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Preparation method and application of rod-like ozone catalyst Cu-OMS-2

A technology of cu-oms-2 and catalyst, which is applied in the field of water pollution control, can solve the problems of complicated ozone catalytic oxidation process, increased water treatment cost, and reduced catalyst activity, achieving low metal ion dissolution concentration and stable reuse performance , Lattice oxygen flow performance large effect

Inactive Publication Date: 2019-10-11
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the most studied heterogeneous catalysts in ozone catalytic oxidation technology mostly exist in solid form, which has the advantages of high reactivity, fast rate, easy separation, and simple process. However, some metal ions will dissolve after the reaction, resulting in a decrease in catalyst activity and Further environmental pollution requires certain follow-up treatment after the ozone catalytic oxidation reaction, which will complicate the ozone catalytic oxidation process and increase the cost of water treatment

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  • Preparation method and application of rod-like ozone catalyst Cu-OMS-2
  • Preparation method and application of rod-like ozone catalyst Cu-OMS-2
  • Preparation method and application of rod-like ozone catalyst Cu-OMS-2

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[0032] Such as figure 1 Shown, the preparation method of the embodiment of the present invention Cu-OMS-2 ozone catalyst, described method comprises the steps:

[0033] providing a first solution comprising Mn 2+ solution, CuCl 2 2H 2 O and dispersant;

[0034] providing a second solution comprising a second solvent and KMnO uniformly dispersed in the second solvent 4 powder;

[0035] uniformly drop the second solution into the first solution, stir and sonicate to obtain a mixture;

[0036] The mixture is subjected to hydrothermal reaction, and then centrifuged, dried, ground and calcined at a high temperature to obtain a Cu-OMS-2 ozone composite catalyst.

[0037] OMS-2 is a pore size of 0.46 nm, made of [MnO 6 ] Manganese oxide with a one-dimensional pore frame structure with shared edges in the octahedral chain. There are manganese ions in various valence states in its skeleton, and there are a large number of open interlayer and pore structures, which can provide a...

Embodiment 1

[0044] Preparation of Cu-OMS-2

[0045] First weigh 3.668 g of Mn(CH 3 COO) 2 with 1.277 g of CuCl 2 2H 2 O, supplemented by stirring at a speed of 500-600 r / min, so that it was completely dissolved in 35 mL of deionized water, and then 2.5 mL of acetic acid was added to adjust the pH; another 2.168 g KMnO 4 Stir fully at the same speed and completely dissolve in 40 mL deionized water; then KMnO 4 The solution was added dropwise with Mn(CH 3 COO) 2 solution; ultrasonicated for 10 min, transferred to a 100 mL autoclave, placed in an oven to synthesize at 140°C for 24 h, cooled to room temperature, taken out, centrifuged and washed several times until neutral, and then dried in an oven at 100°C for 12 h h, the obtained solid was ground, and finally put into a muffle furnace, calcined at 400 °C for 4 h at a heating rate of 4 °C / min, and then ground to obtain the desired catalyst.

[0046] The SEM photo of Cu-OMS-2 prepared by the embodiment of the present invention 1 is as...

Embodiment 2

[0050] Preparation of Cu-OMS-2

[0051] First weigh 3.668 g of Mn(CH 3 COO) 2 with 0.267 g of CuCl 2 2H 2 O, supplemented by stirring at a speed of 500-600 r / min, so that it was completely dissolved in 35 mL of deionized water, and then 2.5 mL of acetic acid was added to adjust the pH; another 2.168 g KMnO 4 Stir fully at the same speed and completely dissolve in 40 mL deionized water; then KMnO 4 The solution was added dropwise with Mn(CH 3 COO) 2 solution; ultrasonicated for 10 min, transferred to a 100 mL autoclave, placed in an oven and synthesized at 100°C for 24 h, cooled to room temperature, taken out, centrifuged and washed several times until neutral, and then dried in an oven at 100°C for 12 h h, the obtained solid was ground, and finally put into a muffle furnace, calcined at 400 °C for 4 h at a heating rate of 4 °C / min, and then ground to obtain the desired catalyst.

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Abstract

The invention provides a preparation method and application of a rod-like ozone catalyst Cu-OMS-2. The preparation method includes: providing a first solution, wherein the first solution comprises a Mn<2+> solution [such as manganese acetate (Mn(CH3COO)2), manganese chloride (MnCl2 4H2O), manganese nitrate (Mn(NO3)2) and manganese sulfate MnSO4 H2O], copper chloride dihydrate (CuCl2 2H2O) and a dispersing agent; providing a second solution, wherein the second solution comprises a second solvent and potassium permanganate (KMnO4) powder evenly dispersed in the second solvent; dropwise adding the second solution into the first solution, and stirring and performing ultrasonic treatment to obtain a mixture; placing the mixture into a high-temperature reaction kettle to perform reaction, centrifuging, drying, grinding, and calcining at high temperature to obtain the Cu-OMS02 ozone compound catalyst. Cu<2+> is doped into an OMS-2 crystal structure and then used for ozone catalysis, metal iondissolution after traditional metal catalyst reaction is lowered effectively, and catalyst activity and stability are increased.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a preparation method and application of a rod-shaped ozone catalyst Cu-OMS-2. Background technique [0002] As a strong oxidizing agent, ozone has a high oxidation-reduction potential (2.07eV) in water, which is second only to fluorine, and is not prone to secondary pollution. It is easy to use and can be prepared on-site using air. Ozone can not only oxidize and decompose toxic and harmful substances in water, and play the role of deodorization and decolorization; it can also oxidize soluble iron and manganese, and has a wide range of sterilization and disinfection capabilities. Ozone can oxidize organic matter in two ways: one is to directly react with compounds; the other is to rely on the contact of ozone with water to generate hydroxyl radicals (∙OH) with a faster reaction rate and stronger oxidative properties for indirect oxidation. Single ozon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J37/10C02F1/72C02F1/78C02F101/30
CPCB01J23/8892B01J37/10C02F1/725C02F1/78C02F2101/30
Inventor 袁向娟夏东升孙磊刘静石函鹭柯玲杰
Owner WUHAN TEXTILE UNIV
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