Photocatalyst CN-ZnO and preparation method and application thereof

A photocatalyst and zinc compound technology, applied in the field of photocatalytic materials, can solve the problems of low methylene blue degradation rate, operator casualties, unstable catalytic activity of visible light catalysts, etc.

Inactive Publication Date: 2015-12-30
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this preparation method requires the use of corrosive chemical ammonium bifluoride, which will generate toxic fluoride when it meets water, which will not only pollute the environment, but may also cause casualties to operators. At the same time, the prepared cobalt-loaded The catalytic activity of mesoporous graphitic carbon nitride catalyst for visible light is not stable, and its degradation rate to methylene blue is only 45%.

Method used

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  • Photocatalyst CN-ZnO and preparation method and application thereof
  • Photocatalyst CN-ZnO and preparation method and application thereof
  • Photocatalyst CN-ZnO and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] (1) Accurately weigh 0.125g of zinc acetate with an electronic balance, fully dissolve it in 20ml of deionized water, then add 10g of melamine that has been weighed, and stir the mixed solution vigorously on a magnetic stirrer for 1 hour to make the solution well mixed. The stirred mixture was dried in vacuum at 80°C for 4h;

[0067] (2) Grind the dried mixture, place it in a crucible, cover it, and put it in a muffle furnace for calcination at 520°C for 6 hours, then cool it after calcination, and grind the cooled solid until the D50 particle size is 50nm , to prepare a CN-ZnO catalyst sample, denoted as g-C 3 N 4 -ZnO-6.

Embodiment 2～4

[0069] The method used in Examples 2-4 is similar to that of Example 1, the only difference is that the calcining time in step 2 is 8h, 10h and 12h respectively, and the photocatalysts obtained are respectively recorded as g-C 3 N 4 -ZnO-8, g-C 3 N 4 -ZnO-10 and g-C 3 N 4 -ZnO-12.

experiment example 1

[0076] The infrared spectrometry of experimental example 1 sample

[0077] The samples used in this embodiment are prepared from Examples 1-4 and Comparative Examples 1-2.

[0078] Operation method: Take a small amount of the above-mentioned photocatalyst samples, add them to potassium bromide powder respectively, grind the samples to mix evenly with potassium bromide, press them into thin slices, and use a Fourier transform infrared spectrometer to carry out infrared spectrum characterization of the catalysts. The results are as follows: figure 2 As shown, among them,

[0079] Curve a shows the infrared spectrum curve of the sample made in comparative example 2;

[0080] Curve b shows the infrared spectrum curve of the sample that embodiment 1 makes;

[0081] Curve c shows the infrared spectrum curve of the sample that embodiment 2 makes;

[0082] Curve d shows the infrared spectrum curve of the sample that embodiment 3 makes;

[0083] Curve e shows the infrared spectr...

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Abstract

The invention provides a photocatalyst CN-ZnO and a preparation method and application thereof. According to the photocatalyst CN-ZnO, nitrogen-containing organic matter and a zinc-containing compound serve as raw materials, and the photocatalyst containing graphite-phase carbon nitride (abbreviated as CN) and zinc oxide can be prepared through a hydrothermal method, is a composition and has a good catalytic degradation effect on organic dye and particularly azo type organic dye such as methyl orange under visible light.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and relates to an inorganic photocatalyst and its preparation method and application. Background technique [0002] In recent years, with the rapid development of industrial production, the problems of energy and environmental pollution have been widely concerned by people. The requirements for industrial pollution control technology are increasing, and there are more and more researches on photocatalytic technology in environmental control. The use of solar energy to photocatalyze the degradation of pollutants has been one of the hotspots of research. Under the irradiation of light, semiconductor materials can promote the synthesis of compounds or degrade compounds by converting light energy into chemical energy. This is the so-called photocatalytic technology. [0003] Usually TiO 2 As a catalyst for environmental purification, for example, Huang Juanru et al reported TiO in Industria...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCY02W10/37
Inventor 李慧泉崔玉民苗慧
Owner FUYANG NORMAL UNIVERSITY
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