We have determined the point of zero charge (PZC) of CaFe2O4 nano particles by salt dilution method using 0.1 M KCL solution after taking reading at 48 hrs of contact time. PZC of CaFe2O4 naono-particles was ~5.3. But few literature have reported the PZC of Cafe2O4 as ~4.7 as determined by zeta potential analyzer. I wanted to know whether application of salt dilution method in this case is okay? If not please suggest the solutions.
Thanks,
Dear, Debnath
I am sorry for my helpless in your question about the dertermination of PZC, because I did less research on this topic. I suggest that you can have a try about your idea.
Dear Colleague,
Please find enclosed a manuscript proposing a simple method to determine PZC. Kindly note that this manuscript is intended to determine PZC of activated carbons. However, I have tested it in a number of different materials with good results.
I hope it will be of help.
With the kindest regards,
Eduardo
Estimation of PZC by zeta potential is only an estimate. Zeta potential (more strictly, electrophoretic mobility) measurements can be used to find when the potential/mobility is zero. This is the isoelectric point and is not necessarily the same as point of zero charge.
In addition, when you are near pH5, the presence or absence of dissolved carbon dioxide can make quite a difference to the pH at which potential/mobility is near zero. So, too, can the presence of other ionic species that are bound to your particles.
@asif ayub
Stop digging up old threads just so you can link to your unrelated YouTube video.
Your behavior ruins RG.
I have reported your account for violating RG's terms and conditions.
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