Preparation method of multi-component porous visible-light-induced photocatalyst with hierarchical structure

A hierarchical structure, visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effects of excellent photocatalytic performance, low cost, simple and flexible preparation methods

Inactive Publication Date: 2015-06-17
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has certain limitations, that is, due to TiO 2 The forbidden band width is about 3.2eV, and only the ultraviolet part of sunlight can be used. Since the ultraviolet part is less than 5% in the solar spectrum, the visible part of sunlight (accounting for about 50% of the total energy of sunlight) is increased. The absorption efficiency is improved by TiO 2 An Efficient Path to Photocatalytic Efficiency

Method used

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  • Preparation method of multi-component porous visible-light-induced photocatalyst with hierarchical structure
  • Preparation method of multi-component porous visible-light-induced photocatalyst with hierarchical structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Wash the shells of commercially available eggs and peel off the egg membranes. Wash the egg membrane, dry it, and save it for future use. Then immerse the egg membrane in a solution mixed with tetra-n-butyl titanate, absolute ethanol, and concentrated hydrochloric acid in a ratio of 12:3:1. After soaking for 10 hours, take it out, wash it with absolute alcohol first, and then wash it with deionized water. After natural drying, put it in an oxidation furnace for calcination, and increase the temperature from room temperature to 500 °C at a rate of 36 ° C / min. °C for 90 min and then cooled to room temperature with the furnace to obtain a titanium dioxide matrix. To 0.03mol / L CdCl 2 Add concentrated ammonia water drop by drop until the solution turns from white turbidity to clear again to obtain the cadmium salt impregnation precursor. Put the matrix material into the cadmium salt impregnation precursor solution and soak it for 4.5h, take it out, wash it with deionized ...

Embodiment 2

[0032] Wash the shells of commercially available eggs and peel off the egg membranes. Wash the egg membrane, dry it, and save it for future use. Dip the egg membrane into a solution mixed with tetra-n-butyl titanate, absolute ethanol, and concentrated hydrochloric acid in a ratio of 12:3:1. Take it out after soaking for 10 hours, wash it with absolute alcohol first, then wash it with deionized water, after natural drying, put it in an oxidation furnace for calcination treatment, and raise the temperature from room temperature to 800 °C at a rate of 36 ° C / min °C for 90 min and then cooled to room temperature with the furnace to obtain a titanium dioxide matrix. To 0.03mol / L CdCl 2 Add concentrated ammonia water drop by drop until the solution turns from white turbidity to clear again to obtain the cadmium salt impregnation precursor. Put the matrix material into the cadmium salt impregnation precursor solution and soak it for 4.5h, take it out, wash it with deionized water,...

Embodiment 3

[0034] Wash the shells of commercially available eggs and peel off the egg membranes. Wash the egg membrane, dry it, and save it for future use. Dip the egg membrane into a solution mixed with tetra-n-butyl titanate, absolute ethanol, and concentrated hydrochloric acid in a ratio of 12:3:1. After soaking for 10 hours, take it out, wash it with absolute alcohol first, and then wash it with deionized water. After natural drying, put it in an oxidation furnace for calcination, and increase the temperature from room temperature to 500 at a rate of 18°C / min. °C for 90 min and then cooled to room temperature with the furnace to obtain a titanium dioxide matrix. To 0.03mol / L CdCl 2 Add concentrated ammonia water drop by drop until the solution turns from white turbidity to clear again to obtain the cadmium salt impregnation precursor. Put the matrix material into the cadmium salt impregnation precursor solution and soak it for 4.5h, take it out, wash it with deionized water, and p...

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Abstract

The invention discloses a preparation method of a multi-component porous visible-light-induced photocatalyst with a hierarchical structure. The preparation method comprises the following steps: pre-treating a natural biological material having a three-dimensional porous structure to take the natural biological material as a template; preparing a metal oxide nanometer material having a three-dimensional porous hierarchical structure through the template to take the metal oxide nanometer material as a matrix; and depositing a composite semiconductor nanometer material on the metal oxide matrix to finally prepare a composite nanometer material having a multi-component porous hierarchical structure. According to the method disclosed by the invention, the biological materials having three-dimensional hierarchical structures can be extensively selected as the template, the process is simple and flexible, the cost is low, and the composite nanometer material can be obtained by regulating and controlling the technological parameters and different template structures, and the like. The composite material prepared by the invention can be used as a visible-light-induced photocatalyst, and the composite material can quickly and effectively degrade organic pollutants under the irradiation of visible light, so that the composite material has an important application prospect in such fields as environmental protection, etc.

Description

technical field [0001] The invention relates to a method for preparing a photocatalyst, in particular to a method for preparing a visible light catalyst with a multi-component porous hierarchical structure Background technique [0002] While industrial civilization has brought more convenience and comfortable life to human beings, it has also caused environmental pollution problems. Therefore, how to prepare new environmentally friendly materials that can promote the effective and rapid degradation of pollutants has always been a focus of attention. [0003] In recent years, photocatalytic oxidation technology has shown attractive application prospects in the treatment of environmental pollutants. Airbrush and titanium dioxide materials have the characteristics of good visible light transmission, strong ultraviolet light absorption performance, and high chemical activity. Therefore, they have great potential in the storage and utilization of solar energy, photocatalytic con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J35/10B01J27/04
Inventor 苏慧兰石一杉张荻高婧王心瑶
Owner SHANGHAI JIAOTONG UNIV
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