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Manganous-manganic oxide/ cerium oxide composite nanotube, nanotube self-assembled film, and preparation method and application thereof

A technology of trimanganese tetroxide and self-assembled membrane, which is applied in the direction of manganese oxide/manganese hydroxide, chemical instruments and methods, nanotechnology, etc., can solve the problem of few nanotube membranes, achieve excellent results, simple process flow, and easy preparation Gentle and efficient results

Active Publication Date: 2017-02-22
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Furthermore, there are some reports on the use of one-dimensional nanofiber self-deposition to form films with controllable thickness, but there are relatively few reports on the use of nanotube materials to form nanotube films through self-deposition and interweaving.

Method used

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  • Manganous-manganic oxide/ cerium oxide composite nanotube, nanotube self-assembled film, and preparation method and application thereof
  • Manganous-manganic oxide/ cerium oxide composite nanotube, nanotube self-assembled film, and preparation method and application thereof
  • Manganous-manganic oxide/ cerium oxide composite nanotube, nanotube self-assembled film, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This embodiment is the preparation of manganese oxide nanofiber template, and the specific process is as follows:

[0047] First, 10 mmol of potassium sulfate (K 2 SO 4 ), 10mmol potassium persulfate (K 2 S 2 o 8 ) and 5mmol manganese sulfate monohydrate (MnSO 4 ·H 2 O) Add to 70mL deionized water, stir magnetically until fully dissolved to form a transparent mixed solution. Then this 70mL solution was transferred to a polytetrafluoroethylene reactor with a capacity of 125mL for hydrothermal reaction. The reaction temperature was 200°C, and the reaction time was 36 hours. After the reaction was completed, it was cooled to room temperature, and the obtained brown product was dispersed into 500 mL of deionized water, and magnetically stirred for 24 hours. Finally, filter with Buchner funnel and rinse with deionized water to remove impurity ions, and dry at 60° C. for 2 days to obtain the product (manganese oxide nanofiber material).

[0048] The nanofiber obtaine...

Embodiment 2

[0050] This embodiment is the preparation of composite nanotubes of manganese tetraoxide and cerium oxide, and the specific process is as follows:

[0051] First, put 0.3g of K-OMS-2 nanofibrous material prepared in Example 1 into a beaker filled with 300mL of deionized water, then transfer to an ultrasonic device for ultrasonication for 20 minutes, and then stir magnetically until a uniform flocculent suspension is formed. until the cloudy liquid. Then add 0.6g cerium nitrate (Ce(NO 3 ) 3 ), continue stirring for 20 minutes. Then add 5g hexamethylenetetramine (C 6 h 12 N 4 ) and stirred for about 20 minutes, and then put the mixture into a water bath and stirred at 90° C. for one hour. During this reaction, hexamethylenetetramine will undergo hydrolysis to maintain the pH of the solution at around 9. After one hour, a whitish precipitate formed at the bottom of the beaker. Finally, it was filtered with a vacuum Buchner funnel, washed with deionized water several times,...

Embodiment 3

[0054] This embodiment is the preparation of composite nanotube self-forming film of trimanganese tetraoxide and cerium oxide, and the specific process is as follows:

[0055] Disperse the manganese-cerium composite nanotubes prepared in Example 2 into deionized water, and stir with magnetic force for 4 hours until the nanotubes are fully dispersed. Then, the nanotube was separated from the liquid phase through a Buchner funnel by using a vacuum filtration device, and a film layer of the composite was obtained on filter paper, and dried at 40° C. to obtain a self-supporting film material, which was reserved for use.

[0056] Figure 5 Shown is a schematic diagram of the nanotube film formation process. Figure 6 Shown is the SEM picture of the membrane surface formed by composite nanotubes, and it can be seen that the membrane is interwoven with nanotube fibers.

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Abstract

The invention discloses a manganous-manganic oxide / cerium oxide composite nanotube, a nanotube self-assembled film, and a preparation method and application thereof, which belong to the technical fields of inorganic nonmetallic materials and environment protection. A hydro-thermal synthesis technology and a redox precipitation principle are utilized for successfully designing and preparing the manganous-manganic oxide / cerium oxide composite nanotube under a moderate reaction condition, and a self-assembly interweave characteristic of the composite nanotube is further utilized for preparing the self-assembled inorganic film. A composite nanotube material has an excellent adsorption and purification capability on toxic and harmful ions in water, and a favorable catalytic purification capability on air pollutants, and particularly, the characteristics of the self-assembled film of the composite nanotube material well solve the difficult problem that a traditional water purification material is difficult to recover.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials and environmental protection, in particular to a composite nanotube of trimanganese tetraoxide / cerium oxide, a nanotube self-assembled film and its preparation method and application. The composite nanotube and self-assembled film can be It is used in the adsorption and removal of toxic and harmful ions in water, the catalytic purification of air pollutants and the loading of catalysts. Background technique [0002] One-dimensional nanomaterials are a special form of nanomaterials, because they have nanometer size in one dimension and macroscopic material properties in other directions, and because of their unique mesoscopic physical properties and nano-device preparation. It has attracted the attention of scientific researchers widely. In terms of water treatment, one-dimensional nanoscale materials can often achieve the purpose of separation and recovery through simple ...

Claims

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Application Information

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IPC IPC(8): C01G45/02C01F17/00B82Y30/00
CPCY02A50/20
Inventor 李琦尚建库孙武珠郭嵩杨炜沂
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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