Titanium carbide nanosheet/layered indium sulfide heterojunction and application of the same in degrading and removing water pollutant

A nanosheet, titanium carbide technology, applied in water pollutants, chemical/physical processes, catalyst activation/preparation, etc., can solve the problems of reduced photocatalytic activity, low photon quantum yield, and fast photogenerated carrier recombination rate, etc. To achieve the effect of uniform growth, good repeatability and large size

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

AI Technical Summary

Problems solved by technology

[0003] With the development of nanotechnology, indium sulfide (In 2 S 3 ) Nanophotocatalytic materials have become a research hotspot, however, nanoscale indium sulfide (In 2 S 3 ) still has the following problems in the actual application process: first, the photogenerated carrier recombination rate of the narrow bandgap semiconductor material is too fast, and the photon quantum yield is low; second, the nanoscale indium sulfide (In 2 S 3 ) is easy to agglomerate, greatly reducing its photocatalytic activity

Method used

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  • Titanium carbide nanosheet/layered indium sulfide heterojunction and application of the same in degrading and removing water pollutant
  • Titanium carbide nanosheet/layered indium sulfide heterojunction and application of the same in degrading and removing water pollutant
  • Titanium carbide nanosheet/layered indium sulfide heterojunction and application of the same in degrading and removing water pollutant

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Experimental program
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Effect test

Embodiment 1

[0033] Ti 3 C 2 The preparation of two-dimensional transition metal carbide nanosheets, the specific steps are as follows:

[0034] Add 0.8 g LiF to 10 ml 9 mol / L hydrochloric acid and stir for about 5 minutes, then add 0.4 g Ti within 5 minutes 3 AlC 2 , to prevent bumping. Then stirred at 25 °C for 24 h for etching, the reaction product was centrifuged and washed with water until the pH reached about 6, then deionized water was added, the layers were separated by hand shaking for 15 minutes, and centrifuged again to obtain the two-dimensional transition metal carbide Ti 3 C 2 The nanosheets are a black colloidal solution, stored in a refrigerator at 4 °C, and recorded as solution A.

[0035] attached figure 1 Ti obtained above 3 C 2 SEM image of Ti 3 C 2 MXene is a two-dimensional layered material, the thickness of nanosheets is on the order of nanometers, the plane size is on the order of micrometers, the surface defects are less, and the specific surface area is ...

Embodiment 2

[0037] Indium salt and Ti 3 C 2 The electrostatic self-assembly of nanosheets, the specific steps are as follows:

[0038] 0.8 mmol InCl 3 4H 2 O and 10 mL of deionized water were added to a 50 mL one-necked flask and stirred for 1 hour, which was recorded as solution B, and then 10 mL of solution A obtained in Example 1 was added (the quality of the two-dimensional transition metal carbide nanosheets was 1 / 2 of the mass of indium sulfide. 2%) and then stirred for 1.5 h. Indium ions adsorb on the negatively charged Ti on its surface 3 C 2 On the surface of the nanosheets, the stabilized Ti 3 C 2 The colloidal solution coagulates.

Embodiment 3

[0040] After the air was replaced with argon protective gas, the reflux reaction was carried out. The specific steps are as follows:

[0041] Add 1.2 mmol thioacetamide to the flask in Example 2. The molar ratio of indium and sulfur in the system is 2:3. After stirring for ten minutes, connect a spherical condenser and a three-way valve, and seal the interface well. First use a vacuum pump to remove the air in the flask and condenser, and then use an air bag to blow in argon. Put the above device into the oil bath, add condensed water and reflux at 95°C for 1.5h, and put it into the ice-water mixture to cool down quickly after the reflux. The cooled reaction product was centrifuged three times with a mixed solvent of water and ethanol, then centrifuged once with ethanol, and then dried in a vacuum oven to constant weight to obtain a titanium carbide nanosheet / layered indium sulfide heterojunction.

[0042] attached figure 2 It is the scanning electron microscope picture of ...

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Abstract

The invention provides a titanium carbide nanosheet / layered indium sulfide heterojunction and an application of the same in degrading and removing a water pollutant. A simple electrostatic self-assembly method is used to uniformly absorb indium ions on the surfaces of Ti3C2 nanosheets, which effectively inhibits the stacking of the nanosheets and is beneficial to the uniform growth of In2S3 nanosheets on the surfaces of the Ti3C2. The titanium carbide nanosheet / layered indium sulfide heterojunction overcomes two disadvantages of too fast photogenerated carrier recombination rate of In2S3 and easy agglomeration of nanometer In2S3, and effectively improves the separation efficiency and photocatalytic activity of photogenerated electron-hole of In2S3.

Description

technical field [0001] The invention relates to the technical field of inorganic nanocomposite materials, in particular to the preparation of titanium carbide nanosheet / layered indium sulfide heterojunction and its photocatalytic degradation and removal of water body pollutants. Background technique [0002] Environmental and energy issues are two major problems faced by human beings in the 21st century. Among them, the utilization of solar energy and the control of environmental pollution are important issues facing human beings. Hexavalent chromium is a common heavy metal pollutant with high toxicity and bioaccumulation, posing a threat to human health. Trivalent chromium is one of the trace elements needed by living organisms. Through certain oxidation-reduction reactions, hexavalent chromium and trivalent chromium can be converted into each other. How to use the power of nature, the sun, to solve the problem of environmental pollution has become a hot spot of concern. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J35/02B01J35/10B01J37/00C02F1/30C02F1/70C02F101/22
CPCB01J27/22B01J35/004B01J35/023B01J35/1004B01J37/0009B01J37/00C02F1/30C02F1/70C02F2305/10C02F2101/22B01J27/04B01J35/0013B01J37/0217B01J37/0219B01J35/002
Inventor 路建美李娜君
Owner SUZHOU UNIV
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