How can you identify silica from FTIR?
This page summarizes the recurring FTIR evidence reported for silica, including the most frequent peaks, supporting functional groups, and literature-backed interpretation patterns. It is a structured evidence page, not a claim of automatic single-spectrum certainty.
Backed by 105 cited sources
Quick answer
silica is usually reported with a recurring pattern of peaks and functional-group evidence. The most useful approach is to cross-check at least two characteristic peaks before treating it as a match, then verify whether the full spectrum still fits the same material family.
Peak interpretation
Possible materials / groups
| Functional group | Evidence |
|---|---|
| Silicon-oxygen (Si-O) | 118 |
| Silicon (Si) | 97 |
| Alkyl C-H | 85 |
| Hydroxyl (O-H) | 78 |
| Siloxane (Si-O-Si) | 78 |
| Silanol (Si-OH) | 55 |
| Acetate | 37 |
| Methacrylate | 35 |
Spectrum logic
The logic here is evidence aggregation: repeated literature mentions of silica, repeated peak positions, and repeated functional-group associations. A strong material hypothesis should still be supported by multiple peaks that agree with each other, not by one headline band alone.
Real-world usage
This page is designed for polymer identification, incoming-material QC, unknown plastic analysis, recycled-content review, and literature-backed interpretation of reference spectra.
Common mistakes
- Calling a material match too early because one famous peak is present.
- Ignoring sample prep, fillers, oxidation, water, or additives that can change the apparent pattern.
- Using literature evidence without checking whether your own sampling mode and spectrum quality are comparable.
Verification advice
Use DSC, GC-MS, or TGA to validate the material hypothesis when the peak pattern is ambiguous or mixed.
Literature behind this page
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confidence 6.1
silica
Ismail 等 - 2015 - Effect of Radiation on Properties of ENRPVCSiO2 DOI: 10.1063/1.4931308 -
confidence 6.1
silica
Abouzeid 等 - 2022 - PREPARATION AND PROPERTIES OF NOVEL BIOCOMPATIBLE DOI: 10.1615/CritRevBiomedEng.v40.i5.10 -
confidence 6.1
silica
Mineralization and Preservation of an extremotolerant Bacterium Isolated from an Early Mars Analog Environment DOI: 10.1038/s41598-017-08929-4 -
confidence 6.1
silica
Jochem 等 - 2013 - Effects of 400 keV electrons flux on two space gra DOI: 10.1016/j.matchemphys.2013.05.002 -
confidence 6.1
silica
Miller 等 - 2012 - Evaluating portable infrared spectrometers for mea DOI: 10.1039/c1em10678c. -
confidence 4.9
Silica
Corzo-Deluquez 等 - 2021 - Biosynthesized Silica Nanosuspension as Thermal Fl DOI: 10.3390/e23020142 -
confidence 4.9
silica
Removal of zinc ions from model wastewater system using bicopolymer membranes with fumed silica DOI: 10.1016/j.jwpe.2015.08.001 -
confidence 4.9
silica
Hydrolysis–condensation reactions of TEOS in the presence of acetic acid leading to the generation of glass-like silica microspheres in solution at room temperature DOI: 10.1039/B003221M -
confidence 4.9
Silica
Study of Structural and Magnetic Properties of Silica and Polyethylene Glycol (PEG-4000)-Encapsulated Magnesium Nickel Ferrite (Mg<sub>0.5</sub>Ni<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>) Nanoparticles DOI: 10.1088/1757-899X/202/1/012047 -
confidence 4.9
silica
A facile synthesis of ZSM-11 zeolite particles using rice husk ash as silica source DOI: 10.1016/j.matlet.2012.07.079
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