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Three-dimensional ordered macroporous calcium titanate photonic crystal which is constructed by porous nano-sheets and synthesis method of calcium titanate photonic crystal

A three-dimensional ordered, porous calcium titanate technology, applied in the direction of titanate, titanium compound, alkaline earth metal titanate, etc., can solve the problem of unutilized lamella structure, achieve excellent photocatalytic performance, mild reaction conditions , the effect of easy promotion

Inactive Publication Date: 2018-05-01
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Calcium titanate itself has a two-dimensional layered structure. However, the calcium titanate obtained by traditional preparation methods is mostly a block structure, and the advantages of its lamellar structure have not been utilized.

Method used

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  • Three-dimensional ordered macroporous calcium titanate photonic crystal which is constructed by porous nano-sheets and synthesis method of calcium titanate photonic crystal
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  • Three-dimensional ordered macroporous calcium titanate photonic crystal which is constructed by porous nano-sheets and synthesis method of calcium titanate photonic crystal

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Embodiment 1

[0042] A three-dimensional ordered macroporous calcium titanate photonic crystal constructed of porous nanosheets, the preparation method of which comprises the following steps:

[0043] 1) Synthesis of monodisperse polystyrene beads:

[0044] Add 30ml of styrene and 300ml of deionized water into a 500ml three-necked flask, mix and stir, and pass nitrogen protection gas. When the temperature rises to 70-80°C, quickly add 0.3g of potassium persulfate initiator, and stir for 5 hours. The whole reaction is under nitrogen. Carried out under atmosphere; the homogeneous white emulsion obtained after the reaction is subjected to rotary evaporation to remove unreacted styrene monomer to obtain monodisperse polystyrene beads;

[0045] 2) Pour the monodisperse polystyrene pellets obtained in step 1) into a 1L beaker, and add deionized water to make the volume 500ml. After ultrasonic treatment for 0.5h, place it in an oven at 40°C for 3 to 4 days to obtain polystyrene Styrene colloid te...

Embodiment 2

[0056] A three-dimensional ordered macroporous calcium titanate photonic crystal constructed of porous nanosheets, the preparation method of which comprises the following steps:

[0057] 1) Synthesis of monodisperse polystyrene beads:

[0058] Add 60ml of styrene and 300ml of deionized water into a 500ml three-necked flask, mix and stir, pass nitrogen protection gas, wait for the temperature to rise to 70-80°C, quickly add 0.3g of potassium persulfate initiator, stir and react for 5 hours, and the whole reaction is under nitrogen Carried out under the atmosphere; the homogeneous white emulsion obtained after the reaction is subjected to rotary evaporation to remove unreacted styrene monomer to obtain monodisperse polystyrene beads, see Figure 8 ;

[0059] 2) Pour the monodisperse polystyrene pellets obtained in step 1) into a 1L beaker, and add deionized water to make the volume 500ml. After ultrasonic treatment for 0.5h, place it in an oven at 40°C for 3 to 4 days to obtain...

Embodiment 3

[0065] A three-dimensional ordered macroporous calcium titanate photonic crystal constructed of porous nanosheets, the preparation method of which comprises the following steps:

[0066] 1) Synthesis of monodisperse polystyrene beads:

[0067] Add 30ml of styrene and 300ml of deionized water into a 500ml three-necked flask, mix and stir, and pass nitrogen protection gas. When the temperature rises to 70-80°C, quickly add 0.3g of potassium persulfate initiator, and stir for 5 hours. The whole reaction is under nitrogen. Carried out under atmosphere; the homogeneous white emulsion obtained after the reaction is subjected to rotary evaporation to remove unreacted styrene monomer to obtain monodisperse polystyrene beads;

[0068] 2) Pour the monodisperse polystyrene pellets obtained in step 1) into a 1L beaker, and add deionized water to make the volume 500ml. After ultrasonic treatment for 0.5h, place it in an oven at 40°C for 3 to 4 days to obtain polystyrene Styrene colloid te...

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Abstract

The invention discloses a calcium titanate photonic crystal which has a three-dimensional ordered macroporous structure and is constructed by porous nano-sheets. A synthesis method of the calcium titanate photonic crystal comprises the steps of: firstly synthesizing polystyrene nano-spheres of uniform size by adopting a surfactant-free emulsion polymerization method, performing solvent volatilization assembly to form a colloidal crystal template, then filling calcium titanate precursors into the colloidal crystal template by utilizing a sol-gel method, and then performing calcination to obtainthe catalyst which has a three-dimensional ordered macroporous calcium titanate photonic crystal structure and is constructed by macroporous nano-sheets. The product obtained by using the synthesis method has a complete three-dimensional ordered macroporous structure, and a structural unit is a calcium titanate nano-sheet of a micropore mesoporous structure, so that advantages of a three-dimensional ordered macroporous structure, a grade pore structure and a two-dimensional nano-sheet layer structure are integrated, and the product has excellent photocatalytic performance; in addition, the calcium titanate photonic crystal has simple synthesis conditions, low cost and high repeatability, a prepared sample has complete morphology, and the calcium titanate photonic crystal is suitable for popularization and application.

Description

technical field [0001] The invention belongs to inorganic nano functional materials, in particular to a three-dimensional ordered macroporous calcium titanate photonic crystal constructed by porous nanosheets and a synthesis method thereof. Background technique [0002] Photonic crystal materials with three-dimensional ordered macropore structure have unique structural and functional properties, and have always been a research hotspot in the field of materials. They have very broad application prospects in the fields of catalysis, optics, and electronics. The colloidal crystal hard template method is the most commonly used synthetic method for the preparation of three-dimensional ordered macroporous structure photonic crystal materials. The complete order of the assembly of colloidal crystal template spheres is a crucial factor in determining the three-dimensional ordered macroporous structure, and the monodispersity of polystyrene spheres determines the quality of colloidal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00B01J23/02B01J35/10B01J37/08
CPCC01G23/006B01J23/02B01J37/0018C01P2004/62C01P2004/60C01P2004/64B01J35/643B01J35/647B01J35/39
Inventor 李昱赵恒王超刘婧吴旻王洪恩陈丽华阳晓宇苏宝连
Owner WUHAN UNIV OF TECH
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