Dual-modified carbon nitride as well as preparation method and application thereof

A technology of carbon nitride and hydroxylated carbon nitride, which is applied in the field of photocatalytic materials, can solve the problems of poor catalytic effect and poor photocatalytic degradation ability of carbon nitride, so as to promote the separation of local space charges, promote contact, and improve The effect of degradation rate

Pending Publication Date: 2022-06-03
NORTHEAST GASOLINEEUM UNIV
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the existing modified carbon nitride has poor photocatalytic degradation ability and poor catalytic effect. Aiming at the defects in the prior art, the present invention provides a double-modified carbon nitride and its preparation Method and application to achieve the purpose of improving the photocatalytic degradation performance of carbon nitride

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  • Dual-modified carbon nitride as well as preparation method and application thereof
  • Dual-modified carbon nitride as well as preparation method and application thereof
  • Dual-modified carbon nitride as well as preparation method and application thereof

Examples

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preparation example Construction

[0049] (1) Preparation of carbon nitride and photocatalytic degradation of carbon nitride for dye wastewater MB, degradation rate of MB.

[0050] Weigh 10g of solid melamine with an electronic balance, put it in a crucible, put it in a muffle furnace, set the program to 2.3°C / min from 20°C to 550°C, and hold at 550°C for 3 hours until the reaction is complete.

[0051] will C 3 N 4 In the process of photocatalytic degradation of dye wastewater MB, for 10 mg / L MB aqueous solution, the degradation rates of MB were 36.9%, 51.8%, 62.2%, and 70.6% for 15 min, 30 min, 60 min, and 120 min of light reaction, respectively.

[0052] (2) Preparation of hydroxylated carbon nitride and test of MB degradation rate.

[0053] Weigh 0.5g of C 3 N 4 Add 50 mL of 20% hydrogen peroxide solution and place it in a heating stirrer and stir with a constant temperature water bath at 25°C for different times. Suction filtration, put in an oven for 24h, scrape off, grind, weigh and bottle.

[0054...

Embodiment 1

[0057] In this example, the KH-792 modified hydroxylated carbon nitride was prepared by the following steps

[0058] Accurately weigh 0.1 g of hydroxylated C 3 N 4 In a three-necked flask, add 50 mL of toluene solvent, ultrasonically disperse for 10 min at room temperature, add 0.1 mL of KH-792, and react at 80 °C for 8 h under stirring and refluxing. After the reaction was completed and the temperature dropped to room temperature, it was filtered, washed twice with toluene and anhydrous ethanol, and dried under vacuum at 100 °C for 12 h to obtain KH-792 modified hydroxylated C 3 N 4 Pale yellow powder.

Embodiment 2

[0060] In this example, YDH-171 modified hydroxylated carbon nitride was prepared by the following steps

[0061] Accurately weigh 0.1 g of hydroxylated C 3 N 4 In a three-necked flask, add 50 mL of toluene solvent, ultrasonically disperse for 10 min at room temperature, add 0.1 mL of YDH-171, and react at 80 °C for 8 h under stirring and refluxing. After the reaction was completed and the temperature dropped to room temperature, it was filtered, washed twice with toluene and anhydrous ethanol, and dried under vacuum at 100 °C for 12 h to obtain YDH-171-modified hydroxylated C 3 N 4 Pale yellow powder.

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Abstract

The invention provides dual-modified carbon nitride as well as a preparation method and application thereof. The preparation method of the dual-modified carbon nitride comprises the following steps: (1) mixing carbon nitride in a hydrogen peroxide solution, and stirring to obtain hydroxylated carbon nitride; and (2) mixing the hydroxylated carbon nitride obtained in the step (1) with a coupling agent in a solvent, reacting, and drying to obtain the double-modified carbon nitride. According to the dual-modified carbon nitride prepared by the preparation method disclosed by the invention, the degradation rate of the dual-modified carbon nitride on dye wastewater MB can be remarkably improved, and the dual-modified carbon nitride has a relatively high application value in the dye wastewater.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a double-modified carbon nitride and a preparation method and application thereof. Background technique [0002] With the vigorous development of social economy, energy crisis and environmental pollution have become the issues that researchers all over the world attach great importance to. Photocatalytic technology shows great potential in environmental remediation and new energy development. However, the current photocatalysts have low activity due to various reasons, such as the cumbersome catalyst preparation process, high cost, low utilization of sunlight, and weak photocatalyst performance. There are many restrictions. Therefore, it is very necessary to develop a photocatalyst with simple preparation method, low catalyst cost, high utilization rate of sunlight and strong catalytic performance. [0003] Carbon nitride (C 3 N 4 The emergence of ) provides...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02B01J27/24C02F1/30C02F101/30C02F101/36C02F101/38
CPCB01J31/0275B01J27/24B01J35/004C02F1/30C02F2101/308C02F2101/36C02F2101/38C02F2101/40C02F2305/10C02F2305/023Y02E60/36
Inventor 柳艳修李金琦宋华王园园王雪芹张娇静张梅
Owner NORTHEAST GASOLINEEUM UNIV
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