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Silver-palladium alloy nanocluster protected by 2-ethylthiophenol and preparation method for silver-palladium alloy nanocluster

A technology of ethyl thiophenol and silver palladium alloy, which is applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve the problem of harsh preparation conditions of silver nanoclusters and research on silver nanoclusters. Slow development, few types of silver-palladium alloy nanoclusters, etc., to achieve the effect of precise correlation, strong reducibility and rich variety

Active Publication Date: 2021-01-22
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the harsh preparation conditions of silver nanoclusters and the poor stability of silver nanoclusters at room temperature, the research and development of silver nanoclusters is relatively slow.
[0003] Compared with single-metal silver nanoclusters, silver-palladium alloy nanoclusters often exhibit unique physical and chemical properties, but there are fewer types of ligand-protected silver-palladium alloy nanoclusters, and the only preparation method is cumbersome. Complex problems that are not conducive to the development of research in the field

Method used

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  • Silver-palladium alloy nanocluster protected by 2-ethylthiophenol and preparation method for silver-palladium alloy nanocluster

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Silver nitrate and palladium nitrate that take silver ion and palladium ion mol ratio to be 3:1 are transferred in the single-necked round bottom flask of 250ml, then add in the methanol and the dichloromethane solution that volume ratio is 2:1, stir When the speed is 800r / min, stir for 30min to obtain a mixed solution in which the two metal salts are completely dissolved;

[0033] (2) When the stirring rate is adjusted to 400r / min, add the ligand 2-ethylthiophenol, wherein the molar ratio of the ligand to the metal silver ion is 2:1, then continue to stir for 30min, and put the reaction system The temperature is kept at -10°C;

[0034] (3) When the stirring rate is adjusted to 600r / min, the quality of sodium borohydride and the volume of deionized water are 10mg:1ml of sodium borohydride and deionized water are mixed, and added to the above steps (2 ) in the solution prepared, wherein the mol ratio of sodium borohydride and the silver ion in the solution is 1:1, a...

Embodiment 2

[0037] (1) Silver nitrate and palladium nitrate that silver ion and palladium ion molar ratio are 6:1 are transferred in the single-necked round-bottomed flask of 250ml, then add in the methanol and dichloromethane solution that volume ratio is 1:1, stir When the speed is 1000r / min, stir for 25min to obtain a mixed solution in which the two metal salts are completely dissolved;

[0038] (2) When the stirring rate is adjusted to 450r / min, add the ligand 2-ethylthiophenol, wherein the molar ratio of the ligand to the metal silver ion is 4:1, then continue to stir for 25min, and put the reaction system The temperature is kept at -5°C;

[0039] (3) When the stirring rate is adjusted to 800r / min, the quality of sodium borohydride and the volume of deionized water are 50mg: 1ml of sodium borohydride and deionized water are mixed, and added to the above steps (2 ) in the solution prepared, wherein the mol ratio of sodium borohydride and the silver ion in the solution is 6:1, and aft...

Embodiment 3

[0042] (1) Silver nitrate and palladium nitrate that take silver ion and palladium ion mol ratio are 4:1 are transferred in the single-necked round bottom flask of 250ml, then add in the methanol and dichloromethane solution that volume ratio is 1:2, stir When the speed is 1200r / min, stir for 20min to obtain a mixed solution in which the two metal salts are completely dissolved;

[0043] (2) When the stirring rate is adjusted to 900r / min, add the ligand 2-ethylthiophenol, wherein the molar ratio of the ligand to the metal silver ion is 8:1, then continue to stir for 10min, and put the reaction system The temperature is kept at 0°C;

[0044](3) When the stirring rate is adjusted to 1000r / min, the quality of sodium borohydride and the volume of deionized water are 10mg:1ml of sodium borohydride and deionized water are mixed, and added to the above steps (2 ) in the solution prepared, wherein the mol ratio of sodium borohydride and the silver ion in the solution is 1:1, and afte...

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Abstract

The invention discloses a silver-palladium alloy nanocluster protected by 2-ethylthiophenol and a preparation method for the silver-palladium alloy nanocluster and belongs to the technical field of inorganic synthetic chemistry and nanomaterial preparation. The preparation method comprises the following steps of taking silver nitrate and palladium nitrate as metal sources, taking 2-ethylthiophenolas a protective ligand, and preparing a monodisperse silver-palladium alloy nanocluster with an accurate atomic number by adopting a one-step method which is simple to operate. In the preparation method of the invention, on one hand, by adopting a one-step synthesis method simple to operate, a method of preparing the silver-palladium alloy nanocluster is simplified; and on the other hand, the protective ligand for stabilizing the silver-palladium alloy nanocluster is developed, so that the variety of the silver-palladium alloy nanocluster is enriched. The prepared silver-palladium alloy nanocluster is monodisperse, is available in raw material as well as simple in synthesis operation and separation and cleaning process, has good repeatability, broadens and enriches the variety of the silver-palladium alloy nanocluster and provides theoretical and material bases for related research and development.

Description

technical field [0001] The invention belongs to the technical field of inorganic synthetic chemistry and nanometer material preparation, and specifically relates to a silver-palladium alloy nanocluster protected by 2-ethylthiophenol and a preparation method thereof. Background technique [0002] Silver nanoclusters are aggregates formed by several to hundreds of metal atoms through physical and chemical effects, and their size is generally below 2nm and has a definite structure and composition. Due to its definite molecular structure, special optical properties, good biocompatibility and low toxicity, silver nanoclusters have potential application prospects in biosensing, cell labeling, drug delivery and other fields, which has attracted more and more attention. attention of more and more researchers. Due to the harsh preparation conditions of silver nanoclusters and the poor stability of silver nanoclusters at room temperature, the research and development of silver nanocl...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/0553B22F1/07B22F1/054B22F1/10Y02P20/55
Inventor 何丽忠贺辛亥王俊勃付翀苏晓磊徐洁王彦龙
Owner XI'AN POLYTECHNIC UNIVERSITY
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