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SBA-15 loaded iron-cobalt oxide catalyst, preparation method and application thereof in wastewater treatment

A technology of oxides and catalysts, which is applied in the field of SBA-15 supported metal oxide catalysts, can solve problems such as catalyst deactivation, and achieve the effects of low metal ion dissolution, high catalytic activity, and simple preparation methods

Inactive Publication Date: 2013-10-23
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the main defect of heterogeneous catalysis is that the active surface of the catalyst will be gradually passivated, which will eventually lead to the deactivation of the c...

Method used

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  • SBA-15 loaded iron-cobalt oxide catalyst, preparation method and application thereof in wastewater treatment
  • SBA-15 loaded iron-cobalt oxide catalyst, preparation method and application thereof in wastewater treatment
  • SBA-15 loaded iron-cobalt oxide catalyst, preparation method and application thereof in wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of SBA-15: Dissolve 12 g of triblock copolymer P123 in 360 g of deionized water, add 15.6 mL of 37% (mass concentration) HCl, control the solution temperature between 35 and 38 °C, and wait for triblock copolymer P123 After stirring and dissolving, 15.5mL TEOS was added dropwise, stirred at a solution temperature of 38°C for 24 hours, then the obtained sample was placed in an autoclave, and the autoclave was placed in an oven at a temperature of 100°C for 24 hours. After the autoclave was cooled, the solid sample was obtained by suction filtration, dried at 80°C for 12 hours, and the obtained solid was calcined at 550°C for 4 hours (the heating program was 1°C / min) to obtain SBA-15.

[0032] Preparation of SBA-15 loaded iron oxide (5% iron oxide loading):

[0033] Preparation of SBA-15 loaded iron oxide (the iron oxide load is 5%): add 0.12g aminoacetic acid to the salt solution containing 0.25g ferric nitrate nonahydrate, stir and mix; add 1g SBA-15, stir a...

Embodiment 2

[0045] Ultrasonic / heterogeneous activation of persulfate system: add 0.2g of persulfate (2KHSO 5 ·KHSO 4 ·K 2 SO 4 ), then add the SBA-15 loaded iron oxide (the iron oxide loading is 5%), the SBA-15 loaded cobalt oxide (the cobalt oxide loading is 5%), the SBA-15 loaded iron oxide in Example 1 Iron cobalt oxide 0.1g (the load of iron cobalt oxide is 5%, Fe:Co=1:1), ultrasonic power 200W, reaction at room temperature for 120min, after passing through a 0.22μm filter membrane, measure the absorbance, and measure three kinds The results of the catalyst's removal rate of orange II and the dissolution rate of metal ions in the solution after the reaction are shown in Table 1 and Table 2.

[0046] Table 1 The decolorization effect of different catalysts on orange Ⅱ under ultrasonic conditions

[0047]

[0048] Table 2 The dissolution rate of metal ions of different catalysts under ultrasonic conditions

[0049]

[0050] It can be seen from Table 1 that after 120 minutes o...

Embodiment 1）

[0052] Under the condition of Fe:Co=1:1, the SBA-15 supported iron-cobalt oxide catalyst with 5% iron-cobalt oxide content, 10% iron-cobalt oxide content and 20% iron-cobalt oxide content (three kinds of catalysts were prepared) See Example 1 for details of the preparation, according to Example 2, the removal rate of orange II by SBA-15 loaded iron cobalt oxide catalyst under ultrasonic / heterogeneous activation of persulfate system was determined, and the results are shown in Table 3 .

[0053] Table 3 The decolorization effect of catalysts with different metal oxide loadings on orange Ⅱ under ultrasonic conditions

[0054]

[0055] It can be seen from the above table that after 120 minutes of reaction, the removal effects of SBA-15 loaded iron-cobalt oxide 5%, 10%, and 20% catalysts (Fe:Co=1:1) on orange II were 82.8%, 95.3%, and 97.9%, respectively. %, a higher removal rate can be obtained.

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Abstract

The invention discloses an SBA-15 loaded iron-cobalt oxide catalyst, a preparation method and an application thereof in wastewater treatment. The SBA-15 loaded iron-cobalt oxide catalyst comprises 80.0-95.0% of SBA-15 and 5.0-20.0% of iron cobalt oxide, wherein a molar ratio of iron to cobalt in the iron-cobalt oxide is 1:1 to 4:1. The SBA-15 loaded iron-cobalt oxide catalyst is obtained by adding aminoacetic acid into a salt solution containing ferric nitrate and cobalt nitrate, stirring uniformly, then adding SBA-15; stirring for 22-26 hours; heating to a temperature of 280-300 DEG C to carry out a combustion reaction; drying a combustion product and transferring the combustion product into a muffle furnace for calcinations. The catalyst can be used for treating printing and dyeing wastewater. The catalyst provided by the invention is simple in preparation method and low in cost, and has high catalytic activity, low dissolution of metal ions and good stability. The catalyst is mild in reaction conditions and good in treating effect for treating the wastewater.

Description

technical field [0001] The invention relates to an SBA-15 loaded metal oxide catalyst, in particular to an SBA-15 loaded iron-cobalt oxide catalyst, its preparation method and its application in wastewater treatment. Background technique [0002] Organic wastewater is a kind of wastewater that is difficult to degrade. Among them, printing and dyeing wastewater has a large amount of discharge, high content of organic pollutants, complex types, and great harm to the environment, which has attracted widespread attention. Due to the stable chemical structure, high toxicity and high difficulty of treatment of organic pollutants in printing and dyeing wastewater, it is difficult to achieve satisfactory results by applying conventional water treatment technologies, such as physical methods, chemical methods, physical chemical methods and biological methods and their combinations. processing effect. These traditional water treatment technologies have been seriously challenged, so ...

Claims

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Application Information

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IPC IPC(8): B01J29/03C02F9/04C02F9/08
Inventor 张晖蔡纯钟欣
Owner WUHAN UNIV
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