6533b826fe1ef96bd1283a9f
RESEARCH PRODUCT
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subject
Materials scienceGeneral MathematicsSodium dodecylbenzenesulfonateGeneral EngineeringNanotechnologyPolyethylene glycolOrders of magnitude (numbers)symbols.namesakechemistry.chemical_compoundPulmonary surfactantChemical engineeringchemistrySpecific surface areasymbolsRelative humidityParticle sizeRaman spectroscopydescription
NanosizedCeO2powders were synthesized via hydrothermal method with different types of surfactants (polyethylene glycol (PEG), cetyltrimethylammonium bromide (CTAB), and sodium dodecylbenzenesulfonate (SDBS)). X-ray diffraction, Raman spectroscopy, and transmission electron microscopy were utilized to characterize the phase structures and morphologies of the products. The sample with CTAB as surfactant (CeO2-C) has the largest specific surface area and the smallest particle size among these three samples. The humidity sensor fabricated byCeO2-C shows higher performance than those usedCeO2-P andCeO2-S. The impedance of theCeO2-C sensor decreases by about five orders of magnitude with relative humidity (RH) changing from 15.7 to 95%. The response and recovery time are 7 and 7 s, respectively. These results indicate that the performance ofCeO2humidity sensors can be improved effectively by the addition of cationic surfactant.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-01-01 | Mathematical Problems in Engineering |