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Carbine-nitrene/silver carbonate composite nano-material, and preparation method and application thereof

A technology of composite nanomaterials and silver carbonate, applied in the field of nanomaterials, can solve problems such as unsatisfactory photocatalytic stability, and achieve the effects of simple and easy-to-control production process, improved efficiency, and improved degradation speed

Active Publication Date: 2018-05-01
ZHENJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ag 2 CO 3 Semiconductor photocatalysts have high visible light photocatalytic activity for various dyes such as RhB, MO and MB, but their photocatalytic stability is not ideal enough.

Method used

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  • Carbine-nitrene/silver carbonate composite nano-material, and preparation method and application thereof
  • Carbine-nitrene/silver carbonate composite nano-material, and preparation method and application thereof
  • Carbine-nitrene/silver carbonate composite nano-material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step (1): Weigh 10 g of a mixture of urea and melamine (molar ratio 1:1) into a crucible, and then bake in a muffle furnace at 580° C. for 1 h with a heating rate of 5 / min. The synthesized yellow powder was washed several times with deionized water and absolute ethanol, and finally dried under vacuum at 60°C for 12 hours to obtain g-C 3 N 4 Lamellar structure;

[0025] Step (2), under room temperature conditions, the g-C prepared by 2mg (1) 3 N 4 Dissolve in 20mL deionized water and ultrasonically disperse for at least 1h, then add 2mmol AgNO 3 Disperse in 20mL deionized water, and gradually add it dropwise to the above g-C after fully dissolving 3 N 4 The solution was stirred well, and finally 20mL Na 2 CO 3 10H 2 O (0.05M) solution was added dropwise to the above solution and fully stirred for 1 hour, then washed and centrifuged with deionized water and ethanol several times, and dried at 60°C to obtain a 2%-carbanitroene / silver carbonate sample, which was def...

Embodiment 2

[0027] Step (1): Add 10 g of urea and melamine mixture (molar ratio 1:0.5) weighed into the crucible, and then bake in a muffle furnace at 400° C. for 4 h with a heating rate of 5 / min. The synthesized yellow powder was washed several times with deionized water and absolute ethanol, and finally dried under vacuum at 60°C for 12 hours to obtain g-C 3 N 4 Lamellar structure;

[0028] Step (2), under room temperature conditions, the g-C prepared by 4mg (1) 3 N 4 Dissolve in 20mL deionized water and ultrasonically disperse for at least 1h, then add 2mmol AgNO 3 Disperse in 20mL deionized water, and gradually add it dropwise to the above g-C after fully dissolving 3 N 4 The solution was stirred well, and finally 20mL NaHCO 3 (0.05M) solution was added dropwise to the above solution and fully stirred for 1 hour, then washed and centrifuged with deionized water and ethanol several times, and dried at 60°C to obtain a 4%-carbanitroene / silver carbonate sample, which was defined as...

Embodiment 3

[0030] Step (1): Add 10 g of the urea-melamine mixture (molar ratio 1:6) weighed into the crucible, and then bake it in a muffle furnace at 650° C. for 0.5 h with a heating rate of 5 / min. The synthesized yellow powder was washed several times with deionized water and absolute ethanol, and finally dried under vacuum at 60°C for 12 hours to obtain g-C 3 N 4 Lamellar structure;

[0031] Step (2), under room temperature conditions, the g-C prepared by 6mg (1) 3 N 4 Dissolve in 20mL deionized water and ultrasonically disperse for at least 1h, then add 2mmol AgNO 3 Disperse in 20mL deionized water, and gradually add it dropwise to the above g-C after fully dissolving 3 N 4 The solution was stirred well, and finally 20mL K 2 CO 3 (0.05M) solution was added dropwise to the above solution and fully stirred for 1 hour, then washed and centrifuged with deionized water and ethanol several times, and dried at 60°C to obtain a 6%-carbanitroene / silver carbonate sample, which was defin...

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Abstract

The invention discloses a carbine-nitrene / silver carbonate composite nano-material, and a preparation method and application thereof. The composite nano-material comprises 1 to 10 wt% of g-C3N4, withthe balance being Ag2CO3, wherein Ag2CO3 microrods adhere to the surface of lamellar g-C3N4. The preparation method comprises the following steps: subjecting urea and melamine to solid phase sinteringin a tubular furnace so as to prepare a g-C3N4 nanosheet; dispersing the g-C3N4 nanosheet in deionized water under the action of stirring and supersonic waves; and then adding a soluble silver salt and a precipitating agent, allowing a solution to undergo a precipitation reaction at room temperature, and carrying out cleaning and drying so as to obtain a reaction product, i.e., the carbine-nitrene / silver carbonate composite nano-material which is applicable to treatment of organic waste water and organic pollutants in the air. Addition of the g-C3N4 effectively improves the photocatalytic degradation of organic matters.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a carbazene / silver carbonate composite nanomaterial, its preparation method and its use as a photocatalyst. Background technique [0002] Ag 2 CO 3 Semiconductor photocatalysts have high visible light photocatalytic activity for various dyes such as RhB, MO and MB, but their photocatalytic stability is not ideal. Therefore, there is a need to improve its stability without affecting its photocatalytic activity. Recently, graphitic carbon nitride (g-C 3 N 4 ) semiconductor photocatalysts have attracted widespread attention due to their stability, non-toxicity and bandgap energy of only 2.7eV. g-C 3 N 4 It is a non-metal semiconductor photocatalyst, which can be applied to decompose water and organic pollutants. Recently a large number of g-C 3 N 4 Composites of semiconductor photocatalysts and silver-based materials have been reported, such as g-C 3 N 4 / Ag 3 VO 4 , g-C ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/44C02F1/30C02F101/30
CPCB01D53/8687C02F1/30B01J27/24C02F2305/10C02F2101/30B01D2258/06B01J27/232B01J35/19B01J35/39
Inventor 唐国钢唐华
Owner ZHENJIANG COLLEGE
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