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Nano ag/coo-n catalyst and its preparation method and application

A catalyst and nano technology, applied in the field of nano Ag/CoO-N catalyst and its preparation, can solve the problems of large forbidden band width and low utilization rate of sunlight, achieve uniform distribution, simple and easy preparation method, and excellent catalytic performance Effect

Active Publication Date: 2020-04-28
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, TiO 2 The band gap itself is large, it can only absorb ultraviolet light, and the utilization rate of sunlight is low. Therefore, TiO 2 There are great limitations in practical application

Method used

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  • Nano ag/coo-n catalyst and its preparation method and application
  • Nano ag/coo-n catalyst and its preparation method and application
  • Nano ag/coo-n catalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0045] This specific example discloses a nano-Ag / CoO-N catalyst and its preparation method. The steps of the preparation method are as follows:

[0046] S10: 1g Co(NO 3 ) 2 ·5H 2 O was added to 50mL ethanol solution and stirred for 30min;

[0047] S20: Add 5 mL of ammonia water to the mixed solution prepared in step S10, and stir for 15 min;

[0048] S30: Put the mixed solution prepared in step S20 in a 500mL supercritical kettle, inject 200mL of ethanol into the kettle, raise the temperature to 240°C and keep it for 70 minutes, and the heating rate is 2°C / min;

[0049] S40: washing the product obtained in step S30 three times with ethanol and deionized water;

[0050] S50: centrifuging the product obtained in step S40, and drying at 80° C. for 24 hours to obtain a nano-CoO-N visible light catalyst;

[0051] S60: Put 100 mg of the nano-CoO-N visible light catalyst obtained in step S50 into a 250 mL beaker, and add 24 mL of silver nitrate solution (200 mg / L) at the same ti...

Embodiment 2

[0059] Embodiment 2 discloses another specific embodiment of the nano-Ag / CoO-N catalyst of the present invention, and its preparation method is basically the same as that of Embodiment 1, the only difference being that the specific silver nitrate solution added in step S60 The amount is different, in step S60 of this specific embodiment, add 8mL silver nitrate solution, the concentration of silver nitrate solution is still 200mg / L, all the other steps and parameters are the same as embodiment 1, thus finally obtain Ag mass proportion is 1 % octahedral Ag / CoO-N visible photocatalyst.

[0060] Depend on figure 2 It can be seen from the XRD pattern shown that the Ag / CoO-N photocatalyst in this specific example has a good crystallinity and no impurities are formed. Such as Figure 6 As shown, this example has a certain photocatalytic killing performance on Acinetobacter baumannii under visible light.

Embodiment 3

[0062] Embodiment 3 discloses another specific embodiment of the nano-Ag / CoO-N catalyst of the present invention, and its preparation method is basically the same as that of Embodiment 1, except that the specific silver nitrate solution added in step S60 The amount is different, in the step S60 of this specific embodiment, add 40mL silver nitrate solution, the concentration of silver nitrate solution is still 200mg / L, all the other steps and parameters are all the same as embodiment 1, thus finally obtained Ag mass ratio is 5 % octahedral Ag / CoO-N visible photocatalyst.

[0063] Depend on figure 2 It can be seen from the XRD pattern shown that the Ag / CoO-N photocatalyst in this specific example has a good crystallinity and no impurities are formed. Such as Figure 6 As shown, this example has a certain photocatalytic killing performance on Acinetobacter baumannii under visible light.

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Abstract

The invention discloses an Ag / CoO-N catalyst as well as a preparation method and application thereof. The nanometer Ag / CoO-N catalyst is prepared from Ag nanoparticles and CoO-N nanoparticles; the Agnanoparticles and the CoO-N nanoparticles are tightly combined and are uniformly dispersed; the Ag mass accounts for 1 to 7 percent of the total mass of Ag and CoO-N. The preparation method comprisesthe following steps that a Co(NO3)2.5H2O and ethanol mixed solution is prepared; after ammonia water is added, the mixture is put into a supercritical kettle; ethanol is injected; heating and heat insulation are performed; products in the supercritical kettle are cleaned by ethanol and deionized water; the cleaned products are dried and centrifuged to obtain a nanometer CoO-N visible light photocatalyst; the nanometer CoO-N visible light photocatalyst and a silver nitrate solution are mixed, wherein the Ag mass accounts for 1 to 7 percent of the total mass of Ag and CoO-N; a sacrifice agent isadded into the mixture; an xenon lamp is used for irradiating the mixture; then, the ethanol and the de-ionized water are used for cleaning; the cleaned products are dried and centrifuged to obtain the nanometer Ag / CoO-N catalyst. The catalyst efficiency of the catalyst is high; the stability is high; the raw materials are easily obtained; the preparation method can be easily operated.

Description

technical field [0001] The invention relates to the technical field of preparation of semiconductor photocatalytic materials, in particular to a nano-Ag / CoO-N catalyst and its preparation method and application. Background technique [0002] With the rapid development of global industry, environmental problems have become increasingly prominent. Photocatalytic technology is favored because it can use solar energy to solve environmental pollution problems. At the same time, semiconductor photocatalysis technology has outstanding advantages such as high efficiency, low energy consumption, mild reaction conditions, wide application range and reduction of secondary pollution. Among them, titanium dioxide has become a research hotspot due to its high photocatalytic activity, high stability, safety and non-toxicity, and has broad application prospects in wastewater treatment, antibacterial self-cleaning, solar cells, gas sensors and other fields. However, TiO 2 The band gap its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/10B82Y30/00B82Y40/00A01N59/16A01P1/00
Inventor 霍宇凝杨国详罗柳林刘文华杨玉萍邹泉李和兴
Owner SHANGHAI NORMAL UNIVERSITY