A kind of preparation method and application of zn/g-c3n4 ozone catalyst

A technology of g-c3n4 and catalyst is applied in the field of water pollution control, which can solve the problems of catalyst activity reduction and environmental pollution, and achieve the effects of accelerated degradation and removal, broad application prospects and improved efficiency.

Active Publication Date: 2019-02-19
WUHAN TEXTILE UNIV
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  • Claims
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Problems solved by technology

[0004] For the above-mentioned defects in the prior art, the main purpose of the present invention is to provide a Zn / g-C 3 N 4 The preparation method and application of the ozone catalyst, the present invention uses the composite material of the zero-valent metal Zn and the inorganic carbon nitrogen material in the ozone catalytic process, solves the dissolution of some metal ions after the reaction of the traditional metal catalyst, resulting in the reduction of the catalyst activity and further environmental pollution, etc. question

Method used

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  • A kind of preparation method and application of zn/g-c3n4 ozone catalyst
  • A kind of preparation method and application of zn/g-c3n4 ozone catalyst
  • A kind of preparation method and application of zn/g-c3n4 ozone catalyst

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preparation example Construction

[0034] like figure 1 Shown, the embodiment of the present invention Zn / g-C 3 N 4 The preparation method of ozone catalyst, described method comprises the steps:

[0035] A first solution is provided, the first solution includes a first solvent and g-C uniformly dispersed in the first solvent 3 N 4 ;

[0036] A second solution is provided, the second solution includes a second solvent and nanometer Zn uniformly dispersed in the second solvent 0 powder;

[0037] uniformly drop the second solution into the first solution, and ultrasonically stir to obtain a mixture;

[0038] The mixture was stirred and evaporated to dryness, dried, ground, and calcined at high temperature to obtain Zn / g-C 3 N 4 Ozone catalyst.

[0039] Graphite carbon nitride (g-C 3 N 4) is an allotrope of carbon nitride, which has a unique graphite-like layered stacking structure and sp2 hybridized π-conjugated electronic band structure. Because it has a certain absorption for visible light, it also h...

Embodiment 1

[0046] g-C 3 N 4 preparation of

[0047] 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. After the crucible is cooled, take it out to obtain light yellow powder g-C 3 N 4 , grind and set aside.

[0048] Zn / g-C 3 N 4 preparation of

[0049] Weigh 6g g-C 3 N 4 The powder is evenly dispersed in 30mL ethanol; weigh 0.325g of nano-Zn 0 powder, evenly dispersed in 20mL ethanol water; the nano-Zn 0 Add the powder solution to g-C evenly drop by drop 3 N 4 solution, with vigorous stirring, after the dropwise addition, 30 ° C ultrasonic stirring for 30 min; then the mixture was placed in an 80 ° C water bath and stirred until dry, dried in a 70 ° C oven, after uniform grinding, placed in Crucible, then placed in a muffle furnace, heated to a different temperature of 350°C at a heating rate of 3°C / min, and calcined at a constant temperature at a target temperature of 350...

Embodiment 2

[0054] g-C 3 N 4 preparation of

[0055] Weigh a certain amount of melamine into a crucible, put the crucible into a muffle furnace, and bake it at 500°C for 3 hours at a heating rate of 5°C / min. After the crucible is cooled, take it out to obtain light yellow powder g-C 3 N 4 , grind and set aside.

[0056] Zn / g-C 3 N 4 preparation of

[0057] Weigh 6g g-C 3 N 4 The powder is evenly dispersed in 30mL of methanol; weigh 0.425g of nano-Zn 0 powder, evenly dispersed in 20mL methanol water; the nano-Zn 0 Add the powder solution to g-C evenly drop by drop 3 N 4 solution, with vigorous stirring, after the dropwise addition, 20 ° C ultrasonic stirring for 60 min; then the mixture was placed in a 70 ° C water bath and stirred until dry, placed in a 60 ° C oven for drying, after uniform grinding, placed in Crucible, then placed in a muffle furnace, heated to a different temperature of 300°C at a heating rate of 3°C / min, and calcined at a constant temperature at a target te...

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Abstract

The invention provides a preparation method and application of Zn / g-C3N4 ozone catalyst. The method comprises the following steps that 1, a first solution is provided, wherein the first solution comprises a first solvent and g-C3N4 dispersed in the first solvent; a second solution is provided, wherein the second solution comprises a second solvent and nano ZnO powder dispersed in the second solvent; the second solution is uniformly and dropwise added into the first solution, ultrasonic stirring is conducted, and a mixture is obtained; the mixture is stirred and dried by distillation, dried, ground and calcined at high temperature, and the Zn / g-C3N4 ozone catalyst is obtained. The Zn / g-C3N4 ozone catalyst can be used for catalyzing ozone organic pollutants; a composite material of zero valence metal Zn and an inorganic carbon and nitrogen material is used for the ozone catalysis process, the phenomenon that after a traditional metal catalyst reacts, part of metal ions are dissolved out is reduced, and the activity and stability of the catalyst are improved.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, in particular to a Zn / g-C 3 N 4 Preparation method and application of ozone catalyst. Background technique [0002] As a strong oxidant, ozone has a standard oxidation potential of 2.07eV, which can oxidize and remove organic matter, improve the biodegradability of refractory organic matter and natural macromolecular organic matter, and improve the effect of flocculation and precipitation. In the process of water treatment, it is usually used for sterilization, disinfection, deodorization, deodorization and decolorization. There are two ways to oxidize organic matter by ozone. One is to directly oxidize organic matter by ozone. Ozone can react rapidly with some functional groups, such as active benzene rings, neutral alkylamines, double bonds, and mercaptans; the other is to rely on ozone and water After contact, hydroxyl radicals (·OH) are generated for indirect oxidation. ·OH...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/08C02F1/72C02F1/78C02F101/30
CPCB01J27/24B01J37/08C02F1/725C02F1/78C02F2101/30
Inventor 袁向娟夏东升孙磊李东亚徐海明曹刚秦文磊
Owner WUHAN TEXTILE UNIV
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