Preparation method of zinc oxide-active carbon composite catalysts

A technology of composite catalyst and activated carbon, which is applied in the field of materials, can solve the problems of unsatisfactory photocatalytic effect of composite catalyst and achieve good photocatalytic effect and good application prospect

Inactive Publication Date: 2019-03-22
张家港市沐和新材料技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, catalysts based on activated carbon and oxide nanomaterials have not been widely used, and the photocatalytic effect of the prepared composite catalysts is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The invention discloses a preparation method of a zinc oxide-activated carbon composite catalyst, comprising:

[0022] (1) Pretreatment of activated carbon: soak activated carbon in inorganic acid solution for 12-24 hours, filter, wash with deionized water until neutral, then soak in inorganic alkali solution for 12-24 hours, filter, wash with deionized water until neutral, dry, Obtain pretreated activated carbon;

[0023] (2) adding the above-mentioned pretreated activated carbon into deionized water, and ultrasonically dispersing for 6-8 hours to obtain activated carbon suspension;

[0024] (3) Add carbonate solution to the above activated carbon suspension, stir for 15 to 30 minutes, then add zinc salt solution, stir for 3 to 5 hours, filter with suction, dry, and calcinate at 280 to 400°C for 1 to 2 hours to obtain Zinc-activated carbon composite catalyst.

[0025] In the above step (1), the inorganic acid solution is selected from one of hydrochloric acid solutio...

Embodiment 1

[0030] Soak activated carbon in inorganic acid solution for 12 hours, filter, wash with deionized water until neutral, then soak in inorganic alkali solution for 12 hours, filter, wash with deionized water until neutral, and dry to obtain pretreated activated carbon;

[0031] Add the above-mentioned pretreated activated carbon into deionized water, and ultrasonically disperse for 6 hours to obtain an activated carbon suspension;

[0032] Add carbonate solution to the activated carbon suspension, stir for 15-30 minutes, then add zinc salt solution, stir for 3 hours, filter with suction, dry, and calcinate at 280°C for 1 hour to obtain a zinc oxide-activated carbon composite catalyst.

[0033] In this example, in the zinc oxide-activated carbon composite catalyst prepared according to the above method, the mass ratio of zinc oxide to activated carbon is 1:10, and the photocatalytic efficiency of the catalyst is 80%.

Embodiment 2

[0035] Soak activated carbon in inorganic acid solution for 18 hours, filter, wash with deionized water until neutral, then soak in inorganic alkali solution for 18 hours, filter, wash with deionized water until neutral, and dry to obtain pretreated activated carbon;

[0036] Add the above-mentioned pretreated activated carbon into deionized water, and ultrasonically disperse for 7 hours to obtain an activated carbon suspension;

[0037] Add carbonate solution to the activated carbon suspension, stir for 15-30 minutes, then add zinc salt solution, stir for 4 hours, filter with suction, dry, and calcinate at 300°C for 1.5 hours to obtain a zinc oxide-activated carbon composite catalyst.

[0038] In this example, in the zinc oxide-activated carbon composite catalyst prepared according to the above method, the mass ratio of zinc oxide to activated carbon is 1:5, and the photocatalytic efficiency of the catalyst is 95%.

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Abstract

The invention discloses a preparation method of zinc oxide-active carbon composite catalysts. The method comprises the following steps of (1) active carbon pretreatment: soaking the active carbon withan inorganic acid solution for 12 to 24 h; performing filtering; washing the materials to a neutral state by deionized water; performing soaking for 12 to 24 h with an inorganic basic solution; performing filtering; washing the materials to a neutral state by deionized water; performing drying; obtaining the pretreated active carbon; (2) adding the pretreated active carbon into the deionized water; performing ultrasonic dispersion for 6 to 8 h, thus obtaining an active carbon suspension; (3) adding a carbonate solution into the active carbon suspension; performing stirring for 15 to 30 min; then, adding a zinc salt solution; performing stirring for 3 to 5 h; performing suction filtering and drying; performing roasting for 1 to 2 h at the temperature of 280 to 400 DEG C to obtain the zincoxide-active carbon composite catalysts. The zinc oxide-active carbon composite catalysts have good photocatalysis effects; good application prospects are realized in aspects of industrial waste waterand waste gas treatment.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a preparation method of a zinc oxide-activated carbon composite catalyst. Background technique [0002] Organic wastewater is a kind of wastewater that is difficult to degrade. Taking printing and dyeing wastewater as an example, it has a large amount of discharge, high content of organic pollutants, and complex types. Due to the stable chemical structure, high toxicity and high difficulty of treatment of organic pollutants, the traditional treatment technology has been severely challenged. It is difficult to achieve a satisfactory treatment effect by applying conventional treatment techniques, such as physical and chemical methods, chemical methods, biological methods and their combinations. [0003] The use of photocatalytic technology to treat various refractory organic substances in wastewater has become a hot topic of current research. At present, most of the commonly u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06
CPCB01J23/06B01J35/004B01J37/0207B01J37/0211
Inventor 黄俊
Owner 张家港市沐和新材料技术开发有限公司
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