Composite photocatalyst CN-CNI as well as preparation method and application thereof

A technology of catalyst and compound light, which is applied in chemical instruments and methods, light water/sewage treatment, water/sludge/sewage treatment, etc. Low performance and other issues

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

AI Technical Summary

Problems solved by technology

[0003] However, most of the widely used photocatalysts are ultraviolet photocatalysts, that is, they have good photocatalytic efficiency in the presence of ultraviolet light, but the content of ultraviolet light in sunlight is small, and ultraviolet light is harmful to the human body. However, most of the sunlight is visible light, and visible light has no obvious harm to the human body. Therefore, the development of a catalyst that can perform photocatalytic reactions under visible light conditions ha

Method used

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  • Composite photocatalyst CN-CNI as well as preparation method and application thereof
  • Composite photocatalyst CN-CNI as well as preparation method and application thereof
  • Composite photocatalyst CN-CNI as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] (1) Accurately weigh 2.0g (DCDA) dicyandiamide and pour it into a clean and dry small beaker, then accurately weigh 1.0g ammonium iodide under light-proof conditions and pour it into a small beaker to mix with dicyandiamide, Then use a graduated cylinder to measure 10mL of distilled water and add it to the small beaker, then shake it well, put the small beaker into a digital display constant temperature water bath at 80°C and evaporate it to dryness. During the evaporation process, the small beaker should be shaken properly, and the sample will be evaporated to dryness. It takes about 5 hours. After evaporating to dryness, put the sample in an electric blast constant temperature drying oven to dry for about an hour, then take out the small beaker, crush the sample and grind it in a mortar;

[0076] (2) Put the ground sample into a clean small crucible, cover the lid, and put it into the muffle furnace (when the temperature of the muffle furnace is below 150°C, put the sa...

Embodiment 2～10

[0080] The operation method of embodiment 2~10 is similar to embodiment 1, and difference only is that the add-on of dicyandiamide in step (2) is successively respectively 2.0g, 4.0g, 8.0g, 0.1g, 0.2g, 0.3g, 0.01g, 0.02g and 0.05g, the prepared samples are respectively recorded as CNI-CN 2.0 、CNI-CN 4.0 、CNI-CN 8.0 、CNI-CN 0.1 、CNI-CN 0.2 、CNI-CN 0.3 、CNI-CN 0.01 、CNI-CN 0.02 、CNI-CN 0.05 .

experiment example 1

[0087] Infrared Spectrometry of Experimental Example 1 Sample

[0088] The samples used in this experimental example are the samples prepared in Example 10, Comparative Example 1 and Comparative Example 2.

[0089] Operation method: use WQF-501 Fourier transform infrared spectrometer to carry out infrared spectrum characterization experiment (KBr tablet) on the above samples, the results are as follows figure 1 As shown, among them,

[0090] Curve a represents the sample that embodiment 10 makes (CNI-CN 0.05 );

[0091] Curve b represents the sample (CNI) that comparative example 1 makes;

[0092] Curve c represents the sample (CN) prepared in Comparative Example 2.

[0093] Depend on figure 1 It can be seen that:

[0094] Sample at 810cm -1 、1238cm -1 and 1329cm -1 There are strong absorption peaks at all places, among which, the wavenumber is 810cm -1 The absorption peak can be attributed to the bending vibration of the triazine ring, it can be considered that th...

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Abstract

The invention provides a composite photocatalyst CN-CNI as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, mixing nitrogen-containing organic matters with iodine-containing compounds, preparing the mixture into iodine-doped graphite phase carbon nitride, then mixing the iodine-doped graphite phase carbon nitride with the nitrogen-containing organic matter again, and finally preparing the mixture into the composite photocatalyst CN-CNI through a hydrothermal method. The preparation method is mild in process conditions, simple in operation and easy to realize, and the prepared composite photocatalyst is capable of carrying out catalytic degradation on dye-containing sewage under the condition that visible light exists and is high in catalytic degradation efficiency.

Description

technical field [0001] The invention relates to the field of inorganic composite materials, in particular to a composite photocatalyst CN-CNI and its preparation method and application. Background technique [0002] As a "green" technology, photocatalytic technology has many advantages incomparable with traditional water pollution treatment technologies in terms of water pollution control, such as: (1) easy operation and low energy consumption; (2) photocatalytic The reaction can generally be carried out under normal temperature and pressure conditions, the required reaction conditions are mild, and inorganic and organic pollutants can be partially or completely degraded, so that many environmental pollutants can be degraded to generate H 2 O and CO 2 , will not produce secondary pollution; (3) sunlight can be used as a light source; (4) some photocatalysts are low in cost, low in toxicity or even non-toxic, high in stability and can be reused. Photocatalytic technology ca...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F1/58
Inventor 李慧泉崔玉民苗慧
Owner FUYANG NORMAL UNIVERSITY
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