Impurity level in SnO2 materials and its impact on gas sensing properties

R. G. Pavelko, M. Yuasa, T. Kida, K. Shimanoe, N. Yamazoe

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)719-725
Number of pages7
JournalSensors and Actuators, B: Chemical
Publication statusPublished - Apr 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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