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Sea urchin-like CoZnAl-LDH/RGO/g-C3N4Z type heterojunction, and preparation method and application thereof

A g-c3n4z, sea urchin-shaped technology, applied in the field of semiconductor composite materials, can solve the problems that did not mention the semiconductor performance of LDHs materials, and achieve the effect of multiple catalytic reaction active sites, large specific surface area, and uniform particle size

Active Publication Date: 2018-12-18
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Patent CN104941672A discloses a single-layer hexagonal Ag 3 PO 4 / Fe 3 o 4 / Co-Ni LDH composite with Ag 3 PO 4 For semiconductors, Ag and Fe 3 o 4 As a co-catalyst, it is applied to the photocatalytic degradation of methyl orange. The composite material does not mention the semiconductor properties of LDHs materials

Method used

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  • Sea urchin-like CoZnAl-LDH/RGO/g-C3N4Z type heterojunction, and preparation method and application thereof
  • Sea urchin-like CoZnAl-LDH/RGO/g-C3N4Z type heterojunction, and preparation method and application thereof
  • Sea urchin-like CoZnAl-LDH/RGO/g-C3N4Z type heterojunction, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0028] Disperse 10 mg of reduced graphene oxide and 0.05 g of graphitic carbon nitride in 20 mL of deionized water, and sonicate for 30 min to obtain a uniformly dispersed suspension. 0.2912g (1.0mmol) of Co(NO 3 ) 2 ·6H 2 O, 0.2974g (1.0mmol) of Zn(NO 3 ) 2 9H 2 O, 0.3752g (1.0mmol) of Al(NO 3 ) 3 ·6H 2 O (1.0mmol) and 0.3600g (6.0mmol) urea were dissolved in 20ml deionized water and stirred for 30min to form a uniform mixed metal solution. Then the suspension of reduced graphene oxide and graphitic carbon nitride was added dropwise to the above mixed metal solution under vigorous stirring, stirred at room temperature for 30 min, then transferred to a stainless steel hydrothermal kettle (100 mL), and heated at 180 °C The hydrothermal reaction was carried out for 6h. After natural cooling, centrifuge, wash repeatedly with distilled water and absolute ethanol three times, and vacuum-dry at 60 °C to finally obtain the sea urchin-like CoZnAl-LDH / RGO / g-C 3 N 4 Z-shaped ...

Embodiment 2

[0030] Disperse 15 mg of reduced graphene oxide and 0.06 g of graphitic carbon nitride in 20 mL of deionized water, and sonicate for 30 min to obtain a uniformly dispersed suspension. 0.2912g (1.0mmol) of Co(NO 3 ) 2 ·6H 2 O, 0.2974g (1.0mmol) of Zn(NO 3 ) 2 9H 2O, 0.3752g (1.0mmol) of Al(NO 3 ) 3 ·6H 2 O (1.0mmol) and 0.3600g (6.0mmol) urea were dissolved in 20ml deionized water and stirred for 30min to form a uniform mixed metal solution. Then the suspension of reduced graphene oxide and graphitic carbon nitride was added dropwise to the above mixed metal solution under vigorous stirring, stirred at room temperature for 30 min, then transferred to a stainless steel hydrothermal kettle (100 mL), and heated at 180 °C Underwater thermal reaction 8h. After natural cooling, centrifuge, wash repeatedly with distilled water and absolute ethanol three times, and vacuum-dry at 60 °C to finally obtain the sea urchin-like CoZnAl-LDH / RGO / g-C 3 N 4 Z-shaped heterojunction.

Embodiment 3

[0032] Disperse 15 mg of reduced graphene oxide and 0.15 g of graphitic carbon nitride in 20 mL of deionized water, and sonicate for 30 min to obtain a uniformly dispersed suspension. 0.2912g (1.0mmol) of Co(NO 3 ) 2 ·6H 2 O, 0.2974g (1.0mmol) of Zn(NO 3 ) 2 9H 2 O, 0.3752g (1.0mmol) of Al(NO 3 ) 3 ·6H 2 O (1.0mmol) and 0.3600g (6.0mmol) urea were dissolved in 20ml deionized water and stirred for 30min to form a uniform mixed metal solution. Then the suspension of reduced graphene oxide and graphitic carbon nitride was added dropwise to the above mixed metal solution under vigorous stirring, stirred at room temperature for 30 min, then transferred to a stainless steel hydrothermal kettle (100 mL), and heated at 180 °C Underwater thermal reaction 8h. After natural cooling, centrifuge, wash with distilled water and absolute ethanol three times, and dry under vacuum at 60°C. Since the mass ratio of added graphitic carbon nitride and reduced graphene oxide exceeds 6:1, r...

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Abstract

The invention discloses a sea urchin-like CoZnAl-LDH / RGO / g-C3N4Z type heterojunction and a preparation method thereof. The sea urchin-like CoZnAl-LDH / RGO / g-C3N4Z type heterojunction is prepared by a simple hydrothermal reaction. The preparation method comprises the following steps: dropwise adding an ultrasonically dispersed reduced graphene oxide and graphite suspension to a deionized aqueous solution of cobalt nitrate, zinc nitrate, aluminum nitrate and urea, performing stirring, transferring the obtained mixture into an autoclave, and carrying out the high-temperature hydrothermal reactionto obtain the sea urchin-like CoZnAl-LDH / RGO / g-C3N4Z type heterojunction with a size of 5-7 [mu]m. The sea urchin-like CoZnAl-LDH / RGO / g-C3N4Z type heterojunction has the advantages of high specific surface area, high photon utilization rate and high photogenerated electron and hole separation efficiency, and can be applied to the fields of catalysis and energy conversion.

Description

technical field [0001] The invention belongs to the technical field of semiconductor composite materials, in particular to a sea urchin-like CoZnAl-LDH / RGO / g-C 3 N 4 Z-type heterojunction and its preparation method. Background technique [0002] With the development of industrialization of human society and the rapid growth of population, the problems of energy shortage and environmental pollution have become the focus of common attention all over the world. At present, fossil energy (oil, coal, and natural gas) is still the main energy source for human beings, and the development of renewable energy still requires a lot of technical support. Photocatalytic technology based on semiconductor materials is known as a green new technology and an ideal way to solve energy shortage and environmental pollution. Traditional TiO 2 Due to the defects of large bandgap width, low utilization rate of visible light and high recombination rate of photogenerated electrons and holes, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10B01J35/02C02F1/30C01B32/40B01J35/00
CPCC01B32/40C02F1/30B01J27/24C02F2305/10B01J35/39B01J35/00B01J35/30B01J35/61
Inventor 杨勇吴家家肖婷婷唐钲黄俊杰
Owner NANJING UNIV OF SCI & TECH
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