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A method for measuring the concentration of two-dimensional nanomaterials in a two-dimensional material suspension solution

A technology of two-dimensional nanomaterials and suspending solutions, which is applied in the field of measuring the concentration of two-dimensional materials in two-dimensional material suspensions, can solve the problems of waste of preparation cost and complicated operation, and achieves the advantages of avoiding waste, simple operation and accurate characterization of concentration. Effect

Active Publication Date: 2019-07-23
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Some researchers also measure the concentration of materials by directly evaporating a certain volume of solution to dryness and then measuring the mass of the solute. However, this method is relatively cumbersome to operate, and it will cause unnecessary waste for some materials with high preparation costs.

Method used

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  • A method for measuring the concentration of two-dimensional nanomaterials in a two-dimensional material suspension solution
  • A method for measuring the concentration of two-dimensional nanomaterials in a two-dimensional material suspension solution
  • A method for measuring the concentration of two-dimensional nanomaterials in a two-dimensional material suspension solution

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Embodiment 1

[0031] Adopt the method of the present invention, select the MoS2 solution that concentration is 0.75mg / ml, measure the concentration of this concentration solution again, verify whether this inventive method is accurate.

[0032] (1) Prepare a MoS2 suspension solution with a concentration of 1.25 mg / ml by a discrete method;

[0033] (2) The MoS2 suspension solution prepared in step (1) was used to prepare 15 MoS2 suspension solutions with different concentrations. The original concentration of the two-dimensional nanomaterial solution was 1.25 mg / ml, and the concentration of the obtained MoS2 suspension solution changed from the original concentration to 1 / 28 to 1 / 1 of;

[0034] (3) Conduct spatial self-phase modulation experiments (SSPM experiments) on the molybdenum disulfide suspension solutions of various concentrations prepared in step (2), measure SSPM data, and record the radius of each diffraction ring.

[0035] The spatial self-phase modulation experiment includes t...

Embodiment 2

[0039] Using the method of the present invention, the material in Example 1 is replaced with black phosphorus. Operations not described in this embodiment are the same as in embodiment 1.

[0040] (1) A black phosphorus solution with a concentration of 1.25 mg / ml was prepared by a discrete method;

[0041] (2) The black phosphorus solution prepared in step (1) was used to prepare 15 black phosphorus suspension solutions with different concentrations. The original concentration of the two-dimensional nanomaterial solution was 1.25 mg / ml, and the concentration of the obtained black phosphorus suspension solution was taken as From 1 / 28 to 1 / 1 of the original concentration;

[0042] (3) Conduct a spatial self-phase modulation experiment (SSPM experiment) on the black phosphorus suspension solutions of various concentrations prepared in step (2), and record the spatial self-phase modulation (SSPM) image radius.

[0043] The spatial self-phase modulation experiment includes the fo...

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Abstract

A method for measuring the concentration of a two-dimensional nanomaterial in a two-dimensional material suspension solution comprises following steps: (1), preparing a two-dimensional material solution with the concentration being 1-1.5 mg / ml with a discrete method; (2), adopting the two-dimensional material solution prepared in the step (1) for preparing the two-dimensional material suspension solutions with different concentrations; (3), performing a spatial self-phase-modulation experiment on the two-dimensional material suspension solutions with different concentrations prepared in the step (2), and recording radii of spatial self-phase-modulation images; (4), acquiring an empirical formula through curve fitting in combination with the radius of a diffraction ring; (5), measuring the concentration of the two-dimensional material solution with unknown concentration on the basis of the empirical formula obtained in the step (4). With the adoption of the method, the absorption coefficient of resonance absorption is not influenced by a large-wavelength scattering effect so as to be the most accurate when used for characterizing the concentration, the operation is simple, and the material waste can be avoided.

Description

technical field [0001] The invention belongs to the field of solution concentration measurement, and in particular relates to a method for measuring the concentration of two-dimensional materials in suspensions of two-dimensional materials such as molybdenum disulfide. In particular, it relates to a method that can accurately and efficiently measure the concentration of a two-dimensional material suspension solution in a mixed solution, so as to realize micro-region concentration monitoring during the centrifugation process of the suspension solution. Background technique [0002] In recent years, the research on the preparation of two-dimensional materials by the discrete method has been quite in-depth. In 2013, O’Neill et al. used the discrete method to prepare a high-concentration and large-sized molybdenum disulfide solution. However, for the measurement of the concentration of the nanomaterial suspension solution prepared by this method, its means of realization are ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31G01N1/38
CPCG01N1/38G01N21/3103
Inventor 肖思黎彩燕刘润恺吕博赛何军杨英
Owner CENT SOUTH UNIV
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