Intercalation and layered ti using hydrazine hydrate 3 c 2 in situ synthesis of tio 2 @ti 3 c 2 method and product

A technology of in-situ synthesis and hydrazine hydrate, which is applied in the direction of chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problems of poor catalytic performance, increase interlayer distance, facilitate catalytic degradation, improve Effect of Purity and Crystallinity

Active Publication Date: 2021-02-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to bulk Mxene-Ti 3 C 2 The layer spacing is relatively small, Ti 3 C 2 Only limited TiO on the surface after heat treatment 2 resulting in poor catalytic performance

Method used

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  • Intercalation and layered ti using hydrazine hydrate <sub>3</sub> c <sub>2</sub> in situ synthesis of tio <sub>2</sub> @ti <sub>3</sub> c <sub>2</sub> method and product
  • Intercalation and layered ti using hydrazine hydrate <sub>3</sub> c <sub>2</sub> in situ synthesis of tio <sub>2</sub> @ti <sub>3</sub> c <sub>2</sub> method and product
  • Intercalation and layered ti using hydrazine hydrate <sub>3</sub> c <sub>2</sub> in situ synthesis of tio <sub>2</sub> @ti <sub>3</sub> c <sub>2</sub> method and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) 15g Ti 3 AlC 2 -MAX phase ceramic powder was slowly added to 300mL HF solution with a mass concentration of 49%, and reacted for 36h under the condition of an oil bath at 50°C in a magnetic stirrer;

[0049] 2) After the reaction, the obtained solution was centrifuged at 3000 rpm for 5 minutes, the supernatant was poured out, and the precipitate was washed with deionized water, shaken and then centrifuged under the same conditions, repeated 6 times. The pH of the final supernatant was measured to be between 5 and 6, and then the precipitate was washed with absolute ethanol, centrifuged after shaking, and kept at the same speed and centrifugation time, repeated twice, and after centrifugation, the resulting solution was suction filtered to obtain a precipitate, and the The resulting precipitate was vacuum dried at 60°C for 24 hours to obtain Mxene-Ti 3 C 2 Material;

[0050] 3) the Mxene-Ti obtained in step 2) 3 C 2 The material and hydrazine hydrate were mixed ...

Embodiment 2

[0054] The preparation process refers to the process in Example 1. The difference is that the final temperature maintained in step 5) is 320° C. for 1 hour. After the program ends, natural cooling is adopted. When the temperature drops to room temperature, the sample is taken out to obtain TiO 2 @Ti 3 C 2 Material.

Embodiment 3

[0056] The preparation process refers to the process in Example 1. The difference is that the final temperature maintained in step 5) is 340 ° C for 1 h. After the program ends, natural cooling is adopted. When the temperature drops to room temperature, the sample is taken out to obtain TiO 2 @Ti 3 C 2 Material.

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Abstract

The invention relates to a method for in situ synthesis of TiO2@Ti3C2 through the intercalation and layering of hydrazine hydrate and a product. The synthetic method comprises the following steps: (1)dispersing Ti3AlC2-MAX-phase ceramic powder into an HF solution, and etching, so as to obtain Mxene-Ti3C2; (2) dispersing Mxene-Ti3C2 into hydrazine hydrate, carrying out hydrazine hydrate intercalation, so as to obtain hydrazine hydrate intercalated Ti3C2; (3) dispersing hydrazine hydrate intercalated Ti3C2 into water, carrying out ultrasonic treatment in an argon atmosphere, and drying, so as to obtain hydrazine hydrate intercalated and layered Ti3C2; and (4) carrying out in situ oxidation on hydrazine hydrate intercalated and layered Ti3C2, so as to obtain TiO2@Ti3C2. According to the method, the interlayer spacing of Mxene-Ti3C2 is increased through hydrazine hydrate and ultrasonic treatment, so that more attachment sites are provided for generated TiO2, and the catalytic degradationof pollutants is promoted.

Description

technical field [0001] The present invention relates to Ti 3 C 2 The field of preparation, specifically related to a Ti 3 C 2 In situ synthesis of TiO 2 @Ti 3 C 2 methods and products. Background technique [0002] Mxenes two-dimensional material was developed by Yury Gogotsi and Michael W. Barsoum of Drexel University in 2011 by etching MAX compounds (such as Ti 3 AlC 2 etc.) for the first time. Two-dimensional nano-Ti 3 C 2 It is the most common material in the Mxenes family of new graphene-like two-dimensional nanomaterials. It has excellent electrical and thermal conductivity, good chemical stability and electrochemical activity. It is used in lithium-ion batteries, supercapacitors, biosensors and gas detection. fields have shown good application potential. [0003] Ti 3 C 2 It itself contains titanium element, many scholars try to find that Ti 3 C 2 The catalytic performance is very poor, but the titanium on the surface can be oxidized to titanium dioxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/22
CPCB01J27/22B01J35/004
Inventor 林道辉柯涛
Owner ZHEJIANG UNIV
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