Synthesis of Microporous Materials and Their Adsorptive Properties of H₂S for Dental Application

Abstract

The microporous materials, Zeolite A and ZSM-5 were hydrothermally synthesized and their H2S adsorption was studied. The obtained samples were put into a separable glass flask filled with H2S gas, and the change in concentrations of H2S was measured for 1–48 h at rt. Then the samples were taken out and put into a pyrolysis plant attached to gas chromatography-mass spectroscopy to determine the amount of H2S desorbed from samples. The amount of H2S adsorbed on Zeolite A was found to be larger than that on ZSM-5. That is 46% of H2S was desorbed from Zeolite A when heated at 400 °C, while 24% of H2S was desorbed from ZSM-5. The adsorption/desorption behavior of H2S from zeolite materials could be interpreted by the electrostatic interaction between H2S and adsorbent.