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Method for detecting Cr (VI) in water body based on MXene/SnS2 functional composite material

A functional composite material and water body technology, applied in the direction of analysis of materials, material electrochemical variables, material analysis through electromagnetic means, etc., can solve problems such as water body environmental water body hazards, hereditary genetic defects, human health damage, etc., to achieve excellent Biocompatibility, fast analysis speed, low cost effect

Pending Publication Date: 2022-06-28
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Cr(Ⅵ) is an ingestion poison or an inhalation poison, because hexavalent chromium is easily absorbed by the human body, and it can invade the human body through digestion, respiratory tract, skin and mucous membranes, causing harm to human health, and people's skin contact is also harmful. May cause allergies; severe cases may cause inherited genetic defects
In addition, Cr(Ⅵ) mostly exists in industrial wastewater, which is also seriously harmful to the water environment and aquatic organisms.

Method used

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  • Method for detecting Cr (VI) in water body based on MXene/SnS2 functional composite material
  • Method for detecting Cr (VI) in water body based on MXene/SnS2 functional composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Step 1. (0.1wt%) MXene / SnS 2Preparation of functional composites:

[0036] Take 5mL of deionized water and 2.5mL of ethanol and mix them evenly in a beaker, then weigh 0.875g of crystalline tin tetrachloride and 0.564g of thioacetamide, respectively, and add them to the beaker of the mixed solution of water and ethanol. Ultrasonic for 10min; take 175 μL of the existing MXene aqueous solution with uniform dispersion and add it to the above mixed solution, ultrasonicate for half an hour until the dispersion is uniform; transfer the mixed dispersion to a 20mL polytetrafluoroethylene reaction kettle, at a constant temperature of 150 ℃ The heating reaction was carried out in an oven, and the temperature was kept for 2 h; after cooling to room temperature, the obtained brown-yellow powder was centrifuged, washed with deionized water and absolute ethanol for several times, and dried at constant temperature to obtain (0.1wt%) MXene / SnS 2 Functional composite material; after th...

Embodiment 2

[0040] Step 1. (0.2wt%) MXene / SnS 2 Preparation of functional composites:

[0041] Take 5mL of deionized water and 2.5mL of ethanol and mix them evenly in a beaker, then weigh 0.875g of crystalline tin tetrachloride and 0.564g of thioacetamide, respectively, and add them to the beaker of the mixed solution of water and ethanol. Ultrasound for 10 min; take 350 μL of the existing uniformly dispersed MXene aqueous solution and add it to the above mixed solution, ultrasonicate for half an hour until the dispersion is uniform; transfer the mixed dispersion to a 20 mL polytetrafluoroethylene reaction kettle, at a constant temperature of 150 ° C The heating reaction was carried out in an oven, and the temperature was kept for 2 h; after cooling to room temperature, the obtained brown-yellow powder was centrifuged, washed with deionized water and absolute ethanol for several times, and dried at constant temperature to obtain (0.2wt%) MXene / SnS 2 Functional composite material; after t...

Embodiment 3

[0045] Step 1. (0.4wt%) MXene / SnS 2 Preparation of functional composites:

[0046] Take 5mL of deionized water and 2.5mL of ethanol and mix them evenly in a beaker, then weigh 0.875g of crystalline tin tetrachloride and 0.564g of thioacetamide, respectively, and add them to the beaker of the mixed solution of water and ethanol. Ultrasonic for 10 min; take 700 μL of the existing uniformly dispersed MXene aqueous solution and add it to the above mixed solution, ultrasonicate for half an hour until the dispersion is uniform; transfer the mixed dispersion to a 20 mL polytetrafluoroethylene reaction kettle, at a constant temperature of 150 ° C The heating reaction was carried out in an oven, and the temperature was kept for 2 h; after cooling to room temperature, the obtained brown-yellow powder was centrifuged, washed with deionized water and absolute ethanol for several times, and dried at constant temperature to obtain (0.4wt%) MXene / SnS 2 Functional composite material; after t...

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Abstract

The invention belongs to the field of functional materials and photoelectric sensing, a composite material obtained by combining a two-dimensional MXene material and SnS2 is used as a photosensitizer, and the photosensitizer is used for constructing a photoelectric sensor and detecting Cr (VI) in a water body. The MXene / SnS2 functional composite material is prepared by adopting a hydrothermal method, the photoelectrochemical sensor is constructed by utilizing the MXene / SnS2 functional composite material, and the photoelectrochemical sensor is a sensing device which takes a photosensitive material as a basis and converts an optical signal into an electric signal through a signal converter and outputs the electric signal. According to the composite material, attachment sites are provided for the visible-light-responsive SnS2 nanometer material based on MXene with the large specific surface area, the MXene and the SnS2 nanometer material are combined, the accumulation problem of MXene can be avoided, the electron transfer efficiency of the SnS2 material can be improved, the composite material is applied to the field of photoelectric sensors, the concentration of Cr (VI) in wastewater can be sensitively detected, and the application prospect is wide. The sensor also has the advantages of low cost, simple operation and high sensitivity.

Description

technical field [0001] The invention belongs to the fields of nanomaterials and photoelectrochemical sensing, and relates to an MXene / SnS 2 The functional composite material was used to construct a photoelectrochemical sensor and a method for the detection of Cr(VI) in water. Background technique [0002] MXene, as an emerging 2D layered material, has been reported since 2012. 2 X, M 3 X 2 and M 4 X 3 (M is a transition metal element, such as Ti, Zr, V, Mo, and X is a C or N element) since its synthesis, its application has received extensive attention from researchers in different fields. MXene materials are composed of transition metal carbides, nitrides or carbonitrides with a thickness of several atomic layers, which are generally obtained by acid etching. At the same time, MXene material has large specific surface area and good mechanical properties due to its special elemental composition and layered structure. In addition, MXene material also has chemical stabil...

Claims

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Application Information

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IPC IPC(8): G01N27/416G01N27/30
CPCG01N27/4166G01N27/30G01N27/305
Inventor 钱静田云萌王成全王坤张琦崔海宁
Owner JIANGSU UNIV
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