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Preparation method of cobalt-zinc oxide composite catalyst

A technology of composite catalyst and zinc oxide, which is applied in the field of preparation of cobalt-zinc oxide composite catalyst, can solve problems such as ecological environment and human health hazards, and achieve stable performance, strong market application prospects, and strong absorption and catalytic effects

Inactive Publication Date: 2015-11-11
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Soluble cobalt salts will be discharged with water after the reaction is completed. However, "cobalt" is a heavy metal element that can be enriched in organisms and can accumulate in the human body through the food chain, so it has potential hazards to the ecological environment and human health.

Method used

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  • Preparation method of cobalt-zinc oxide composite catalyst
  • Preparation method of cobalt-zinc oxide composite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) Take 2.5891g ZnCl 2 Dissolve in 30mL deionized water, and wait for complete dissolution to obtain ZnCl 2 solution; (2) Add 15g of glucose to hot ZnCl at one time 2 solution, stir while adding to make it dissolve rapidly, and obtain solution X; (3) add 0.2811g CoSO to the heated solution X at one time 4 ?7H 2 O, stir while adding, continue heating to evaporate water, and obtain a brown-black solid; (4) Put the brown-black solid in a drying oven at 100°C for 8 hours, transfer it to an evaporating dish and place it in a calcination box at 600°C for 4 hours. A cobalt-zinc oxide composite catalyst with a cobalt mass content of 5% was prepared. 0.01g cobalt-zinc oxide composite catalyst 15min to 25mg L -1 The degradation efficiency of rhodamine B dye wastewater was 10.42%.

Embodiment 2

[0014] (1) Take 4.4067g ZnCl 2 Dissolve in 30mL deionized water, and wait for complete dissolution to obtain ZnCl 2 solution; (2) Add 15g of glucose to hot ZnCl at one time 2 solution, stir while adding to make it dissolve rapidly, and obtain solution X; (3) add 0.2811g CoSO to the heated solution X at one time 4 ?7H 2 O, stir while adding, continue heating to evaporate water, and obtain a brown-black solid; (4) Put the brown-black solid in a drying oven at 100°C for 8 hours, transfer it to an evaporating dish and place it in a calcination box at 600°C for 4 hours. A cobalt-zinc oxide composite catalyst with a cobalt mass content of 3% was obtained. 0.01mol·L under normal room temperature -1 In the oxidation system composed of Oxone solution and 0.005g cobalt-zinc oxide composite catalyst, 13min to 25mg·L -1 The degradation efficiency of rhodamine B dye wastewater was 94.5%.

Embodiment 3

[0016] (1) Take 2.5891g ZnCl 2 Dissolve in 30mL deionized water, and wait for complete dissolution to obtain ZnCl 2 solution; (2) Add 15g of glucose to hot ZnCl at one time 2 solution, stir while adding to make it dissolve rapidly, and obtain solution X; (3) add 0.2811g CoSO to the heated solution X at one time 4 ?7H 2 O, stir while adding, continue heating to evaporate water, and obtain a brown-black solid; (4) Put the brown-black solid in a drying oven at 100°C for 8 hours, transfer it to an evaporating dish and place it in a calcination box at 600°C for 4 hours. A cobalt-zinc oxide composite catalyst with a cobalt mass content of 5% was obtained. 0.01mol·L under normal room temperature -1 In the oxidation system composed of Oxone solution and 0.005g cobalt-zinc oxide composite catalyst, 13min to 25mg·L -1 The degradation efficiency of rhodamine B dye wastewater was 99.58%.

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Abstract

The invention provides a preparation method of a cobalt-zinc oxide composite catalyst. The preparation method comprises the following steps: (1) taking 2.5891g of ZnCl2, and dissolving ZnCl2 in 30mL of deionized water so as to obtain a ZnCl2 solution after ZnCl2 is completely dissolved; (2), adding 15g of glucose into the heated ZnCl2 solution once while stirring so as to ensure that the glucose is rapidly dissolved, thereby obtaining a solution X; (3), adding 0.2811g of CoSO4.7H2O into the heated solution X once while stirring, and further heating to evaporate the moisture, thereby obtaining a brownish black solid; and (4), drying the brownish black solid in a drying box at a temperature of 100 DEG C for 8 hours, transferring to an evaporation dish, putting the evaporation dish into a calcining box at a temperature of 600 DEG C, and calcining for 4 hours so as to obtain the cobalt-zinc oxide composite catalyst. The cobalt-zinc oxide composite catalyst is capable of efficiently catalyzing Oxone to degrade no less than 25mg.L<-1> rhdamine B wastewater under sunlight, has the advantages of high adsorption catalysis capability, stable performance, no toxicity, high efficiency, low price and the like, can be applied to degradation of organic pollutants which are difficult in biological degradation, and has relatively high market application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a preparation method of a cobalt-zinc oxide composite catalyst capable of efficiently catalyzing Oxone to degrade rhodamine B dye wastewater. Background technique [0002] Rhodamine B is a fluorescent dye based on xanthene. It is widely used in food dyeing, fluorescent labeling and dye coloring because of its non-selective tinting strength and non-fading characteristics. However, subsequent toxicological studies have shown that Rhodamine B has potential carcinogenicity and mutagenicity, and has been banned in my country as a food additive. Rhodamine B dye wastewater is also one of the typical refractory organic wastewater, and the removal effect of conventional biological treatment is not ideal. [0003] Oxone (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ) is the trade name of potassium hydrogen peroxysulfate compound salt, and its active substance is potassium hydroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80
Inventor 皮运清冯精兰孙剑辉董淑英李琦路韩笑雷玉坤贺梦洁赵扬扬高会芹
Owner HENAN NORMAL UNIV
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