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Method and product of in-situ synthetic TiO2@Ti3C2 by using isopropylamine intercalated and layered Ti3C2

A technology of in-situ synthesis and isopropylamine, which is applied in the field of Ti3C2 preparation, can solve the problems of small band gap, reduced electron-hole recombination, and poor catalytic performance, so as to increase interlayer spacing, improve purity and crystallinity, and benefit The effect of catalytic degradation

Inactive Publication Date: 2019-01-25
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 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 dioxide through oxidation reaction, and a new nanomaterial TiO can be obtained. 2 @Ti 3 C 2 , due to Ti 3 C 2 The Fermi energy level of titanium dioxide is more negative than that of titanium dioxide, and the forbidden band width is smaller than that of titanium dioxide. When it is illuminated by the corresponding wavelength, it can be used as a hole acceptor, which greatly reduces the recombination of electrons and holes, and greatly improves the catalytic performance.

Method used

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  • Method and product of in-situ synthetic TiO2@Ti3C2 by using isopropylamine intercalated and layered Ti3C2
  • Method and product of in-situ synthetic TiO2@Ti3C2 by using isopropylamine intercalated and layered Ti3C2
  • Method and product of in-situ synthetic TiO2@Ti3C2 by using isopropylamine intercalated and layered Ti3C2

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 of HF solution with a mass concentration of 49%, and reacted for 36h in a magnetic stirrer at 50°C in an oil bath;

[0049] 2) After the reaction, centrifuge the resulting solution at 3000 rpm for 5 minutes, pour out the supernatant, and wash the precipitate with deionized water, shake and shake well, then centrifuge under the same conditions, and repeat 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 repeated twice with the same speed and time of centrifugation. After centrifugation, the resulting solution was suction filtered to obtain a precipitate. The resulting precipitate was vacuum dried at 60°C for 24h to obtain Mxene-Ti 3 C 2 material;

[0050] 3) The Mxene-Ti obtained in step 2) 3 C 2 The materials, isopropylamine and deionized water are mixed according to the feed ratio of 1g:20...

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 procedure is over, natural cooling is used. 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 hour. After the program ends, natural cooling is used. 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 and product of in-situ synthetic TiO2@Ti3C2 by using isopropylamine intercalated and layered Ti3C2. The synthetic method comprises the following steps: 1) enabling Ti3AlC2-MAX-phase ceramic powder to be dispersed in HF solution for etching, to obtain Mxene-Ti3C2; 2) enabling the Mxene-Ti3C2 to be dispersed in mixed liquid of isopropylamine and water for performingisopropylamine intercalation, to obtain isopropylamine intercalated Ti3C2; 3) enabling the isopropylamine intercalated Ti3C2 to be dispersed in the water, performing ultrasonic treatment in an argonatmosphere, after drying, to obtain isopropylamine intercalated and layered Ti3C2; and 4) performing in-situ oxidation on the isopropylamine intercalated and layered Ti3C2 in an oxygen condition, to obtain TiO2@Ti3C2. The method is capable of improving an interlayer spacing distance of the Mxene-Ti3C2 by using the isopropylamine and the ultrasonic treatment, providing more attachment sites for thegenerated TiO2, and more advantageously performing catalytic degradation on a pollutant.

Description

Technical field [0001] This invention relates to Ti 3 C 2 The field of preparation, specifically relates to a Ti with intercalation and delamination using isopropylamine 3 C 2 In-situ synthesis of TiO 2 @Ti 3 C 2 The method and product. Background technique [0002] Since the two-dimensional nanomaterial graphene was successfully exfoliated from graphite in 2004, due to its very good various properties, graphene has been in-depth research in various fields, which has also caused people to study two-dimensional nanomaterials upsurge. [0003] In 2011, Professor Yury Gogotsi and Professor Michel W. Barsoum of Drexel University in the United States jointly discovered a new type of two-dimensional nanomaterial-two-dimensional transition metal carbide or carbonitride. It has a similar layered structure to graphene, has good electrical conductivity and strong charge storage capacity, and has good application prospects in Li batteries. [0004] Due to its excellent photochemical propertie...

Claims

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Application Information

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IPC IPC(8): B01J27/22
CPCB01J27/22
Inventor 林道辉柯涛
Owner ZHEJIANG UNIV
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