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Preparation method of honeycomb ceramic net through Lu and N co-doped TiO2 photocatalysis

A honeycomb ceramic and photocatalytic technology, which is applied in the field of preparation of lutetium/nitrogen co-doped TiO2 photocatalytic honeycomb ceramic mesh, can solve the problem of not involving the co-doping of rare earth elements Lu and N, and not involving the preparation of co-doped photocatalytic film Specific technology and other issues to achieve the effect of reducing photocatalytic cost, improving photocatalytic efficiency, and increasing load fastness

Active Publication Date: 2014-12-17
JIANGSU GAOCHUN CERAMICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the above technology involves TiO 2 Rare earth doping and nitrogen doping, but does not involve the co-doping of rare earth elements Lu and N, let alone the preparation of co-doped TiO 2 Specific technology of photocatalytic film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1 Prepare Lu and N co-doped TiO according to the above-mentioned embodiment 2 40 pieces of photocatalytic honeycomb ceramic mesh, the production conditions and various parameters measured by the sample are as follows:

[0041] Preparation of the first carrier honeycomb ceramic mesh: firstly mix Xingzi soil 40 (mass ratio, the same below), Langxi soil 29, Fengyang quartz 22, tung oil 4, glycerin 3, starch 2 and water 22, and mix at 21°C Refining to make the mud hardness 11HB, stale at 17°C for 24hrs, filter impurity particles with 150 mesh to form plastic mud, extrude through a die and cut into shape, and then dry the wet green body at 200°C for 0.5hr by radio frequency to obtain Dry body; then the dry body is heated in the tunnel kiln at a rate of 1 °C / min to 210 °C, at a rate of 5 °C / min to 800 °C, at a rate of 0.8 °C / min to 1200 °C, and Heat up to 1420°C at a rate of 0.9°C / min, keep it warm for 6 hours, and cool down to room temperature naturally to obtain a ...

Embodiment 2

[0045] Example 2 is the same as Example 1 except that the raw material ratio of the second carrier is different from Example 1. The raw material ratio of the second carrier is: lanthanum modified alumina (La-Al 2 o 3 ): Pseudoboehmite (AlOOH nH 2 O): cerium oxide zirconium powder (Ce and Zr oxides): Fe(NO 3 ) 3 9H 2 O: nitric acid: polyethylene glycol (PEG): deionized water = 20.8: 7.8: 6.4: 0.8: 1.0: 0.2: 66.3. Co-preparation of Lu and N co-doped TiO 2 40 pieces of photocatalytic honeycomb ceramic mesh, the measured parameters are as follows:

[0046] The size, pore density, pore shape and size of the first carrier are completely the same as in Example 1; the thickness of the second carrier is 21.4 μm; the SEM measurement shows that the surface of the photocatalytic film is smooth, the thickness of the film, the grain size and arrangement on the film, The results such as the absorption band that UV / Vis diffuse reflectance spectrometry obtains are all identical with emb...

Embodiment 3

[0047] Example 3 is the same as Example 1 except that the number of immersion-pulling times used in loading the photocatalytic film is reduced to 2 times compared with 5 times in Example 1 (in order to reduce the thickness of the film). The various parameters of the product are as follows:

[0048] The shape and size of the first carrier size, pore density, and holes are completely the same as in Example 1; the second carrier is compounded with Al 2 o 3 The thickness of the coating is 15.4 μm; SEM measurement shows that Lu and N co-doped TiO 2 The surface of the photocatalytic film is smooth, the thickness of the film is 300nm, the crystal grains on the film are about 20nm, and the particles are arranged neatly; the absorption bands and other results obtained by UV-Vis diffuse reflectance spectroscopy are exactly the same as those in Example 1; the photodegradation treatment of waste gas Test shows, the removal rate of formaldehyde is 96.4%, the removal rate of toluene is 89...

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Abstract

The invention relates to a preparation method of a honeycomb ceramic net through Lu and N co-doped TiO2 photocatalysis. The honeycomb ceramic net is regarded as a first carrier, and activity AL2O3 coating with specific surface area of 300 to 400m2 / g and doping with lanthanum, cerium and iron element is loaded on the first carrier and regarded as a second carrier; the mass ratio of AL2O3 to La to Ce to Fe is (100 to 110) to (90 to 115) to (50 to 70) to (5 to 15); the TiO2 photocatalyst films of rare earth element Lu and non-metallic element N are loaded on the second carrier; the mass ratio of Lu to N to TiO2 in the TiO2 photocatalyst film is (0.01 to 0.16) to (0.40 to 1.88) to (97.94 to 99.54). The removal rate of the honeycomb ceramic net prepared through photocatalysis to formaldehyde and toluene in the air is 98.7% and 92.2% respectively, and the removal rate to formaldehyde and toluene in the air is improved by 2.0 times and 1.9 time respectively compared with the application of the TiO2 photocatalyst film only.

Description

technical field [0001] The present invention relates to the preparation method of photocatalytic honeycomb ceramic network, especially a kind of lutetium / nitrogen co-doped TiO 2 Preparation method of photocatalytic honeycomb ceramic net. technical background [0002] with TiO 2 It is a new technology for pollution control to oxidize and degrade volatile organic compounds (VOCs) by using photocatalysis as a catalyst. The process does not require other chemical additives, the reaction conditions are mild, and the final product is usually only CO 2 and H 2 O, no secondary pollution. Most gas-phase organic pollutants can be rapidly decomposed by photocatalytic oxidation, including aliphatic hydrocarbons, alcohols, aldehydes, ketones, halogenated hydrocarbons, aromatics, mercaptans, and heteroatom organic compounds. This method is especially suitable for non-biodegradable or difficult-to-biodegrade Handling of toxic organic substances. [0003] TiO 2 Photocatalyst is curren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/72
Inventor 孔德双谷昌军孔令仁郭睿
Owner JIANGSU GAOCHUN CERAMICS
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