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Preparation method of Bi-Bi3NbO7 composite photocatalyst and Bi-Bi3NbO7 composite photocatalyst

A technology of bi-bi3nbo7 and composite light, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems affecting the stability of the catalytic process, and improve the visible light photocatalytic degradation activity and operation Simple, easy to prepare and safe results

Inactive Publication Date: 2018-09-04
王楷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing modification technologies are mainly ion doping, noble metal deposition, surface modification and formation of heterojunction catalysts with other semiconductors, etc., but these methods introduce foreign elements, which bring some other problems, such as affecting the stability of the catalytic process sex etc.

Method used

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  • Preparation method of Bi-Bi3NbO7 composite photocatalyst and Bi-Bi3NbO7 composite photocatalyst

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preparation example Construction

[0027] A Bi-Bi 3 NbO 7 The preparation method of the composite photocatalyst includes the following steps:

[0028] S01: Weigh bismuth nitrate pentahydrate and niobium oxalate at a molar ratio of 3:1, and dissolve the weighed bismuth nitrate pentahydrate and niobium oxalate in a 1:4 volume ratio of glacial acetic acid and methanol mixed solution, fully Stir to obtain the first mixed solution;

[0029] S02: Slowly add benzyl alcohol to the first mixed solution, and stir thoroughly to obtain a second mixed solution;

[0030] S03: Add potassium hydroxide solution to the second mixed solution, adjust the PH value of the second mixed solution to about 13, and then conduct a hydrothermal reaction at 180°C for 24 hours, and separate a pale yellow precipitate after cooling Thing

[0031] S04: Wash and dry the light yellow precipitate to obtain Bi 3 NbO 7 Nanosheets;

[0032] S05: Put the Bi 3 NbO 7 Nanosheets are dispersed in ethylene glycol solution, an appropriate amount of bismuth source i...

Embodiment 1

[0046] Example One, a Bi-Bi 3 NbO 7 The preparation method of the composite photocatalyst includes the following steps:

[0047] S01: Weigh bismuth nitrate pentahydrate and niobium oxalate in a molar ratio of 3:1, and dissolve the weighed bismuth nitrate pentahydrate and niobium oxalate in 50ml of a 1:4 volume ratio of glacial acetic acid and methanol mixed solution, Stir fully to obtain the first mixed solution;

[0048] The mixed solution of 50ml glacial acetic acid and methanol contains 10ml glacial acetic acid and 40ml methanol;

[0049] S02: Slowly add 20 ml of benzyl alcohol to the first mixed solution, and stir thoroughly to obtain a second mixed solution;

[0050] S03: Add 7mol / L potassium hydroxide solution to the second mixed solution, adjust the pH of the second mixed solution to 13, and then conduct a hydrothermal reaction at 180°C for 24h, and separate after cooling Light yellow precipitate;

[0051] S04: Wash and dry the light yellow precipitate to obtain Bi 3 NbO 7 Nano...

Embodiment 2

[0057] Embodiment two, a Bi-Bi 3 NbO 7 The preparation method of the composite photocatalyst includes the following steps:

[0058] S01: Weigh bismuth nitrate pentahydrate and niobium oxalate in a molar ratio of 3:1, and dissolve the weighed bismuth nitrate pentahydrate and niobium oxalate in 50ml of a 1:4 volume ratio of glacial acetic acid and methanol mixed solution, Stir fully to obtain the first mixed solution;

[0059] The mixed solution of 50ml glacial acetic acid and methanol contains 10ml glacial acetic acid and 40ml methanol;

[0060] S02: Slowly add 20 ml of benzyl alcohol to the first mixed solution, and stir thoroughly to obtain a second mixed solution;

[0061] S03: Add 7mol / L potassium hydroxide solution to the second mixed solution, adjust the pH of the second mixed solution to 13, and then conduct a hydrothermal reaction at 180°C for 24h, and separate after cooling Light yellow precipitate;

[0062] S04: Wash and dry the light yellow precipitate to obtain Bi 3 NbO 7 N...

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Abstract

The invention relates to a preparation method of a Bi-Bi3NbO7 composite photocatalyst and the Bi-Bi3NbO7 composite photocatalyst. The preparation method comprises the following steps: S01, weighing bismuth nitrate pentahydrate and niobium oxalate, and dissolving the bismuth nitrate pentahydrate and the niobium oxalate into glacial acetic acid and methanol, thus obtaining a first mixed solution; S02, adding phenylcarbinol in the first mixed solution, thus obtaining a second mixed solution; S03, adding a potassium hydroxide solution in the second mixed solution, and carrying out hydrothermal reaction; S04, washing and drying precipitate, thus obtaining Bi3NbO7 nanosheets; S05, dispersing the Bi3NbO7 nanosheets in an ethylene glycol solution, and adding a bismuth source, thus obtaining a third mixed solution; S06, carrying out the hydrothermal reaction on the third mixed solution; S07, washing and drying precipitate, thus obtaining Bi-Bi3NbO7. The preparation method disclosed by the invention has the beneficial effect that through a preparation technology that dipping-hydrothermal reduction and secondary hydrothermal reduction are combined, a high-activity photocatalyst is prepared.

Description

Technical field [0001] The present invention relates to the technical field of photocatalysts and new materials, in particular to a Bi-Bi 3 NbO 7 Preparation method of composite photocatalyst and Bi-Bi 3 NbO 7 Composite photocatalyst. Background technique [0002] Photocatalytic technology has shown unique potential application value in treating environmental problems and solving energy crises, especially in the degradation of organic pollutants in mineralized water bodies. Among many photocatalytic materials, TiO 2 Because of its low cost, redox ability and high photochemical stability, it has become one of the photocatalytic materials attracting attention. However, with TiO 2 Many traditional catalysts represented by it do not have the potential for sustainable development, and one of the important reasons is TiO 2 The band gap is wide and can only be excited under ultraviolet light, which leads to a low utilization rate of solar energy. In addition, TiO 2 The lower quantum ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C02F1/30C02F101/38
CPCC02F1/30B01J23/002B01J23/22C02F2101/38C02F2305/10B01J35/39
Inventor 王楷
Owner 王楷
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