Control of Nanometer‐Scale Tunnel Sizes of Porous Manganese Oxide Octahedral Molecular Sieve Nanomaterials

Abstract

Manganese oxide octahedral molecular sieves with increasing nanoscale tunnel sizes are systematically synthesized using hydrothermal treatment of Na-birnessite under increasing pH conditions. OMS-5 (2×4), OMS-6 (2×3), and OMS-7 (1×1; see Figure) tunnel structures have been synthesized at pH values of 13, 7.0, and 1.0, respectively.