Method for in-situ synthesis of BiOI composite catalyst and product

A composite catalyst, in-situ synthesis technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor interface effect, low electron-hole separation rate, etc. Purity and crystallinity, beneficial effect on catalytic degradation

Inactive Publication Date: 2020-02-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are usually only combined by weak van der Waals force, resulting in poor interface effect and low electron-hole separation rate.

Method used

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  • Method for in-situ synthesis of BiOI composite catalyst and product
  • Method for in-situ synthesis of BiOI composite catalyst and product
  • Method for in-situ synthesis of BiOI composite catalyst and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) 15g Ti 3 AlC 2 The -MAX phase ceramic powder was slowly added into 300 mL of HF solution with a mass concentration of 49%, and reacted with a magnetic stirrer for 36 hours under the condition of an oil bath at 50°C.

[0042] 2) After the reaction, wash the precipitate by centrifugation with deionized water until the pH of the supernatant is between 5 and 6, then wash the precipitate by centrifugation twice with absolute ethanol, and then vacuum-dry the obtained precipitate at 60°C for 24 hours , get Mxene-Ti 3 C 2 Material;

[0043] 3) the Mxene-Ti obtained in step 2) 3 C 2 Material, NaBF 4 Mix with hydrochloric acid according to the feed ratio of 0.5g:0.83g:80ml, magnetic stirring reaction at room temperature for 1h, then transfer to a high-temperature and high-pressure reactor, and react in a muffle furnace at 160°C for 12h. After the reaction, use ion and ethanol were washed 3 times, and then the resulting precipitate was vacuum-dried at 60 °C for 12 h to o...

Embodiment 2

[0047] The preparation process refers to the process in Example 1, the difference is that (001) TiO 2 @Ti 3 C 2 The dosage is 0.004g. After the reaction is completed, the BiOI@(001)TiO 2 @Ti 3 C 2 Material.

Embodiment 3

[0049] The preparation process refers to the process in Example 1, the difference is that (001) TiO 2 @Ti 3 C 2 The dosage is 0.008g. After the reaction is completed, the BiOI@(001)TiO 2 @Ti 3 C 2 Material.

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Abstract

The invention relates to a method for in-situ synthesis of a BiOI composite catalyst and a product. The BiOI composite catalyst is BiOI@(001)TiO2@Ti3C2, and the method comprises the following steps: (1) dispersing Ti3AlC2-MAX phase ceramic powder into an HF solution for etching to obtain Mxene-Ti3C2; 2) dispersing Mxene-Ti3C2 in a hydrochloric acid solution containing NaBF4, and carrying out magnetic stirring to obtain a mixed solution; 3) pouring the mixed solution into a high-temperature and high-pressure reaction kettle, reacting in a muffle furnace, and centrifugally washing with deionizedwater and absolute ethyl alcohol to obtain (001)TiO2@Ti3C2; 4) dispersing and dissolving a certain amount of (001)TiO2@Ti3C2 and Bi(NO<3>)<3>*5H<2>O in an ethylene glycol solution, magnetically stirring for a period of time, and dropwise adding an ethylene glycol solution containing KI to obtain a mixed solution; and 5) pouring the obtained mixed solution into a high-temperature high-pressure reaction kettle, reacting in a muffle furnace, centrifugally washing with deionized water and absolute ethyl alcohol, and drying to obtain BiOI@(001)TiO2@Ti3C2. According to the method, heterojunction isformed by utilizing (001)TiO2@Ti3C2 and BiOI, so that electron holes generated by BiOI are separated more efficiently, and catalytic degradation on pollutants is facilitated.

Description

technical field [0001] The invention relates to the field of preparation of BiOI composite catalysts, in particular to an in-situ synthesis of BiOI composite catalysts (BiOI@(001)TiO 2 @Ti 3 C 2 ) methods and products. Background technique [0002] Mxenes-two-dimensional transition metal carbides or carbonitrides were discovered in 2011 by Professor Yury Gogotsi and Professor Michel W.Barsoum of Drexel University in the United States. Ti 3 C 2 Due to its unique properties, it is currently the most studied in this family and is widely used in energy storage. [0003] Ti 3 C 2 It contains titanium itself. Many scholars have found that it does not have catalytic performance, but after hydrothermal or calcination, the titanium on its surface can be oxidized into titanium dioxide, and a new nanomaterial TiO can be obtained. 2 @Ti 3 C 2 . In addition, the reacted solution was changed to hydrochloric acid and NaBF was added 4 , can generate highly active 001 facet TiO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J27/06B01J21/06C02F1/30
CPCB01J21/063B01J27/06B01J27/22B01J35/004C02F1/30C02F2101/308C02F2305/10
Inventor 林道辉柯涛
Owner ZHEJIANG UNIV
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