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Preparation and application of a powder catalytic material, thin film catalytic material, composite nano catalytic material

A technology of powder catalytic materials and nano catalytic materials, which is used in catalyst activation/preparation, chemical elements of heterogeneous catalysts, special compound water treatment, etc.

Active Publication Date: 2020-04-17
NANJING UNIVERSTIY SUZHOU HIGH TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although single-phase semiconductor photocatalysts, such as BiVO 4 、 Bi 2 MoO 6 , CdS, g-C 3 N 4 、Ag 3 PO 4 and CeO 2 A single photocatalyst has been studied in depth and breadth, and has a good photoresponse to visible light, but it still has certain limitations in practical application.
A single semiconductor photocatalyst can no longer meet the needs of its application, and people's requirements and research on composite photocatalysts are also increasing day by day

Method used

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  • Preparation and application of a powder catalytic material, thin film catalytic material, composite nano catalytic material
  • Preparation and application of a powder catalytic material, thin film catalytic material, composite nano catalytic material
  • Preparation and application of a powder catalytic material, thin film catalytic material, composite nano catalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Preparation of DyNdSnMoO by Microemulsion System Hydrothermal Method 8 Powder catalytic material, comprising the following steps:

[0055] (1) Configure 0.2mol / L Dy(NO 3 ) 3 , Nd(NO 3 ) 3 , SnCl 4 , (NH 4 ) 6 Mo 7 o 24 The solution is ready for use.

[0056] (2) (2.1) Weigh 25mL of the solution obtained in step (1) and mix under the condition of magnetic stirring, then add 0.5mol of cetyltrimethylammonium bromide and stir, and under the condition of stirring, add iso propanol until cetyltrimethylammonium bromide is completely dissolved to obtain a mixed solution;

[0057] (2.2) add 3.00g urea in the mixed solution of step (2.1), continue to stir until urea dissolves completely, obtain microemulsion;

[0058] (3) Add the microemulsion prepared in step (2.2) into a reaction kettle filled with polytetrafluoroethylene, seal it, put it in an oven at 160° C. for 24 hours, and cool it naturally to room temperature;

[0059] (4) Wash the product obtained in step (3)...

Embodiment 2

[0061] Preparation of DyNdSnMoO by solid-state sintering 8 Powder catalytic material, comprising the following steps:

[0062] (1) Select Dy with a purity of 99.99% 2 o 3 、Nd 2 o 3 , SnO 4 and MoO 3 As the raw material, the molar ratio Dy 2 o 3 :Nd 2 o 3 :SnO 4 :MoO 3 = Dy of 1:1:2:2 2 o 3 、Nd 2 o 3 , SnO 4 and MoO 3 Mix the powder thoroughly;

[0063] (2) Grinding the fully mixed powder in a ball mill until the particle size of the powder reaches 1.0-1.5 microns, drying at 200±30°C for 3±0.5h, pressing into tablets, and firing in a high-temperature sintering furnace;

[0064] (3) Raise the temperature to 400±30°C, keep it warm for 4±1h, then cool it down, take out the powder tablet and pulverize it until the particle size is 1.2-1.8 microns;

[0065] (4) Press the powder in step (3) into tablets, put it into a high-temperature sintering furnace at 750±30°C for sintering, keep it warm for 8±1h, then cool it down, take out the powder tablet and pulverize it u...

Embodiment 3

[0072] Synthesis of DyNdSnMoO by Salt Assisted Spray Combustion 8 Powder catalytic material, comprising the following steps:

[0073] (1) Dy with a purity of 99.99% 2 o 3 Dissolved in an appropriate amount of nitric acid to obtain Dy(NO 3 ) 3 ,spare;

[0074] (2) (2.1) Weigh an appropriate amount of Nd 2 o 3 Dissolve with an appropriate amount of HF to obtain a soluble source of neodymium;

[0075] (2.2) Add ammonia water to the neodymium source until active Nd(OH) is obtained 3 Precipitation, suction filtration, washing to obtain a mixed solution, adding citric acid to the mixed solution, adding citric acid and Nd in a molar ratio of 3:1, adjusting the pH to 2-4, forming a clear Nd-citric acid solution;

[0076] (3) Molybdenum oxalate and ammonium molybdate aqueous solution are prepared respectively for subsequent use;

[0077] (4) Dy(NO 3 ) 3 Solution, Nd-citric acid solution, tin oxalate and ammonium molybdate aqueous solution are mixed and different amounts of a...

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Abstract

The invention discloses a powder catalyst which is capable of catalyzing reactions of organic pollutants, namely malathion, methylene blue and benzotriazole in light degraded water. The invention further discloses a preparation method of the powder catalysis material. The preparation method comprises a micro emulsion system hydrothermal method, a high-temperature solid-phase sintering method and asalt-assisted spraying combustion method. A preparation method of a film catalysis material comprises a radio frequency magnetron sputtering method. The invention further discloses a method for preparing a modified composite porous catalysis material. A BiOBr / DyNdSnMoO8 composite catalysis material prepared by using the method can be applied to photocatalysis to remove organic pollutants, namelymalathion, methylene blue and benzotriazole in water bodies.

Description

technical field [0001] The invention relates to the technical field of catalytic materials, and more specifically relates to the preparation and application of a powder catalytic material, a thin film catalytic material and a composite nano catalytic material. Background technique [0002] The rapid development of today's world has added a lot of convenience to people's life and promoted the development of human civilization. At the same time, it has also buried many hidden dangers in the environment on which we live, and posed a heavy challenge to the increasingly severe energy shortage. For this reason, the development and utilization of solar energy has gradually become a research hotspot, which provides a solution for solving environmental and energy problems. Among them, semiconductor photocatalysis technology has attracted extensive attention because it can directly convert solar energy into electrical energy or hydrogen energy, and can effectively decompose organic po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28B01J27/135B01J37/08B01J37/34C02F1/30C02F101/30C02F101/34
CPCB01J23/002B01J23/28B01J27/135B01J35/004B01J37/08B01J37/342B01J2523/00C02F1/30C02F2101/308C02F2101/34C02F2101/40C02F2305/10B01J2523/3725B01J2523/3762B01J2523/43B01J2523/68
Inventor 栾景飞沈栎
Owner NANJING UNIVERSTIY SUZHOU HIGH TECH INST