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Preparation method of magnetic element-doped CdS nanorods

A magnetic element and element doping technology, applied in chemical instruments and methods, single crystal growth, polycrystalline material growth, etc., can solve the problem of harsh reaction conditions, complex preparation, product morphology and optical properties of magnetic element doped CdS nanorods. The properties are difficult to control and other problems, and achieve the effect of easy separation and purification, simple method and low cost

Inactive Publication Date: 2011-03-30
NORTHEAST FORESTRY UNIVERSITY
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Problems solved by technology

[0005] The invention provides a preparation method for magnetic elements (Co, Mn) doped CdS nanorods, using cadmium-containing sulfur inorganic molecular clusters ((Me 4 N) 4 [S 4 CD 10 (SPh) 16 ]) and the precursors of magnetic elements are directly synthesized by pyrolysis in a high-boiling point solvent, which solves the problems of harsh reaction conditions, special equipment, complicated preparation, and difficulty in controlling the morphology and optical properties of the product.

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  • Preparation method of magnetic element-doped CdS nanorods
  • Preparation method of magnetic element-doped CdS nanorods
  • Preparation method of magnetic element-doped CdS nanorods

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specific Embodiment approach 1

[0018] Specific embodiment 1: In this embodiment, magnetic element Co doped CdS nanorods are prepared according to the following steps:

[0019] 1. Degas the high boiling point solvent in vacuum at 120°C for 2 hours, then lower the temperature to 60±3°C, and heat to reflux under an argon atmosphere. Add at 100°C (Me 4 N) 4 [S 4 Cd 10 (SPh) 16 ] powder, add (Me 4 N) 2 [Co 4 (SC 6 h 5 ) 10 ] powder, the system is black and turbid; 2. Continue heating at a heating rate of 1.0°C / min to 200°C-280°C and keep it warm for 0.5-1 hour, then naturally cool to 60°C, and add anhydrous methanol for precipitation and centrifugation , The obtained solid phase is precipitated and centrifuged twice with anhydrous methanol again; 3, the solid phase obtained in step 2 is dissolved in toluene, then added with anhydrous methanol for centrifugation, and then vacuum-dried to obtain the CdS covered by the high boiling point solvent surface: Co nanorod powder; four, carry out surface ligand ...

specific Embodiment approach 2

[0028] Embodiment 2: The difference between this embodiment and Embodiment 1 is that a magnetic stirrer is used for high-speed stirring during the heating and reflux process, and the rotational speed of the magnetic stirring is 140-180 r / min. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0029] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume of anhydrous methanol added in Step 3 is 1 to 2 times the volume of toluene. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The preparation method of magnetic element-doped CdS nanorods of the invention relates to a preparation method of magnetic element-doped CdS nanorods. The preparation method solves the problems that the reaction conditions of magnetic element-doped CdS nanorods are harsh, special equipments are required, the preparation process is complicated, the shape and optcial property of the product are hard to control, etc. The preparation method comprises the following steps: 1) adding inorganic molecular clusters containing Cd and S and the precursor of magnetic element in high boiling point solvent; 2) performing pyrolysis synthesis, precipitating and centrifuging; 3) purifying, performing vacuum drying; and 4) using pyridine to perform surface ligand exchange. The method can be used to prepare magnetic element-doped CdS nanorods.

Description

technical field [0001] The invention relates to a preparation method of magnetic element doped CdS nanorods. Background technique [0002] In recent years, II-VI semiconductor nanorods have attracted great interest both from the perspective of fundamental research and practical applications due to their excellent optical properties. As an important II-VI semiconductor material, CdS nanorods have potential wide applications in light-emitting diodes (LEDs), solar cells, nonlinear optical devices, and photocatalysis. Due to magnetic ions (such as Mn 2+ 、Co 2+ ) has a strong local spin magnetic moment, and there is a strong spin-spin exchange interaction between the local magnetic moment of the magnetic ion and the valence band electrons, so that the magnetic ion doped semiconductor nanorod has a series of The completely different characteristics of ordinary semiconductors, such as the giant Faraday effect, large exciton splitting, giant Zeeman splitting, etc., exhibit strang...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/50
Inventor 李志国蔡伟李晓丽
Owner NORTHEAST FORESTRY UNIVERSITY