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N-doped nano TiO2/pumice stone composite material and preparation method thereof

A composite material, pumice technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of unsatisfactory photocatalytic performance of materials, high price of carrier materials, and high preparation costs, etc. problem, to achieve excellent photocatalytic effect, improve photocatalytic performance, and low cost.

Inactive Publication Date: 2018-10-02
JILIN LYUSENLIN ENVIRONMENTAL PROTECTION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, commonly used carrier materials include activated carbon, carbon nanotubes, zeolites, etc., but the price of these carrier materials is relatively high, resulting in the 2 Material preparation costs remain high
Moreover, the existing supported TiO 2 The photocatalytic performance of the material is also unsatisfactory

Method used

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Examples

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preparation example Construction

[0024] The invention provides an N-doped nano-TiO 2 / The preparation method of pumice composite material, comprises the following steps:

[0025] a) mixing pumice stone, titanium source, nitrogen source, acid and solvent to obtain a mixed slurry; the pH value of the mixed slurry is ≤3;

[0026] b) adjusting the pH value of the mixed slurry to 5-6, and aging to obtain a solid aged product;

[0027] c) Calcining the solid aged product to obtain N-doped nano-TiO 2 / Pumice Composite.

[0028] In the preparation method provided by the invention, firstly, pumice, titanium source, nitrogen source, acid and solvent are mixed to obtain a mixed slurry. Wherein, the pumice is preferably pumice powder, and the particle size of the pumice powder is preferably 200-300 mesh; the titanium source includes but is not limited to one of titanium tetrachloride, titanium oxytitanium sulfate and n-butyl titanate or how much; the nitrogen source includes but not limited to one or more of ammoniu...

Embodiment 1

[0036] Preparation of composite materials:

[0037]Stir and mix water and pumice powder evenly at a mass ratio of 20:1, adjust the pH value to 1.5 with hydrochloric acid, lower the temperature of the slurry to 5°C, add titanium tetrachloride solution and ammonium sulfate solution, and the pH of the slurry at this time is about 1.5; Afterwards, the temperature of the slurry was raised to 20°C, and ammonium carbonate solution was added to adjust the pH value to 5, and aged at 40°C for 2.0 hours; the slurry was filtered, washed, dried, and calcined at 600°C for 4 hours to obtain N-doped nano-TiO 2 / Pumice Composite.

[0038] In the present embodiment, the particle diameter of pumice powder is 200~300 order, porosity 70~85%, the concentration of hydrochloric acid is 12mol / L the concentration of titanium tetrachloride solution is 3mol / L, the concentration of ammonium sulfate solution is 2mol / L, the concentration of ammonium carbonate solution is 2mol / L, and the mass ratio of pumi...

Embodiment 2

[0041] Preparation of composite materials:

[0042] Stir and mix water and pumice powder evenly at a mass ratio of 15:1, adjust the pH value to 2 with hydrochloric acid, lower the temperature of the slurry to 5°C, add titanium tetrachloride solution and ammonium sulfate solution, and the pH of the slurry at this time is about 2; Afterwards, the slurry was heated to 20°C, ammonium carbonate solution was added to adjust the pH value to 5, and aged at 35°C for 2.0 hours; the slurry was filtered, washed, dried, and calcined at 550°C for 5 hours to obtain N-doped nano-TiO2 / pumice composite material.

[0043] In the present embodiment, the particle diameter of pumice powder is 200~300 orders, porosity is 70~85%, the concentration of hydrochloric acid is 12mol / L, the concentration of titanium tetrachloride solution is 3mol / L and the concentration of ammonium sulfate solution is 2mol / L, the concentration of ammonium carbonate solution is 2mol / L, and the mass ratio of pumice powder, ti...

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Abstract

The invention belongs to the field of catalysis materials and particularly relates to an N-doped nano TiO2 / pumice stone composite material and a preparation method thereof. The N-doped nano TiO2 / pumice stone composite material provided by the invention comprises pumice stone and N-doped nano TiO2 particles carried by the pumice stone. According to the material, the pumice stone is adopted as a carrier material, and meanwhile nano TiO2 is doped with N, so that the photocatalytic performance of the composite material is remarkably improved. In addition, since the pumice stone is wide and easy toobtain and low in cost, the production cost of a product can be greatly reduced. Tests on the composite material provided by the invention show that the composite material has an excellent photocatalytic effect; at an ambient temperature of 20 DEG C or lower, and with ultraviolet light radiation, the photocatalytic degradation rate of the composite material upon a substrate rhodamine B is up to 90% or greater; with incandescent light radiation, the photocatalytic degradation rate of the composite material upon the substrate rhodamine B is up to 65% or greater.

Description

technical field [0001] The invention belongs to the field of catalytic materials, in particular to a kind of N-doped nano-TiO 2 / Pumice composite material and preparation method thereof. Background technique [0002] Nano-TiO 2 Due to its non-toxic, cheap, stable, abundant sources, mild reaction conditions, and good photocatalytic removal effect on organic compounds, it has become the most potential green and environmentally friendly photocatalytic material with broad application prospects. But nano TiO 2 There are problems such as easy reunion and difficulty in recycling. [0003] Numerous studies have shown that nano-TiO 2 Loaded on a suitable carrier material to make supported TiO 2 Materials capable of resolving nano-TiO 2 Easy to reunite and difficult to recycle. At present, commonly used carrier materials include activated carbon, carbon nanotubes, zeolites, etc., but the price of these carrier materials is relatively high, resulting in the 2 The cost of mater...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/00B01J37/03B01J37/08
CPCB01J27/24B01J37/038B01J37/08B01J35/393B01J35/39
Inventor 刘辉马文凯
Owner JILIN LYUSENLIN ENVIRONMENTAL PROTECTION SCI & TECH CO LTD
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