Method for synthesizing near-infrared light argentic sulfide nanocrystalline coated by ligand

A synthesis method and silver sulfide technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of difficult reaction, control of nanocrystal aggregation, etc., and achieve the effect of mild reaction conditions, simple and easy method, and easy scale-up preparation

Active Publication Date: 2009-02-11
CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the traditional single-phase synthesis, which is difficult to control the reaction and the synthesize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0013] Example 1: Preparation of dodecylamine-coated silver sulfide nanocrystals

[0014] Dissolve 1.0 mmol of silver nitrate and 1.0 g of dodecylamine in 10 ml of toluene, and then add 10 ml of a prepared 0.1 mmol / ml aqueous sodium sulfide solution to the system. The temperature of the system is maintained at 40°C, and the reaction time is 30 minutes. 3.0nm.

Example Embodiment

[0015] Example 2: Preparation of oleic acid-coated silver sulfide nanocrystals:

[0016] Dissolve 1.0 mmol of silver dodecanoate and 0.5 g of oleic acid in 10 ml of toluene, and then add 10 ml of the prepared 0.1 mmol / ml sodium sulfide aqueous solution into the system. The temperature of the system is maintained at 25 °C, and the reaction time is 24 h. is 2.4nm.

Example Embodiment

[0017] Example 3: Preparation of dodecyl mercaptan-coated silver sulfide nanocrystals:

[0018] Dissolve 1.0 mmol silver nitrate and 1.0 g dodecyl mercaptan in 10 ml of toluene, and then add 10 ml of the prepared 0.1 mmol / ml sodium sulfide aqueous solution into the system, maintain the system temperature at 25 °C, and the reaction time is 12 h to obtain particles. The particle size is about 3.6 nm.

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Abstract

The invention provides a synthesis method used for silver sulfide nanocrystals of adjustable ligand-covered near infrared luminescence, comprising the steps as follows: silver source and organic coating agent are added into toluene, heated and dissolved, subsequently added into water solution of sulfur source, reacted for 10min-24h at the temperature of 25-180DEG C; the reaction is carried out under normal pressure or high-pressure kettle; the silver source and the sulfur source are reacted at two-phase interface, the forming and growing of the silver sulfide nanometer particle crystal nucleus are carried out; finally, silver sulfide nanometer crystal with narrow distribution of the near infrared luminescence is formed. The synthesis method has the advantages of mild reaction time, short preparation period, easily controlling the consistency of raw material, being simple and feasible, thus being beneficial for amplification preparation of the large scale processing and production; the prepared silver sulfide nanometer particle can be dispersed into non-polarity organic solvent. The silver sulfide nanometer crystals with adjustable near infrared luminescence and different sizes can be synthesized by adjusting the reaction time, reaction temperature, the quantity ratio and dosage of the reaction matters, and the types of the organic covering agent.

Description

technical field [0001] The invention relates to a method for synthesizing ligand-coated near-infrared luminescent silver sulfide nanocrystals. Background technique [0002] As a group I-VI semiconductor, silver sulfide not only has good semiconductor material properties, but also has visible light absorption, main infrared transmission, photoluminescence, large third-order nonlinear polarizability and fast third-order nonlinear response speed, etc. Optical properties are favored in new photocontrol devices, photocatalysis, photoelectric devices and other fields. Especially when its size is close to or smaller than the exciton Bohr radius, the resonance strength of electrons and surface phonons in nanoparticles, the intra-band migration of electrons, inter-band transitions, and thermal motion of electrons and other photophysical and photochemical properties are similar to those of bulk materials. different. Silver sulfide is a direct narrow bandgap semiconductor with good c...

Claims

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Application Information

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IPC IPC(8): C09K11/56
Inventor 刘庆辉王大鹏马晓波杨木泉聂伟张万金姬相玲
Owner CHANGZHOU INST OF ENERGY STORAGE MATERIALS &DEVICES
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