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Bismuth molybdate photocatalysis material rich in surface oxygen defects, and preparation method thereof

A photocatalytic material, bismuth molybdate technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, molybdenum compounds, etc., can solve the problem of low visible light catalytic activity of bismuth molybdate, etc., and achieve visible light Wide response range, good repeatability and easy operation

Inactive Publication Date: 2018-12-18
YANAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The first object of the present invention is to provide a bismuth molybdate photocatalytic material rich in surface oxygen defects, which has good visible light response performance and can solve the problem of low visible light catalytic activity of bismuth molybdate

Method used

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  • Bismuth molybdate photocatalysis material rich in surface oxygen defects, and preparation method thereof
  • Bismuth molybdate photocatalysis material rich in surface oxygen defects, and preparation method thereof
  • Bismuth molybdate photocatalysis material rich in surface oxygen defects, and preparation method thereof

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Embodiment 1

[0041] Prepare the bismuth molybdate photocatalyst material that is rich in surface oxygen defect of the present invention, specifically implement according to the following steps:

[0042] Step 1.1, first measure 1.3mmol of Bi(NO 3) 3 ·5H 2 O was dissolved in 13ml of ethylene glycol solution, and then 0.65mmol of Na was added to the ethylene glycol solution 2 MoO 4 2H 2 O, finally stir until a transparent solution is obtained;

[0043] Step 1.2, first add 32.5mL of absolute ethanol to the transparent solution obtained in step 1.1 and stir for 1 hour, then transfer it to the reaction kettle and seal it, and then put the reaction kettle into an electric heating constant temperature blast drying box, Reaction at 140°C for 10 hours to obtain mixed solution A. After the reaction, the mixed solution A was naturally cooled to room temperature, then centrifuged and washed, and finally vacuum-dried at 60°C for 1 hour to obtain molybdic acid powder Bismuth-based catalytic materia...

Embodiment 2

[0047] Prepare the bismuth molybdate photocatalyst material that is rich in surface oxygen defect of the present invention, specifically implement according to the following steps:

[0048] Step 1.1, first measure 1.3mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 13ml of ethylene glycol solution, and then 0.65mmol of Na was added to the ethylene glycol solution 2 MoO 4 2H 2 O, finally stir until a transparent solution is obtained;

[0049] Step 1.2, first add 32.5mL of absolute ethanol to the transparent solution obtained in step 1.1 and stir for 1 hour, then transfer it to the reaction kettle and seal it, and then put the reaction kettle into an electric heating constant temperature blast drying box, Reaction at 140°C for 10 hours to obtain mixed solution A. After the reaction, the mixed solution A was naturally cooled to room temperature, then centrifuged and washed, and finally vacuum-dried at 60°C for 1 hour to obtain molybdic acid powder Bismuth-based catalytic materi...

Embodiment 3

[0053] Prepare the bismuth molybdate photocatalyst material that is rich in surface oxygen defect of the present invention, specifically implement according to the following steps:

[0054] Step 1.1, first measure 1.3mmol of Bi(NO 3 ) 3 ·5H 2 O was dissolved in 13ml of ethylene glycol solution, and then 0.65mmol of Na was added to the ethylene glycol solution 2 MoO 4 2H 2 O, finally stir until a transparent solution is obtained;

[0055] Step 1.2, first add 32.5mL of absolute ethanol to the transparent solution obtained in step 1.1 and stir for 1 hour, then transfer it to the reaction kettle and seal it, and then put the reaction kettle into an electric heating constant temperature blast drying box, React at 160°C for 12 hours to obtain mixed solution A. After the reaction is completed, cool mixed solution A to room temperature naturally, then centrifuge and wash, and finally vacuum dry at 80°C for 1h-3h to obtain powder. Bismuth molybdate-based catalytic materials;

[...

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Abstract

The invention discloses a bismuth molybdate photocatalysis material rich in surface oxygen defects. The bismuth molybdate photocatalysis material rich in surface oxygen defects comprises a bismuth molybdate photocatalysis material, and oxygen defects are introduced to the surface of the bismuth molybdate photocatalysis material through calcinations. The invention also discloses a preparation method of the bismuth molybdate photocatalysis material rich in surface oxygen defects. The preparation method concretely comprises the following steps: 1, preparing a bismuth molybdate-based catalysis material; and 2, performing calcination to introduce the oxygen defects to the surface of the bismuth molybdate-based catalysis material obtained in step 1 in order to prepare the bismuth molybdate photocatalysis material rich in surface oxygen defects. The bismuth molybdate photocatalysis material rich in surface oxygen defects has the advantages of non-agglomeration, wide visible light response range and good reusability, and has a significantly higher catalytic activity than pure bismuth molybdate; and the preparation method has the advantages of simplicity, mild conditions, good controllability, and convenience in operation.

Description

technical field [0001] The invention belongs to the technical field of industrial catalytic preparation, in particular to a bismuth molybdate photocatalytic material rich in surface oxygen defects, and also to a preparation method of the bismuth molybdate photocatalytic material rich in surface oxygen defects. Background technique [0002] Bi 2 MoO 6 (Bismuth molybdate), as the simplest Aurivillius (Olivillius), is produced by (Bi 2 o 2 ) 2+ layer and (MoO 4 ) 2- Layers are stacked alternately to form a layered composite oxide, Bi 2 MoO 6 The valence band is defined by Bi 6s and O 2p Orbital hybridization, the conduction band is Mo 3d track formation, its forbidden band width is about 2.5-2.8eV, and its maximum absorption wavelength is about 490nm, which can absorb part of visible light and be excited. Therefore, Bi 2 MoO 6 The research and development of photocatalytic materials will provide new ideas for improving the utilization rate of sunlight, which has pot...

Claims

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Application Information

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IPC IPC(8): B01J23/31C01G39/00C02F1/30C02F101/34
CPCC01G39/00C02F1/30B01J23/31C02F2305/10C02F2101/345B01J35/39
Inventor 付峰申会东薛文文王丹军闫龙郭莉
Owner YANAN UNIV
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