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A kind of titanium dioxide-platinum-cobalt tetraoxide ternary composite photocatalytic material and preparation method thereof

A ternary and composite photocatalytic technology of cobalt trioxide, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as reducing the recombination of photogenerated carriers, Achieve the effect of solving the problem of electron-hole recombination

Active Publication Date: 2018-09-11
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many effective cocatalysts have been used in semiconductor photocatalysts, such as reduced cocatalysts (such as Pt, NiO, Cu(OH) 2 ,MoS 2 etc.) and oxidized cocatalysts (such as IrO 2 ,RuO 2 , CoOx, MnOx, etc.), however, studies have shown that these two co-catalysts can only play their role to the maximum when they are deposited on the corresponding oxidation or reduction surfaces, reducing the recombination of photogenerated carriers.

Method used

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  • A kind of titanium dioxide-platinum-cobalt tetraoxide ternary composite photocatalytic material and preparation method thereof
  • A kind of titanium dioxide-platinum-cobalt tetraoxide ternary composite photocatalytic material and preparation method thereof
  • A kind of titanium dioxide-platinum-cobalt tetraoxide ternary composite photocatalytic material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1) Quickly add 4.5mL of hydrofluoric acid into 25mL of tetrabutyl titanate, stir the mixed solution under the action of a magnetic stirrer for 1 hour until the solution is evenly mixed, and then transfer the mixed solution to a 100mL polytetrafluoroethylene liner In the hydrothermal reaction kettle, the hydrothermal reaction was carried out at 180°C for 24 hours, and the obtained precipitate was washed repeatedly with distilled water and ethanol, then dried in an oven at 80°C for 16 hours, and ground, and placed in a muffle furnace at 450 ℃ for 2 hours to obtain titanium dioxide nanosheets.

[0035] 2) Preparation of titanium dioxide nanosheets with platinum nanoparticles deposited on the surface: 50 mg of the titanium dioxide powder obtained above was added to 80 mL of a mixed solution of water and methanol (methanol: water = 1:3), and ultrasonically dispersed for 15 minutes to uniformly disperse the titanium dioxide in the In the above mixed solution, accurately measu...

Embodiment 2

[0047] 1) Quickly add 3mL of hydrofluoric acid into 25mL of tetrabutyl titanate, stir the mixed solution under the action of a magnetic stirrer for 1 hour until the solution is evenly mixed, then transfer the mixed solution to a 100mL Teflon-lined In a hydrothermal reaction kettle, conduct a hydrothermal reaction at 170°C for 24 hours, and the obtained precipitate is washed repeatedly with distilled water and ethanol, then dried in an oven at 80°C for 16 hours, and ground, and placed in a muffle furnace at 450°C After calcining for 2 hours, titanium dioxide nanosheets can be obtained.

[0048] 2) Preparation of titanium dioxide nanosheets with platinum nanoparticles deposited on the surface: 50 mg of the titanium dioxide powder obtained above was added to 80 mL of a mixed solution of water and methanol (methanol: water = 1:1), and ultrasonically dispersed for 15 minutes to uniformly disperse the titanium dioxide in the In the above mixed solution, accurately measure 0.065mL ch...

Embodiment 3

[0053] 1) Quickly add 9mL of hydrofluoric acid into 25mL of tetrabutyl titanate, stir the mixed solution under the action of a magnetic stirrer for 1 hour until the solution is evenly mixed, and then transfer the mixed solution to a 100mL Teflon-lined In the hydrothermal reaction kettle, the hydrothermal reaction was carried out at 160°C for 36 hours, and the obtained precipitate was washed repeatedly with distilled water and ethanol, then dried in an oven at 80°C for 16 hours, and ground, and placed in a muffle furnace at 500°C After calcining for 3 hours, titanium dioxide nanosheets can be obtained.

[0054] 2) Preparation of titanium dioxide nanosheets with platinum nanoparticles deposited on the surface: 50 mg of the titanium dioxide powder obtained above was added to 80 mL of a mixed solution of water and methanol (methanol: water = 1:3), and ultrasonically dispersed for 15 minutes to uniformly disperse the titanium dioxide in the In the above-mentioned mixed solution, ac...

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Abstract

The invention relates to a titanium dioxide-platinum-cobalt tetroxide ternary composite photocatalytic material and a preparation method thereof. Titanium dioxide-platinum-cobalt tetroxide ternary composite photocatalytic material uses titanium dioxide nanosheets with exposed {001} and {101} surfaces as carriers, platinum and cobalt tetroxide nanoparticles as co-catalysts, and platinum particles are loaded on {101} of titanium dioxide nanosheets. On the surface, cobalt tetroxide nanoparticles are supported on the {001} surface of titanium dioxide nanosheets. Its photocatalytic water decomposition efficiency is high, and the co-catalyst is closely combined with titanium dioxide, and has good long-term stability. It effectively solves the problem in the existing technology that photocatalyst electron holes are easily recombined, resulting in reduced photocatalytic efficiency.

Description

technical field [0001] The invention relates to the technical field of synthesis of photocatalytic materials, in particular to a titanium dioxide-platinum-cobalt tetraoxide ternary composite photocatalytic material and a preparation method thereof. Background technique [0002] With the development of modern technology, the problem of energy crisis and environmental pollution is becoming more and more serious. In order to solve the above problems, people continue to develop and innovate various methods, among which, the most promising one is to directly use the abundant solar energy resources to convert them into chemical energy, thereby reducing environmental pollution and solving the problem of energy shortage. In recent years, semiconductor photocatalytic water splitting hydrogen production technology has become an environmentally friendly green technology due to its clean and low-cost characteristics. It can convert low-density solar energy into high-density, storable hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C01B3/04
CPCC01B3/04B01J23/8913B01J35/39Y02E60/36
Inventor 余家国张军孟爱云
Owner WUHAN UNIV OF TECH
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