Multi-element carbon nitride-based non-metallic material, and preparation method and application thereof

A non-metallic material, carbon nitride-based technology, used in chemical instruments and methods, chemical/physical processes, special compound water treatment, etc., can solve problems such as insufficient visible light absorption, high carrier recombination rate, and low conductivity. , to achieve the effect of excellent activity, rich source of elements, and efficient degradation

Inactive Publication Date: 2020-04-28
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphitic carbon nitride is limited in practical applications due to its insufficient absorption of visible light, high carrier recombination rate, and low electrical conductivity.

Method used

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  • Multi-element carbon nitride-based non-metallic material, and preparation method and application thereof
  • Multi-element carbon nitride-based non-metallic material, and preparation method and application thereof
  • Multi-element carbon nitride-based non-metallic material, and preparation method and application thereof

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preparation example Construction

[0026] As one aspect of the present invention, a kind of preparation method of multi-component carbon nitride-based non-metallic material is provided, comprising the steps of:

[0027] Step 1: dissolving graphene oxide in aqueous urea solution, adding a reducing agent for reduction reaction, to obtain a precursor containing urea and reduced graphene oxide;

[0028] In an embodiment of the present invention, in step 1, the mass ratio of urea, graphene oxide and reducing agent added is 10000:(0.2-2):(1-10).

[0029] Wherein, it is worth mentioning that when the mass of urea is 10g, the volume of the aqueous solution is 100ml. However, the concentration is not specifically limited, as long as the mass ratio of urea, graphene oxide and reducing agent added meets the above range.

[0030] In an embodiment of the present invention, in step 1, the reducing agent is sodium borohydride. In the embodiment of the present invention, the reducing agent is not specifically limited, and ma...

Embodiment 1

[0044] Precursor preparation:

[0045] Dissolve 10 g of urea in 100 mL of deionized water, and then add 0.5 mg of graphene oxide. The above mixture was continuously stirred in a water bath until the temperature reached 80 °C, then 0.5 mL of 10 mg / mL sodium borohydride solution was added rapidly, and the mixture was kept stirring at a constant temperature of 80 °C for 3 h. The above mixture was dried in an oven at 80°C for 24 hours, taken out and cooled naturally for later use.

[0046] Catalyst CD-rGO-O-g / C 3 N 4 Preparation of:

[0047] Mix 10g of the above precursor, 1g of oxalic acid, and 3mg of carbon quantum dots evenly, place them in a covered crucible, heat them in a muffle furnace at 5°C / min to 550°C, and keep calcination at 550°C for 3h, and complete the sample after natural cooling Prepare, obtain the CD-rGO-O-g / C that embodiment 1 prepares 3 N 4 .

[0048] Characterization:

[0049] The CD-rGO-O-g / C prepared in embodiment 1 was prepared by field emission sca...

Embodiment 2-4

[0055] This example 2-4 uses the preparation method in Example 1 to prepare CD-rGO-O-g / C 3 N 4 , the difference is only in the addition ratio of GO in the precursor.

[0056] Precursor preparation:

[0057] Dissolve 10 g of urea in 100 mL of deionized water, and then add 0.35 mg, 1 mg, and 2 mg of graphene oxide, respectively, to complete the control of the GO ratio. The above three mixtures were continuously stirred in a water bath until the temperature reached 80 °C, and then 0.5 mL of sodium borohydride solution with a concentration of 10 mg / mL was added rapidly respectively, and kept stirring at a constant temperature of 80 °C for 3 h. The above three mixtures were dried in an oven at 80°C for 24 hours, taken out and cooled naturally for later use.

[0058] Mix 10 g of the above three precursors with 1 g of oxalic acid and 3 mg of carbon quantum dots, place them in a covered crucible, heat them in a muffle furnace at 5 °C / min to 550 °C, and keep calcination at 550 °C fo...

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Abstract

The invention relates to a multi-component carbon nitride-based non-metallic material, a preparation method and application thereof, the method comprises the following steps: step 1: dissolving graphene oxide in a urea aqueous solution, adding a reducing agent to carry out a reduction reaction to obtain a precursor containing urea and reduced graphene oxide; and 2, uniformly mixing the precursor,carbon quantum dots and oxalic acid, and carrying out high-temperature calcination to obtain the multi-element carbon nitride-based non-metallic material. The multi-element carbon nitride-based non-metallic material prepared by the invention has the effects of absorbing light in a wide area (the absorption edge exceeds 605nm), promoting the generation of superoxide radicals (. O2 < ->) of active species and accelerating the separation of photon-generated carriers. Through the synergistic effect, the CD-rGO-O-g / C3N4 has very high photocatalytic activity on lincomycin. The method is simple in synthesis process flow and high in operability, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a multi-component carbon nitride-based non-metallic material, a preparation method and an application thereof. Background technique [0002] In recent years, antibiotics, as a new type of pollutant, have attracted much attention because of their potential toxicity to organisms and resistance to bacterial mutations. Lincomycin, as a typical representative of lincosamide antibiotics, has been detected in food, natural water and waste water (content 50ng / L~1μg / L) due to its extensive use. At present, the development of processes and technologies for the efficient removal of typical antibiotics is of great significance to the protection of the ecological environment. [0003] As a metal-free polymer semiconductor, graphitic carbon nitride has attracted much attention due to its facile preparation, tunable electronic structure, high stability and environmental friend...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F101/34C02F101/38
CPCB01J27/24C02F1/30C02F1/725C02F1/722C02F2305/02C02F2305/10C02F2101/34C02F2101/38C02F2101/40B01J35/39
Inventor 刘俊邓雁春王智杰豆小敏刘孔黄艳宾马萌萌曲胜春王占国
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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