Preparation method and application of FeS2/g-C3N4 heterojunction material

A g-c3n4, heterojunction technology, applied in chemical instruments and methods, water/sludge/sewage treatment, chemical/physical processes, etc., can solve carcinogenic secondary pollutants, cannot be effectively degraded, not easy to degrade and easily Accumulation and other problems, to achieve the effect of low cost of raw materials, environmental protection and pollution-free preparation process, good removal effect

Active Publication Date: 2019-08-02
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its high water solubility, not easy to degrade and easy to accumulate in the environment, TCs remaining in livestock and poultry wastewater can produce huge ecotoxicological effects, and induce bacteria to develop drug resistance, endangering human health
However, tetracycline hydrochloride has a strong inhibitory effect on biological processes, and conventional biological treatment processes cannot effectively remove it
Conventional physical methods such as adsorption, reverse osmosis and nanofiltration can remove tetracycline hydrochloride in some water, but cannot effectively degrade it
Chemical oxidation methods such as liquid chlorine oxidation can degrade tetracycline hydrochloride, but can produce carcinogenic secondary pollutants

Method used

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  • Preparation method and application of FeS2/g-C3N4 heterojunction material
  • Preparation method and application of FeS2/g-C3N4 heterojunction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] FeS 2 / g -C 3 N 4 A method for preparing a heterojunction material, comprising the steps of:

[0024] Step 1: Weigh 1g of melamine and place it in a tube furnace, blow it with nitrogen, and fire it at 550°C for 2 hours (the heating rate is 10°C / min) to form a block g-C 3 N 4 . Then it was fired at 500°C for 2 hours (the heating rate was 5°C / min) to make flake g-C 3 N 4 .

[0025] Step 2: Add 0.025mol FeSO to the 50mL reactor 4 ·7H 2 O, 0.025mol Na 2 S 2 o 3 ·5H 2O and 0.0125mol sulfur powder, mix well and add 25mL deionized water. Hydrothermal reaction was carried out at 180° C. for 24 hours in a blast drying oven. After the reaction, cool to room temperature, put the obtained black precipitate into a centrifuge tube, wash it with deionized water, dilute sulfuric acid and carbon disulfide, and finally dry it in vacuum at 80°C for 6 hours, which is FeS 2 .

[0026] Step 3: Add 50mL methanol to the beaker, then add 0.05g FeS 2 , ultrasonic bath for 15 min...

Embodiment 2

[0028] FeS 2 / g -C 3 N 4 A method for preparing a heterojunction material, comprising the steps of:

[0029] Step 1: Weigh 1g of melamine and place it in a tube furnace, blow it with nitrogen, and fire it at 560°C for 1.8 hours (the heating rate is 10°C / min) to form a block g-C 3 N 4 . Then it was fired at 490°C for 1.8 hours (the heating rate was 5°C / min) to make flake g-C 3 N 4 .

[0030] Step 2: Add 0.025mol FeSO to the 50mL reactor 4 ·7H 2 O, 0.025mol Na 2 S 2 o 3 ·5H 2 O and 0.0125mol sulfur powder, after mixing evenly, add 25mL deionized water. Hydrothermal reaction at 170°C for 24 hours in a blast drying oven. After the reaction, cool to room temperature, put the obtained black precipitate into a centrifuge tube, wash it with deionized water, dilute sulfuric acid and carbon disulfide, and finally dry it in vacuum at 70°C for 7 hours, which is FeS 2 .

[0031] Step 3: Add 50mL of methanol to the beaker, then add 0.1g of FeS 2 , ultrasonic bath for 20 min...

Embodiment 3

[0033] FeS 2 / g -C 3 N 4 A method for preparing a heterojunction material, comprising the steps of:

[0034] Step 1: Weigh 1g of melamine and place it in a tube furnace, blow it with nitrogen, and fire it at 550°C for 2 hours (the heating rate is 10°C / min) to form a block g-C 3 N 4 . Then it was fired at 500°C for 2 hours (the heating rate was 5°C / min) to make flake g-C 3 N 4 .

[0035] Step 2: Add 0.025mol FeSO to the 50mL reactor 4 ·7H 2 O, 0.025mol Na 2 S 2 o 3 ·5H 2 O and 0.0125mol sulfur powder, mix well and add 25mL deionized water. Hydrothermal reaction was carried out at 180° C. for 24 hours in a blast drying oven. After the reaction, cool to room temperature, put the obtained black precipitate into a centrifuge tube, wash it with deionized water, dilute sulfuric acid and carbon disulfide, and finally dry it in vacuum at 80°C for 6 hours, which is FeS 2 .

[0036] Step 3: Add 50mL of methanol to the beaker, then add 0.15g of FeS 2 , ultrasonic bath for...

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Abstract

The invention discloses a preparation method and an application of a FeS2 / g-C3N4 heterojunction material. The preparation method comprises steps as follows: melamine is added to a tubular furnace andcalcined, and g-C3N4 is prepared; besides, FeSO4.7H2O, Na2S2O3.5H2O, powdered sulfur and deionized water are added to a reaction kettle and subjected to a hydrothermal reaction, FeS2 is prepared, theproduct is repeatedly washed with dilute sulfuric acid, carbon disulfide and deionized water, finally, g-C3N4 and FeS2 in a certain ratio are dissolved in a methanol solution, the mixed solution is subjected to ultrasonic bath, water-bath heating is performed to volatilize methanol, an obtained product is calcined in a muffle furnace, and the FeS2 / g-C3N4 heterojunction material can be prepared. The preparation method has a simple process and is pollution-free, low in manufacturing cost and environmentally friendly, and a prepared composite catalyst has a good treatment effect.

Description

technical field [0001] The invention relates to the technical field of composite material synthesis, more specifically to FeS 2 / g -C 3 N 4 Preparation methods and applications of heterojunction materials. Background technique [0002] Tetracycline antibiotics (tetracyclines, TCs), as a class of broad-spectrum antibiotics, are widely used in the prevention and treatment of animal bacterial infection diseases in large-scale livestock and poultry farms worldwide. The annual production, import and consumption of tetracyclines in my country is quite huge. Due to its high water solubility, not easy to degrade and accumulate in the environment, the residual TCs in livestock and poultry wastewater can produce huge ecotoxicological effects, induce bacterial resistance, and endanger human health. However, tetracycline hydrochloride has a strong inhibitory effect on biological processes, and conventional biological treatment processes cannot effectively remove it. Conventional ph...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/38
CPCB01J27/24C02F1/30C02F2101/38C02F2305/10B01J35/39
Inventor 李莉赵志伟袁艺鸣张赛黄俊代勤
Owner CHONGQING UNIV
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