Preparation method of composite photocatalyst Ag/AgCl@Co3O4 and composite photocatalyst prepared by using preparation method

A composite light and catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, cobalt oxide/cobalt hydroxide, etc., can solve the problems of easy agglomeration, poor adsorption capacity of organic pollutants, and low catalytic efficiency, etc. The operation method is simple and the synthesis time is short.

Active Publication Date: 2020-07-28
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, noble metal nanoparticles have attracted close attention due to their obvious plasmonic effects in the visible region, especially Ag/AgX in metal/metal halides has been extensively studied due to its role in the photocatalytic process of elemental silver. It can coexist with silver halide, and the presence of silver in the form of nanoparticles can protect silver halide from photocorrosion and decomposition, and duri...

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  • Preparation method of composite photocatalyst Ag/AgCl@Co3O4 and composite photocatalyst prepared by using preparation method
  • Preparation method of composite photocatalyst Ag/AgCl@Co3O4 and composite photocatalyst prepared by using preparation method

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Embodiment 1

[0043] The following method is adopted to prepare the composite photocatalyst Ag / AgCl@Co according to the present invention 3 o 4 :

[0044] (1) The methanol (100mL) solution of 2-methylimidazole (6.489g, 0.08mol) was mixed rapidly with the methanol (100mL) solution of cobalt nitrate hexahydrate (2.933g, 0.01mol), and the Stirring for 5 hours, after the reaction was completed, the resulting mixture was centrifuged, washed three times with methanol, and dried at 60°C to obtain ZIF-67;

[0045] (2) calcining the ZIF-67 prepared in step (1) in a muffle furnace at a temperature of 400°C for 2 hours to obtain Co 3 o 4 nanoparticles;

[0046] (3) Take the Co 3 o 4 Nanoparticles (50mg) were added into methanol (20mL) and ultrasonically dispersed until completely dispersed to prepare Co 3 o 4 suspension;

[0047] (4) to the Co 3 o 4 Silver nitrate (0.3737g, 0.0022mol) was added to the suspension, and stirred for 0.5 hours under dark conditions to obtain a mixed suspension; ...

Embodiment 2

[0050] The following method is adopted to prepare the composite photocatalyst Ag / AgCl@Co according to the present invention 3 o 4 :

[0051] (1) The methanol (100mL) solution of 2-methylimidazole (6.489g, 0.08mol) was mixed rapidly with the methanol (100mL) solution of cobalt nitrate hexahydrate (2.933g, 0.01mol), and the Stirring for 5 hours, after the reaction was completed, the resulting mixture was centrifuged, washed three times with methanol, and dried at 60°C to obtain ZIF-67;

[0052] (2) calcining the ZIF-67 prepared in step (1) in a muffle furnace at a temperature of 500°C for 2 hours to obtain Co 3 o 4 nanoparticles;

[0053] (3) Take the Co 3 o 4 Nanoparticles (50mg) were added into methanol (20mL) and ultrasonically dispersed until completely dispersed to prepare Co 3 o 4 suspension;

[0054] (4) to the Co 3 o 4 Silver nitrate (0.3737g, 0.0022mol) was added to the suspension, and stirred for 0.5 hours under dark conditions to obtain a mixed suspension; ...

Embodiment 3

[0057] The following method is adopted to prepare the composite photocatalyst Ag / AgCl@Co according to the present invention 3 o 4 :

[0058] (1) The methanol (100mL) solution of 2-methylimidazole (7.398g, 0.09mol) was mixed rapidly with the methanol (100mL) solution of cobalt nitrate hexahydrate (2.619g, 0.009mol), and the Stirring for 5 hours, after the reaction was completed, the resulting mixture was centrifuged, washed three times with methanol, and dried at 60°C to obtain ZIF-67;

[0059] (2) Calcinate the ZIF-67 prepared in step (1) in a muffle furnace at a temperature of 350° C. for 2 hours to obtain Co 3 o 4 nanoparticles;

[0060] (3) Take the Co 3 o 4 Nanoparticles (40mg) were added into methanol (20mL) and ultrasonically dispersed until completely dispersed to prepare Co 3 o 4 suspension;

[0061] (4) to the Co 3 o 4 Silver nitrate (0.4417g, 0.0026mol) was added to the suspension, and stirred for 0.5 hours under dark conditions to obtain a mixed suspensio...

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Abstract

The invention discloses a preparation method of a composite photocatalyst Ag/AgCl@Co3O4 and the composite photocatalyst prepared by using the preparation method. The preparation method comprises the following steps: (1) subjecting a 2-methylimidazole solution and a cobalt salt solution to mixing and reacting so as to obtain ZIF-67; (2) calcining the ZIF-67 at a temperature of 350 to 700 DEG C to obtain Co3O4 nanoparticles; (3) dispersing the Co3O4 nanoparticles in an organic solvent to prepare a Co3O4 suspension; (4) adding a silver salt into the Co3O4 suspension, and carrying out stirring toobtain a mixed suspension; and (5) adding a cobalt chloride solution into the mixed suspension, carrying out stirring, and performing irradiating with ultraviolet visible light to obtain the compositephotocatalyst Ag/AgCl@Co3O4. The composite photocatalyst is uniform in particle, good in stability, high in cyclic utilization rate and good in absorption performance in ultraviolet and visible lightregions, so the composite photocatalyst has excellent photocatalytic degradation efficiency, the removal and degradation efficiency of organic matters in wastewater is greatly improved, and the composite photocatalyst has good application value and prospect in the field of photocatalysis.

Description

technical field [0001] The present invention relates to the field of catalysts, more specifically, to a composite photocatalyst Ag / AgCl@Co 3 o 4 The preparation method and the composite photocatalyst prepared therefrom. Background technique [0002] With the acceleration of the printing and dyeing industry in my country, the environmental problems caused by dye wastewater have become increasingly prominent. Traditional dye wastewater treatment methods cannot meet the growing needs due to their own drawbacks. In recent years, the new photocatalytic treatment technology has attracted a lot of research due to its advantages of low operating cost, not easy to produce secondary pollution, and can completely degrade pollutants. However, the cost and catalytic efficiency of photocatalyst itself restrict its development. Therefore, it is very necessary to develop an efficient, green and economical photocatalyst. [0003] In recent years, noble metal nanoparticles have attracted ...

Claims

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Application Information

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IPC IPC(8): B01J27/128B01J35/10B01J37/34C02F1/30B82Y40/00C01G51/04C01G5/02C02F101/30
CPCB01J27/128B01J35/004B01J35/1004B01J37/344B82Y40/00C01G5/02C01G51/04C01P2004/03C02F1/30C02F2101/308C02F2305/10
Inventor 常娜刘亚攀王海涛
Owner TIANJIN POLYTECHNIC UNIV
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