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Carbon-nitrogen catalyst for photosynthesizing hydrogen peroxide and preparation method thereof

A technology for photosynthesis of hydrogen peroxide and carbon nitrogen catalysts, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve the problems of environmental pollution, high toxicity, and high energy consumption in the production process. Achieve the effect of broadening the photoresponse range and mild reaction conditions

Active Publication Date: 2017-10-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the production system is complex, the production process consumes a lot of energy, and the H 2 o 2 Existing with organic substances in the reaction system at the same time, it is easy to cause explosion hazard and high toxicity
Yasuhiro Shiraishi's team reported the modification of g-C with PDI (pyromellitic diimide) 3 N 4 Get valence band position corrected g-C 3 N 4 , but pyromellitic acid diimide is an organic macromolecule, which pollutes the environment (Angew.Chem.Int.Ed., 2014, 53, 13454-13459)

Method used

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  • Carbon-nitrogen catalyst for photosynthesizing hydrogen peroxide and preparation method thereof
  • Carbon-nitrogen catalyst for photosynthesizing hydrogen peroxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A. Weigh 3 g of melamine and grind it in a mortar for 10 minutes, then put it into a muffle furnace and roast it in a nitrogen atmosphere, raise the temperature to 520°C at a heating rate of 5°C / min, keep it warm for 2 hours, and then cool it down at a rate of 5°C / min Rate is cooled to room temperature, obtains pale yellow solid powder, and it is placed in the mortar and grinds 30min, obtains C 3 N 4 .

[0029] B. The C obtained in step A 3 N 4 Put it in a glucose solution with a concentration of 0.03mol / L, ultrasonic for 4 hours; put it in a hydrothermal reactor, react at 120°C for 12 hours, cool down to room temperature, take it out and centrifuge at 5000 rpm for 5 minutes, and then deionize it with 100mL Water washing, centrifugation and deionized water washing steps were repeated 3 times, and then dried in an oven at 70°C for 12 hours.

[0030] C. Roast the obtained sample in a nitrogen atmosphere, raise the temperature to 500°C at a heating rate of 5°C / min, kee...

Embodiment 2

[0032] A. Weigh 10g of melamine and grind it in a mortar for 20min, then put it into a muffle furnace and roast it in a nitrogen atmosphere, raise the temperature to 500°C at a heating rate of 4.5°C / min, keep it warm for 2.5 hours, and then cool it down at a rate of 8°C / min Rate is cooled to room temperature, obtains pale yellow solid powder, and it is placed in the mortar and grinds 60min, obtains C 3 N 4 .

[0033] B. The C obtained in step A 3 N 4 Put it in a glucose solution with a concentration of 0.01mol / L, ultrasonicate for 4.5 hours; put it in a hydrothermal reaction kettle, react at 125°C for 11 hours, cool down to room temperature, take it out and centrifuge it at 6000 rpm for 8 minutes, and then use 120mL deionized The water washing, centrifugation and deionized water washing steps were repeated 3 times, and then dried in an oven at 70°C for 10 hours.

[0034] C. Roast the obtained sample in a nitrogen atmosphere, raise the temperature to 500°C at a heating rate...

Embodiment 3

[0037] A. Weigh 15g of melamine and grind it in a mortar for 15min, then put it into a muffle furnace and bake it in a nitrogen atmosphere, raise the temperature to 550°C at a heating rate of 5°C / min, keep it warm for 2.5 hours, and then cool it down at a rate of 10°C / min Rate is cooled to room temperature, obtains light yellow solid powder, it is placed on the mortar and grinds 50min, obtains C 3 N 4 .

[0038] B. The C obtained in step A 3 N 4 Put it in a glucose solution with a concentration of 0.006mol / L, ultrasonicate for 5 hours; put it in a hydrothermal reactor, react at 120°C for 10 hours, cool down to room temperature, take it out and centrifuge it at 5500 rpm for 7 minutes, and then use 110mL deionized The water washing, centrifugation and deionized water washing steps were repeated 3 times, and then dried in an oven at 70°C for 9 hours.

[0039] C. Roast the obtained sample in a nitrogen atmosphere, raise the temperature to 520°C at a rate of 5°C / min, keep it wa...

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Abstract

The invention discloses a carbon-nitrogen catalyst for photosynthesizing hydrogen peroxide and a preparation method thereof. The preparation method comprises the following steps of: roasting organic matter powder containing carbon and nitrogen in air or inert atmosphere to obtain C3N4 solid powder; then grinding the C3N4 to mix with sugar liquid, and carrying out carbonation reaction in a hydrothermal reactor to obtain C3N4 modified by amorphous carbon; and then roasting in the inert atmosphere to obtain the carbon-nitrogen catalyst (CxNy). The adopted materials are rich in source, is non-toxic, has the characteristics of being environmentally friendly and sustainable and being low in cost, and is suitable for large-scale production. The carbon-nitrogen catalyst is used for producing H2O2 by using water, oxygen and a little amount of alcohol and utilizing sunlight as an energy donor, the whole process does not use any toxic reagent and toxic solvent, has no emission of wastes and waste water, is mild in reaction condition and is environmentally friendly and free of pollution.

Description

technical field [0001] The invention belongs to the field of preparation of catalysts for cleaning and synthesizing hydrogen peroxide driven by sunlight, and in particular relates to the preparation of carbon and nitrogen catalysts. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) known as "clean" chemicals, which are used in papermaking, textiles, printing and dyeing, electronics, food, environmental protection, and chemical synthesis. With the economic and social development and the continuous improvement of people's living standards, their applications will be more extensive. [0003] H is currently produced industrially 2 o 2 The main method is the anthraquinone method, which has the advantages of easy large-scale equipment and high yield. The disadvantage is that the production system is complex, the production process consumes a lot of energy, and the H 2 o 2 Existing with organic substances in the reaction system at the same time, it is easy to cause e...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/10C01B15/029
CPCB01J27/24B01J37/10C01B15/029
Inventor 项顼张欣
Owner BEIJING UNIV OF CHEM TECH
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