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Preparation and application of palygorskite/graphite phase carbon nitride compound composite material

A composite material, palygorskite technology, applied in the direction of silicon compound, special compound water treatment, chemical/physical process, etc., can solve the problem that the degradation performance of organic pollutants is not ideal, cannot provide reactive sites, and is difficult to uniformly Covering and other issues

Inactive Publication Date: 2019-09-20
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, g-C directly synthesized by the method reported by Wang et al. 3 N 4 Is a bulk material formed by large sheets, the specific surface area is usually less than 10 m 2 g -1 , it is difficult to evenly coat the surface of the photocatalyst and cannot provide enough reactive sites, so the degradation performance of organic pollutants is not ideal

Method used

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  • Preparation and application of palygorskite/graphite phase carbon nitride compound composite material
  • Preparation and application of palygorskite/graphite phase carbon nitride compound composite material
  • Preparation and application of palygorskite/graphite phase carbon nitride compound composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of exfoliated palygorskite: Grind 10 g of raw ore palygorskite into powder, add 1 L of deionized aqueous solution to a large beaker and mechanically stir for 1 hour, stop stirring, let stand for 24 hours, remove the supernatant liquid, and extract The upper layer was precipitated, dried overnight at 100°C, added to 4 mol / L hydrochloric acid and stirred for 24 hours, washed five times with water, dried and ground for later use;

[0038] (2) pal / g-C 3 N 4 Preparation of (6%): Take 0.12 g of palygorskite prepared in step (1), add it to 100 ml of distilled water, ultrasonicate for 01 hour, then add 4 g of dicyandiamide, stir evenly, ultrasonicate for 1 hour, heat to 50°C and continue stirring Evaporate completely to dryness, grind into powder, calcined at 550°C for 4 hours, and grind into powder after cooling down to room temperature, which is pal / g-C 3 N 4 (6%) samples;

[0039] (3) Degradation performance of tetracycline hydrochloride: Degradation expe...

Embodiment 2

[0041] (1) Preparation of exfoliated palygorskite: same as in Example 1;

[0042] (2) pal / g-C 3 N 4 (8%) preparation: Take 0.16 g of palygorskite prepared in step (1) and add it to 100 ml of distilled water, ultrasonic for 1 hour, then add 4 g of dicyandiamide and stir evenly, then ultrasonic for 1 hour, heat to 50°C and continue stirring until Completely evaporated to dryness, ground into powder, calcined at 550°C for 4 hours, and ground into powder after cooling down to room temperature, which is the pal / g-C3N4 (8%) sample;

[0043] (3) Degradation performance of tetracycline hydrochloride: Degradation experiment was done under 800 watt xenon lamp, pal / g-C 3 N 4 (8%) The total removal rate of tetracycline hydrochloride reached 78%.

Embodiment 3

[0045] (1) Preparation of exfoliated palygorskite: same as in Example 1;

[0046] (2) pal / g-C 3 N 4 Preparation of (10%): Take 0.2 g of palygorskite prepared in step (1) and add it to 100 ml of distilled water, sonicate for 1 hour, then add 4 g of dicyandiamide, stir evenly, sonicate for 1 hour, heat to 45~50°C and continue Stir until completely evaporated to dryness, ground into powder, calcined at 550°C for 4 hours, and ground into powder after cooling down to room temperature, which is the pal / g-C3N4 (10%) sample;

[0047] (3) Degradation performance of tetracycline hydrochloride: Degradation experiment was done under 800 watt xenon lamp, pal / g-C 3 N 4 (10%) The total removal rate of tetracycline hydrochloride reached 57%.

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Abstract

The invention discloses preparation and application of a palygorskite / graphite phase carbon nitride compound composite material. The preparation method of the pal / g-C3N4 composite material includes: subjecting palygorskite to ultrasonic dispersion in distilled water, adding dicyandiamide and mixing the substances evenly, and then performing ultrasonic treatment for 0.5-1h; conducting heating to 45-50DEG C, and further performing stirring till complete dryness by evaporation, conducting grinding into powder, placing the product in a muffle furnace, and conducting calcination at 520-550DEG C for 3.5-4h; performing cooling to room temperature, and then conducting grinding into powder, thus obtaining the pal / g-C3N4 composite material. The invention adopts water bath method to compound dicyandiamide and palygorskite to successfully prepare the pal / g-C3N4 composite material, the catalytic activity of g-C3N4 is combined with the adsorption performance of palygorskite, and the two substances cooperate to enhance the light absorption intensity of the composite sample, thus improving the photocatalytic efficiency, and reaching the effect of efficient removal of pollutants. Experiments show that the composite catalytic material has high catalytic oxidation rate on tetracycline hydrochloride, and the total removal rate reaches 85%.

Description

technical field [0001] The present invention relates to a palygorskite composite material, in particular to a palygorskite / graphite phase carbonitride (pal / g-C 3 N 4 ) The preparation method of the composite material is mainly used in the reaction of photocatalytic degradation of tetracycline hydrochloride. Background technique [0002] With the rapid development of global science, technology and economy, while material needs are gradually being basically met, people pay more attention to ecological and environmental issues. my country's proposal of sustainable development is a good response to the harmonious coexistence of man and nature, and the common As for the problem of development, we can no longer follow the old path of first development and then governance, and economic development cannot be at the cost of environmental pollution. Among the many environmental pollutions, water pollution is one of the most closely related to people. Human life and production activit...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30B01J20/10B01J20/30C02F101/38
CPCB01J27/24C02F1/30B01J20/10C02F2101/38C02F2305/10B01J35/39
Inventor 王其召张瑞闫昌新黄静伟
Owner NORTHWEST NORMAL UNIVERSITY
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