Please can anyone share the best procedure for the synthesis of copper nanoparticles using ascorbate in water? I need a maximum possible concentration and monodisperse size between 10 and 100 nm. What capping agent do you recommend?
@Hanna Lewandowska
Chemical Reduction technique was employed to prepare highly stable and dispersed Copper nanoparticles using L-Ascorbic Acid (Vitamin C) as reducing as well as capping agent. In this technique, cupric chloride was used as precursor. The effects of different molar ratios of L-Ascorbic Acid on the concentration and size of copper nanoparticles were studied. The average particles size of copper nanoparticle was found in the range of 50-60 nm. The product was kept in ambient conditions for three month but no sedimentation or separation was observed. This method described in details in the below article
Article A green method for the synthesis of Copper Nanoparticles usi...
Article Preparation of Cu nanoparticles with ascorbic acid by aqueou...
Hanna Lewandowska
Copper nanoparticles were obtained by reduction of copper ions in a micellar aqueous solution of cetylpyridinium chloride amphiphile with hydrazine. Citric acid was added to shift the micellar equilibrium to a hydrated state. To 10 ml of a 2 M aqueous solution of hydrazine containing 0.0006 M citric acid and 0.006 M CPC was added 10 ml of a 0.02 M solution of CuCl2 containing 0.0006 M citric acid and 0.006 M CPC under vigorous stirring at room temperature. During the entire experiment, nitrogen was passed through the reaction mixture to avoid oxidation of the resulting copper nanoparticles. The reaction takes 2.5 hours. Received 20 ml of dark red colloidal dispersion. the size of nanoparticles is 1-3 nm. Synthesis can be carried out with cotton fabric. The fabric can be used as a dressing for wounds.
Article Получение и характеризация хлопчатобумажной ткани, модифицир...
Dear Ahmed,
I really appreciate the synthesis from this work, I used this very synthesis as a starting point. I manage to obtain monodisperse NPs by this method. I add 0.01 M ascorbate per 1 mM copper. However, I have some preparatory issues and I mailed one of the authors some time ago.
I will look once more at both papers in the meantime, maybe I missed some important info.
Thank you and Best regards
Dear Everyone. I am trying to do the high yield synthesis from ascorbate and copper salt, according to the similar procedures from the literature (0.18M copper ions) I now tried PVA up to 2%, Tween 20 up to 10%, both, none, dropwise addition of acsorbate, burst addition of ascorbate, nitrogen, air atmosphere, temperatures 50, 60, 90 centigrade. I followed a couple of similar syntheses from the literature, nothing works. What do I do wrong?
- Badges
- Science topic
- Similar topics
- Engineering
- Materials Engineering
- Powders