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Full spectrum photocatalyst and preparation method thereof

A photocatalyst and photocatalytic technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. The effect of large surface area

Inactive Publication Date: 2013-09-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, the preparation of bismuth tungstate / titanium dioxide nanobelt surface heterostructure photocatalysts and the application of ultraviolet, visible, and near-infrared photocatalysis have not been reported.

Method used

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  • Full spectrum photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Mix bismuth nitrate and titanium dioxide nanobelts with a molar ratio of 1:12, fully dissolve them in an ethylene glycol organic solvent, then add 1 / 2 molar amount of bismuth nitrate sodium tungstate solution to the above solution dropwise, and magnetically stir After half an hour, the stirred solution was placed in a hydrothermal reactor at 200°C for 12 hours, and the reacted solution was filtered, and the resulting precipitate was washed with deionized water and ethanol, and then the separated precipitate was placed in 80 ℃ for 12 hours to obtain a bismuth tungstate / titanium dioxide nanobelt surface heterogeneous structure photocatalyst with full-spectrum photocatalytic degradation of pollutants, wherein the titanium dioxide nanobelt has a width of 50-300nm and a thickness of 20-50nm. The width of the bismuth tungstate nanoplate grown on the titanium dioxide nanobelt in liquid phase is 10-20nm, and the length is 20-30nm.

Embodiment 2

[0018] Mix bismuth nitrate and titanium dioxide nanobelts with a molar ratio of 2:12, fully dissolve them in an ethylene glycol organic solvent, then add 1 / 2 molar amount of bismuth nitrate sodium tungstate solution to the above solution dropwise, and magnetically stir After half an hour, the stirred solution was placed in a hydrothermal reactor at 200°C for 12 hours, and the reacted solution was filtered, and the resulting precipitate was washed with deionized water and ethanol, and then the separated precipitate was placed in 80 ℃ for 12 hours to obtain a bismuth tungstate / titanium dioxide nanobelt surface heterogeneous structure photocatalyst with full-spectrum photocatalytic degradation of pollutants, wherein the titanium dioxide nanobelt has a width of 50-300nm and a thickness of 20-50nm. The width of the bismuth tungstate nanoplate grown on the titanium dioxide nanobelt in liquid phase is 10-20nm, and the length is 20-30nm.

[0019] The SEM, TEM and HRTE of the surface h...

Embodiment 3

[0021] Mix bismuth nitrate and titanium dioxide nanobelts with a molar ratio of 1:1, fully dissolve in ethylene glycol organic solvent, then add 1 / 2 molar amount of bismuth nitrate sodium tungstate solution to the above solution dropwise, and magnetically stir After half an hour, the stirred solution was placed in a hydrothermal reactor at 200°C for 12 hours, and the reacted solution was filtered, and the resulting precipitate was washed with deionized water and ethanol, and then the separated precipitate was placed in 80 ℃ for 12 hours to obtain a bismuth tungstate / titanium dioxide nanobelt surface heterogeneous structure photocatalyst with full-spectrum (ultraviolet, visible, near-infrared) photocatalytic degradation of pollutants, wherein the width of the titanium dioxide nanobelt is 50- 300nm and a thickness of 20-50nm, the width of the bismuth tungstate nanosheet grown in liquid phase on the titanium dioxide nanobelt is 10-20nm, and the length is 20-30nm.

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Abstract

The invention discloses a bismuth tungstate / titanium dioxide nanoribbon surface heterostructure photocatalyst with performance of carrying out full spectrum catalytic degradation on pollutants. The bismuth tungstate / titanium dioxide nanoribbon surface heterostructure photocatalyst is formed by a titanium dioxide nanoribbon and a bismuth tungstate nanosheet grown on the titanium dioxide nanoribbon in a liquid phase manner. A preparation method of the bismuth tungstate / titanium dioxide nanoribbon surface heterostructure photocatalyst comprises the following steps: mixing bismuth nitrate and the titanium dioxide nanoribbon and sufficiently dissolving the mixture into ethylene glycol; then dropwise adding sodium tungstate solution into the solution; placing the mixed solution into a hydrothermal kettle to react; washing precipitates by deionized water and ethanol; and performing heat preservation on the separated precipitates under the temperature condition of 80 DEG C plus and minus 1 DEG C to obtain the bismuth tungstate / titanium dioxide nanoribbon surface heterostructure photocatalyst. The method disclosed by the invention has a simple process; the obtained photocatalyst material has an excellent photocatalysis effect under ultraviolet light, visible light and near-infrared light and can rapidly perform photocatalysis and degradation on the organic pollutants; the utilization rate of the light-catalyzed reaction for the sunlight is greatly improved; and the utilization range of the sunlight is widened.

Description

technical field [0001] The invention relates to a full-spectrum photocatalyst and a preparation method thereof, in particular to a bismuth tungstate / titanium dioxide nanobelt surface heterostructure photocatalyst with full-spectrum (ultraviolet, visible, near-infrared) photocatalytic degradation performance of pollutants and its preparation method. It belongs to the field of photocatalytic materials and their preparation. Background technique [0002] In the spectrum of sunlight, ultraviolet light accounts for 5% of the total energy of sunlight. Among them, the most typical semiconductor material for photocatalysis using ultraviolet light is titanium dioxide, which has the advantages of low price and stable chemical properties, but its light absorption Only in the UV region. In the solar spectrum, the energy of visible light accounts for 48%. Visible light catalysts such as cerium oxide, bismuth molybdate, and cuprous oxide have also attracted extensive research. However,...

Claims

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Application Information

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IPC IPC(8): B01J23/31
Inventor 刘宏田健桑元华郝品赵振环王兴琪陈国辉
Owner SHANDONG UNIV
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