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Preparation and application of a powder catalytic material, modified fly ash floating beads composite porous catalytic material

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

Active Publication Date: 2020-05-29
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 a powder catalytic material, modified fly ash floating beads composite porous catalytic material
  • Preparation and application of a powder catalytic material, modified fly ash floating beads composite porous catalytic material
  • Preparation and application of a powder catalytic material, modified fly ash floating beads composite porous catalytic material

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Embodiment 1～ Embodiment 4

[0069] Embodiment 1~Example 4 are YbInTiCrO 8 Preparation method of powder catalytic material

Embodiment 1

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

[0072] (1) According to Yb 2 o 3 、In 2 o 3 、TiO 2 and CrO 3 The mol ratio is 1:1:2:2, and the Yb with a purity of 99.99% is weighed respectively 2 o 3 、In 2 o 3 、TiO 2 and CrO 3 , and mixed evenly, and then added to a ball mill for grinding to obtain a powder with a particle size of 1.5 μm-3.0 μm.

[0073] (2) Take the above powder and dry it at 170°C-230°C for 2.5h-3.5h, press it into pieces, put it into a high-temperature sintering furnace for sintering, and the sintering process is as follows: first, raise the furnace temperature to 370°C- 430°C, keep warm for 3h-5h; then cool down with the furnace to get the first sintered pellet.

[0074] (3) Take the above-mentioned first sintered tablet and pulverize it to obtain a powder with a particle size of 1.5 μm-2.5 μm, and then press it into a tablet; ℃-820℃, keep warm for 7h-9h; then cool...

Embodiment 2

[0078] A preparation method of a powder catalytic material, comprising a self-propagating combustion method, 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, and 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 it in deionized water;

[0080] (b) Place the above mixed solution in a constant temperature magnetic stirrer, stir at 80°C, stop stirring when the solution evaporates to half, and transfer the solution to a crucible;

[0081] (c) Put the above-mentioned crucible in a muffle furnace, first raise the temperature to 200°C at a rate of 5°C / min, and keep it for 30 minutes; ;

[0082] (d) Heat the burned product to 800°C at a rate of 9.5°C / min, keep it warm for 120min, and then cool it down to 25°C naturally; after fully gri...

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Abstract

The invention discloses a powder catalyst that can catalyze the reaction of photodegradation of organic pollutants p-chloroaniline, methyl orange and benzotriazole in water. At the same time, a method for preparing a powder catalytic material is disclosed, including a solid-phase sintering method, a self-propagating combustion method, a high-temperature thermal decomposition method, and a method that combines an electrospinning method and a precipitation method. The invention also discloses a method for preparing modified fly ash drift beads composite porous catalytic material, and prepares YbInTiCrO 8 ‑Modified fly ash drift beads composite porous catalytic material can be used for photocatalytic removal of organic pollutants p-chloroaniline, methyl orange and benzotriazole in water.

Description

technical field [0001] The invention relates to the technical field of material chemistry, and more specifically relates 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 emerged in the past 20 years. It can usually completely mineralize organic matter into CO in sufficient reaction time. 2 and H 2 O and other simple inorganic substances avoid secondary pollution, are simple and efficient and have a promising future. The so-called photocatalytic reaction is a chemical reaction under the action of light. Photochemical reactions require molecules to absorb electromagnetic radiation of a specific wavelength, and are excited to generate molecular excited states, which then undergo chemical reactions to generate new substances, or become intermediate chemical products that trigger thermal r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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