Method for preparing multiwall carbon nanotube-supported titanium dioxide catalyst

A technology of multi-walled carbon nanotubes and supported catalysts, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of uneven TiO and achieve strong operability and simple methods. Effect

Inactive Publication Date: 2011-02-09
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For existing TiO 2 / TiO exists in the preparation method of CNT 2 The shortcoming that can not be evenly loaded on the surface of CNT, the invention provides a kind of preparation method of multi-walled carbon nanotube loaded titanium dioxide catalyst, at first adopt the high temperature and high pressure process under solvothermal to make titanium sulfate (the complex compound containing titanium sulfate and methanol ) is more evenly loaded on the surface of multi-walled carbon nanotubes (MWCNT), and then through hydrothermal reaction to hydrolyze titanium sulfate (containing complexes of titanium sulfate and methanol) into TiO 2 , thus achieving TiO 2 Selective loading on MWCNT surface

Method used

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  • Method for preparing multiwall carbon nanotube-supported titanium dioxide catalyst
  • Method for preparing multiwall carbon nanotube-supported titanium dioxide catalyst
  • Method for preparing multiwall carbon nanotube-supported titanium dioxide catalyst

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Embodiment 1

[0037] A) Ultrasonic dispersion: 0.1g of MWCNT (multi-walled carbon nanotubes, MWCNT; purchased from Nanotech Port Co, Shenzhen, Guangdong Province) and 0.6g of titanium sulfate were used as raw materials, respectively added to 20ml of methanol, and ultrasonically dispersed for 30min; Mix the above two solutions, and disperse by ultrasonic for 30min and magnetic stirring for 30min again at 35°C;

[0038] B) Solvothermal reaction: transfer the solution obtained in step A into a polytetrafluoroethylene tank and seal it, and then adopt a solvothermal method to prepare the loaded nanocomposite. The specific solvothermal conditions are as follows: from 35°C to 150°C, the heating rate is 1.0-2.0°C / min, then stored at 150°C for 5 hours, and then cooled to room temperature at a rate of 0.5-1.5°C / min;

[0039] C) Catalyst washing: in the sand core funnel connected to the vacuum pump, the mixed solution obtained in step B was repeatedly washed with secondary deionized water for 1 hour t...

Embodiment 2

[0042] A) Ultrasonic dispersion: Take 0.1g P25 and 0.6g CNT as raw materials, add them to 20ml of water respectively, and after 30min ultrasonic dispersion, mix the above two solutions; ultrasonically disperse again at 35°C for 30min, and disperse by magnetic stirring for 30min;

[0043] B) Hydrothermal reaction: The solution obtained in step A is transferred into a polytetrafluoroethylene tank and sealed, and then the loaded nanocomposite is prepared by a hydrothermal method. The specific hydrothermal conditions are as follows: from 35°C to 150°C, the heating rate is 1.0-2.0°C / min, then stored at 150°C for 5 hours, and then cooled to room temperature at a rate of 0.5-1.5°C / min;

[0044] C) catalyst washing: in the sand core funnel connected to the vacuum pump, the mixed solution obtained in step B was repeatedly washed with secondary deionized water for 1 hour to remove various residual impurities, and then vacuum-dried for 12 hours to obtain the supported catalyst; Finally, ...

Embodiment 3

[0047] A) Ultrasonic dispersion: 0.1g of attapulgite and 0.6g of titanium sulfate were used as raw materials, respectively added to 20ml of water, and ultrasonically dispersed for 30min; the above two solutions were mixed, ultrasonically dispersed for 30min again at 35°C, and magnetically dispersed for 30min. stirring and dispersing;

[0048] B) Hydrothermal reaction: The solution obtained in step A is transferred into a polytetrafluoroethylene tank and sealed, and then the loaded nanocomposite is prepared by a hydrothermal method. The specific hydrothermal conditions are as follows: from 35°C to 150°C, the heating rate is 1.0-2.0°C / min, then after being stored at 150°C for 5 hours, the temperature is lowered to room temperature at a rate of 0.5-1.5°C / min;

[0049] C) Catalyst washing: in a sand core funnel connected to a vacuum pump, the mixed solution obtained in step B was repeatedly washed with secondary deionized water for 1 hour to remove various residual impurities, and...

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Abstract

The invention discloses a method for preparing a multiwall carbon nanotube-supported titanium dioxide catalyst, which belongs to the field of photochemical catalyst materials. The method comprises the following steps: adding multiwall carbon nanotubes and titanium sulfate into methanol respectively, and dispersing by ultrasonic waves and magnetic stirring; performing a solvothermal reaction, namely preparing a nano composite material by a solvothermal process to obtain the multiwall carbon nanotube-supported titanium dioxide catalyst; repeatedly washing the multiwall carbon nanotube-supported titanium dioxide catalyst, and drying under vacuum to obtain supported catalyst solid powder; dispersing the solid powder by ultrasonic waves and magnetic stirring, and preparing TiO2/MWCNT by a hydrothermal process; and repeatedly washing the obtained TiO2/MWCNT to obtain the multiwall carbon nanotube-supported titanium dioxide catalyst. In the TiO2/CNT prepared by the method, the TiO2 is selectively and uniformly loaded on the surface of CNT. The method combining the solvothermal and hydrothermal processes has the advantages of simplicity, high maneuverability and the like.

Description

technical field [0001] The present invention relates to the preparation method of nanoscale composite photocatalyst material, specifically, refers to multi-walled carbon nanotube supported titanium dioxide catalyst (Ti0 2 / MWCNT) preparation method. Background technique [0002] In 1985, Professor Kroto, a spectrographer at the University of Sussex in the United Kingdom, and Professors Smalley and Curl at Rice University in the United States discovered that carbon elements can form a highly symmetrical cage structure composed of 60 or 70 carbon atoms. C60 and C70 molecules, namely: Buckyballs (Buckyballs). In the early 1990s, Japanese electron microscopy expert Iijima first reported multi-walled carbon nanotubes (MWCNT; Nature, 1991, 354, 56-58) and single-walled carbon nanotubes (SWCNT; Nature, 1993, 363, 603-605) in Nature. , which set off another research climax after C60. As a special low-dimensional material prepared artificially, carbon nanotubes (CNTs) exhibit many...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J21/06B01J37/08
Inventor 鞠勇明方建德林必桂吴英海张雨葵
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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