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Preparation method of flower-like TiO2/graphene photocatalyst and application thereof

A photocatalyst and graphene technology, applied in the fields of nanomaterials and environmental science, can solve the problems of poor biodegradability, low degradation rate, secondary pollution, etc., and achieve the effects of low cost, promotion of oxidation process, and improvement of degradation efficiency.

Inactive Publication Date: 2016-03-30
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional physicochemical and biochemical methods are firstly suitable for alkaline environments, and secondly, the process is complicated, which will cause secondary pollution, poor biodegradability, and low degradation rate

Method used

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  • Preparation method of flower-like TiO2/graphene photocatalyst and application thereof
  • Preparation method of flower-like TiO2/graphene photocatalyst and application thereof
  • Preparation method of flower-like TiO2/graphene photocatalyst and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: Disperse 0.02 g of graphene oxide powder in 5 mL of deionized water, and ultrasonically treat the mixture for 5-10 min to make the dispersion uniform.

[0036] Step 2: 10 mL of [Bpy]Br with a purity of 0.99 was added to the above mixture, and the mixture was sonicated for 5-10 minutes to make the dispersion uniform.

[0037] Step 3: Add 5mL0.5mol / LTiCl 4 solution, ultrasonically treat the mixture for 5-10 min to make the dispersion uniform.

[0038] Step 4: The mixed liquid obtained in Step 3 is subjected to microwave heating treatment for 30-60 min, the heating power is 120-130 W, and the microwave heating frequency is 6 GHz.

[0039] Step 5: The product was naturally cooled and then centrifuged, washed several times with deionized water and absolute ethanol, and dried in vacuum at 80° C. for 6 hours to obtain the final product.

[0040] Step 6: Finally get the remaining sodium pentachlorophenate crystals on the grapes and add water to dissolve to 100mL mass ...

Embodiment 2

[0045] The preparation method in this example is the same as that in Example 1, the only difference is that [Bpy]Br is not added in step 2 of this example, and the same amount of water is added instead, and other conditions remain unchanged.

[0046] see figure 2 , for the TiO prepared in this example 2 / SEM images of graphene catalysts. TiO at this time 2 It is a mixed structure of tiny particles and flowers, so it can be seen that the ionic liquid has the function of regulating TiO in this invention. 2 The role of morphology, participation of TiO as a shape control agent 2 generation process. TiO can be seen in the subsequent photodegradation experiment of sodium pentachlorophenate 2 The change of the morphology of the photocatalyst greatly affects the effect of photocatalysis.

[0047] Get the TiO that 500mg this embodiment prepares 2 / Graphene catalyst carries out photocatalytic degradation sodium pentachlorophenate test in photochemical reaction instrument, record...

Embodiment 3

[0049] The preparation method in this example is the same as in Example 1, the only difference is that [Bpy]Br is not added in step 2 of this example, and an equivalent amount of 1-butyl-3-methylimidazolium hexafluorophosphate is added instead Ionic liquid, the rest of the conditions remain unchanged.

[0050] see image 3 , for the TiO prepared in this example 2 / SEM images of graphene catalysts. TiO at this time 2 It is a mixed structure of ellipsoid and polyhedron, which shows that different ionic liquids in TiO 2 There are different mechanism effects and control results on the morphology control. TiO can be seen in the subsequent photodegradation experiment of sodium pentachlorophenate 2 The slight change in the morphology of the catalyst also changes its photocatalytic effect.

[0051] Get the TiO that 500mg this embodiment prepares 2 The photocatalytic degradation test of sodium pentachlorophenate was carried out by the graphene catalyst in the photochemical react...

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Abstract

The present invention relates to a preparation method of a flower-like TiO2 / graphene photocatalyst and application thereof. According to the photocatalyst disclosed by the present invention, titanium chloride (TiCl4) is taken as a titanium source, and a bromide N-butyl pyridine ionic liquid is taken as a shape control agent, so that the photocatalyst is prepared and formed through a hydrothermal microwave method; and the photocatalyst is specially applied to residual sodium pentachlorophenol in a vineyard, so that chemical toxic substances on grapes are reduced. In the preparation process, graphene oxide can be directly reduced into graphene by microwaves without the need of adding any other reducing agent, so that the purpose of green chemistry is achieved. The catalytic performance of the synthesized catalyst is greatly improved, the degradation of contaminants in industry is facilitated, and the synthesized catalyst has a good prospect in industrial applications.

Description

technical field [0001] The invention belongs to the field of nanomaterials and environmental science, in particular to a flower-like TiO 2 Preparation method and application of graphene photocatalyst. technical background [0002] Sodium pentachlorophenate is moderately toxic, has high water solubility, and is easy to spread widely through water as a carrier. People will cause symptoms such as fatigue, dizziness, vomiting, and diarrhea due to skin contact or accidental ingestion, and directly affect the DNA of CHO cells. Cause fracture damage, has potential carcinogenicity to human body. Sodium pentachlorophenate is commonly used as a powerful fungicide in vineyards, and it is used as an eradicating agent during the dormant period of grapes to kill overwintering viruses on branches. At different stages of grape growth, different concentrations of sodium pentachlorophenate will be sprayed, and if the residual sodium pentachlorophenate is not handled properly, it will enter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J21/06A62D3/17A62D101/28A62D101/04
CPCA62D3/17B01J21/06B01J21/18A62D2101/04A62D2101/28
Inventor 李宇亮杨思语张文杉卢筱佳孙钰琨
Owner CHANGAN UNIV
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