Effect of water ethanol solvents mixture on textural and gas sensing properties of tin oxide prepared using epoxide-assisted sol-gel process and dried at ambient pressure

D. B. Mahadik, Yoon Kwang Lee, Chang Sun Park, Hee Yoon Chung, Min Hee Hong, Hae Noo Ree Jung, Wooje Han, Hyung Ho Park

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

High-surface-area tin oxide aerogels have been synthesized by an ambient-pressure drying method, using a non-alkoxide tin precursor and a hybrid sol-gel technique. The tin precursor was dissolved in different volume ratios of mixed water and ethanol solvents, and gelation was attained by means of an epoxide-initiated gelation process. The solvent in the gel was successively replaced with low-surface-tension solvents, and finally the gels were dried at ambient pressure in an oven. It was observed that solvent combinations significantly altered the textural properties of tin oxide aerogels. The solvent exchange process used prior to ambient-pressure drying helped to minimize impurities originating from the tin precursor. The tin oxide aerogels had the maximum specific surface area of 209 m2/g and small crystallite size (<6.5 nm) after an annealing treatment at 500 °C for 2 h. The sensitivity of a SnO2 sensor to CO gas was found to be strongly affected as the specific surface area of its constituent tin oxide aerogel was increased from 121 m2/g to 209 m2/g. This study offers evidence of the effects of tin oxide aerogel's specific surface area upon its gas sensing performance.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalSolid State Sciences
Volume50
DOIs
Publication statusPublished - 2015 Dec

Fingerprint

Aerogels
epoxy compounds
aerogels
Epoxy Compounds
sol-gel processes
Tin oxides
Sol-gel process
tin oxides
Ethanol
ethyl alcohol
Gases
Tin
Water
Specific surface area
tin
gases
water
gelation
gels
Gelation

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Mahadik, D. B. ; Lee, Yoon Kwang ; Park, Chang Sun ; Chung, Hee Yoon ; Hong, Min Hee ; Jung, Hae Noo Ree ; Han, Wooje ; Park, Hyung Ho. / Effect of water ethanol solvents mixture on textural and gas sensing properties of tin oxide prepared using epoxide-assisted sol-gel process and dried at ambient pressure. In: Solid State Sciences. 2015 ; Vol. 50. pp. 1-8.
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Effect of water ethanol solvents mixture on textural and gas sensing properties of tin oxide prepared using epoxide-assisted sol-gel process and dried at ambient pressure. / Mahadik, D. B.; Lee, Yoon Kwang; Park, Chang Sun; Chung, Hee Yoon; Hong, Min Hee; Jung, Hae Noo Ree; Han, Wooje; Park, Hyung Ho.

In: Solid State Sciences, Vol. 50, 12.2015, p. 1-8.

Research output: Contribution to journalArticle

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AU - Han, Wooje

AU - Park, Hyung Ho

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N2 - High-surface-area tin oxide aerogels have been synthesized by an ambient-pressure drying method, using a non-alkoxide tin precursor and a hybrid sol-gel technique. The tin precursor was dissolved in different volume ratios of mixed water and ethanol solvents, and gelation was attained by means of an epoxide-initiated gelation process. The solvent in the gel was successively replaced with low-surface-tension solvents, and finally the gels were dried at ambient pressure in an oven. It was observed that solvent combinations significantly altered the textural properties of tin oxide aerogels. The solvent exchange process used prior to ambient-pressure drying helped to minimize impurities originating from the tin precursor. The tin oxide aerogels had the maximum specific surface area of 209 m2/g and small crystallite size (<6.5 nm) after an annealing treatment at 500 °C for 2 h. The sensitivity of a SnO2 sensor to CO gas was found to be strongly affected as the specific surface area of its constituent tin oxide aerogel was increased from 121 m2/g to 209 m2/g. This study offers evidence of the effects of tin oxide aerogel's specific surface area upon its gas sensing performance.

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