Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Novel Method for the Preparation of Mesoporous BaSO4 Material with Thermal Stability by Spray Pyrolysis

  • Nagaraja, Bhari Mallanna (Clean Energy Research Center, Korea Institute of Science and Technology) ;
  • Abimanyu, Haznan (Clean Energy Research Center, Korea Institute of Science and Technology) ;
  • Jung, Kwang-Deog (Clean Energy Research Center, Korea Institute of Science and Technology) ;
  • Yoo, Kye-Sang (Department of Chemical Engineering, Seoul National University of Technology)
  • Published : 2008.05.20
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Abstract

Spray pyrolysis has been found as an excellent method for the preparation of mesoporous barium sulfate at higher temperature. Ethylene glycol, a reducing agent, and solvents had good inhibition effect for the preparation of $BaSO_4$ nano particles. The $BaSO_4$ solution was sprayed at 500 & 800 ${^{\circ}C}$ using different solvents such as methanol, ethanol, propanol and n-butyl alcohol. $N_2$ adsorption-desorption isotherm revealed that $BaSO_4$ is micropore free, possessing narrow mesopores size distribution and high BET surface areas of 72.52 $m^2\;g^{-1}$ at 800 ${^{\circ}C}$ using propanol as an additive. Scanning electron microscopy (SEM) indicates that the morphology of $BaSO_4$ nano material shows uniform shell like particles. Transmission electron microscopy (TEM) proved that the resulting BaSO4 nano particles were uniform in size and the average particle size was 4-8 nm. The surface functionality and ethylene glycol peaks were assessed by Fourier transform infrared resonance (FTIR) spectroscopy. Low intensity ethylene glycol specific absorption peak was observed in propanol which proved that propanol had good inhibition effect on the structural morphology of nano particles.

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References

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