The Effect of KMnO_4 Concentration on the Catalytic Activity of MnO_x/Luffa Sponge Composites

摘要

MnO_x/ luffa sponge composites were prepared by loading MnO_x on/in porous luffa sponge under ambient conditions and an in-situ reduction method. We employed the oxidative decomposition of HCHO as probe reaction to investigate the effect of KMnO_4 concentration on the catalytic activity of MnO_x luffa sponge composites. It is shown that all the MnO_x/ luffa sponge composites bear the activity for the catalytic decomposition of HCHO;;the conversion of HCHO was found to be high at room temperature;;the conversion level of HCHO was first increased and then decreased with the increase in the KMnO_4 concentration. The HCHO conversion over the catalyst prepared from 10 g/L of KMnO_4 solution was the largest among five catalysts.