Sensitive and fast response ethanol chemical sensor based on as-grown Gd2O3 nanostructures
来源期刊：Journal of Rare Earths2015年第2期
论文作者：M.M.Abdullah Mohammed M.Rahman Houcine Bouzid M.Faisal Sher Bahadar Khan S.A.Al-Sayari Adel A.Ismail
文章页码：214 - 220
摘 要：Well crystalline gadolinium oxide（Gd2O3） nanostructures were grown by annealing the hydrothermally as-prepared nanostructures without using any template. Microscopic studies of Gd2O3 nanostructures were recorded along the [111] direction due to the clearly resolved interplanar distance d（222）0.31 nm of the cubic crystal structure Gd2O3. Sensing mechanism of Gd2O3 as efficient electron mediator for the detection of ethanol was explored. As-fabricated sensor demonstrated the high-sensitivity of 0.266 μAm/M/cm2 with low detection limit（52.2 μmol/L） and correlation coefficient（r2, 0.618）. To the best of our knowledge, this was the first report for the detection of ethanol using as-grown（at 1000 oC） Gd2O3 nanostructures by simple and reliable I-V technique and rapid assessment of the reaction kinetics（in the order of seconds）. The low cost of the starting reagents and the simplicity of the synthetic route made it a promising chemical sensor for the detection of various toxic analytes, which are not environmentally safe.
M.M.Abdullah1，Mohammed M.Rahman2，Houcine Bouzid1,3，M.Faisal1，Sher Bahadar Khan2，S.A.Al-Sayari1,4，Adel A.Ismail1,5
1. Promising Centre for Sensors and Electronic Devices (PCSED), College of Science and Arts, Najran University, P.O. Box-1988,Najran 11001, Saudi Arabia2. Center of Excellence for Advanced Materials Research (CEAMR) & Chemistry Department, King Abdulaziz University, P.O. Box 80203,Jeddah 21589, Saudi Arabia4. College of Science and Arts-Sharoura, Najran University, P.O. Box-1988,Najran 11001, Saudi Arabia5. Central Metallurgical Research and Development Institute (CMRDI),P.O.Box: 87, Helwan 11421, Cairo, Egypt
摘 要：Well crystalline gadolinium oxide（Gd2O3） nanostructures were grown by annealing the hydrothermally as-prepared nanostructures without using any template. Microscopic studies of Gd2O3 nanostructures were recorded along the [111] direction due to the clearly resolved interplanar distance d（222）0.31 nm of the cubic crystal structure Gd2O3. Sensing mechanism of Gd2O3 as efficient electron mediator for the detection of ethanol was explored. As-fabricated sensor demonstrated the high-sensitivity of 0.266 μAm/M/cm2 with low detection limit（52.2 μmol/L） and correlation coefficient（r2, 0.618）. To the best of our knowledge, this was the first report for the detection of ethanol using as-grown（at 1000 oC） Gd2O3 nanostructures by simple and reliable I-V technique and rapid assessment of the reaction kinetics（in the order of seconds）. The low cost of the starting reagents and the simplicity of the synthetic route made it a promising chemical sensor for the detection of various toxic analytes, which are not environmentally safe.
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