Preparation method and application of 3D ordered titanium dioxide inverse opal photonic crystal microsphere

A photonic crystal microsphere, titanium dioxide technology, applied in chemical instruments and methods, crystal growth, single crystal growth and other directions, can solve the problems of photonic crystal film shedding, difficult to prepare large area, limit sunlight utilization, etc. order, many surface active sites, and the preparation method is simple and easy to operate.

Active Publication Date: 2018-11-27
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are two-dimensional photonic crystal thin films and three-dimensional photonic crystals in photocatalysis research. However, photonic crystal thin films are easy to fall off from the base and are not easy to prepare in large areas. General three-dimensional photonic crystal materials have the property of angle bias , limiting its utilization of sunlight

Method used

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  • Preparation method and application of 3D ordered titanium dioxide inverse opal photonic crystal microsphere
  • Preparation method and application of 3D ordered titanium dioxide inverse opal photonic crystal microsphere
  • Preparation method and application of 3D ordered titanium dioxide inverse opal photonic crystal microsphere

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Embodiment 1

[0028] (1) Preparation of monodisperse polystyrene-methyl methacrylate-acrylic acid P(St-MMA-AA) pellets: Dissolve 0.4g ammonium persulfate, 0.8g ammonium bicarbonate and 2ml acrylic acid monomer in 10ml deionized In water, record it as solution A; take 250ml deionized water, 11ml styrene and 1ml methyl methacrylate monomer and add them into a three-necked flask to mix and stir, pass N 2 Protection, when the temperature of the liquid in the bottle rises to 70°C, quickly add solution A to the mixed liquid in the bottle; keep stirring at 70°C for 12 hours to obtain a uniform emulsion of 330nm;

[0029] (2) Preparation of three-dimensional ordered titanium dioxide inverse opal photonic crystal microspheres: Mix 0.85ml of P(St-MMA-AA) solution with a mass fraction of 15% and 100μl of titanium precursor solution, and inhale the solution evenly after ultrasonic dispersion 1ml syringe; at the same time, use a 10ml syringe to absorb 10ml of low-viscosity methyl silicone oil; connect t...

Embodiment 2

[0031] (1) Preparation of monodisperse polystyrene-methyl methacrylate-acrylic acid P(St-MMA-AA) pellets: Dissolve 0.4g ammonium persulfate, 0.8g ammonium bicarbonate and 2ml acrylic acid monomer in 10ml deionized In water, record it as solution A; take 250ml deionized water, 12ml styrene and 1ml methyl methacrylate monomer and add them into a three-necked flask for mixing and stirring, and pass through N 2 Protection, when the temperature of the liquid in the bottle rises to 70°C, quickly add solution A to the mixed liquid in the bottle; keep stirring at 70°C for 12 hours to obtain a uniform emulsion of 360nm;

[0032] (2) Preparation of three-dimensional ordered titanium dioxide inverse opal photonic crystal microspheres: mix 0.96ml of P(St-MMA-AA) solution with a mass fraction of 15% and 100μl of titanium precursor solution, and inhale the solution evenly after ultrasonic dispersion 1ml syringe; at the same time, use a 10ml syringe to absorb 10ml of low-viscosity methyl sil...

Embodiment 3

[0034] (1) Preparation of monodisperse polystyrene-methyl methacrylate-acrylic acid P(St-MMA-AA) pellets: Dissolve 0.4g ammonium persulfate, 0.8g ammonium bicarbonate and 2ml acrylic acid monomer in 10ml deionized In water, record as solution A; take 250ml of deionized water, 13ml of styrene and 1ml of methyl methacrylate monomer into a three-necked flask for mixing and stirring, and pass N 2 Protection, when the temperature of the liquid in the bottle rises to 70°C, quickly add solution A to the mixed liquid in the bottle; keep stirring at 70°C for 12 hours to obtain a uniform emulsion of 410nm;

[0035](2) Preparation of three-dimensional ordered titanium dioxide inverse opal photonic crystal microspheres: mix 1.01ml of P(St-MMA-AA) solution with a mass fraction of 15% and 100μl of titanium precursor solution, and inhale the solution after ultrasonic dispersion 1ml syringe; at the same time, use a 10ml syringe to draw 10ml of low-viscosity methyl silicone oil; connect the sy...

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Abstract

The invention discloses a preparation method and an application of a 3D ordered titanium dioxide inverse opal photonic crystal microsphere. The method comprises the following steps: (1) preparing a monodisperse polystyrene-methyl methacrylate-acrylic acid P (St-MMA-AA) microsphere; and (2) preparing a 3D ordered titanium dioxide inverse opal photonic crystal microsphere. According to the titaniumdioxide photonic crystal microsphere, the outer part of the microsphere has a close hexagonal deposited ordered structure, and the inner part of the microsphere has a porous structure, so that the problem that a conventional photonic crystal material has angle dependence can be solved. The 3D ordered titanium dioxide inverse opal photonic crystal microsphere is suitable for preparing a spherical photonic crystal structure with uniform size, has the advantages of large specific surface area, more surface active sites and the like, can be used for effectively improving separation of photon-generated carriers, increasing the rate of electron transmission, improving the solar utilization and enabling high photocatalytic performance.

Description

technical field [0001] The invention belongs to the technical field of green energy material manufacturing, and specifically relates to a preparation method and application of three-dimensionally ordered titanium dioxide inverse opal photonic crystal microspheres. Background technique [0002] With the development of social economy, the consumption of energy has increased dramatically, the reserves of non-renewable energy such as oil and natural gas have decreased, and the environmental pollution has become increasingly serious. Therefore, the demand for clean energy is more urgent. Hydrogen is considered to be an effective alternative form of green energy that can replace fossil fuels, and semiconductor materials based on photocatalytic photolysis of water for hydrogen production are the hope for converting solar energy into hydrogen energy. [0003] In order to make full use of the highly uniform periodic arrangement structure of photonic crystals and its advantages of goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/16C30B29/60C30B7/14
CPCC30B7/14C30B29/16C30B29/60
Inventor 苏宝连张若兰赵恒张荣聪秦熙森吴旻李昱刘婧
Owner WUHAN UNIV OF TECH
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