Preparation and application of phosphorus-doped graphite carbon nitride/ferroferric oxide composite material

A technology of graphitic carbon nitride and iron tetroxide, which is applied in chemical/physical processes, oxidized water/sewage treatment, special compound water treatment, etc. low rate issues

Active Publication Date: 2021-06-11
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After tetracycline antibiotics enter the human body, they will endanger human hematopoietic function, interfere with hormone balance, and even cause cancer. Excessive and long-term use of antibiotics will bring great harm to human health.
However, g-C 3 N 4 The band gap is wide, the light absorption rate is low, and the recombination rate of photogenerated electrons and hole pairs is high.

Method used

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  • Preparation and application of phosphorus-doped graphite carbon nitride/ferroferric oxide composite material
  • Preparation and application of phosphorus-doped graphite carbon nitride/ferroferric oxide composite material
  • Preparation and application of phosphorus-doped graphite carbon nitride/ferroferric oxide composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of CNP: Grind urea (10g, 0.17mol) and dipotassium hydrogen phosphate (0.87g, 5mmol) thoroughly and mix them in a crucible with a lid, heat in a muffle furnace at a heating rate of 2.3°C / min Calcined at 500°C for 2~5h, cooled to room temperature, dissolved in distilled water to form a 1g / L solution, ultrasonicated intermittently at 20000~25000 Hz (interval 1~2h, total ultrasonic 3 h), centrifuged, Washing and drying afforded a pale yellow solid labeled CNP.

[0029] (2) CNP / Fe 3 o 4 Preparation of composite materials: 1 g of CNP and 0.027 g of FeCl 3 •6H 2 O was dissolved in 64 ml of ethylene glycol solution to form a light yellow solution, then 3 ml of hydrazine hydrate was added and stirred for 30 min to form a brownish yellow suspension, and the suspension was transferred to a 100 ml polytetrafluoroethylene-lined stainless steel reactor, React at 200 °C for 10 h, centrifuge, wash with deionized water and ethanol, and dry in a vacuum oven at 70 °C f...

Embodiment 2

[0032] (1) Preparation of CNP: Grind urea (10 g, 0.17 mol) and dipotassium hydrogen phosphate (0.87 g, 5 mmol) thoroughly and mix them in a crucible with a lid, and heat up at a rate of 2.3 °C / min in a muffle furnace Heating to 500°C, calcining for 2~5h, cooling to room temperature, adding it into distilled water and dissolving it to form a 1 g / L solution, ultrasonication at 20000~25000 Hz (interval time 1~2h, total ultrasonication 3 h), Centrifugation, washing, and drying afforded a pale yellow solid labeled CNP.

[0033] (2) CNP / Fe 3 o 4 Preparation of composite materials: 1 g of CNP and 0.054 g of FeCl 3 •6H 2 O was dissolved in 64 ml ethylene glycol solution to form a light yellow solution, then added 6 ml hydrazine hydrate and stirred for 30 min to form a brownish yellow suspension, and the suspension was transferred to a 100 ml polytetrafluoroethylene-lined stainless steel reactor, React at 200 °C for 10 h, centrifuge, wash with deionized water and ethanol, and dry i...

Embodiment 3

[0036] (1) Preparation of CNP: Grind urea (10 g, 0.17 mol) and dipotassium hydrogen phosphate (0.87 g, 5 mmol) thoroughly and mix them in a crucible with a lid, and heat up at a rate of 2.3 °C / min in a muffle furnace Heating to 500°C, calcining for 2~5h, cooling to room temperature, dissolving it in distilled water to form a 1 g / L solution, ultrasonication at 20000~25000 Hz (interval 1~2h, total ultrasonication 3 h), Centrifugation, washing, and drying afforded a pale yellow solid labeled CNP.

[0037] (2) CNP / Fe 3 o 4 Preparation of composite materials: 1 g of CNP and 0.108 g of FeCl 3 •6H 2 O was dissolved in 64 ml of ethylene glycol solution to form a light yellow solution, then 12 ml of hydrazine hydrate was added and stirred for 30 min to form a brownish yellow suspension, and the suspension was transferred to a 100 ml polytetrafluoroethylene-lined stainless steel reaction kettle, in React at 200 °C for 10 h, centrifuge, wash with deionized water and ethanol, and dry ...

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Abstract

The invention provides a preparation method of a phosphorus-doped graphite carbon nitride / ferroferric oxide composite material, which comprises the following steps: grinding and fully mixing urea and dipotassium phosphate, heating the materials to 500-600 DEG C in a muffle furnace at a heating rate of 2.3 DEG C / min, calcining the materials for 2-5 hours, cooling the product to room temperature, adding the product into distilled water for dissolving, and carrying out ultrasonic treatment, centrifuging, washing and drying to obtain light yellow solid CNP; then dissolving CNP and FeCl36H2O in an ethylene glycol solution to obtain a light yellow solution, then adding hydrazine hydrate, uniformly stirring and mixing the components, carrying out hydrothermal reaction at 180-200 DEG C for 10-12 hours, centrifuging the reaction product, washing with deionized water and ethanol, and carrying out vacuum drying to obtain the phosphorus-doped g-C3N4 / Fe3O4 composite material marked as CNP / Fe3O4. Phosphorus doping in the composite material effectively improves the light response capability, widens the light absorption range, and promotes the separation of photo-induced electrons and hole pairs. Compared with a material not doped with phosphorus, the degradation of tetracycline hydrochloride by the composite material is obviously enhanced.

Description

technical field [0001] The invention relates to a method for preparing a phosphorus-doped graphite carbon nitride / iron tetroxide composite material. The phosphorus-doped graphite carbon nitride / iron tetroxide composite material is mainly used as a photocatalyst for photocatalytic degradation of tetracycline hydrochloride . Background technique [0002] With the rapid development and progress of human society, energy shortage and environmental pollution are becoming more and more serious. Antibiotic wastewater is a kind of refractory wastewater in industry, with high concentration and complex composition. After tetracycline antibiotics enter the human body, they will endanger the hematopoietic function of the human body, interfere with hormone balance, and even cause cancer. Excessive and long-term use of antibiotics will bring great harm to human health. Therefore, finding an efficient, economical and stable catalyst becomes more important. Advanced Oxidative Processes (A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F1/72C02F103/34
CPCB01J27/24B01J35/004C02F1/30C02F1/725C02F2103/343C02F2305/023C02F2305/10Y02W10/37
Inventor 王其召何宽施王磊佘厚德许海玉黄静伟
Owner NORTHWEST NORMAL UNIVERSITY
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