TY - JOUR
T1 - Impurity level in SnO2 materials and its impact on gas sensing properties
AU - Pavelko, R. G.
AU - Yuasa, M.
AU - Kida, T.
AU - Shimanoe, K.
AU - Yamazoe, N.
N1 - Funding Information:
R.G.P. gratefully acknowledges a scholarship from the Japan Society for the Promotion of Science and financial support from JSPS grant-in-aid No. 23 01343 . He is also thankful to Prof. V.G. Sevastyanov and Dr. A.V. Steblevskiy for the laser-spark mass-spectrometry.
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/4
Y1 - 2015/4
N2 - Using the same protocol for precipitation of tin hydroxide and its hydrothermal treatment (HT), we synthesize SnO2 from three precursors - tin(IV) acetate, tin(IV) hydroxide acetate and tin(IV) chloride pentahydrate. After annealing on sensor substrates the materials were found to be very similar from structural point of view. However, their sensing properties (responses to CO and H2 as a function of humidity) were discovered to be very different, which was related to different impurity level in the samples. High amount of chlorine and potassium (ca. 300 ppmw) in two samples corresponded well to notably high water vapor effect. Differences in surface areas (within 20-60 m2/g) and pore volumes (between 0.11 and 0.19 cm3/g), found for the materials in question, seem to play minor role if the impurities are present.
AB - Using the same protocol for precipitation of tin hydroxide and its hydrothermal treatment (HT), we synthesize SnO2 from three precursors - tin(IV) acetate, tin(IV) hydroxide acetate and tin(IV) chloride pentahydrate. After annealing on sensor substrates the materials were found to be very similar from structural point of view. However, their sensing properties (responses to CO and H2 as a function of humidity) were discovered to be very different, which was related to different impurity level in the samples. High amount of chlorine and potassium (ca. 300 ppmw) in two samples corresponded well to notably high water vapor effect. Differences in surface areas (within 20-60 m2/g) and pore volumes (between 0.11 and 0.19 cm3/g), found for the materials in question, seem to play minor role if the impurities are present.
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U2 - 10.1016/j.snb.2015.01.038
DO - 10.1016/j.snb.2015.01.038
M3 - Article
AN - SCOPUS:84921966439
SN - 0925-4005
VL - 210
SP - 719
EP - 725
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -