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Preparation and application of ultrathin two-dimensional layered composite photocatalytic materials

A composite photocatalytic, two-dimensional layered technology, applied in the field of photocatalytic materials, can solve the problems of complex preparation process, damage to tooth and bone development, etc., and achieve the effects of simple preparation process, multiple active sites, and broad application prospects.

Active Publication Date: 2022-04-12
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Tetracycline antibiotics are widely used to prevent infections caused by bacteria, etc., but at the same time, they can also cause serious damage to the development of the liver, kidney, teeth and bones of the human body, and children are generally prohibited from using them.
[0004] But above-mentioned disclosed preparation method all has the defect that preparation process is complicated

Method used

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  • Preparation and application of ultrathin two-dimensional layered composite photocatalytic materials
  • Preparation and application of ultrathin two-dimensional layered composite photocatalytic materials
  • Preparation and application of ultrathin two-dimensional layered composite photocatalytic materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 5g of urea into a 25mL crucible, heat to 550°C in a muffle furnace at a heating rate of 5°C / min, keep it warm for 4 hours, cool naturally to 20°C, and then heat to 520°C at a heating rate of 2°C / min , keep warm for 2h, cool naturally at 25°C, grind into powder, and get g-C 3 N 4 nanosheets; 0.2 g of g-C 3 N 4 The nanosheets were dispersed into a three-necked flask filled with 100 mL of deionized water, then 1 mL of graphene oxide solution with a mass volume concentration of 2 mg / mL was added, and ultrasonically stirred for 20 min to make g-C 3 N 4 Mix the nanosheets and graphene oxide evenly, cool and reflux at 95°C, stir for 6 hours, and wash the solution by centrifugation after cooling to obtain g-C 3 N 4 / rGO complex; 0.2289g of In(NO 3 ) 3 ·5H 2 O, 0.3645g of cetyltrimethylammonium bromide and 0.135g of thioacetamide were added to a three-necked flask containing 100mL of deionized water, stirred ultrasonically for 20min, and then added 0.2g of g-C 3 N...

Embodiment 2

[0034] Weigh 20g of urea into a 100mL crucible, heat it to 535°C in a muffle furnace at a heating rate of 3.5°C / min, keep it warm for 3 hours, and cool it down to 25°C in natural cooling, then heat it to 550°C at a heating rate of 5°C / min , keep warm for 4h, cool naturally at 30°C, grind into powder, and get g-C 3 N 4 nanosheets; 1 g of g-C 3 N 4 The nanosheets were dispersed into a three-necked flask filled with 200 mL of deionized water, and then 5 mL of graphene oxide solution with a mass volume concentration of 2 mg / mL was added, and stirred ultrasonically for 30 min to make the g-C 3 N 4 Mix the nanosheets and graphene oxide evenly, cool and reflux at 90°C, stir for 4 hours, and wash the solution by centrifugation after cooling to obtain g-C 3 N 4 / rGO complex; 0.0457g of In(NO 3 ) 3 ·5H 2 O, 0.9113g of cetyltrimethylammonium bromide and 0.189g of thioacetamide were added to a three-necked flask containing 200mL of deionized water, stirred ultrasonically for 15min...

Embodiment 3

[0036] Weigh 12.5g of urea into a 65mL crucible, heat it to 520°C in a muffle furnace at a heating rate of 2°C / min, keep it warm for 2h, cool naturally to 30°C, and then heat it to 535°C at a heating rate of 3.5°C / min ℃, keep warm for 3h, cool naturally at 20℃, grind into powder, and get g-C 3 N 4 nanosheets; 0.6 g of g-C 3 N 4 The nanosheets were dispersed into a three-neck flask filled with 40 mL of deionized water, then 3 mL of graphene oxide solution with a mass volume concentration of 2 mg / mL was added, and ultrasonically stirred for 25 min to make the g-C 3 N 4 Mix the nanosheets and graphene oxide evenly, cool and reflux at 92.5°C, stir for 5 hours, and wash the solution by centrifugation after cooling to obtain g-C 3 N 4 / rGO complex; 0.3205g of In(NO 3 ) 3 ·5H 2 O. Add 1.4580g of cetyltrimethylammonium bromide and 0.027g of thioacetamide into a three-necked flask containing 150mL of deionized water, stir ultrasonically for 10min, and then add 0.15g of g-C 3 N...

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Abstract

The invention discloses the preparation and application of an ultra-thin two-dimensional layered composite photocatalytic material. After heating, heat preservation and natural cooling of urea, heating again, heat preservation, natural cooling and grinding, g-C is obtained. 3 N 4 nanosheets; the g‑C 3 N 4 Disperse the nanosheets in deionized water, then add graphene oxide solution, ultrasonically stir, cool to reflux, stir, after cooling, centrifuge and wash to obtain g‑C 3 N 4 / rGO complex; the In(NO 3 ) 3 ·5H 2 O, cetyltrimethylammonium bromide and thioacetamide were added to deionized water, stirred ultrasonically, and then added g‑C 3 N 4 / rGO composite, ultrasonic stirring, cooling and reflux, stirring, cooling, centrifugal washing, and vacuum drying to obtain an ultrathin two-dimensional layered composite photocatalytic material. The preparation method has a simple process, and the prepared photocatalytic material has a wide visible light response range, and has an efficient effect of degrading tetracycline hydrochloride under visible light irradiation.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and relates to the preparation and application of a photocatalytic material. The photocatalyst has high efficient tetracycline hydrochloride degradation performance under visible light irradiation, and has broad prospects in the application of treating residual tetracycline antibiotics in wastewater. Background technique [0002] With the widespread use of tetracycline antibiotics, solving the residues of such drugs in aqueous solutions has become a major problem that society must face today. Tetracycline antibiotics are widely used to prevent infections caused by bacteria, etc., but at the same time, they can also cause serious damage to the development of the liver, kidney, teeth and bones of the human body, and children are generally prohibited from using them. Tetracycline antibiotics taken by humans or animals are only partially absorbed, and most of them are excreted throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24C02F1/30C02F2101/34C02F2101/345C02F2101/36C02F2101/38C02F2305/10B01J35/39
Inventor 刘斌张新强李振王育华
Owner LANZHOU UNIVERSITY
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