| Abstract Scope |
The aim of this talk is to describe what happens when a number of Ti-, Mn-, and Fe-based water insoluble precursor powders are placed in high pH environment at temperatures < 100 °C under ambient pressures for 10's of hours. In the Ti-case, we obtained lepidocrocite titania-based, 1DL, sub-nano filaments, NFs, ≈ 5x7 Å in cross-section. Depending on how they are washed, the 1D NFs self-assemble into 2D flakes, mesoscopic particles or nanoparticles. In some cases, the conversion is 100 % precluding the need for centrifuges, filters, etc. We currently routinely make 100 g batches in a lab setting. The photochemical production of H2 and dye degradation using these 1D NF will be discussed. In the Mn-case, five water-insoluble Mn-bearing precursors, were converted to birnessite 2D MnO2 flakes, that are quite crystalline. In the Fe-case we end up with 20-30 nm spherical NPs that are ferrimagnetic. |