Composite visible-light catalyst for TiO2 microsphere and g-C3N4, as well as preparation method and application of catalyst

A technology of g-c3n4 and visible light, applied in the direction of light water/sewage treatment, etc., can solve the problem of low activity and achieve the effects of simple preparation process, improved separation and convenient operation

Inactive Publication Date: 2013-03-13
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite visible photocatalyst overcomes the single TiO 2 It has photocatalytic activity and a single g-C only under the

Method used

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  • Composite visible-light catalyst for TiO2 microsphere and g-C3N4, as well as preparation method and application of catalyst
  • Composite visible-light catalyst for TiO2 microsphere and g-C3N4, as well as preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Titanium sheet pretreatment: Titanium sheet pretreatment: Titanium sheet (length×width×thickness=48mm×15mm×0.16mm) was ultrasonically cleaned in acetone, isopropanol and ethanol for 15 minutes, and finally dried at 80°C , to obtain a clean titanium sheet.

[0029] (2) Add 1.0g-melamine and 1.0g NH to 40mL deionized water 4 F, Ultrasonic the mixed system (frequency: 40kHz) for 30 minutes to obtain a milky white suspension mixed system, then transfer it to a 70mL autoclave, add a clean titanium sheet, seal it and react it hydrothermally at 150°C for 72 hours, collect the precipitate and use Wash with deionized water several times until neutral and dry at 80°C for 12h, then put into a crucible and seal with aluminum paper, heat up to 550°C at a rate of 20°C / min and keep for 4h, and cool naturally to room temperature to obtain the catalyst. Electron microscope detection: The prepared catalyst is detected by electron microscope, the results are as follows figure 1 As s...

Embodiment 2

[0033] (1) Titanium sheet pretreatment: the same as in Example 1, the only difference is that the size of the selected titanium sheet is length×width×thickness=10mm×10mm×0.05mm.

[0034] (2) Add 2.0g-melamine and 1.0g NH to 100mL deionized water 4 F. Ultrasonic the mixed system for 30 minutes to obtain a milky white suspension mixed system, then transfer it to a 70mL autoclave, and add a clean titanium sheet, seal it and react with water at 150°C for 48 hours, collect the precipitate and wash it with deionized water It was then neutralized and dried at 80°C for 12 hours, then put into a crucible and sealed with aluminum paper, heated to 550°C at a rate of 20°C / min and kept for 4 hours, and naturally cooled to room temperature to obtain the catalyst. It can be seen that the obtained product is TiO by scanning electron microscopy and XRD 2 Microspheres and g-C 3 N 4 of composite materials.

[0035] (3) Acyclovir degradation: with embodiment 1. The photocatalytic degradation...

Embodiment 3

[0038] (1) Same as Example 1, except that the size of the selected titanium sheet is length×width×thickness=5mm×5mm×0.5mm.

[0039] (2) Add 1.0g-melamine and 1.0g NH to 40mL deionized water 4 F. Ultrasonic the mixed system for 30 minutes to obtain a milky white suspension mixed system, then transfer it to a 70mL high-pressure reactor, and add a clean titanium sheet, seal it and react it with water at 150°C for 24 hours, collect the precipitate and wash it with deionized water It was then neutralized and dried at 80°C for 12 hours, then put into a crucible and sealed with aluminum paper, heated to 550°C at a rate of 20°C / min and kept for 4 hours, and naturally cooled to room temperature to obtain the catalyst. It can be seen that the obtained product is TiO by scanning electron microscopy and XRD 2 Microspheres and g-C 3 N 4 of composite materials.

[0040] (3) Acyclovir degradation: with embodiment 1. The photocatalytic degradation experiment results showed that the degra...

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Abstract

The invention discloses a composite visible-light catalyst for TiO2 microsphere and g-C3N4, as well as a preparation method and an application of the catalyst. The preparation method comprises the following steps of: putting a cleaned titanium sheet to a mixed aqueous solution of melamine and ammonium fluoride to carry out a hydrothermal reaction; and collecting precipitate in a reaction solution after the reaction solution is cooled, cleaning the precipitate, drying and burning the cleaned precipitate to acquire the composite visible-light catalyst for TiO2 microsphere and g-C3N4. The composite visible-light catalyst overcomes the defects of low photo-transformation efficiency and low activity of a single material, has the advantages of an extensive photo-response range, high visible light catalytic activity and the like, and can be applied to the environment-friendly field, in particular an occasion that visible light catalyzes and degrades organic pollutants in water and kills pathogenic microorganisms in the water, thus the application prospect is extensive.

Description

technical field [0001] The invention relates to the technical field of visible light catalytic materials, in particular to a TiO 2 Microspheres and g-C 3 N 4 Composite visible light catalyst and its preparation method and application. Background technique [0002] A large amount of organic pollutants and pathogenic microorganisms accumulated in water bodies have always been the main culprits that cause a large number of human diseases. In order to ensure the health and safety of human drinking water, the traditional treatment method is to add a large amount of chlorine or ozone to the drinking water to achieve the purpose of disinfection and oxidation, but this method is prone to produce toxic by-products. The advanced oxidation technology developed in recent years, such as photocatalysis technology, especially titanium dioxide photocatalysis technology is considered to be one of the most promising new technologies in water treatment and disinfection. Photocatalytic tech...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30
Inventor 李桂英聂信安太成陈江耀史慧贤
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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