Preparation method and application of black TiO2 clad metal copper nanometer photocatalyst

A nano-photocatalyst, metal copper technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of easy oxidation of nano-copper metal particles, Achieve the effect of strong visible light catalytic reduction of CO2

Inactive Publication Date: 2015-12-30
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solved the problem that nano-copper metal particles are easily oxidized in the photocatalytic process

Method used

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  • Preparation method and application of black TiO2 clad metal copper nanometer photocatalyst
  • Preparation method and application of black TiO2 clad metal copper nanometer photocatalyst
  • Preparation method and application of black TiO2 clad metal copper nanometer photocatalyst

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Embodiment 1

[0028] a. Weigh 2.41 grams of Cu(NO 3 ) 2 ·3H 2 O, 11.25 g Al(NO 3 ) 3 9H 2 O was dissolved in water to make 100ml solution, and another 6.4 grams of sodium carbonate was dissolved in 100ml solution, and the two solutions were added dropwise to 200ml distilled water under stirring, and the temperature was 80°C in a water bath to form a blue precipitate, which was washed with distilled water first 5 times, then washed once with absolute ethanol, dried in an oven at a temperature of 120°C, and then roasted at a temperature of 400°C for 3 hours to obtain a composite of copper oxide and aluminum oxide;

[0029] b. Disperse the compound into 100ml of 2mol / L sodium hydroxide solution, react for 12 hours, remove aluminum oxide in the compound, filter the resulting suspension, wash with distilled water, and dry at 80°C to obtain nano-copper oxide powder , and then weighed 0.0028 grams of nano-copper oxide powder, and reduced it with hydrogen at a temperature of 240 ° C for 3 hour...

Embodiment 2

[0032] a. Weigh 2.14 grams of Cu(NO 3 ) 2 ·3H 2 O, 11.25 g Al(NO 3 ) 3 9H 2 O was dissolved in water to make a 100ml solution, and another 6.7 grams of sodium carbonate was dissolved in a 100ml solution, and the two solutions were added dropwise to 200ml of distilled water under stirring, and the temperature was 80°C in a water bath to form a blue precipitate, which was first washed with distilled water 5 times, then washed once with absolute ethanol, dried in an oven at a temperature of 120°C, and baked in a muffle furnace at a temperature of 450°C for 2 hours to obtain a composite oxide of copper oxide and aluminum oxide;

[0033] b. Disperse the composite oxide into 100ml of 2mol / L sodium hydroxide solution, react for 12 hours, remove the aluminum oxide in the composite, and filter the resulting suspension, wash with distilled water, and dry at 80°C to obtain nano-copper oxide Powder, take 0.004 g of nano-copper oxide powder, and reduce it with hydrogen at a temperatur...

Embodiment 3

[0036] a. Weigh 2.14 grams of Cu(NO 3 ) 2 ·3H 2 O, 15.00 grams of Al(NO 3 ) 3 9H 2 O was dissolved in water to make a 100ml solution, and another 8.16 grams of sodium carbonate was dissolved in a 100ml solution, and the two solutions were added dropwise to 200ml of distilled water under stirring, and the temperature was 80°C in a water bath to form a blue precipitate, and then the precipitate was first used Distilled water 5 times, then washed once with absolute ethanol, dried in an oven at 120°C, and roasted in a muffle furnace at 500°C for 1 hour to obtain a composite oxide of copper oxide and aluminum oxide;

[0037] b. Disperse the obtained composite oxide into 100ml of 5mol / L sodium hydroxide solution and react for 12 hours to remove the aluminum oxide in the composite. The obtained suspension is filtered, washed with distilled water, and dried at 80°C to obtain nano Copper oxide powder, weigh 0.008 g of nano-copper oxide powder, and reduce it with hydrogen at a temp...

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Abstract

The invention relates to a preparation method and application of a black TiO2 clad metal copper nanometer photocatalyst. The preparation method comprises the following two steps of firstly, preparation of nanocrystalline metal copper particles: synthesizing copper oxide-aluminum oxide compound, removing aluminum oxide and reducing nanometer copper oxide; and secondly, performing hydrolysis precipitation on a titanium source on surfaces of metallic copper nano particles under the protection of an inert or hydrogen atmosphere, and drying and performing vacuum roasting to obtain the black TiO2 clad metal copper nanometer photocatalyst. The preparation method has the advantages that nanocrystalline metal copper particles can be obtained without surfactant, and preparation cost is low. The photocatalyst prepared by the method is high in visible light region full-color response and high in photo-induced carrier separating efficiency, and good photo-reduction CO2 activity can be shown in visible light. Moreover, the metallic copper nano particles in the photocatalyst are not oxidized in a light-catalyzed reaction process.

Description

technical field [0001] The present invention relates to a kind of black TiO 2 Preparation method and application of coated metal copper nano photocatalyst. Background technique [0002] In recent years, the greenhouse effect and energy issues have received widespread attention. Among them, the greenhouse gas carbon dioxide mainly comes from the burning of fossil fuels. Based on the fact that fossil fuels will still be the main energy source in the next few decades, carbon dioxide treatment technologies, such as the use of biological fixation, physical / chemical adsorption, and chemical conversion, have been a research hotspot in recent years. Among these technologies, photocatalytic reduction of carbon dioxide not only reduces carbon dioxide emissions, but also converts carbon dioxide into economically valuable hydrocarbon fuels. The process is carried out under normal temperature and pressure, the raw materials are simple and easy to obtain, direct use of solar energy doe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J35/02C01B31/18C07C9/04C07C1/02C01B32/40
Inventor 赵杰王传义王云
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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