Preparation method of polycrystalline SnSe-based composite material with controllable growth of crystal grains
The invention discloses a preparation method of a polycrystalline SnSe-based composite material with controllable growth of crystal grains, which comprises the following steps of: respectively using Se powder and SnCl2. 2H2O as an anion precursor and a cation precursor, regulating the pH value of a cation solution by using sodium hydroxide to obtain a tin source precursor, reducing Se powder by using sodium borohydride to obtain a selenium source precursor, and drying to obtain the polycrystalline SnSe-based composite material with controllable growth of the crystal grains. The preparation method comprises the following steps: reacting a tin source precursor and a selenium source precursor in a heated and boiled aqueous solution, and then centrifugally washing to obtain a polycrystalline SnSe nanocrystalline matrix; the preparation method comprises the following steps: carrying out surface modification on polycrystalline substrate SnSe nanocrystals by using chalcogenide molecular ligands to obtain SnSe nanocrystal and molecular ligand powder with a molecular ligand coating on the surface, and carrying out annealing and sintering densification treatment to prepare the polycrystalline SnSe-based composite material with controllable growth of crystal grains. According to the method, the grain growth size of the finally prepared material can be simply, conveniently and effectively regulated and controlled, and the method is simple in preparation process, low in energy consumption, high in yield and suitable for large-scale rapid synthesis, thereby having a very good practical application prospect..
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Patent| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Europäisches Patentamt - (2023) vom: 15. Dez. Zur Gesamtaufnahme - year:2023 |
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| Sprache: |
Englisch |
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| Beteiligte Personen: |
LIU YU [VerfasserIn] |
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| Links: |
Volltext [kostenfrei] |
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| Themen: |
Sonstige Themen: |
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| Anmerkungen: |
Source: www.epo.org (no modifications made), First posted: 2023-12-15, Last update posted on www.tib.eu: 2024-03-13, Last updated: 2024-03-22 |
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| Patentnummer: |
CN117241647 |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
EPA000651907 |
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| 245 | 1 | 0 | |a Preparation method of polycrystalline SnSe-based composite material with controllable growth of crystal grains |
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| 520 | |a The invention discloses a preparation method of a polycrystalline SnSe-based composite material with controllable growth of crystal grains, which comprises the following steps of: respectively using Se powder and SnCl2. 2H2O as an anion precursor and a cation precursor, regulating the pH value of a cation solution by using sodium hydroxide to obtain a tin source precursor, reducing Se powder by using sodium borohydride to obtain a selenium source precursor, and drying to obtain the polycrystalline SnSe-based composite material with controllable growth of the crystal grains. The preparation method comprises the following steps: reacting a tin source precursor and a selenium source precursor in a heated and boiled aqueous solution, and then centrifugally washing to obtain a polycrystalline SnSe nanocrystalline matrix; the preparation method comprises the following steps: carrying out surface modification on polycrystalline substrate SnSe nanocrystals by using chalcogenide molecular ligands to obtain SnSe nanocrystal and molecular ligand powder with a molecular ligand coating on the surface, and carrying out annealing and sintering densification treatment to prepare the polycrystalline SnSe-based composite material with controllable growth of crystal grains. According to the method, the grain growth size of the finally prepared material can be simply, conveniently and effectively regulated and controlled, and the method is simple in preparation process, low in energy consumption, high in yield and suitable for large-scale rapid synthesis, thereby having a very good practical application prospect. | ||
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