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A kind of graphite-like hollow microsphere photocatalyst and its preparation method and application method

A photocatalyst, hollow microsphere technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. Sufficient, morphology limited photon absorption and other issues, to achieve the effect of improving activity and stability, avoiding collapse, and increasing activity

Active Publication Date: 2021-08-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The ZnO compound Cu2+ or Cu / TiO2 photocatalytic oxidation method has the advantage that the photodegradation catalyst Cu / TiO2 has a better photocatalytic degradation efficiency at a lower temperature, but there are also problems that ultraviolet photons cannot be fully used for the reaction, and high concentrations tend to The problem of insufficient degradation of dimethylhydrazine
[0010] Traditional catalysts have the ability to release a large amount of heat when unsupported metal catalysts react with unsymmetrical dimethylhydrazine, which is dangerous, and the shape limits its absorption of photons

Method used

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  • A kind of graphite-like hollow microsphere photocatalyst and its preparation method and application method
  • A kind of graphite-like hollow microsphere photocatalyst and its preparation method and application method
  • A kind of graphite-like hollow microsphere photocatalyst and its preparation method and application method

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Embodiment 1

[0036] The graphite-like hollow microsphere photocatalyst of the present embodiment is prepared through the following steps:

[0037] (1) Dissolve 1 mmol of ferric nitrate in 50 mL of deionized water under stirring to form a homogeneous solution. Subsequently, 2 mmol of dicyandiamide and 25 mmol of glucose were introduced, 10 mmol of ethylene glycol was added and the resulting mixture was sonicated for 30 minutes with continuous stirring for 30 minutes;

[0038] (2) Transfer the homogeneous solution into a 100 mL Teflon-lined stainless steel autoclave and heat at 180 °C for 20 h. After naturally cooling to room temperature, the suspension was centrifuged at 8000r / min for 10min, washed with deionized water and absolute ethanol three times, and dried overnight at 80°C in air;

[0039] (3) The product prepared by the former was introduced into an alumina crucible with a cover, and then heated to 550° C. in a muffle furnace at a heating rate of 2° C. / min, and kept for 3 hours. A...

Embodiment 2

[0042] The graphite-like hollow microsphere photocatalyst of the present embodiment is prepared through the following steps:

[0043] (1) Dissolve 1 mmol of ferric nitrate in 25 mL of deionized water under stirring to form a homogeneous solution. Subsequently, 20 mmol of dicyandiamide and 25 mmol of glucose were introduced, 10 mmol of ethylene glycol was added and the resulting mixture was sonicated for 30 minutes with continuous stirring for 30 minutes;

[0044] (2) Transfer the homogeneous solution into a 100 mL Teflon-lined stainless steel autoclave and heat at 180 °C for 20 h. After naturally cooling to room temperature, the suspension was centrifuged at 8000r / min for 10min, washed with deionized water and absolute ethanol three times, and dried overnight at 80°C in air;

[0045](3) The product prepared by the former was introduced into an alumina crucible with a cover, and then heated to 550° C. in a muffle furnace at a heating rate of 2° C. / min, and kept for 3 hours. A...

Embodiment 3

[0048] The graphite-like hollow microsphere photocatalyst of the present embodiment is prepared through the following steps:

[0049] (1) Dissolve 1 mmol of ferric nitrate in 35 mL of deionized water under stirring to form a homogeneous solution. Subsequently, 4 mmol of dicyandiamide and 25 mmol of glucose were introduced, 10 mmol of ethylene glycol was added and the resulting mixture was sonicated for 30 minutes with continuous stirring for 30 minutes;

[0050] (2) The homogeneous solution was transferred to a 100 mL Teflon-lined stainless steel autoclave and heated at 200 °C for 20 h. After naturally cooling to room temperature, the suspension was centrifuged at 8000r / min for 10min, washed with deionized water and absolute ethanol three times, and dried overnight at 80°C in air;

[0051] (3) The product prepared by the former was introduced into an alumina crucible with a cover, and then heated to 550° C. in a muffle furnace at a heating rate of 2° C. / min, and kept for 4 ho...

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Abstract

The invention discloses a graphite-type hollow microsphere photocatalyst, a preparation method and an application method thereof, and the photocatalyst is α-Fe 2 o 3 @g‑C 3 N 4 , the preparation method of the photocatalyst is to dissolve ferric nitrate, add dicyandiamide, templating agent and auxiliary agent in turn, and form a uniform solution by ultrasonic; the solution is hydrothermally reacted, filtered, washed and dried to obtain the precursor powder; The precursor powder is calcined and ground, and an application method for degrading unsymmetrical dimethylhydrazine wastewater by the photocatalyst is provided. The graphite-like hollow microsphere photocatalyst of the present invention has high catalytic efficiency, can be regenerated, forms a hollow microsphere structure, avoids shape collapse during direct calcination, is safe and environmentally friendly, and has little secondary pollution.

Description

technical field [0001] The invention relates to a photocatalyst and its preparation method and application method, in particular to a graphite-like hollow microsphere photocatalyst and its preparation method and application method, belonging to the fields of environmental engineering and wastewater treatment. Background technique [0002] In recent years, in order to speed up the pace of military modernization, the state has increased investment in the research of rockets, missiles, drones and other cutting-edge weapons and equipment. The scale of equipment testing and production has continued to expand, and the corresponding volume of high-risk residual propellant liquids has also continued to expand. Hydrazine propellants are extremely toxic, highly corrosive, and explosively decomposed at high temperatures. They have potential triple hazards and considerable safety hazards. In the future, there is a great potential for technical demand for the rapid treatment of such prope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/10B01J37/08C02F1/72C02F101/38
CPCB01J27/24B01J35/004B01J37/0036B01J37/08B01J37/10C02F1/722C02F1/725C02F2101/38
Inventor 吴敏李志豪孙岳明王传传刘颖厉明升齐齐
Owner SOUTHEAST UNIV
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