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Semiconductor chalcogenide-containing composite semi-permeable membrane used for water evaporation by light, preparation method and purpose thereof

A chalcogenide compound, composite semipermeable membrane technology, applied in semipermeable membrane separation, chemical instruments and methods, general water supply saving, etc., can solve the problem of light-to-heat conversion efficiency of only 24%, limitation, etc., to achieve light-to-heat conversion effect Good, low cost, good application prospects

Active Publication Date: 2017-09-15
SHANGHAI MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high solar power density and high cost of materials limit the application of this technology in solar-to-thermal conversion, and its photothermal conversion efficiency is only 24%.

Method used

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  • Semiconductor chalcogenide-containing composite semi-permeable membrane used for water evaporation by light, preparation method and purpose thereof
  • Semiconductor chalcogenide-containing composite semi-permeable membrane used for water evaporation by light, preparation method and purpose thereof
  • Semiconductor chalcogenide-containing composite semi-permeable membrane used for water evaporation by light, preparation method and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 3.375 mg of CdS to 6 mL of the above-mentioned semipermeable membrane precursor solution, and stir mechanically for 15 minutes to obtain a uniformly mixed mixed solution; take out 2 mL of the mixed solution, add it to the bottom of a 500 mL beaker with a diameter of 75 mm, let it dry naturally to form a film, and cut it A semiconductor CdS-based semipermeable membrane with a content of 0.25 mg was prepared for a circular thin film with a diameter of 35 mm. The prepared semiconductor CdS-based semi-permeable membrane was placed in (0.5mol / L) silver nitrate solution and soaked for 15 minutes, and it was taken out to successfully prepare a semiconductor-containing CdS-Ag with a thickness of about 150 μm and a content of about 0.25 mg. 2 S composite semipermeable membrane.

Embodiment 2

[0036] Add 6.75mg of CdS to 6mL of the above semipermeable membrane precursor solution, and mechanically stir for 15min to obtain a uniformly mixed mixed solution; take out 2mL of the mixed solution, add it to the bottom of a 500mL beaker with a diameter of 75mm, let it dry naturally to form a film, and cut it A semiconductor CdS-based semipermeable membrane with a content of 0.5 mg was prepared for a circular thin film with a diameter of 35 mm. The prepared semiconductor CdS-based semi-permeable membrane was placed in (0.5mol / L) silver nitrate solution and soaked for 15 minutes, and it was taken out, and a semiconductor-containing CdS-Ag with a thickness of about 150 μm and a content of about 0.5 mg was successfully prepared. 2 S composite semipermeable membrane.

Embodiment 3

[0038] Add 13.5 mg of CdS to 6 mL of the above semi-permeable membrane precursor solution, and mechanically stir for 15 minutes to obtain a uniformly mixed mixed solution; take out 2 mL of the mixed solution, add it to the bottom of a 500 mL beaker with a diameter of 75 mm, let it dry naturally to form a film, and cut it A semiconductor CdS-based semipermeable membrane with a content of 1 mg was prepared as a circular thin film with a diameter of 35 mm. The prepared semiconductor CdS-based semi-permeable membrane was placed in (0.5mol / L) silver nitrate solution and soaked for 15 minutes, and it was taken out to successfully prepare a semiconductor-containing CdS-Ag with a thickness of about 150 μm and a content of about 1 mg. 2 S composite semipermeable membrane.

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PUM

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Abstract

The invention discloses a semiconductor chalcogenide-containing composite semi-permeable membrane used for water evaporation by light, a preparation method and a purpose thereof. The method comprises the following steps: 1) employing cellulose nitrate to prepare a semi-permeable membrane precursor solution; 2) adding the chalcogenide to the above precursor solution, violently stirring the materials to obtain a mixed solution; 3) spreading the above mixed solution on a container having a flat bottom, naturally drying the solution to form the membrane, and preparing the chalcogenide-containing semi-permeable membrane; 4) placing the chalcogenide-containing composite semi-permeable membrane in a silver nitrate solution for immersing for a while; and 5) taking the immersed chalcogenide-containing semi-permeable membrane out, naturally drying the material, and preparing the semiconductor chalcogenide-containing semi-permeable membrane. The method has the advantages of simple process and low cost; the provided semi-permeable membrane has good photo-thermal transition effect, and has very good application prospect in the fields of water evaporation by light and seawater desalination.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation and relates to a composite semipermeable membrane, in particular to a method for preparing a semiconductor chalcogen compound-containing composite semipermeable membrane, which is expected to be widely used in the fields of light-evaporated water and seawater desalination. Background technique [0002] As we all know, solar energy is an inexhaustible and inexhaustible natural renewable energy. It has the advantages of no pollution, high radiation power and cleanness. It is used as the energy source of solar photothermal conversion technology. Converting solar energy into heat energy is widely used in various aspects of actual production and life, such as solar power generation, seawater desalination, solar photothermal sterilization and other industrial applications. [0003] Large-scale use of solar energy can effectively reduce human dependence on fossil fuels, and can also achieve ...

Claims

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Application Information

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IPC IPC(8): B01D71/20B01D69/12B01D67/00C02F1/14C02F1/44C02F103/08
CPCB01D67/0079B01D69/12B01D71/20C02F1/14C02F1/44C02F2103/08Y02A20/124Y02A20/131Y02A20/142Y02A20/212
Inventor 陶富军张玉良施磊王斌斌李丽董丽华尹衍升
Owner SHANGHAI MARITIME UNIVERSITY
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