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An environmentally friendly tandem carbon nanotube-anatase composite catalyst and its preparation method and application

An environmentally friendly, composite catalyst technology, used in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problem that the photocatalytic activity cannot be greatly improved, and the surface transfer efficiency of electron holes is not high. problem, to achieve the effect of less pollution, convenient operation and good stability

Inactive Publication Date: 2016-09-07
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface transfer efficiency of electron holes is not high, which also prevents the photocatalytic activity from being greatly improved.

Method used

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  • An environmentally friendly tandem carbon nanotube-anatase composite catalyst and its preparation method and application
  • An environmentally friendly tandem carbon nanotube-anatase composite catalyst and its preparation method and application
  • An environmentally friendly tandem carbon nanotube-anatase composite catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 0.02g of carbon nanotubes, ultrasonically disperse them in 18mL of water, add 2mL of TiCl 3 (15wt%TiCl 3 aqueous solution) and 1mL of 1-methylimidazolium tetrafluoroborate ionic liquid, stirred evenly, and transferred to a microwave reaction kettle after stirring evenly. The heating time is 10min, the microwave power is 1200w, the initial pressure is 35bar, the reaction temperature is 150°C, and the reaction time is 30min, after cooling to room temperature. Wash to neutral with water, centrifuge and dry in vacuo.

[0022] figure 1 It is the XRD collection of illustrative plates of the environment-friendly type tandem structure carbon nanotube-anatase composite catalyst prepared in embodiment 1, and each diffraction peak among the figure and anatase phase TiO 2 and graphitized carbon one-to-one correspondence, indicating the presence of anatase phase TiO in the sample 2 and carbon nanotubes these two components, anatase phase TiO 2 The intensity of the (004) di...

Embodiment 2、3、4

[0027] The only difference from Example 1 is that the amount of carbon nanotubes used is different. Examples 2, 3, and 4 are 0.01g, 0.05g, and 0.08g respectively, and the obtained products have the same phase composition and similar microscopic appearance. As the amount of tube added increases gradually, the dispersion degree of anatase single crystal crossing becomes higher, and the activity of the sample obtained at 0.02 g is the highest.

Embodiment 5、6、7、8、9

[0029]The only difference from Example 1 is that the titanium source used is different. Embodiments 5, 6, 7, and 8 are respectively titanium tetrachloride, titanium tetrafluoride, tetrabutyl titanate, titanium oxysulfate and titanium isopropoxide, The obtained products have the same phase composition and similar structure, and the sample with titanium trichloride as the titanium source has the highest NO oxidation activity.

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Abstract

The invention discloses an environment-friendly series-structure carbon nanotube-anatase composite catalyst, as well as a preparation method and application thereof. By using a microwave ionic liquid-assisted synthesis method, water is taken as a solvent, fluorine-containing ionic liquid is taken as a structure-directing agent, titanium salt is taken as a titanium source and the carbon nanotube is taken as a series skeleton of a one-dimensional series structure, and thus the environment-friendly series-structure carbon nanotube-anatase composite catalyst is cleanly and quickly synthesized. The catalyst is capable of removing 83% of NO in reaction of photo-catalytic oxidation of NO through a flowing gas phase and showing excellent ultraviolet photo-catalytic activity. The preparation method of the catalyst is simple and is free of pollution to the environment in the preparation process; by virtue of a through structure and carbon nanotube electron conduction capability, the electron-hole pair separation efficiency is improved, and thus the catalytic activity of the type of materials is greatly improved. The environment-friendly series-structure carbon nanotube-anatase composite catalyst can be widely used in the fields of photo-catalytic oxidation of NO, photocatalytic decomposition of water into hydrogen, solar cells, antibiosis, photo-catalytic treatment on pollutants, and the like.

Description

technical field [0001] The invention relates to the technical field of photocatalysts, in particular to an environment-friendly series carbon nanotube-anatase composite catalyst and its preparation method and application. Background technique [0002] NO in the air x , SO x and NH 3 Acid-base neutralization forms ammonium salt aerosol particles, which become PM 2 . 5 main components of . Coal desulfurization treatment makes SO x be effectively controlled, but NO x Still not being dealt with effectively. Traditional treatment of NO x The methods include adsorption, biodegradation, catalytic reduction, decomposition and oxidation, etc., but there are defects such as difficult operation, high cost and secondary pollution. The photocatalytic oxidation of NO x Technology, through the electrons and holes excited by semiconductor light, and air and water to generate active species, NO x High-efficiency oxidation has many advantages such as mild reaction conditions and lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01D53/86B01D53/56
Inventor 张蝶青肖舒宁刘佩珏朱巍章姗姗温美成李和兴
Owner SHANGHAI NORMAL UNIVERSITY