Preparation method and application of oxygen-doped graphite-phase carbon nitride ozone catalyst

A graphite-phase carbon nitride and catalyst technology, which is applied in the field of water pollution control, can solve problems such as metal ion dissolution, environmental pollution, and catalyst activity reduction, and achieve the effects of accelerated degradation and removal, broad application prospects, and improved efficiency

Active Publication Date: 2017-05-24
WUHAN TEXTILE UNIV
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Problems solved by technology

[0004] In view of the above-mentioned defects in the prior art, the main purpose of the present invention is to provide a preparation method and application of an oxygen-doped graphite phase carbon nitride ozone catalyst. The present invention uses inorganic carbon nitrogen materials for the ozone catalytic process, which solves the problem of traditional After the reaction of the metal catalyst, some metal ions are dissolved out, resulting in the reduction of catalyst activity and further environmental pollution.

Method used

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  • Preparation method and application of oxygen-doped graphite-phase carbon nitride ozone catalyst
  • Preparation method and application of oxygen-doped graphite-phase carbon nitride ozone catalyst
  • Preparation method and application of oxygen-doped graphite-phase carbon nitride ozone catalyst

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preparation example Construction

[0032] Such as figure 1 As shown, the preparation method of the oxygen-doped graphite phase carbon nitride ozone catalyst in the embodiment of the present invention includes the following steps:

[0033] Provide a first solution, the first solution comprising uniformly mixed g-C 3 N 4 Powder and H 2 O 2 ;

[0034] Stir the first solution ultrasonically to obtain the reactant;

[0035] Subjecting the reactant to a hydrothermal synthesis reaction to obtain a mixture;

[0036] Cool the mixture to remove H 2 O 2 After the residue is dried and ground, an oxygen-doped graphite phase carbon nitride ozone catalyst is obtained.

[0037] The g-C 3 N 4 The preparation method includes: roasting melamine and cooling to obtain g-C in the form of light yellow powder 3 N 4 , Grinding.

[0038] g-C 3 N 4 It has the typical characteristics of a semiconductor. It is non-toxic, high in quantum efficiency, and has good stability. It is a narrow band gap semiconductor. At the same time, it also has the advan...

Embodiment 1

[0044] g-C 3 N 4 Preparation

[0045] Weigh a certain amount of melamine into the crucible, put the crucible into the muffle furnace, and fire at a heating rate of 5°C / min and 550°C for 2 hours. After the crucible is cooled, take it out to obtain a light yellow powder of g-C 3 N 4 , Grind, set aside.

[0046] O / g-C 3 N 4 Preparation

[0047] Weigh 1g g-C 3 N 4 The powder is dissolved in 50ml 10mol / L H 2 O 2 In an ultrasonic cleaner, vigorously ultrasonically stir at 30°C for 2h, then transfer the sample to a hydrothermal reactor, place the reactor in an electric blast drying oven, and hydrothermally synthesize at 140°C for 10h, and wait until the reactor is cooled to Take it out after room temperature, centrifuge and wash the obtained sample several times until there is no H 2 O 2 Residue, and finally put the sample into an electric heating constant temperature blast drying oven, dry at 70 ℃, and grind to obtain the desired catalyst.

[0048] O / g-C prepared in Example 1 of the present...

Embodiment 2

[0052] g-C 3 N 4 Preparation

[0053] Weigh a certain amount of melamine into the crucible, put the crucible into the muffle furnace, and fire at a heating rate of 5°C / min and 500°C for 4 hours. After the crucible is cooled, take it out to obtain a light yellow powder of g-C 3 N 4 , Grind, set aside.

[0054] O / g-C 3 N 4 Preparation

[0055] Weigh 1g g-C 3 N 4 The powder is dissolved in 50ml5mol / L H 2 O 2 In an ultrasonic cleaner, stir vigorously at 40°C for 100 minutes, then transfer the sample to a hydrothermal reactor, place the reactor in an electric blast drying oven, and hydrothermally synthesize at 140°C for 6 hours, and wait until the reactor is cooled to Take it out after room temperature, centrifuge and wash the obtained sample several times until there is no H 2 O 2 Residue, finally put the sample into an electric heating constant temperature blast drying oven, dry at 80°C, and grind to obtain the desired catalyst.

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Abstract

The invention provides a preparation method and application of an oxygen-doped graphite-phase carbon nitride ozone catalyst. The preparation method comprises the following steps that a first solution is prepared, wherein the first solution contains g-C3N4 powder and H2O2 which are mixed evenly and is ultrasonically stirred to obtain a substance about to react; hydrothermal synthesis reaction is conducted on the substance about to react to obtain a mixture; the mixture is cooled, H2O2 residues are removed, and then drying and grinding are performed to obtain the oxygen-doped graphite-phase carbon nitride ozone catalyst. Inorganic carbon and nitrogen materials are used for ozone catalysis process, and the problem that after reaction of traditional metal catalysts, part of metal ions is dissolved and accordingly catalyst activity reduction, further environmental pollution and the like are caused is solved.

Description

Technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a preparation method and application of an oxygen-doped graphite phase carbon nitride ozone catalyst. Background technique [0002] With the increasing population, the demand for synthetic pesticides is increasing. A large number of pesticides are produced, sold and used to resist pests and diseases, weeding and promoting crop growth. Atrazine, also known as atrazine (ATZ), is a herbicide with moderate to low toxicity and has been widely used all over the world. According to statistics, the demand for atrazine in my country in 2007 was more than 5,000 tons. Since most pesticides have moderate environmental persistence, long-term large-scale use of pesticides will cause micro-pollution of environmental water bodies. In recent years, there have been reports of ATZ detection incidents in surface water and drinking water. Existing studies have shown that ATZ ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C02F1/78C02F101/38C02F101/36
CPCC02F1/725C02F1/78B01J27/24C02F2101/306C02F2305/023C02F2305/10C02F2101/36C02F2101/38B01J35/61
Inventor 袁向娟夏东升孙磊李东亚徐海明曹刚谢锐莉张琪
Owner WUHAN TEXTILE UNIV
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