Thermally stable mesoporous barium–iron mixed oxide phases

摘要: Thermally stable mesoporous Ba–Fe and Co–Ti–Ba–Fe mixed oxide phases, have been prepared by employing non-ionic oligomeric surfactants as structure directing agents. The mesostructure formation was achieved controlling hydrogen bonding interactions at the inorganic–organic interface in vicinity of isoelectric point Fe ions. use Tween-20, Brij-35, Triton X-114 agents led to thermally robust phases displaying unimodal pores 4–12 nm range remarkable high specific surface areas up 260 m2/g. observed low saturation magnetization coercitivity values for these novel mesophases, make them highly attractive superparamagnetic applications. To best our knowledge this is first successful example phases.