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Graphene oxide/carbon nitride/bismuth oxyiodide composite material and its preparation method and application

A composite material, bismuth iodide technology, applied in chemical instruments and methods, botanical equipment and methods, applications, etc., can solve the problems of limited application of bismuth iodide monomer, low antibacterial effect, high recombination rate, and achieve high application Prospect and practical value, simple and easy preparation method, low product cost effect

Active Publication Date: 2020-06-09
JIANGSU UNIV
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  • Description
  • Claims
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Problems solved by technology

However, due to the high recombination rate of photogenerated electron-hole pairs, the application of bismuth oxyiodide monomer is limited to a certain extent.
[0003] Combining with semiconductor material carbon nitride is an effective way to improve the photocatalytic activity of bismuth oxyiodide, but the antibacterial effect of carbon nitride-bismuth oxyiodide composite materials reported in the prior art is still low, which limits the use of carbon nitride-iodine Application of bismuth oxide composite materials in the field of photocatalytic deactivation of microorganisms

Method used

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  • Graphene oxide/carbon nitride/bismuth oxyiodide composite material and its preparation method and application
  • Graphene oxide/carbon nitride/bismuth oxyiodide composite material and its preparation method and application
  • Graphene oxide/carbon nitride/bismuth oxyiodide composite material and its preparation method and application

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Experimental program
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preparation example Construction

[0025] Preparation of bismuth oxyiodide (BiOI): Weigh 0.332g of potassium iodide and dissolve it in 40mL of distilled water to prepare potassium iodide solution; weigh 0.97g of bismuth nitrate pentahydrate and dissolve it in 30mL of ethylene glycol to prepare bismuth nitrate pentahydrate ethylene glycol solution; Add the potassium iodide solution drop by drop into the bismuth nitrate pentahydrate ethylene glycol solution, stir at room temperature for 60 minutes, wash with water, dry the resulting precipitate in an oven at 60°C, grind it, and use it as the reference substance BiOI.

[0026] Carbon nitride (g-C 3 N 4 ) preparation: Weigh 4.0g of urea, calcinate in a muffle furnace at 520°C for 4h, cool, and grind to obtain g-C 3 N 4 .

[0027] Carbon nitride / bismuth oxyiodide (g-C 3 N 4 / BiOI) preparation: Weigh 0.332g of potassium iodide and dissolve it in 40mL of distilled water, add 0.176g of g-C 3 N 4 , sonicate to disperse it (referred to as solution A); weigh 0.97g ...

Embodiment 1

[0029] g-C 3 N 4 Preparation: Weigh 4.0g urea, calcinate in muffle furnace at 550°C for 3h, cool and grind to get g-C 3 N 4 .

[0030] GO / g-C 3 N 4 / Preparation of BiOI: Weigh 0.332 g of potassium iodide and dissolve it in 41 mL of distilled water, add 0.47 mL of graphene oxide (GO) solution (1 mg / mL) and 0.235 g of g-C 3 N 4 , sonicate to disperse it to obtain a suspension solution; weigh 0.97g bismuth nitrate pentahydrate and dissolve it in 38.8mL ethylene glycol solution to prepare bismuth nitrate pentahydrate ethylene glycol solution; drop the suspension solution into nitric acid pentahydrate Bismuth ethylene glycol solution, stirred at room temperature for 90 minutes, the resulting precipitate was washed with water, dried in an oven at 60°C, and ground to obtain a graphene oxide / carbon nitride / bismuth oxyiodide composite material, in which graphene oxide, carbon nitride, iodine The mass percentage of bismuth oxide is 0.05%, 25%, 74.95%.

[0031] The resulting GO / g...

Embodiment 2

[0033] g-C 3 N 4 Preparation: Weigh 4.0g of urea, calcinate in muffle furnace at 520°C for 5h, cool, grind to get g-C 3 N 4 .

[0034] GO / g-C 3 N 4 / BiOI preparation: Weigh 0.332 g of potassium iodide and dissolve it in 22.7 mL of distilled water, add 7.49 mL of GO solution (1 mg / mL) and 0.037 g of g-C 3 N 4, sonicated to disperse it to obtain a suspension solution; weigh 0.97g bismuth nitrate pentahydrate and dissolve it in 24.3mL ethylene glycol solution to prepare bismuth nitrate pentahydrate ethylene glycol solution; drop the suspension solution into nitric acid pentahydrate Bismuth ethylene glycol solution, stirred at room temperature for 60 minutes, the resulting precipitate was washed with water, dried in an oven at 90°C, and ground to obtain a graphene oxide / carbon nitride / bismuth oxyiodide composite material, in which graphene oxide, carbon nitride, iodine The mass percentage of bismuth oxide is 1%, 5%, 94%.

[0035] GO / g-C obtained in this example 3 N 4 / Bi...

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Abstract

The invention belongs to the field of nanocomposite material preparation and application, and relates to a kind of graphene oxide / carbon nitride / bismuth iodine oxide (GO / g-C 3 N 4 / BiOI) composite materials and their preparation methods and applications; the present invention combines carbon nitride, graphene oxide and bismuth iodide in situ to form a heterojunction between graphene oxide, carbon nitride and bismuth iodide. structure, effectively reducing the recombination probability of photogenerated electron-hole pairs in the composite material; the preparation method is simple and easy to implement, the product cost is low, easy for industrial production, and has high application prospects and practical value; the composite material has good visible light inactivation The performance of Escherichia coli, Staphylococcus aureus and Candida albicans can be used in the field of photocatalytic inactivation of microorganisms.

Description

technical field [0001] The invention belongs to the field of preparation and application of nanocomposite materials, in particular to a graphene oxide / carbon nitride / bismuth oxyiodide (GO / g-C 3 N 4 / BiOI) composite materials and their preparation methods and applications. Background technique [0002] In recent years, bacteria, viruses, etc. have posed a huge threat to human health. Common sterilization methods include ray sterilization, dry heat sterilization, moist heat sterilization, filter sterilization and chemical reagent sterilization. Heat sterilization, moist heat sterilization, and filter sterilization all require the use of specific instruments and equipment, and the conditions are relatively harsh; chemical reagents are more commonly used for sterilization, such as formaldehyde, ethylene oxide, peracetic acid, silver ions, etc., but these reagents are harmful to Both the human body and the environment have certain toxic and side effects. Photocatalytic technol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24A01N59/12A01N59/00A01P3/00A01P1/00
CPCA01N59/00A01N59/12B01J27/24B01J35/39
Inventor 李夜平王倩盛丹玫黄立英杨娟程晓农
Owner JIANGSU UNIV
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