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Preparation method of porous PbS nano sheet

A technology of nanosheets and organic molecules, which is applied in the field of preparation of porous PbS nanosheets, can solve the problems of difficult shape control and numerous steps, and achieve excellent visible light photodegradation performance, simple steps, and easy operation

Inactive Publication Date: 2010-08-18
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned preparation methods often have many steps and difficult to control the morphology.

Method used

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  • Preparation method of porous PbS nano sheet
  • Preparation method of porous PbS nano sheet
  • Preparation method of porous PbS nano sheet

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: the preparation of porous PbS nano sheet material

[0033] Add d=1.220g / ml, 19.8-39.5μL of thioglycolic acid to 15mL of 0.01M lead perchlorate aqueous solution, and immediately produce white precipitate. Adjust the pH to 8-13 with aqueous sodium hydroxide solution and hydrochloric acid. Place the prepared reaction solution in a constant temperature box at 37°C and let it stand. After a large amount of white precipitate is formed, centrifuge and wash it with secondary water for 3 times at a speed of 8000-15000 rpm to obtain lead thioglycolate with a nanosheet structure. Looks like figure 1 shown.

[0034] Move the resulting lead thioglycolate to 0.001-1 M, 500 mL of Na 2 After reacting in S aqueous solution at 37° C. for 0.1-3 h, filter and separate, and dry in a vacuum oven to obtain black powdery PbS, the microscopic appearance of the black powdery PbS is porous nanosheet.

Embodiment 2

[0035] Embodiment 2: the preparation of porous PbS nano sheet material

[0036] Add 33.0-52.8μL of mercaptopropionic acid to 15mL of 0.01M lead perchlorate aqueous solution, and a white precipitate is produced immediately. Adjust the pH to 8-13 with aqueous sodium hydroxide solution and hydrochloric acid. Put the prepared reaction solution in a constant temperature box at 37°C and let it stand. After a large amount of white precipitate is formed, centrifuge and wash it with secondary water for 3 times at a speed of 8000-15000 rpm to obtain lead mercaptopropionate with a nanosheet structure. looks like figure 2 shown.

[0037] Move the resulting lead mercaptopropionate to 0.001-1 M with 500 mL of Na 2 After reacting in S aqueous solution at 37° C. for 0.1-3 h, filter and separate, and dry in a vacuum oven to obtain black powdery PbS, the microscopic appearance of the black powdery PbS is porous nanosheet.

Embodiment 3

[0038] Embodiment 3: the preparation of porous PbS nano sheet material

[0039] Add 19.8-39.5μL of mercaptopropionic acid to 15mL of 0.01M lead perchlorate aqueous solution, and a white precipitate is produced immediately. Adjust the pH to 8-13 with aqueous sodium hydroxide solution and hydrochloric acid. Put the prepared reaction solution in a constant temperature box at 37°C and let it stand. After a large amount of white precipitate is formed, centrifuge and wash it with secondary water for 3 times at a speed of 8000-15000 rpm to obtain lead mercaptopropionate with a nanosheet structure. looks like image 3 shown.

[0040] Move the resulting lead mercaptopropionate to 0.001-1 M with 500 mL of Na 2 In S aqueous solution, react at 37°C for 0.1-3h, filter and separate, and dry in a vacuum oven to obtain black powder PbS, whose appearance is as follows: Figure 4 As shown, it is porous nanosheet.

[0041] Weigh 0.01-0.1 g of the obtained black PbS powder, place it in a 20 mL...

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Abstract

The invention provides a preparation method of a porous PbS nano sheet and a porous PbS nano material prepared by the same. The preparation method comprises the steps of reacting inorganic lead salt with an organic molecule to obtain an organic lead source; and reacting the organic lead source with a Na2S solution to obtain the porous PbS nano material, wherein the mol ratio of the inorganic lead salt to the organic molecule is 1:0.5-6; the inorganic lead salt is selected from lead perchlorate, lead chloride, lead nitrate and mixture thereof, preferably the lead perchlorate; the organic molecule is a hydrosulfuryl molecule which is selected from thioglycollic acid, mercaptopropanoic acid, 1,2-dicarboxyl-1-ethanethiol, 1-hydrosulfuryl-2-sodium sulfonate ethane and mixture thereof, preferably the thioglycollic acid or the mercaptopropanoic acid; and the mercaptopropanoic acid is 3-mercaptopropanoic acid or 2-mercaptopropanoic acid. The method has simple steps and easy operation and can effectively control the topography of the porous PbS nano material. The porous PbS nano material obtained by the method has excellent visible light degradation performance.

Description

technical field [0001] The invention relates to a preparation method of a porous semiconductor nanometer material, in particular to a preparation method of a porous PbS nanosheet. Background technique [0002] Due to the characteristics of low density, high porosity, large specific surface area and selective permeability to gas, porous materials have broad application prospects in many aspects, such as catalysis, adsorption separation and ion exchange, so they have been favored by people. General concern. Porous materials can be divided into the following three categories according to the pore size: microporous (<2nm), mesoporous (2-50nm), and macroporous (>50nm) materials. Typical microporous materials are solid materials with a crystalline network structure, including wollastonite, activated carbon and zeolite molecular sieves, etc., generally have relatively regular pores, because the pore size is too small, it is not suitable for catalysis and adsorption of organi...

Claims

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Application Information

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IPC IPC(8): C01G21/21
Inventor 周惠琼赵子钊唐智勇江雷
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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