TY - JFULL AU - M. S. Al-Assiri and M. M. El-Desoky and Ahmed A. Ibrahim and M. Abaker and A. A. Bahgat PY - 2014/5/ TI - Nanocrystalline Na0.1V2O5.nH2O Xerogel Thin Film for Gas Sensing T2 - International Journal of Chemical and Molecular Engineering SP - 364 EP - 369 VL - 8 SN - 1307-6892 UR - https://publications.waset.org/pdf/9999591 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 88, 2014 N2 - Nanocrystalline thin film of Na0.1V2O5.nH2O xerogel obtained by sol gel synthesis was used as gas sensor. Gas sensing properties of different gases such as hydrogen, petroleum and humidity were investigated. Applying XRD and TEM the size of the nanocrystals is found to be 7.5 nm. SEM shows a highly porous structure with submicron meter-sized voids present throughout the sample. FTIR measurement shows different chemical groups identifying the obtained series of gels. The sample was n-type semiconductor according to the thermoelectric power and electrical conductivity. It can be seen that the sensor response curves from 130oC to 150oC show a rapid increase in sensitivity for all types of gas injection, low response values for heating period and the rapid high response values for cooling period. This result may suggest that this material is able to act as gas sensor during the heating and cooling process. ER -