I synthesized GO-SiO2 as a catalyst following the usual procedure; and next, I decided to halve, double, and triple the amount of TEOS that I used in the procedure of synthesis to reach different ratios of graphene oxide to SiO2 and compare their performance as a catalyst. Was this something sensible and scientifically correct? Should I mention this in my article? (I'm no chemistry expert).
Worth mentioning that increasing the amount of TEOS led to remarkably greater porosity of the final GO-SiO2 Nano-material.
Really grateful for your responses in advance.
Amir Mostashari
Porosity creates TEOS. Therefore, the conclusion about this is trivial. However, the GO can make a contribution. Therefore, it will be useful for someone to know about it.
Yuri Mirgorod Sincerely grateful for the response. Just confused about your saying "Porosity creates TEOS". Maybe you meant the opposite. RIGHT??
I added TEOS to extract silica shells and coated them on GO layers.
Thanks for your time
Amir Mostashari Sir,
Not all the TEOS convert to SiO2 while synthesizing, so you need to look how much is converting. You need to do elemental analysis.
about "Worth mentioning that increasing the amount of TEOS led to remarkably greater porosity of the final GO-SiO2 Nano-material" as the SiO2 increases, porosity and surface area should increase.
Try to synthesize GO-SIO2 by wet impregnation method for comparison study also.
Dear Mr. Amid Laxman Sadgar
Sincere thanks for your explanation. For the synthesis, I added 1 gr of GO and 5 gr of TEOS with some other solutions. I obtained 1 gr of GO-SiO2 nanomaterial. The EDS analysis revealed that the weight ratio of C, O, and Si are equal (roughly 33% each). What do you think about it?
Amir Mostashari
From TEOS, a silica hydrogel is obtained by hydrolysis. After drying and removing water, porous silicon is obtained. GO acts as an inert filler in your composition. Therefore, with an increase in TEOS, the porosity of the composition increases.
EDS analysis provides information on the composition of a surface about 5 nm thick. Therefore, it is impossible to judge the composition of the sample as a whole. There is little oxygen in the composition of GO and you do not know it. In the composition of silicon oxide, too. It is in a mesh, polymer, and not in the form of SiO2.
In such case.
I think ICP-AES may helpful to detect the Si percentage.
Mr. Yuri Mirgorod and Mr. Amid Laxman Sadgar
Thanks for your time and kindness. Your answers were informative and illuminating.
Unfortunately, I don't have my material anymore to conduct further analysis on it as I graduated a while ago.
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