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Method for preparing porphyrin modified carbon nanotube-nano TiO2 photocatalyst

A carbon nanotube, photocatalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high cost, complex preparation method, etc. Strong absorption effect

Inactive Publication Date: 2005-09-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] So far, Pt-doped TiO 2 The absorption of visible light is the best, but in general, the method of doping metal is more expensive and the preparation method is more complicated

Method used

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  • Method for preparing porphyrin modified carbon nanotube-nano TiO2 photocatalyst
  • Method for preparing porphyrin modified carbon nanotube-nano TiO2 photocatalyst
  • Method for preparing porphyrin modified carbon nanotube-nano TiO2 photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh 6.8g of butyl titanate and dissolve it in 20mL of absolute ethanol, and record it as solution A; weigh 4.0g of glacial acetic acid in a beaker, add 4mL of deionized water and 20mL of absolute ethanol, and add 177mg of dispersed carbon nanotubes , mixed evenly, and this mixture is recorded as B; put solution A on a magnetic stirrer, and add mixture B dropwise under constant stirring, with a flow rate of 60mL / h. After the sol is formed, it is poured into a petri dish, and a gel is formed after half an hour, and the petri dish is tilted at 45° and the fluid does not flow. Place the gel at -10°C for 72h, dry it in a freeze dryer for 0.5h, put the dried gel into a box-type resistance furnace, calcinate it at 480°C for 10h, and grind it with an agate mortar. TiO with nanotube content 10% (wt) 2 sample,

Embodiment 2

[0029] Weigh 1.5gTiO 2 The sample is immersed in 40mL with a concentration of 2.0×10 -4 M zinc porphyrin solution, sealed and placed in a water bath shaker, controlled temperature 25 ° C, shaker speed 160r / h; after 48 hours, the above mixture was filtered and precipitated; the collected samples were dried in a lyophilizer for 0.5 h to get zinc porphyrin-modified TiO 2 sample.

Embodiment 3

[0031] Weigh 1.5g carbon nanotube-TiO 2 The composite sample was immersed in 40mL with a concentration of 2.0×10 -4 M zinc porphyrin solution, sealed and placed in a water bath shaker, controlled temperature 25 ° C, shaker speed 160r / h; after 48 hours, the above mixture was filtered and precipitated; the collected samples were dried in a lyophilizer for 0.5 h to obtain zinc porphyrin-modified carbon nanotubes-TiO 2 sample.

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Abstract

The invention discloses a preparation method of porphyrin decorating nanometer tube-nanometer TiO2 optical catalyst and belongs to nanometer optical catalyst preparation technology. The method includes the following procedure: dissolve TBT in ethanol to create solution A; mix HAC, ethanol, deionized water and carbon nanometer tube to form solution B; mix the solutions an and B to form sol and then the gel; the gel is put in minus 10 Deg. C and then in lyophilized machine to be dried; put the dry gel in the resistance furnace to burn, and use agate mortar to abrade to make TiO2 sample containing nanometer tube; dip the burned TiO2 sample in chloroform, methylbenzene or tetrahydrofuran solutions to absorb to get porphyrin decorating C nanometer tube TiO2. The strong points of the invention lie in: the preparation method is simple, the cost is low, and the optical material has high absorption performance in visible light range of 400-1100nm.

Description

technical field [0001] The present invention is a porphyrin-modified carbon nanotube-nano TiO 2 The invention relates to a preparation method of a photocatalyst, which belongs to the nanometer photocatalyst preparation technology. Background technique [0002] Today, when the serious energy crisis plagues all mankind, the effective use of light energy is undoubtedly an important topic in photocatalysis research. In current photocatalytic research, TiO 2 It is still a photocatalyst with the most application potential. It has stable chemical properties, no lame corrosion after exposure to light, good acid and alkali resistance, abundant sources, and the world's largest reserves and the most research. However TiO 2 Wide band gap (E g +3.2eV), can only be excited by ultraviolet light with a wavelength less than 387nm in sunlight, and the light energy in this range only accounts for about 8% of solar energy. Narrow bandgap semiconductor materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J37/06
Inventor 姜忠义吕陈秋吴洪汪群
Owner TIANJIN UNIV
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