Preparation and application of powder catalytic material and modified fly ash floating bead composite porous catalytic material

A technology of powder catalytic materials and fly ash floating beads, which is applied in the field of material chemistry and can solve problems affecting applications

Active Publication Date: 2018-04-10
NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the problem of catalyst separation and recovery in the photocatalytic oxidation method using titanium dioxide powder as a catalyst, the practical application of this technology is affected. Therefore, it is necessary to provide a new type of photocatalytic material to solve the problem of photocatalyst separation and recovery.

Method used

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  • Preparation and application of powder catalytic material and modified fly ash floating bead composite porous catalytic material
  • Preparation and application of powder catalytic material and modified fly ash floating bead composite porous catalytic material
  • Preparation and application of powder catalytic material and modified fly ash floating bead composite porous catalytic material

Examples

Experimental program
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Effect test

Embodiment 1～ Embodiment 4

[0069] Examples 1 to 4 are YbInTiCrO 8 Preparation method of powder catalytic material

Embodiment 1

[0071] A preparation method of powder catalytic material includes a solid phase sintering method, and the specific steps are:

[0072] (1) According to Yb 2 O 3 , In 2 O 3 , TiO 2 And CrO 3 The molar ratio of is 1:1:2:2, respectively weigh the Yb with a purity of 99.99% 2 O 3 , In 2 O 3 , TiO 2 And CrO 3 , And mix it evenly, and then add it to a ball mill to grind to obtain a powder with a particle size of 1.5μm-3.0μm.

[0073] (2) Take the above powder and dry it at 170℃-230℃ for 2.5h-3.5h, press it into a tablet, put it in a high-temperature sintering furnace, and sinter it. The sintering process is: first raise the furnace temperature to 370℃- Keep the temperature at 430°C for 3h-5h; then cool with the furnace to obtain the first sintered tablet.

[0074] (3) Take the above-mentioned first sintering tablet and crush it to obtain a powder with a particle size of 1.5μm-2.5μm, and then press it into a tablet; then put it into a high-temperature sintering furnace for sintering, the si...

Embodiment 2

[0078] A method for preparing powdered catalytic materials includes a self-propagating combustion method, and the specific steps are:

[0079] (a) According to Yb(NO 3 ) 3 ·5H 2 O, In(NO 3 ) 3 ·4.5H 2 O, Ti(NO 3 ) 4 And Cr(NO 3 ) 3 ·9H 2 The stoichiometric ratio of O is 1:1:1:1, glycine and Yb(NO 3 ) 3 ·5H 2 The molar ratio of O is 5:1. Weigh Yb(NO 3 ) 3 ·5H 2 O, In(NO 3 ) 3 ·4.5H 2 O, Ti(NO 3 ) 4 , Cr(NO 3 ) 3 ·9H 2 O and glycine, and dissolve them in deionized water;

[0080] (b) Place the above-mentioned mixed solution in a constant temperature magnetic stirrer and stir at 80°C. When the solution has evaporated to half, stop stirring and transfer the solution to a crucible;

[0081] (c) Put the above crucible in a muffle furnace, firstly heat up to 200°C at a rate of 5°C / min, and hold for 30 minutes; then heat up to 400°C at a rate of 2°C / min and hold for 60 minutes to make it self-propagating combustion ;

[0082] (d) Raise the burned product to 800°C at a rate of 9.5°C / min, hold ...

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Abstract

The invention discloses a powder catalyst which can catalyze a reaction of organic pollutants including p-chloroaniline, methyl orange and benzotriazole in photo-degradation water, and meanwhile discloses preparation methods of the powder catalyst. The preparation methods include a solid-phase sintering method, a self-propagating combustion method and a high-temperature thermal decomposition method, and further comprise a method combining an electrostatic spinning method and a precipitation method. The invention further discloses a preparation method of a modified fly ash floating bead composite porous catalytic material. The prepared YbInTiCrO8-modified fly ash floating bead composite porous catalytic material can be used for removing the organic pollutants including p-chloroaniline, methyl orange and benzotriazole in a water body through photocatalysis.

Description

Technical field [0001] The invention relates to the technical field of material chemistry, and more specifically to the preparation and application of a powder catalytic material and a modified fly ash floating bead composite porous catalytic material. Background technique [0002] Photocatalytic oxidation is a water treatment technology that has only appeared in the past 20 years. It can usually completely mineralize organic matter into CO within sufficient reaction time. 2 And H 2 Simple inorganic substances such as O, avoid secondary pollution, are simple, efficient, and promising. The so-called photocatalytic reaction is a chemical reaction carried out under the action of light. Photochemical reactions require molecules to absorb electromagnetic radiation of specific wavelengths and are excited to produce molecular excited states, and then chemical reactions will occur to generate new substances or become intermediate chemical products that initiate thermal reactions. The ac...

Claims

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Application Information

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IPC IPC(8): B01J23/26C02F1/30C02F1/32C02F1/72
CPCC02F1/30C02F1/32C02F1/725B01J23/002B01J23/26B01J37/031B01J37/08B01J37/342C02F2101/38C02F2101/36C02F2305/10B01J2523/00B01J35/39B01J35/50B01J2523/33B01J2523/3787B01J2523/47B01J2523/67
Inventor 栾景飞沈栎
Owner NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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