Method for preparing macroporous hollow-sphere titanium oxide photocatalytic material

A photocatalytic material, hollow sphere technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low photon quantum yield, easy deactivation of catalysts, and reduced photocatalytic activity.

Inactive Publication Date: 2014-04-30
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, TiO 2 The low photon quantum yield and the easy recombination of photogenerated electrons and holes reduce the photocatalytic activity, and the recycling and reuse of catalysts has become a widely concerned issue in practical applications.
Nano powder TiO 2 When the catalyst is used to eliminate pollutants in water, there are disadvantages such as difficulty in catalyst recovery, easy deactivation of the catalyst, and the need to rely on dynamic stirring to maintain the suspension of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a macroporous hollow spherical titanium oxide photocatalytic material, characterized in that: using self-made colloidal carbon spheres as a template, the macroporous hollow spherical titanium oxide photocatalytic material is prepared by a sol-gel method; specifically including the following Described process steps:

[0021] (1) Preparation of carbon sphere template

[0022] Transfer 50 mL of 0.5 mol / L glucose solution into a 100 mL stainless steel autoclave lined with polytetrafluoroethylene. After tightening the lid, keep the autoclave in an oven at 180 °C for 12 h, and wait for the autoclave to cool down to At room temperature, the product was centrifuged for 30 min (the centrifuge speed was 10,000 rpm). The centrifuged product was repeatedly washed with distilled water and absolute ethanol four times, and the final product was dried at 80 °C for 4 h to prepare colloidal carbon spheres for future use.

[0023] (2) TiO 2 Preparation of hollow ...

Embodiment 2

[0026] A method for preparing a macroporous hollow spherical titanium oxide photocatalytic material, characterized in that: using self-made colloidal carbon spheres as a template, the macroporous hollow spherical titanium oxide photocatalytic material is prepared by a sol-gel method; specifically including the following Described process steps:

[0027] (1) Preparation of carbon sphere template

[0028] Transfer 50 mL of 1 mol / L glucose solution into a 100 mL stainless steel autoclave with polytetrafluoroethylene lining, tighten the lid and keep the autoclave in an oven at 180 °C for 12 h, and wait for the autoclave to cool down to At room temperature, the product was centrifuged for 30 min (the centrifuge speed was 10,000 rpm). The centrifuged product was washed four times with distilled water and absolute ethanol, respectively, and the final product was dried at 80 °C for 4 h to obtain colloidal carbon spheres for future use.

[0029] (2) TiO 2 Preparation of hollow spher...

Embodiment 3

[0032] A method for preparing a macroporous hollow spherical titanium oxide photocatalytic material, characterized in that: using self-made colloidal carbon spheres as a template, and adopting a sol-gel method to prepare a macroporous hollow spherical titanium oxide photocatalytic material; specifically including the following Described process steps:

[0033] (1) Preparation of carbon sphere template

[0034] Transfer 50 mL of 2 mol / L glucose solution into a 100 mL stainless steel autoclave with polytetrafluoroethylene lining. After tightening the lid, keep the autoclave in an oven at 180 °C for 12 h, and wait for the autoclave to cool down to At room temperature, the product was centrifuged for 30 min (the centrifuge speed was 10,000 rpm). The centrifuged product was washed four times with distilled water and absolute ethanol, respectively, and the final product was dried at 80 °C for 4 h to obtain colloidal carbon spheres for future use.

[0035] (2) TiO2 Preparation of h...

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Abstract

The invention discloses a method for preparing a macroporous hollow-sphere titanium oxide photocatalytic material for photocatalytic degradation of pollutants. The method aims to provide a macroporous hollow-sphere titanium oxide preparation technique to obtain a material with optimal degradation capacity. The method comprises the following steps: by using a glucose solution as a raw material, preparing colloid carbon spheres under hydrothermal conditions; and by using tetra-n-butyl titanate as a precursor, preparing a uniform-particle high-activity high stability macroporous hollow-sphere titanium oxide photocatalyst by sol-gel and calcination processes. The keys of the preparation process are synthesis of the colloid carbon spheres and the sol-gel technique. The method has the advantages of simple technique, mild conditions and favorable repetitiveness, can be widely used for photocatalytic degradation of organic pollutants, and has wide application prospects in the aspect of environmental treatment.

Description

technical field [0001] The invention relates to a method for preparing an environmental purification functional material, in particular to a method for preparing a macroporous hollow spherical titanium oxide photocatalytic material. Background technique [0002] Macroporous materials (Macroporous materials) pore size greater than 50 nm. The pore structure in the macroporous material can become a channel for adsorbate molecules to enter the pore structure. Macroporous materials have the characteristics of large specific surface area, low density, low refractive index, and low thermal expansion coefficient, making macroporous hollow materials widely used in catalyst supports, anti-radiation surface materials, rechargeable batteries, etc. Macroporous hollow materials have unique and excellent photocatalytic properties, not only because of the increased specific surface area, but also the hollow structure can stabilize their active centers. In the hollow shell structure partic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/08
Inventor 张文杰
Owner SHENYANG LIGONG UNIV
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