic acid and ruthenium chloride, the pH value of the mixture was adjusted to 7.0 with sodium hydroxide, 2mL of NaBH reducing agent with a mass fraction of 1% was added, and the stirring time was 40min. MXenes hydrogel composites PtRu NPs / cQDs / Ti loaded with noble metal nanoparticles PtNPs and Ru NPs in layers were prepared after washing 3 C 2 Tx.

[0068] The characterization results of Examples 2 to 3 are the same as those of Example 1.

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Abstract

The invention discloses a preparation method and application of a carbon dot-doped titanium carbide hydrogel composite material. The preparation method comprises the following steps: adding nitric acid into a colloidal solution of Ti3C2TxMXenes and enabling the surface of the Ti3C2TxMXenes to be nitrated; adding carbon quantum dots into the colloidal solution and then enabling the carbon quantum dots to be immobilized between lamella surface and lamella of the Ti3C2TxMXenes, thus obtaining a cQDs / Ti3C2Tx precursor material; adding 1-cetyl-3-methylimidazole halide into the cQDs / Ti3C2Tx precursor material and preparing a three-dimensional conductive hydrogel composite material by using a hydrothermal synthesis method, namely the carbon dot-doped titanium carbide hydrogel composite material.The carbon dot-doped titanium carbide hydrogel composite material has the advantages that the conductive ability is improved, the stacking of the lamellas can be prevented so as to obtain greater interlayer spacing, and the proton transmission ability is favorably improved.

Description

technical field [0001] The invention relates to a preparation method and application of a carbon dot-doped titanium carbide hydrogel composite material. Background technique [0002] A fuel cell is an environmentally friendly power generation device with higher power generation efficiency than other batteries, and can also convert chemical energy into electrical energy. A direct methanol fuel cell is a type of proton exchange membrane cell that does not require first reformation and can use methanol directly. At the anode, methanol is oxidized to form H 2 O, CO 2 and electrons, which are similar to standard proton exchange membrane batteries, where protons pass through the membrane, unlike O 2 In a cathodic reaction, electrons pass from the anode through the cathode (through an external circuit) and are discharged. Direct methanol fuel cells (DMFCs) have the advantages of small mass, easy transportation and storage, small space occupation, and more energy released from c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/86H01M4/90
CPCH01M4/362H01M4/8647H01M4/9083Y02E60/10Y02E60/50
Inventor 王宗花邹慧燕张菲菲范玉
Owner QINGDAO UNIV