A kind of preparation method and application of oxygen-doped graphite phase carbon nitride ozone catalyst

A graphite-phase carbon nitride and catalyst technology, 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: 2019-09-17
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.

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  • A kind of preparation method and application of oxygen-doped graphite phase carbon nitride ozone catalyst
  • A kind of preparation method and application of oxygen-doped graphite phase carbon nitride ozone catalyst
  • A kind of 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 Shown, the preparation method of the oxygen-doped graphite phase carbon nitride ozone catalyst of the embodiment of the present invention, described method comprises the steps:

[0033] providing a first solution comprising g-C mixed homogeneously 3 N 4 Powder and H 2 o 2 ;

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

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

[0036] The mixture was cooled 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 semiconductors, it is non-toxic, has high quantum efficiency and good stability, and belongs to narrow band gap semiconductors. At the s...

Embodiment 1

[0044] g-C 3 N 4 preparation of

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

[0046] O / g-C 3 N 4 preparation of

[0047] Weigh 1g g-C 3 N 4 Powder dissolved in 50ml 10mol / L H 2 o 2 In the ultrasonic cleaner, 30°C was vigorously ultrasonically stirred for 2 hours, and then the sample was transferred to a hydrothermal reaction kettle, and the reaction kettle was placed in an electric blast drying oven, and hydrothermally synthesized at 140°C for 10 hours, and the reaction kettle was cooled to After taking it out at room temperature, the obtained sample was centrifuged and washed several times until there was no H 2 o 2 residue, and finally put the sample into an electrothermal constant temperature blast drying oven, dry it at 70°C, and grind i...

Embodiment 2

[0052] g-C 3 N 4 preparation of

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

[0054] O / g-C 3 N 4 preparation of

[0055] Weigh 1g g-C 3 N 4 The powder is dissolved in 50ml5mol / L H 2 o 2 In the ultrasonic cleaner, 40°C was vigorously ultrasonically stirred for 100 min, then the sample was transferred to a hydrothermal reaction kettle, and the reaction kettle was placed in an electric blast drying oven, and hydrothermal synthesis was carried out at 140°C for 6 hours, and the reaction kettle was cooled to After taking it out at room temperature, the obtained sample was centrifuged and washed several times until there was no H 2 o 2 residue, and finally put the sample into an electrothermal constant temperature blast drying oven, dry it at 80°C,...

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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 artificially synthesized pesticides is increasing, and a large number of pesticides are produced, sold and used to resist pests and diseases, weed control and promote 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, in 2007, my country's demand for atrazine was over 5,000 tons. Since most pesticides have moderate environmental persistence, long-term and large-scale use of pesticides will cause micro-pollution of environmental water bodies. In recent years, incidents of ATZ detection in surface water and drinking water have been continuously reported. Existin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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