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Composite multi-layer network film based on sodium titanate nano wire and cobaltosic oxide nanoneedle, as well as preparation method and application thereof

A nano- and multi-layer network technology of cobalt trioxide, applied in chemical instruments and methods, separation methods, membranes, etc., can solve the problems of poor separation efficiency and permeation flux, and achieve low cost, good reusability, and ultra-high cycle efficiency Effect

Active Publication Date: 2018-12-21
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the separation efficiency and permeation flux of existing products are poor

Method used

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  • Composite multi-layer network film based on sodium titanate nano wire and cobaltosic oxide nanoneedle, as well as preparation method and application thereof
  • Composite multi-layer network film based on sodium titanate nano wire and cobaltosic oxide nanoneedle, as well as preparation method and application thereof
  • Composite multi-layer network film based on sodium titanate nano wire and cobaltosic oxide nanoneedle, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment one: the preparation of cobalt trioxide nano-needle net, concrete steps are as follows:

[0042] The stainless steel mesh (6 × 6 cm 2 ) were sonicated with acetone, ethanol, and 1 M HCl solution for 10 min and washed with deionized (DI) water, and then the stainless steel mesh was dried under vacuum. Take 0.58 g of Co (NO 3 ) 2 ·6H 2 O, 0.3 g NH 4 F and 0.6 g of urea were dissolved in 40 ml of deionized water, and magnetically stirred for 10 minutes to obtain a cobalamin mixture.

[0043] Place the cleaned stainless steel mesh vertically in the center of the 50 ml reaction kettle. The cobalamin mixture was poured into the autoclave. The autoclave was then heated to 120°C for 9 hours. After the reaction, the obtained pink mesh was taken out from the autoclave, rinsed with deionized water and ethanol, and dried naturally. Finally, the pink mesh was calcined in a muffle furnace at 400°C for 4 hours, and the mesh turned from pink to black.

[0044] attache...

Embodiment 2

[0045] Embodiment two: the preparation of ultra-long sodium titanate nanowires, the specific steps are as follows:

[0046] Dissolve 16 g NaOH in 40 mL DI water, and dissolve 0.27 g nano-TiO 2 (P25) Disperse the powder in NaOH solution and continue to stir for 20 minutes; then pour the uniformly dispersed solution into a 50mL autoclave. Then put it into a silicone oil bath at 130° C. and keep stirring for 24 hours. After the reaction, the autoclave was cooled to room temperature under continuous stirring. The finally obtained nanowires were washed with deionized water until the pH was 7, and sodium titanate nanowires in deionized water were obtained by centrifugation. Store the sodium titanate nanowires in 150 mL of deionized water.

[0047] attached figure 2 It is a scanning electron microscope picture of sodium titanate nanowires. The length, thickness and distribution of the nanowires can be seen from the picture. These nanowires are interwoven to form a three-dimensio...

Embodiment 3

[0048] Embodiment three: The preparation of the composite multilayer network film based on sodium titanate nanowire and cobalt tetraoxide nanoneedle, concrete steps are as follows:

[0049] Fix the cobalt tetraoxide nanoneedle net on the sand core filter device. Take 3mL sodium titanate nanowire stock solution and evenly disperse in 300ml deionized water. Vacuum filter the homogeneously dispersed nanowire aqueous solution onto the surface of the cobalt trioxide nanoneedle mesh. The composite membrane (diameter: 4 cm) was then washed several times with deionized water. The film was dried in a vacuum desiccator at 60° C. to obtain a composite multilayer network film based on sodium titanate nanowires and cobalt tetraoxide nanoneedles.

[0050] attached image 3 It is the SEM picture of the above-mentioned multilayer network composite film. The surface morphology and multi-layer distribution of the composite film can be seen through the picture. In figure a, it can be seen tha...

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Abstract

The invention relates to a composite multi-layer network film based on a sodium titanate nano wire and a cobaltosic oxide nanoneedle, as well as a preparation method and application thereof. The preparation method comprises the steps of carrying out heating reaction on a clean stainless steel wire and cobalamin mixed liquor, washing, drying, and calcining to obtain a cobaltosic oxide nanoneedle net; dispersing titanium dioxide into water containing sodium hydroxide, washing after reaction so as to obtain the sodium titanate nano wire; fixing the cobaltosic oxide nanoneedle net onto a sand corefiltering device; vacuum filtrating a water dispersion liquid of the sodium titanate nano wire to the surface of the cobaltosic oxide nanoneedle net, washing and drying, and thus obtaining the composite multi-layer network film based on the sodium titanate nano wire and the cobaltosic oxide nanoneedle; passing oil-polluted water or an oil-in-water emulsion through the composite multi-layer network film based on the sodium titanate nano wire and the cobaltosic oxide nanoneedle, and treating the oil-polluted water or separating the oil-in-water emulsion. The composite material capable of high-efficiently separating the oil-polluted water is prepared, and has high emulsion separating efficiency and good reusability.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to the preparation of a multi-layer network film material with special wettability and extremely low adhesion properties, and the efficient separation of oil stains and oil-in-water emulsions, in particular to sodium titanate-based Composite multi-layer network film of nanowire and cobalt tetraoxide nanoneedle and its preparation method and application. Background technique [0002] Due to the frequent occurrence of pollution from industrial wastewater and oil spills worldwide, it has long-term and severe environmental impacts on marine and lake ecosystems, while having a large economic impact. However, superwetting membranes have made significant progress in oil-water separation, which can help to solve the global industrial wastewater pollution and marine oil spills. However, the separation efficiency and permeation flux of existing products are relativel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/12B01D69/02B01D67/00C02F1/40
CPCB01D67/0039B01D69/02B01D69/12B01D71/024B01D2325/36C02F1/40
Inventor 路建美陈冬赟
Owner SUZHOU UNIV
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