Using pomelo peel for the synthesis of monolithic ordered mesoporous silica
Monolithic ordered mesoporous silicas
are highly attractive as sorbents in extraction techniques due to their
physicochemical characteristics. To be really effective, there must be a
balance between their macroporous and mesoporous structure. Macropores enhance
the extraction kinetics allowing an easier diffusion of the target compounds
from the bulk samples to the active surface of the material. Mesoporous defines
the active surface of the material (directly related to the extraction
capacity) and they are usually related to the selectivity of the material
through a shape/size restriction mechanism. This balance is not easy to achieve
and some research groups are investigating in new synthesis procedures.
Prof. Yu-Qi Feng and coworkers have
recently proposed a new alternative in RSC Advances journal using a natural
product, pomelo peel, as precursor [1]. The potential of the new material as
well as the natural origin of one of the precursor (green chemistry) are highly
remarkable.
Our colleagues proposed a double
template model using Cetyltrimethylammonium bromide (CTAB) and pomelo peel as
soft and hard templates, respectively, and tetraethyl orthosilicate (TEOS) as
silica precursor. The idea, which is quite simple, consists of synthesizing
silica structures by the Stöber method on the spongy surface of the pomelo
peel. After the synthesis of the silica structure, the organic templates are
completely removed by calcination.
They use the synthesized material in
a lab-made in syringe SPE (solid phase extraction) system for the enrichment of
peptides in biological samples. The analyses of the final extracts by
matrix-assisted laser desorption/ionization (MALDI)- Time-of-flight mass
spectrometry (TOFMS) have demonstrated the great potential of the material.
We hope that
this excerpt has aroused your curiosity. We warmly recommend the reading of
this article. The readers will find on it the following info
Detailed information that you can find in
the original article
|
The
description of the synthetic procedure
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The
characterization of the material using different techniques such as
energy-dispersive X-ray analysis, X-ray diffraction, Nitrogen sorption
measurements or microscopy
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The
description of the lab-made in syringe SPE
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The
practical application of the material for the enrichment of peptides
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Reference
1) Bioinspired preparation of
monolithic ordered mesoporous silica for enrichment of endogenous peptides. Link to the article
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