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Photocatalyst as well as preparation method and application thereof

A photocatalyst and cobalt ion technology, applied in the field of photocatalysis, can solve the problems that hinder the actual production and application of TiO2, fast photogenerated electron-hole recombination rate, narrow light absorption range, etc.

Active Publication Date: 2020-10-20
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 There are two key problems: the narrow light absorption range and the fast recombination rate of photogenerated electron-hole pairs, which seriously hinder the TiO 2 actual production application
However, traditional non-metal doped TiO 2 The preparation method has obvious drawbacks, such as the need to add organic sources and the accumulation of organic components

Method used

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  • Photocatalyst as well as preparation method and application thereof
  • Photocatalyst as well as preparation method and application thereof
  • Photocatalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Embodiment 1 is an embodiment of the preparation method of the photocatalyst of the present invention, and the preparation method of the photocatalyst of this embodiment comprises the following steps:

[0026] (1) Prepare 10mL N,N-dimethylformamide and methanol mixed solution (V N,N-二甲基甲酰胺 :V 甲醇 =9:1), then add 3mmol of 2-aminoterephthalic acid, fully stir to dissolve, add 1mmol of tetrabutyl titanate, stir at room temperature for 30min, then put it into a polytetrafluoroethylene reactor and react at 150°C for 36 Hours, after the reaction, cool to room temperature, wash with N,N-dimethylformamide and methanol three times, and then centrifuge and dry to obtain NH 2 - MIL-125(Ti) powder;

[0027] (2) 1g of NH produced in step (1) 2 -MIL-125(Ti) powder was dispersed in 100mL of cobalt acetate solution with a concentration of 0.5mg / mL, stirred for 30min, filtered and washed with deionized water, dried to obtain Co-TiMOF, and then Co-TiMOF was heated at 2°C / mL The heatin...

Embodiment 2

[0029] Example 2 is an embodiment of the preparation method of the photocatalyst of the present invention. The preparation method of the photocatalyst in this example is the same as the preparation method of Example 1 except that the concentration of the cobalt acetate solution is 1 mg / mL; and the obtained The photocatalyst is sponge three-dimensional CoTiO 3 / C-TiO 2 -2 photocatalyst.

Embodiment 3

[0031] Example 3 is an embodiment of the preparation method of the photocatalyst of the present invention. The preparation method of the photocatalyst in this example is the same as the preparation method of Example 1 except that the concentration of the cobalt acetate solution is 1.5 mg / mL; and The resulting photocatalyst is a sponge three-dimensional CoTiO 3 / C-TiO 2 -3 photocatalyst.

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Abstract

The invention discloses a photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysis. The preparation method comprises the following steps: dipping and depositing NH2-MIL-125 (Ti) in a cobalt ion solution, and burning to obtain the sponge three-dimensional CoTiO3 / C-TiO2 II type heterojunction photocatalyst. The three-dimensional CoTiO3 / C-TiO2 II type heterojunction photocatalyst not only has a very large specific surface area and can provide more reaction active sites for catalytic reaction, but also introduces a carbon source toenhance the light absorption. The photo-generated charge transfer type of CoTiO3 / TiO2 is changed from I type to II type, the compounding of photo-generated charges is effectively inhibited, and the photocatalytic degradation activity of titanium dioxide is greatly improved. The preparation method of the photocatalyst is simple, the obtained photocatalyst is novel in structure, efficient photocatalytic activity and good stability for antibiotic degradation are shown under the action of visible light, and the actual application prospect of the titanium dioxide photocatalyst is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a photocatalyst and its preparation method and application. Background technique [0002] In the past few decades, with the rapid development of drugs, antibiotics have been widely used and even abused in the treatment of humans and animals. Because antibiotics are resistant to biodegradation and their chemical structures are relatively stable, traditional wastewater treatment techniques cannot effectively remove the antibiotics contained therein. Today, antibiotics are left in large quantities in different environments, such as rivers, groundwater, soil, and even the food on our table. Studies have shown that even trace concentrations (ng / L) of antibiotic residues may lead to the emergence of antibiotic-resistant bacteria, thereby posing a threat to human health. Therefore, it is necessary to find an effective method to completely remove antibiotic residues in wastewater....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C02F1/30C02F101/30
CPCB01J23/75C02F1/30C02F2305/10C02F2101/30B01J35/39Y02W10/37
Inventor 陈志鸿彭琰楠李珊珊胡春
Owner GUANGZHOU UNIVERSITY
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