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Preparation method of manganese oxide-carbon nano fibrous composite catalytic membrane

A technology of carbon nanofibers and catalytic membranes, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve strong controllability, improve ozone utilization rate, and excellent catalysis The effect of ozone oxidation effect

Inactive Publication Date: 2017-11-28
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, in the existing research, the manganese oxide / carbon nanocomposite fiber membrane is mostly used as the research content of the electrochemical direction, but the preparation of the composite fiber catalytic membrane by this method is rarely reported.

Method used

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  • Preparation method of manganese oxide-carbon nano fibrous composite catalytic membrane
  • Preparation method of manganese oxide-carbon nano fibrous composite catalytic membrane
  • Preparation method of manganese oxide-carbon nano fibrous composite catalytic membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A MnO 2 Preparation method of / CNF composite catalytic membrane:

[0033] Step 1: Configuration of the casting solution

[0034] 4.8 g of polyacrylonitrile (PAN) was weighed and dispersed in 55.2 g of DMF, and stirred uniformly at room temperature. Then, 10wt%, 20wt% and 30wt% of PAN manganese acetate tetrahydrate were respectively added in the continuous stirring process, fully stirred to a dark red homogeneous film casting solution, and left to stand for defoaming.

[0035] Step 2: Mn(oAc) 2 Preparation of / PAN nanofiber composite membrane

[0036] The casting solution obtained in step 1 was injected into the electrospinning equipment, the spinning voltage was 16kv, the distance between the spinneret and the negative receiver was 15cm, the spinning solution pushing rate was 1.0ml / min, and the spinning temperature was 30 ℃, through the action of high-voltage electric field, the film was formed by jet spinning, and Mn(oAc) was obtained after drying at 50 ℃ for 12 ho...

Embodiment 2

[0042] The casting solution was prepared by adding 4.8g of polyacrylonitrile (PAN) and 55.2g of DMF into a stirring tank, mixing and stirring thoroughly, setting the temperature at 20°C, and stirring for 6 hours to obtain a uniform polymer casting solution. Add 30wt% PAN manganese acetate tetrahydrate to the continuously stirred polymer casting solution, set the temperature at 20° C., stir for 4 hours to obtain a homogeneous dark red transparent casting solution, and let stand for defoaming.

[0043] Spinning to form a film, inject the casting solution prepared in step 1 into the electrospinning spinning propeller, set the spinning propulsion rate to 0.6ml / min, the spinning voltage to 16kv, and the distance between the spinneret and the negative electrode receiver to be 15cm, the spinning temperature is 30°C, through the action of high-voltage electric field, jet spinning to form a film, set the oven temperature to 50°C, and dry for 12h to obtain Mn(oAc) 2 / PAN nanofiber compo...

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Abstract

The invention discloses a preparation method of a manganese oxide-carbon nano fibrous composite catalytic membrane. The preparation method comprises the following steps of A, preparation of casting membrane solution, mixing 8wt% to 15wt% of polymer and 85wt% to 92wt% of organic solvent, sufficiently agitating at normal temperature, so that a uniform polymer casting membrane solution is obtained; in a continuous agitation process, adding manganese acetate tetrahydrates with different masses, sufficiently agitating to obtain a dark-red homogeneous casting membrane solution, and de-aerating for later use; B, spinning of a fibrous membrane: injecting the casting membrane solution into an electrostatic spinning propeller, and spraying a liquid drop to be a filament under the action of a high-voltage electric field, so that a Mn(oAc)2 / polymer nano fibrous composite membrane is formed; C, carbonization of the composite membrane: subjecting the fibrous composite membrane to pre-oxidation in air, and then entering an inert-gas protective medium to carry out high-temperature carbonization, so that the manganese oxide-carbon nano fibrous composite catalytic membrane is formed.

Description

technical field [0001] The invention relates to the field of catalytic ozone oxidation, in particular to a preparation method of a manganese oxide carbon nanofiber composite catalytic membrane. Background technique [0002] With the increasingly prominent environmental problems and water resources problems, the severity of wastewater discharge has become increasingly prominent, and most of the wastewater has complex components, causing varying degrees of harm to the environment, human health and ecology. Some refractory organic substances have the characteristics of poor biodegradability, and it is difficult to completely mineralize and degrade them by traditional biochemical treatment, while Advanced Oxidation Process (AOPs) can directly mineralize them or increase the pollutants through oxidation. Biodegradability. Experimental studies have shown that the advanced oxidation method can completely mineralize most of the refractory organic matter, which has a good applicatio...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01J35/06B01J37/34B01J37/08C02F1/72C02F1/78C02F101/34C02F101/36C02F101/38
CPCC02F1/725C02F1/78B01J23/34B01J37/082B01J37/342C02F2101/345C02F2101/36C02F2101/34C02F2101/38B01J35/23B01J35/58
Inventor 王军丁邮张勇侯得印曹爱新
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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