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Nano-composite carbon nitride catalytic material and preparation method and application thereof

A technology for compounding carbon nitride and catalytic materials, which is applied in the field of preparation and application of catalytic materials, can solve problems such as narrow visible light response range, and achieve the effects of high catalytic activity, simplified production process, and reduced production cost.

Active Publication Date: 2022-01-18
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the absorption edge of carbon nitride is about 460nm, showing a narrow visible light response range, so how to improve the g-C 3 N 4 The ability to capture light and improve the utilization of visible light and red light has become a research hotspot

Method used

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  • Nano-composite carbon nitride catalytic material and preparation method and application thereof
  • Nano-composite carbon nitride catalytic material and preparation method and application thereof
  • Nano-composite carbon nitride catalytic material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Grind 30g of melamine evenly and put it into a crucible with a cover, and place the crucible in a muffle furnace for roasting. The muffle furnace heats up to 700°C at a rate of 2°C / min, keeps it warm for 4h, and cools naturally to obtain carbon nitride . carbon nitride, C 60 , Deionized water is placed in a ball mill according to the mass ratio of 5:0.1:8, ball milled at a speed of 300 rpm, kept for 8 hours, and the nanocomposite carbon nitride material is obtained after drying, which is recorded as CN-700-C 60 .

[0034] C prepared for testing this example 60 / g -C 3 N 4 For the photocatalytic performance of the material, the material prepared in this example was used in the red photocatalytic degradation of Rhodamine B (RhB) to test its photocatalytic activity. Measure the Rhodamine B aqueous solution of 50mL 10μg / mL and put it into a test tube, add 0.03g of C prepared in this embodiment 60 / g -C 3 N 4, with a wavelength of 660nm, a power of 50W LED lamp as a ...

Embodiment 2

[0036] Grind 30g of melamine evenly and put it into a crucible with a cover, and place the crucible in a muffle furnace for roasting. The muffle furnace heats up to 700°C at a rate of 2°C / min, keeps it warm for 4h, and cools naturally to obtain carbon nitride . carbon nitride, C 60 1. Deionized water was placed in a ball mill at a mass ratio of 5:0.05:8, ball milled at a rate of 300 rpm, kept for 8 hours, and dried to obtain a nanocomposite carbon nitride material.

[0037] The C prepared in this embodiment 60 / g -C 3 N 4 The material is used in the reaction of red light (660nm) to catalyze the degradation of rhodamine B, the reaction conditions are the same as in Example 1, the light is 90min, and the degradation rate is 1.399h -1 .

Embodiment 3

[0039] Grind 30g of melamine evenly and put it into a crucible with a cover, and place the crucible in a muffle furnace for roasting. The muffle furnace heats up to 550°C at a rate of 2°C / min, keeps it warm for 3 hours, and cools naturally to obtain carbon nitride . carbon nitride, C 60 1. Deionized water was placed in a ball mill at a mass ratio of 5:0.15:8, ball milled at a rate of 400 rpm, kept for 7 hours, and dried to obtain a nanocomposite carbon nitride material.

[0040] The C prepared in this embodiment 60 / g -C 3 N 4 The material is used in the reaction of red light (660nm) to catalyze the degradation of rhodamine B, the reaction conditions are the same as in Example 1, the light is 90min, and the degradation rate is 1.097h -1 .

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Abstract

The invention discloses a nano-composite carbon nitride catalytic material and a preparation method and application thereof, a carbon nitride catalyst with red light response is simply and conveniently prepared by taking a small molecular nitrogen-containing compound as a raw material and C60 as an auxiliary agent and adopting a high-temperature calcination-ball milling method. The preparation method comprises the following steps: firstly, weighing a metered micromolecular nitrogen-containing compound, putting into a crucible with a cover, putting the crucible into a muffle furnace for roasting, naturally cooling, uniformly mixing the obtained carbon nitride with a proper amount of C60, dropwise adding a small amount of water or alcohol, putting into a ball mill for ball milling, and drying to obtain the required nano-composite carbon nitride catalytic material. The composite carbon nitride catalytic material has obvious up-conversion capability, can effectively photocatalytically degrade rhodamine B under the irradiation of visible light and red light (wavelength of 420-660 nm), has higher catalytic activity and better repeatability, and has potential utilization value in the aspect of sewage treatment. The preparation method is simple and convenient, easy to operate, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of preparation and application of catalytic materials, in particular to a nanocomposite carbon nitride catalytic material and its preparation method and application. Background technique [0002] Photocatalytic reactions have great potential in environmental purification and energy conversion, and in the solar spectrum, visible light and infrared light account for more than 95% of the solar irradiated energy. Therefore, how to efficiently utilize visible light and infrared light has become a research hotspot. In addition, designing an efficient photocatalyst for sewage degradation is a challenging task in the field of photocatalysis. The photocatalytic system needs to meet the high-efficiency supply and the ability to catalyze the conversion of photogenerated charges at the same time to realize the effective conversion of pollutants. [0003] Graphite carbon nitride (g-C 3 N 4 ) has good chemical stabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/08B01J37/00B82Y30/00B82Y40/00C02F1/30C09K11/65C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J37/08B01J37/0036C02F1/30C09K11/65C09K11/0883C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10B01J35/23
Inventor 王鹏卫帅何昌春李靖蔡可迎周颖梅葛奉娟徐艳堵锡华
Owner XUZHOU UNIV OF TECH