Synthesize and Characterization of Hollow and Core/Shell Based on CeO2 as a Alcohol Sensor
محورهای موضوعی : Journal of Nanoanalysis
Zahra Rasouli
1
(Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran)
Mohammad Yousefi
2
(Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran)
Susan Samadi
3
(Department of Chemistry, College of Basic Science, Yadegar-e-Imam Khomeini (RAH) Shahr-e-Rey Branch, Islamic
Azad University, Tehran, Iran.)
Khadijeh Kalateh
4
(Department of Chemistry, College of Basic Science, Yadegar-e-Imam Khomeini (RAH) Shahr-e-Rey Branch, Islamic
Azad University, Tehran, Iran)
Maryam Bikhof Torbati
5
(Department of Chemistry, College of Basic Science, Yadegar-e-Imam Khomeini (RAH) Shahr-e-Rey Branch, Islamic
Azad University, Tehran, Iran.)
کلید واژه: sensor, Cerium dioxide, Core/Shell, Hollow, Volatile organic compounds,
چکیده مقاله :
In this study, CeO2 hollow spherical nanoparticles, CeO2/SiO2 @ CeO2 core/shell composites,and hollow CeO2/SiO2 sensors were synthesized and their microstructures were researched byFT-IR, XRD, FESEM, EDX and BET analyses. The peaks observed in the FT-IR spectra of the synthesizedsamples corresponded to Ce-O stretching vibration (ca. 566 cm-1) and O-Si-O bendingvibration (ca. 470 cm-1). XRD diffraction patterns showed peaks at 2θ values in the 28.95° ,33.74°, 47.75° , 57.04°, 59.52° ,and 69.4° confirming cubic phase of CeO2. The FESEM imagesshowed that the particle shape was approximately spherical. The results of BET showed that,surface area of the CeO2 hollow spherical nanoparticles, CeO2/SiO2 @ CeO2 and hollow CeO2/SiO2 core/shell particles were 102.78, 80.49, and 119.71 m2/g, respectively. The nanosizedmetal oxides were used to quantitatively and qualitatively identify 1-propanol, 2-propanol,ethanol and methanol. The results showed that, the hollow CeO2/SiO2 core/shell was of largerpotentials for qualitative identification of 1-propanol and quantitative measurement of 2-propanol and ethanol.
