Synthesis and application of Pt/BiVO4 composite photocatalyst adopting laminar structure

A sheet-like structure and complex light technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, preparation of organic compounds, etc., to achieve high conversion rate and mild reaction conditions

Active Publication Date: 2017-05-10
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using photoreduction deposition method to load platinum particles on BiVO 4 Composite photocatalysts with high activity can be obtained on the surface, but the composite materials have not been developed and utilized in the coupling reaction of photocatalytic phenolic compounds

Method used

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  • Synthesis and application of Pt/BiVO4 composite photocatalyst adopting laminar structure
  • Synthesis and application of Pt/BiVO4 composite photocatalyst adopting laminar structure
  • Synthesis and application of Pt/BiVO4 composite photocatalyst adopting laminar structure

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Under stirring conditions, weigh 1 mmol of bismuth nitrate pentahydrate and dissolve it in 10 mL of nitric acid solution with a concentration of 4 mol / L, and mark it as solution A. In addition, under the same stirring condition, weigh 0.5 mmol of ammonium metavanadate and dissolve it in 8 mL of NaOH solution with a concentration of 4 mol / L, then weigh 1.0 g of disodium edetate and dissolve it in the solution, and mark it as solution B . Then solution B was added dropwise to solution A, and magnetic stirring was continued to form a yellow solution. The pH of the yellow solution was adjusted to 7 with a NaOH solution having a concentration of 2 mol / L. Finally, the solution was transferred to a polytetrafluoroethylene-lined reactor with a volume of 50 mL, and placed in a blast drying oven at 180°C to react for 24 hours; Wash the product several times, and after centrifugation, place it in a vacuum oven at 60°C for 8 hours to dry. The obtained solid powder is BiVO with a ...

Embodiment 2

[0060] Pt / BiVO 4 The sheet-like structure composite photocatalyst can catalyze the coupling reaction of 2,6-disubstituted phenol, and the product is the corresponding biphenol compound. This example takes photocatalytic 2,6-dimethylphenol to prepare 3,3',5,5'-tetramethylbiquinone as an example.

[0061] Weigh 100mg of Pt / BiVO 4 The sheet-like structure composite photocatalyst is placed in a 10mL test tube, 4mL of dichloromethane is added as a solvent, and then 0.1mmol of the reactant 2,6-dimethylphenol is added, and then oxygen is introduced into the test tube and the test tube mouth is sealed .

[0062] Put the test tube in a constant temperature water bath at 25°C, place the constant temperature water bath on a magnetic stirrer, turn on the magnetic stirrer, irradiate with a xenon lamp with a power of 300W and a light emission wavelength λ>400nm, the distance between the lamp head of the xenon lamp is 12cm from the reaction test tube, and react for 24 hours . After the r...

Embodiment 3

[0064] Pt / BiVO 4 The sheet-like structure composite photocatalyst can also be suitable for catalyzing the coupling reaction of 2,4-disubstituent phenol, and the product is the corresponding biphenol compound on the ortho position of the hydroxyl group. This embodiment takes 2,4-di-tert-butylphenol as an example.

[0065] Weigh 100mg of Pt / BiVO 4 The sheet-like structure composite photocatalyst is placed in a 10mL test tube, 4mL of dichloromethane is added as a solvent, and then 0.1mmol of the reactant 2,4-di-tert-butylphenol is added, and then oxygen is introduced into the test tube and the test tube is sealed mouth. Put the test tube in a constant temperature water bath at 25°C, place the constant temperature water bath on a magnetic stirrer, turn on the magnetic stirrer, irradiate with a xenon lamp with a power of 300W and a light emission wavelength λ>400nm, the lamp head of the xenon lamp is 12cm away from the reaction test tube, and react for 24h.

[0066] After the re...

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Abstract

The invention discloses synthesis and application of a Pt/BiVO4 composite photocatalyst adopting a laminar structure. The synthesized photocatalyst is a heterogeneous composite photocatalyst which is formed by supporting Pt on laminar BiVO4 surface and has good photocatalytic activity. A Pt/BiVO4 composite adopting the laminar structure is taken as the photocatalyst, a xenon lamp with light emission wavelength lambda larger than 400 nm and the power being 300 W is used for irradiating 2,6-disubstituted phenol at the room temperature, a coupling reaction is performed, and a corresponding biphenol compound is synthesized; or 2,4-disubstituted phenol is irradiated, the coupling reaction is performed, and a corresponding xenol compound in a hydroxy ortho-position is synthesized.

Description

technical field [0001] The invention belongs to the field of photocatalytic organic synthesis and controllable synthesis of photocatalyst of heterogeneous nanometer composite material. Specifically related to a Pt / BiVO 4 Synthesis and application of sheet-like composite photocatalysts. Background technique [0002] Photocatalysis generally refers to the separation of photogenerated carriers in semiconductor material photocatalysts under the irradiation of light of a certain wavelength, and then induces redox reactions through photogenerated electrons and holes. Photocatalysis is the intersection of photochemistry and catalysis. In the face of increasingly prominent environmental and energy problems, the main work in the field of photocatalysis research is mainly focused on photocatalytic decomposition of water to produce hydrogen, photodegradation of air and water pollutants and other environmental governance and In terms of improvement, the conversion of solar energy and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/648C07C37/11C07C39/15
CPCB01J23/6482B01J35/004C07C37/11C07C39/15
Inventor 马德琨屈德朋柴圆圆黄少铭
Owner WENZHOU UNIVERSITY
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