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Graphene oxide/methylene blue composite film and preparation method thereof

A methylene blue and composite membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as shedding, unstable GO membrane, and low rejection rate of graphene oxide membrane

Active Publication Date: 2019-02-05
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

Although GO membrane has many advantages in application, GO membrane is unstable in water, and it is easy to fall off from the base membrane during the separation process; in addition, graphene oxide membrane has a relatively low rejection rate for salt and dye

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  • Graphene oxide/methylene blue composite film and preparation method thereof

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Embodiment 1～3

[0018] A preparation method of graphene oxide / methylene blue composite film, comprising the steps of:

[0019] Take 0.005g sheet-layer graphene oxide and put it into a mortar, add 1mL of pure water dropwise and grind for 5min, transfer it to a 500mL round-bottomed flask, dilute to 300mL with pure water, and mechanically stir at 20°C for 3.5h, then sonicate to After complete dispersion, it is sealed and stored in a low temperature room to obtain a uniformly dispersed graphene oxide aqueous solution;

[0020] Add different amounts of methylene blue powder to the graphene oxide aqueous solution, and magnetically stir for 24 hours to obtain a film-forming solution;

[0021] Pre-lay the mixed cellulose microfiltration membrane in the sand core funnel as the base membrane, vacuum filter 100mL of the membrane-making solution under the condition of -0.1Mpa to form a membrane, and then dry it at room temperature for 2 days to obtain the graphene oxide / methylene blue composite membrane ...

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Abstract

The invention discloses a graphene oxide / methylene blue composite film and a preparation method thereof. The graphene oxide / methylene blue composite film is composed of a base film and a filtering layer attached to the base film, wherein the main components of the filtering layer are graphene oxide and methylene blue. The preparation method comprises the following steps: adding graphene oxide to pure water, grinding the graphene oxide until particles are dispersed uniformly, adding pure water under a stirring condition to dilute the product to 5-20mu g / mL, and performing continuous stirring; then performing ultrasonic treatment for 1-30min at 200-600w; adding methylene blue to be stirred and mixed uniformly to obtain a film forming solution; adding a proper amount of film forming solutionto a sand core funnel, wherein the base film is paved in the sand core funnel in advance; and performing vacuum suction filtration and drying to obtain the graphene oxide / methylene blue composite film. The preparation method is simple, efficient, low in cost and high in repeatability; and the obtained product can greatly increase the interception rate of dyes.

Description

technical field [0001] The invention relates to the field of membrane technology, in particular to a graphene oxide / methylene blue composite membrane and a preparation method thereof. Background technique [0002] Graphene, a carbon-based material, is made of sp 2 One-atom-thick two-dimensional layered materials composed of hybridized carbon atoms. Graphene oxide (GO for short) is one of its main derivatives, which has a two-dimensional planar structure similar to graphene. Due to the abundant oxygen-containing functional groups on the surface of GO, the GO membrane has good permeability. Although GO membrane has many advantages in application, GO membrane is unstable in water and is easy to fall off from the base membrane during the separation process; in addition, graphene oxide membrane has a relatively low rejection rate for salt and dye. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D61/14C02F1/44C02F101/30
CPCB01D61/147B01D67/0088B01D69/12B01J20/20B01J20/22B01J20/28033C02F1/28C02F1/283C02F1/285C02F1/444C02F2101/308C02F2101/34C02F2101/38
Inventor 陈英波侯敬珂
Owner TIANJIN POLYTECHNIC UNIV
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