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Preparation method of GO/MoS2 quantum dot layered two-dimensional film

A quantum dot layer, quantum dot technology, applied in the field of membrane separation, can solve the problems of destroying GO, lattice spacing reducing membrane retention rate and stability, etc., achieving good stability and improving transmission efficiency.

Pending Publication Date: 2021-10-29
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these measures will destroy the original layered structure of GO, and at the same time, the increase of lattice spacing will reduce the rejection and stability of the membrane.

Method used

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  • Preparation method of GO/MoS2 quantum dot layered two-dimensional film
  • Preparation method of GO/MoS2 quantum dot layered two-dimensional film
  • Preparation method of GO/MoS2 quantum dot layered two-dimensional film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In Example 1, molybdenum disulfide MoS in the mixture solution 2 The mass ratio of quantum dots was 5%.

[0035] (1) Preparation of 0.01mg / ml molybdenum disulfide MoS 2 Quantum dot solution and 0.1 mg / ml graphene oxide GO solution.

[0036] (2) Add 3ml diluted molybdenum disulfide MoS to 250ml deionized water 2 The quantum dot solution and 5.7ml graphene oxide GO solution were ultrasonicated for 30 minutes to form a homogeneous mixture solution. Molybdenum disulfide MoS in the mixture solution 2 The mass ratio of quantum dots was 5%.

[0037] (3) The above mixture solution was vacuum filtered through a porous nylon base membrane with a pore size of 0.22 μm, and dried overnight at ambient temperature.

[0038] (4) Obtain molybdenum disulfide MoS 2 A layered two-dimensional film with a mass ratio of 5% quantum dots is labeled as GM-5.

Embodiment 2

[0040] The experimental operation steps and conditions are the same as in Example 1, except that the molybdenum disulfide MoS in the mixture solution 2 The mass ratio of quantum dots is 10%, that is, in step (2), the added molybdenum disulfide MoS 2 The quantum dot solution volume is 6ml, and the added graphene oxide GO solution volume is 5.4ml. Molybdenum disulfide MoS 2 The quantum dot solution is a 10% layered two-dimensional film, marked as GM-10.

Embodiment 3

[0042] The experimental operation steps and conditions are the same as in Example 1, except that the molybdenum disulfide MoS in the mixed solution is 2 The mass ratio of quantum dots is 15%, that is, in step (2), the added molybdenum disulfide MoS2 The amount of quantum dot solution is 9ml, and the amount of graphene oxide GO solution added is 5.1ml. Molybdenum disulfide MoS 2 A layered two-dimensional film with a mass ratio of quantum dots of 15% is labeled as GM-15.

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Abstract

The invention discloses a preparation method of a GO / MoS2 quantum dot layered two-dimensional film. The method comprises: (1) preparing a mixture of graphene oxide GO and MoS2 quantum dots; (2) carrying out vacuum filtration on the mixture of graphene oxide GO and MoS2 quantum dots prepared in the step (1) by using a base film to obtain a wet layered two-dimensional film; and (3) drying the wet layered two-dimensional film prepared in the step (2) to obtain the layered two-dimensional film. According to the preparation method of the GO / MoS2 quantum dot layered two-dimensional film disclosed by the invention, the prepared film is good in separation performance and high in stability.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, in particular to a GO / MoS 2 A method for preparing a quantum dot layered two-dimensional film. Background technique [0002] Organic solvents are widely used as reaction media in organic synthesis in the pharmaceutical, petroleum, and food industries. Arbitrary discharge of organic solvents will cause waste of resources and environmental pollution. Therefore, there is an urgent need to develop advanced separation techniques to purify and recover organic solvents. Several traditional liquid separation methods currently used for organic solvent recovery include absorption, extraction, and distillation. These methods have a wide range of applications, but are costly, energy-intensive, and environmentally harmful. Different from various traditional technologies, organic solvent nanofiltration (OSN) is considered as an alternative green and energy-saving process to achieve effective se...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12B01D69/14B01D71/02B01D71/56
CPCB01D71/021B01D69/141B01D67/0039B01D69/12B01D71/56
Inventor 姚晨
Owner HOHAI UNIV
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