Synthesis of Nano Cu particles-Problem solving

In summary, the conversation discusses the process of preparing nano Cu particles using CuCl2 and NaBH4 in a PVP solution. The solution turns gold after NaBH4 is added, indicating successful formation of the particles. However, in recent experiments, the solution turns black after 3 minutes and the particles appear agglomerated. Various attempts to solve this issue have been unsuccessful. One suggestion is to try adding ascorbic acid to the solution.
  • #1
vinhphysics
11
0
Dear all,
I am preparing nano Cu particle by reaction of CuCl2 with NaBH4 in PVP solution. CuCl2 and PVP were mixed ultrasonically in pure water. Before dropping NaBH4 solution, the water was bubbled by N2 to remove O2. After dropping NaBH4, the solution turns into gold color. This means that the nano Cu particle was formed.
The problem is: Several weeks later, we carried out the experiments again but they did not repeat (I mean the reactions had not been like that before). After dropping NaBH4, the solution turns into gold color and then (after 3min) it turns into black. The particles seem to be agglomerated (See video: https://www.youtube.com/watch?v=so7UjVDDtR0&feature=youtu.be ).
We do many ways to solve this problem but it is not success. Please give me your suggestions!
Thank you very much!
 
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  • #2
I'm sorry you are not generating any responses at the moment. Is there any additional information you can share with us? Any new findings?
 
  • #3
not sure if it would work for you but adding ascorbic acid to copper sulfate produces nano particles.
 

1. What is the purpose of synthesizing Nano Cu particles?

The purpose of synthesizing Nano Cu particles is to create tiny copper particles with a diameter of less than 100 nanometers. These particles have unique properties that make them useful in various applications such as electronics, catalysis, and medical imaging.

2. What are the common methods for synthesizing Nano Cu particles?

The common methods for synthesizing Nano Cu particles include chemical reduction, thermal decomposition, and electrochemical methods. Each method has its advantages and disadvantages, and the choice of method depends on the desired particle size, shape, and properties.

3. What are the challenges in synthesizing Nano Cu particles?

The main challenge in synthesizing Nano Cu particles is controlling their size and shape. Due to their small size, the particles tend to agglomerate, making it difficult to achieve a uniform size distribution. Additionally, the synthesis process must be carefully controlled to prevent the formation of impurities or unwanted side products.

4. How can the problem of particle agglomeration be addressed?

To address the problem of particle agglomeration, various techniques can be employed, such as using surfactants or stabilizers to prevent particles from sticking together. Additionally, controlling the reaction conditions, such as temperature and pH, can also help to prevent agglomeration.

5. What are the potential applications of Nano Cu particles?

Nano Cu particles have a wide range of potential applications, including in electronics, where they can be used in conductive inks, coatings, and sensors. They also have applications in catalysis, where they can act as efficient catalysts for various chemical reactions. Other potential applications include medical imaging, antimicrobial coatings, and energy storage devices.

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