Sea urchin-shaped cobalt-based photocatalyst and preparation method thereof

A photocatalyst, sea urchin-like technology, applied in the field of photocatalysis, can solve the problems of low catalytic efficiency, small specific surface area, complicated preparation, etc., and achieve the effects of high photocatalytic efficiency, large specific surface area, and low preparation difficulty

Pending Publication Date: 2020-11-03
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to overcome the shortcomings of low catalytic efficiency, complicated preparation and high cost caused by the small specific surface area of ​

Method used

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  • Sea urchin-shaped cobalt-based photocatalyst and preparation method thereof
  • Sea urchin-shaped cobalt-based photocatalyst and preparation method thereof
  • Sea urchin-shaped cobalt-based photocatalyst and preparation method thereof

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preparation example Construction

[0030] A kind of sea urchin-like cobalt-based photocatalyst provided by the invention and preparation method thereof, specifically comprise the following steps:

[0031] (1) Put 1 to 2 mol of p-aminobenzoic acid into 10 to 20 mL of a mixed solution containing equal volumes of DMF and ethanol, and stir for 10 to 30 minutes to obtain the organic ligand L;

[0032] (2) Add 1.5mol Co(NO 3 ) 2 ·6H 2 O, stirring for 10 to 30 minutes to form a mixed solution;

[0033] (3) Transfer the mixed solution to a stainless steel autoclave lined with Teflon, put it into a drying oven at 150-230° C. and heat it for 10-20 hours, and after cooling to 20-30° C., filter to obtain the primary product of the catalyst;

[0034] (4) Wash the catalyst primary product with 5-10mL DMF and 5-10mL ethanol respectively until its weight no longer changes, then dry the catalyst primary product in a vacuum oven at 70-90°C for 10-15 hours to obtain sea urchin-shaped The final cobalt-based photocatalyst.

Embodiment 1

[0036] A sea urchin-shaped cobalt-based photocatalyst and a preparation method thereof, specifically comprising the following steps:

[0037] (1) Put 1mol p-aminobenzoic acid into 10mL mixed solution containing equal volume of DMF and ethanol, stir for 10 minutes to obtain organic ligand L;

[0038] (2) Add 1.5mol Co(NO 3 ) 2 ·6H 2 O, stirred for 10 minutes to form a mixed solution;

[0039] (3) Transfer the mixed solution to a stainless steel autoclave with Teflon lining, put it into a drying oven at 150° C. and heat it for 10 hours, and after cooling to 25° C., filter to obtain the catalyst primary product;

[0040] (4) Wash the primary catalyst product 3 times with 5mL DMF and 5mL ethanol, until its weight no longer changes, then dry the primary catalyst product in a vacuum oven at 70°C for 10 hours to obtain the final product of sea urchin-like cobalt-based photocatalyst .

[0041] Figure 4 It is a 2000 times enlarged SEM image of a kind of sea urchin-like cobalt-ba...

Embodiment 2

[0043] A sea urchin-shaped cobalt-based photocatalyst and a preparation method thereof, specifically comprising the following steps:

[0044] (1) Put 1.5mol p-aminobenzoic acid into 15mL mixed solution containing equal volume of DMF and ethanol, stir for 20 minutes to obtain organic ligand L;

[0045] (2) Add 1.5mol Co(NO 3 ) 2 ·6H 2 O, stirred for 20 minutes to form a mixed solution;

[0046] (3) Transfer the mixed solution to a stainless steel autoclave with Teflon lining, put it into a drying oven at 200° C. and heat it for 15 hours, and after cooling to 25° C., filter to obtain the catalyst primary product;

[0047] (4) Wash the primary catalyst product 3 times with 7mL DMF and 7mL ethanol, until its weight no longer changes, then dry the primary catalyst product in a vacuum oven at 80°C for 12 hours to obtain the final product of sea urchin-like cobalt-based photocatalyst .

[0048] figure 2 It is a 5000 times enlarged SEM figure of a kind of sea urchin-shaped coba...

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Abstract

The invention relates to the technical field of photocatalysis, in particular to a sea urchin-shaped cobalt-based photocatalyst, which comprises a complex composed of an organic ligand L and cobalt nitrate hexahydrate, the complex is of a sea urchin-shaped microsphere structure formed by arranging a plurality of nanoneedle-shaped complex crystals, and the main body of the organic ligand L is p-aminobenzoic acid; the preparation method comprises the following steps: (1) mixing and stirring an organic ligand L and cobalt nitrate hexahydrate to form a mixed solution; (2) heating, cooling and filtering the mixed solution to obtain a mixed solid; and (3) washing the mixed solid with an organic solvent, and carrying out vacuum drying to obtain the urchin-shaped cobalt-based photocatalyst. The sea urchin-shaped microsphere structure cobalt-based catalyst formed by the obtained nano needle-shaped complex crystal has a very large specific surface area and high photocatalytic efficiency; the method has the advantages of few reaction components, simple steps, low preparation difficulty and no noble metal component, and greatly reduced cost.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a sea urchin-shaped cobalt-based photocatalyst and a preparation method thereof. Background technique [0002] With the development of industrialization of human society and the rapid growth of population, energy shortage and environmental pollution have become the focus of common attention all over the world, and solar energy, as a clean, priceless and eternal energy, can be directly absorbed in the photocatalytic reduction reaction. Utilization, and the photocatalytic reduction system is simple and easy to control, so it is becoming an important research direction. [0003] In order to improve the photocatalytic efficiency, people have been working hard to find photocatalysts with high catalytic activity and high selectivity. The photocatalyst currently used is generally TiO 2 、 Bi 2 WO 6 Noble metal catalysts, etc., such as "a titanium dioxide composite photocatalys...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/00B01J35/02B01J35/10
CPCB01J31/2226B01J35/004B01J35/026B01J35/10B01J2531/845B01J2540/40B01J2540/68
Inventor 郑辉杨思炜沈圆芳洪怡心陈雨彤
Owner HANGZHOU NORMAL UNIVERSITY
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