BiOI-graphene visible light catalyst and preparation method thereof

A technology of visible light and catalyst, applied in the field of BiOI-graphene visible light catalyst and its preparation, can solve the problems of BiOI-graphene composite visible light catalyst, achieve high visible light catalytic activity, economical and environmentally friendly preparation process, and simple preparation process Effect

Inactive Publication Date: 2012-10-03
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there have been no reports of BiOI-graphene composite visible light catalysts.

Method used

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  • BiOI-graphene visible light catalyst and preparation method thereof
  • BiOI-graphene visible light catalyst and preparation method thereof
  • BiOI-graphene visible light catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Disperse 0.014g of graphite oxide in 20 ml of ethanol, ultrasonically for 1 h, to obtain a suspension of graphene oxide;

[0024] (2) At room temperature, dissolve 0.9701g of bismuth nitrate in 5ml of glacial acetic acid, then add 0.2998g of sodium iodide and 40ml of deionized water under stirring;

[0025] (3) Slowly add the suspension obtained in step (1) dropwise to the solution obtained in step (2);

[0026] (4) After stirring the solution obtained in step (3) for 2 h, transfer it to a polytetrafluoroethylene-lined autoclave, and conduct a crystallization reaction at 120° C. for 6 h;

[0027] (5) The obtained solid product was filtered, washed, and dried to obtain a BiOI-graphene composite visible light catalyst with a graphene content of 2.0 wt.%.

[0028] XRD analysis results see figure 1 , all the diffraction peaks in the figure correspond to the tetragonal BiOI (JCPDS 10-0445), at 2θ=10.7 o The characteristic diffraction peaks of graphite oxide at the dis...

Embodiment 2

[0030] Operation process is except following difference, all the other are with embodiment 1.

[0031] Disperse 0.007 g of graphite oxide in 20 ml of ethanol and ultrasonicate for 1 h. Finally, a BiOI-graphene composite visible light catalyst with a graphene content of 1.0 wt.% was prepared.

[0032] The XRD result of the sample can be found in figure 1 , UV-Vis absorption spectrum see image 3 , photocatalytic performance see Figure 4 .

Embodiment 3

[0034] Operation process is except following difference, all the other are with embodiment 1.

[0035] Disperse 0.022 g of graphite oxide in 20 ml of ethanol and ultrasonicate for 1 h. BiOI-graphene composite visible light catalyst with 3.0 wt.% graphene content.

[0036] The XRD result of the sample can be found in figure 1 , UV-Vis absorption spectrum see image 3 , photocatalytic performance see Figure 4 .

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Abstract

The invention relates to a BiOI-graphene visible light catalyst and a preparation method thereof, belonging to the technical field of inorganic material synthesis and photocatalysis. BiOI and graphene are in the shape of a slice, and the graphene is 1.0%-3.0% by weight. The preparation method of the BiOI-graphene visible light catalyst comprises the following steps of: firstly ultrasonically dispersing graphite oxides into ethanol; then stirring, and adding a certain amount of sodium iodide or potassium iodide water solutions and bismuth nitrate glacial acetic acid solutions at the same time; transferring suspending liquid into a high-pressure reaction kettle with a polytetrafluoroethylene liner, and carrying out crystallization reaction at 120-150 DEG C for 6-12 hours; filtering, washing and drying obtain solid products so as to finally obtain the BiOI-graphene compound light catalyst. The preparation method has environment friendliness and simple process; and the prepared BiOI-graphene visible light catalyst has very high visible light catalytic activity and potential application value in a control technology decomposing organic pollutants by utilizing solar photocatalysis.

Description

technical field [0001] The invention relates to a BiOI-graphene visible light catalyst and a preparation method thereof, belonging to the technical field of inorganic material synthesis and photocatalysis. Background technique [0002] In recent years, energy shortage and environmental pollution have increasingly become major issues threatening human survival and health. Photocatalytic technology is a new green environmental management technology that uses semiconductors as catalysts to degrade organic environmental pollutants using solar energy. TiO 2 Stable chemical performance, non-toxic, cheap, is currently the most commonly used semiconductor photocatalyst, but TiO 2 Photocatalysts have a wide energy band (Eg = 3.2 eV), can only be excited by ultraviolet light in sunlight (accounting for 3.8% of solar energy), and cannot use visible light in sunlight, making their solar energy utilization rate low, which seriously hinders their use. Large-scale commercial promotion. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/30
Inventor 刘红曹巍然苏芸陈振
Owner SHANGHAI UNIV
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