Preparation method of bismuth sulfide/titanium dioxide/graphene compound with high-catalysis degradation activity under visible light

A technology for catalytic degradation of titanium dioxide, applied in chemical/physical processes, chemical instruments and methods, catalysts for physical/chemical processes, etc., can solve problems such as small charge transfer ability, achieve enhanced utilization, and improve the ability to degrade organic pollutants , enhance the effect of interaction

Inactive Publication Date: 2017-02-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO 2 The unique electronic band structure and excellent surface activity give it a wide range of applications in hydrogen production, photovoltaics, catalysts, lithium-ion batteries, fuel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Synthesis of bismuth sulfide / titanium dioxide / graphene composite: Dissolve 10mL graphene oxide in 60mL absolute ethanol at room temperature, continuously stir, ultrasonically disperse for 0.5h, add 0.0227g bismuth nitrate pentahydrate and 0.0186 g sodium sulfide nonahydrate, continue to stir for 30 minutes to obtain a uniformly dispersed suspension; then, slowly add 4 mL of tetrabutyl titanate to the above suspension, and add 10 mL of water dropwise under continuous stirring, and continue to stir for 1 hour; stir to obtain a uniform After the suspension was transferred to a polytetrafluoroethylene-lined high-pressure hydrothermal reactor at 160 ° C for solvothermal reaction for 18 hours, after the reaction was completed, it was naturally cooled to room temperature, and the obtained product was washed with deionized water and absolute ethanol in turn. Three times, the samples obtained by centrifugation were dried at 80°C for 8h, and then calcined at 450°C for 2h under...

Embodiment 2

[0017] (1) Synthesis of bismuth sulfide / titanium dioxide / graphene composite: Dissolve 10mL graphene oxide in 60mL absolute ethanol at room temperature, continuously stir, ultrasonically disperse for 4h, add 0.0227g bismuth nitrate pentahydrate and 0.0186g Sodium sulfide nonahydrate, continue to stir for 30 minutes to obtain a uniformly dispersed suspension; then, slowly add 6 mL of tetrabutyl titanate to the above suspension, and add 10 mL of water dropwise under continuous stirring, and continue to stir for 1 hour; stir to obtain a uniform The suspension was then transferred to a polytetrafluoroethylene-lined high-pressure hydrothermal reactor at 180°C for solvothermal reaction for 20 hours. After the reaction, it was naturally cooled to room temperature. The obtained product was washed with deionized water and absolute ethanol for 3 The second time, the sample obtained by centrifugation was dried at 80°C for 8h, and then calcined at 500°C for 4h at a rate of 4°C / min in a nitr...

Embodiment 3

[0020](1) Synthesis of bismuth sulfide / titanium dioxide / graphene composite: Dissolve 60mL graphene oxide in 60mL absolute ethanol at room temperature, continuously stir, ultrasonically disperse for 1h, add 0.0227g bismuth nitrate pentahydrate and 0.0186g Sodium sulfide nonahydrate, continue to stir for 30 minutes to obtain a uniformly dispersed suspension; then, slowly add 4 mL of tetrabutyl titanate to the above suspension, and add 10 mL of water dropwise under continuous stirring, and continue to stir for 1 hour; stir to obtain a uniform The suspension was then transferred to a polytetrafluoroethylene-lined high-pressure hydrothermal reactor at 200°C for solvothermal reaction for 30 hours. After the reaction, it was naturally cooled to room temperature. The obtained product was washed with deionized water and absolute ethanol for 3 The second time, the sample obtained by centrifugation was dried at 80°C for 8h, and then calcined at 600°C for 6h at a heating rate of 4°C / min un...

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Abstract

The invention provides a preparation method of a bismuth sulfide/titanium dioxide/graphene compound with high-catalysis degradation activity under visible light and belongs to the technical field of preparation of photocatalysts. According to the preparation method, tetrabutyl titanate and graphene oxide are used as raw materials, and bismuth nitrate pentahydrate and sodium sulfide nonahydrate are used as bismuth sulfide raw materials; the raw materials are subjected to solvent thermal and calcination treatment; finally, the bismuth sulfide/titanium dioxide/graphene compound is obtained. According to the synthesized bismuth sulfide/titanium dioxide/graphene compound, an adsorption capability on organic pollutants is enhanced, and the compound has a relatively high absorption capability on the visible light; the service life of an electron-hole pair can be prolonged; the catalysis degradation capability on the organic pollutants is enhanced and the degradation rate is 2.93 times as much as that of TiO2 nanoparticles and is 1.42 times as much as that of bismuth sulfide/TiO2, so that the bismuth sulfide/titanium dioxide/graphene compound has a relatively high actual application value.

Description

technical field [0001] The invention relates to a method for preparing a bismuth sulfide / titanium dioxide / graphene compound with high catalytic degradation activity under visible light, and belongs to the technical field of photocatalyst preparation. Background technique [0002] In catalysis and energy related fields, TiO 2 It soon attracted the attention of many scientists. TiO 2 The unique electronic band structure and excellent surface activity give it a wide range of applications in hydrogen production, photovoltaics, catalysts, lithium-ion batteries, fuel cells, gas sensors, detoxification, supercapacitors, etc. However, TiO 2 The relatively small charge-transfer capability and wide bandgap (~3.2eV) are two main factors limiting their applications. In order to overcome these problems, many measures have been taken, such as doping with other semiconductors, metal and non-metal, and compounding with carbon materials (RSC Advances, 2014, 4, 1120-1127), etc., to extend ...

Claims

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Application Information

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IPC IPC(8): B01J27/04
CPCB01J27/04B01J35/004
Inventor 刘湘刘亚史一丹
Owner JIANGNAN UNIV
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