Hard template route for synthesis of mesoporous spinel type oxides with ordered structure

摘要

The binary mesoporous spinel oxides with high surface area have been synthesized by using KIT-6 and SBA-15 as hard templates and hydrated nitrated salts as precursors. Low temperature such as 500 °C is suitable for preparation of NiCo_2O_4 with spinel phase. High temperature such as 800 °C is necessary for preparation of NiMn_2O_4, MnCo_2O_4, and (Co_(0.5)Mn_(0.5)_3O_4 with pure spinel phase. The prepared mesoporous spinel shows high surface area as 43-105 m /g with pore volume as 0.095-0.233 cm~3/g. It is preferred to form mesoporous NiCo_2O_4 with spherical particles.