Preparation method of three-dimensional ordered macroporous titanium dioxide material

A titanium dioxide, three-dimensional ordered technology, applied in the field of preparation of three-dimensional ordered macroporous materials, can solve the problems of low preparation efficiency of three-dimensional ordered macroporous materials, material thickness and mechanical strength, etc., to overcome the difficult control of conditions and speed up the assembly speed , the effect of efficient assembly

Inactive Publication Date: 2013-03-20
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems that the preparation efficiency of three-dimensional ordered macroporous materials is low, and the material thickness and mechanical streng...

Method used

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  • Preparation method of three-dimensional ordered macroporous titanium dioxide material
  • Preparation method of three-dimensional ordered macroporous titanium dioxide material
  • Preparation method of three-dimensional ordered macroporous titanium dioxide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: in the polystyrene microsphere (particle diameter 340nm) emulsion of 30mL monodisperse (dispersion coefficient 0.0030), add 3mL titania sol (particle diameter 12nm), ultrasonic vibration mixes, obtains binary component mixed solution; The binary component mixture obtained above was placed in a glass vessel, and evaporated at a constant temperature for 5 hours at a temperature of 40°C to obtain a binary co-deposited solid; after roasting the above binary co-deposited solid at 480°C for 3 hours, cool slowly Finally, a three-dimensional ordered macroporous titanium dioxide material is obtained.

Embodiment 2

[0020] Embodiment 2: in the polystyrene microsphere (particle diameter 250nm) emulsion of 30mL monodisperse (dispersion coefficient 0.0030), add 3mL titania sol (particle diameter 16nm), ultrasonic vibration mixes, obtains binary component mixed solution; The binary component mixture obtained above was placed in a glass vessel, and evaporated at a constant temperature for 5 hours at a temperature of 60°C to obtain a binary co-deposition solid; after roasting the above binary co-deposition solid at 500 °C for 4 hours, slowly After cooling, a titanium dioxide / heteropolyacid composite photocatalyst is obtained. figure 1 It is a scanning electron micrograph of the three-dimensional ordered macroporous titanium dioxide material. figure 2 It is the pore structure analysis of three-dimensional ordered macroporous titania materials.

Embodiment 3

[0021] Example 3: In 30 mL of monodisperse (dispersion coefficient 0.0030) polystyrene microsphere (particle diameter: 380 nm) emulsion, add 3 mL of titanium dioxide sol (particle diameter: 20 nm) and mix with ultrasonic vibration to obtain binary component mixture; Put the binary component mixture obtained above in a glass vessel, and evaporate at a constant temperature for 6 hours at a temperature of 60°C to obtain a binary codeposited solid; after roasting the above binary codeposited solid at 520°C for 3 hours, After slow cooling, a three-dimensional ordered macroporous titania material is obtained. image 3 is the X-ray diagram of the three-dimensional ordered macroporous titanium dioxide material.

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Abstract

The invention discloses a preparation method of a three-dimensional ordered macroporous titanium dioxide material, and the preparation method comprises the following steps of: at a certain temperature, carrying out constant temperature evaporation and self-assembly on a binary-component mixed solution formed by monodisperse polystyrene microspheres emulsion and titanium dioxide sol to form a binary ordered material; and removing a template agent by roasting to form the three-dimensional ordered macroporous titanium dioxide material. In the three-dimensional ordered macroporous titanium dioxide material, titanium dioxide has anatase and a macroporous/ mesoporous double-pore structure; the average pore sizes of macropores and mesoporous are respectively 220-336nm and 3-6nm; and the specific surface area is 240-350m<2>/g. The aperture size of the three-dimensional ordered macroporous titanium dioxide material can be controlled and adjusted by the microsphere size of the template agent polystyrene.

Description

technical field [0001] The invention belongs to the field of preparation of three-dimensional ordered macroporous materials, in particular to the preparation technology of three-dimensional ordered macroporous titanium dioxide. Background technique [0002] Three-dimensional ordered macroporous materials have a series of characteristics such as strong periodicity of pore structure arrangement, narrow pore size distribution, uniform and adjustable pore size, and three-dimensional long-range order of the overall structure. They can be applied to catalyst carriers, filtration and separation materials, batteries and thermal resistance materials etc. [0003] At present, three-dimensional ordered macroporous materials are generally prepared by the colloidal crystal template method. The main steps are: (1) preparing monodisperse microspheres and assembling them into a colloidal crystal template; (3) remove the template and obtain a three-dimensional ordered macroporous material. ...

Claims

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Application Information

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IPC IPC(8): C01G23/053B82Y30/00
Inventor 刘士荣张晨倪忠斌陈明清
Owner JIANGNAN UNIV
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