Hi dear Scientists! :)
I was impregnating Fe or Cu over different mesoporous materials, and after TPDA analysis I concluding that when I decrease the percentage of metal over surface of material, acidity increase (more specifically, strong acidity)...
So, I thought that with increasing of percentage of metal will increase the percentage of acidity, but, this was not like I thought..
I just looking for explanation of this fact, but..... I can't found a very well explanation...
Some one could help me?
In my experience with zeolites which reveal different Si/Al ratios, the zeolites which contain more Al can store more ammonia since there are more OH-groups available on the surface. Though NH3 is coordinated not so strong on these hydroxyl groups in comparison to the zeolites with higher Si/Al ratios.
In my experience with zeolites which reveal different Si/Al ratios, the zeolites which contain more Al can store more ammonia since there are more OH-groups available on the surface. Though NH3 is coordinated not so strong on these hydroxyl groups in comparison to the zeolites with higher Si/Al ratios.
All the cation solutions are acidic medium and ensured the loaded of cation on any mesoporous materials that will go toward the natural medium.
Dear Julián Sánchez
I think you should go for FTIR, zero point charge or EDS analysis which could predict the presence of polar surface functional groups which could be the reason for acidic pH.
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