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A kind of ceo2/bi2wo6/mgal-ldh composite photocatalyst and its preparation method and application

A technology of catalyst and composite light, which is applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical instrument and method, etc., to achieve good photocatalytic degradation activity, less pollution, and rich preparation methods Effect

Inactive Publication Date: 2018-03-23
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional CeO 2 Photocatalysts can only respond to ultraviolet light with a wavelength less than 420 nm (about 5% of sunlight) due to its wide band gap (Eg=2.94 eV).

Method used

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  • A kind of ceo2/bi2wo6/mgal-ldh composite photocatalyst and its preparation method and application
  • A kind of ceo2/bi2wo6/mgal-ldh composite photocatalyst and its preparation method and application
  • A kind of ceo2/bi2wo6/mgal-ldh composite photocatalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Soak 4 g of kapok in 80 mL of NaOH (20wt%), let it stand at room temperature for 24 h, filter it dry, put it in a drying oven at 80°C for 10 h, and obtain pretreated kapok; take 4 g of pretreated kapok, impregnate Put it into 200 mL ethanol solution of cerium nitrate with a concentration of 0.5 mol / L, let it stand for 8 h; take out the impregnated kapok, dry it, and calcinate it in a muffle furnace at 500 °C for 0.5 h to obtain CeO 2 . Take 0.5 mmol, 1.5 mmol, 1.5 mmol of aluminum nitrate, magnesium sulfate and urea, mix them and dissolve them in 60 mL of distilled water, add 2 g of CeO 2 , after magnetic stirring for 20 min, put it into a 100 mL reaction kettle, keep it in an incubator at 160 °C for 16 h, after cooling, filter, wash and dry to obtain CeO 2 / MgAl-LDH.

[0026] Dissolve 5 mmol of bismuth nitrate in 2.5 mL of 20 wt% nitric acid solution to obtain solution A; dissolve 2.5 mmol of sodium tungstate in 20 mL of ethylene glycol to obtain solution B; pour sol...

Embodiment 2

[0028] Soak 4 g of kapok in 80 mL of NaOH (20wt%), let it stand at room temperature for 24 h, filter it dry, put it in a drying oven at 80°C for 10 h, and obtain pretreated kapok; take 4 g of pretreated kapok, impregnate Put it into 200 mL ethanol solution of cerium nitrate with a concentration of 0.5 mol / L, and let it stand for 8 h; take out the impregnated kapok, dry it, and calcinate it in a muffle furnace at 500 °C for 0.5 h to obtain CeO 2 . Take 0.5 mmol, 1.5 mmol, 1.5 mmol of aluminum nitrate, magnesium sulfate and urea, mix them and dissolve them in 60 mL of distilled water, add 2 g of CeO 2 , after magnetic stirring for 20 min, put it into a 100 mL reaction kettle, keep it in an incubator at 160 °C for 16 h, after cooling, filter, wash and dry to obtain CeO 2 / MgAl-LDH.

[0029] Dissolve 5 mmol of bismuth nitrate in 2.5 mL of 20 wt% nitric acid solution to obtain solution A; dissolve 2.5 mmol of sodium tungstate in 20 mL of ethylene glycol to obtain solution B; pour...

Embodiment 3

[0031] Soak 4 g of kapok in 80 mL of NaOH (20wt%), let it stand at room temperature for 24 h, filter it dry, put it in a drying oven at 80°C for 10 h, and obtain pretreated kapok; take 4 g of pretreated kapok, impregnate Put it into 200 mL ethanol solution of cerium nitrate with a concentration of 0.5 mol / L, and let it stand for 8 h; take out the impregnated kapok, dry it, and calcinate it in a muffle furnace at 500 °C for 0.5 h to obtain CeO 2 . Take 0.5 mmol, 1.5 mmol, 1.5 mmol of aluminum nitrate, magnesium sulfate and urea, mix them and dissolve them in 60 mL of distilled water, add 2 g of CeO 2 , after magnetic stirring for 20 min, put it into a 100 mL reaction kettle, keep it in an incubator at 160 °C for 16 h, after cooling, filter, wash and dry to obtain CeO 2 / MgAl-LDH.

[0032] Dissolve 5 mmol of bismuth nitrate in 2.5 mL of 20 wt% nitric acid solution to obtain solution A; dissolve 2.5 mmol of sodium tungstate in 20 mL of ethylene glycol to obtain solution B; pour...

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Abstract

The invention discloses a CeO2 / Bi2WO6 / MgAl-LDH composite photocatalyst, a preparation method and application thereof, and belongs to the field of photocatalytic materials. The present invention uses kapok as the form-guiding material, and utilizes hydrothermal method and solvothermal method to prepare CeO2 / Bi2WO6 / MgAl‑LDH composite photocatalyst. The composite catalyst has excellent photocatalytic performance, and can efficiently degrade the Organic Pollutants. The process path of the invention is simple and feasible, with low cost and little pollution.

Description

technical field [0001] The invention relates to a composite photocatalyst applied to the photocatalytic degradation of sewage, in particular to a CeO with kapok as a biological template 2 / Bi 2 WO 6 / MgAl-LDH composite photocatalyst, its preparation method and its application in photocatalytic degradation of acid fuchsin. Background technique [0002] Photocatalytic oxidation is based on the energy band theory of N-type semiconductors. After the N-type semiconductor absorbs photons with energy greater than the forbidden band width, it is excited to enter the conduction band, and at the same time, photoinduced holes are generated in the valence band and the conduction band. Photogenerated electrons and holes have strong redox ability and can degrade organic pollutants. The photocatalytic activity of a photocatalyst mainly depends on its energy band structure and specific surface area. Cerium oxide is a relatively common photocatalyst with good photocatalytic activity and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/31B01J35/06C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/725B01J23/002B01J23/31C02F2305/10C02F2101/308B01J2523/00B01J35/58B01J35/39B01J2523/3712B01J2523/69B01J2523/54Y02W10/37
Inventor 李嘉李健宋鹏左敏杨萍刘世权
Owner UNIV OF JINAN
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