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Method for preparing silver chloride sol and silver sol from AgCl powder

A silver chloride, silver sol technology, applied in silver halide and other directions, can solve the problems of troublesome process, many reagents, low AgCl powder processing ability, etc., and achieve the effect of simple operation procedure and easy preparation

Inactive Publication Date: 2009-07-08
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this method involves surfactants and auxiliary surfactants, which are continuous and equal, and require more reagents, so the process is relatively troublesome.
Also, due to the limitation of AgCl dissolving ability in microemulsion, the handling capacity of AgCl powder in this method is relatively low

Method used

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  • Method for preparing silver chloride sol and silver sol from AgCl powder
  • Method for preparing silver chloride sol and silver sol from AgCl powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weighed 28.6 mg (0.2 mmol) of AgCl powder, then added 1 ml of DMF, then added concentrated hydrochloric acid dropwise and oscillated until the AgCl powder was completely dissolved, thereby obtaining the corresponding Ag-Cl complex solution. The solution was further added into DMF to dilute to 50 times, after adding 0.2mmol PVP, under constant stirring, drip into solvent (water, methanol, or ethanol), until a milky white transparent or translucent solution was formed, to obtain corresponding AgCl sol.

Embodiment 2

[0020] Weighed 28.6 mg (0.2 mmol) of AgCl powder, then added 1 ml of DMF, then added concentrated hydrochloric acid dropwise and oscillated until the AgCl powder was completely dissolved, thereby obtaining the corresponding Ag-Cl complex solution. The solution was further added to DMF to dilute to 100 times, and then 0.2 mmol of PVP was added and stirred until completely dissolved. Place the container of the solution in a small desiccator, and keep the solution in it under constant stirring; at the same time, place another open container, add a small amount of solvent (water, methanol, or ethanol), and then put The desiccator lid was closed so that the Ag-Cl complex solution was in the vapor from the solvent (water, methanol, or ethanol). When the diluted Ag-Cl complex solution turns milky white transparent or translucent, the corresponding AgCl sol is obtained.

Embodiment 3

[0022] Weighed 14.3 mg (0.1 mmol) of AgCl powder, then added 1 ml of DMF, then added concentrated hydrochloric acid dropwise and oscillated until the AgCl powder was completely dissolved, thereby obtaining the corresponding Ag-Cl complex solution. This solution is further added into DMF and diluted to 100 times, after adding 0.05mmol PVP, under constant stirring, drop a mixed solvent (a mixed solvent of two solvents in water, ethanol or methanol, or a mixed solvent of three kinds of solvents) solvent), until a milky white transparent or translucent solution is formed, that is, the corresponding AgCl sol is obtained.

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Abstract

The invention discloses a method for preparing silver chloride sol and silver sol from AgCl powder, which comprises the following two steps that: (1) AgCl powder is dissolved in a mixed solution of DMF and HCl, namely the formation of an Ag-Cl complex solution; and (2) the Ag-Cl complex solution reacts with a solvent (one of water, methanol and ethanol or a mixed solvent), AgCl sol can be obtained under the control of PVP, the pH value of the Ag-Cl complex solution is adjusted to be between 10.0 and 11.5, and yellow silver nano-sol can be obtained under heating conditions. The method has the advantages of simple process, easy realization, and lower cost.

Description

technical field [0001] The present invention relates to a kind of method that utilizes the solid powder of AgCl to prepare silver chloride sol (nano-silver chloride) and silver sol (nano-silver), be specifically related to the dissolving (Ag-Cl complexation) of AgCl powder in the mixed solution of DMF and HCl Formation of compound solution), Ag-Cl complex solution in the presence of PVP, reacts with solvent (one or mixed solvent of water, ethanol or methanol) or its vapor to form milky white AgCl sol; regulate Ag-Cl When the pH value of the complex solution is heated, a yellow silver sol is formed. Background technique [0002] Silver halide is an important semiconductor with important applications in photography, electrochemistry, photoelectrochemistry, as well as catalysis and ion conductor, and therefore, has been extensively studied. Among them, AgCl material is the most important kind of silver halide material, which has been widely used in fields including catalysis. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G5/02C22B11/00
Inventor 赵崇军徐云龙钱秀珍李兵王猛马新胜
Owner EAST CHINA UNIV OF SCI & TECH
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