| Autor: |
Gordon MN; Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA. sskrabal@indiana.edu., Junkers LS; Department of Chemistry and Nanoscience Center, University of Copenhagen, 2100 Copenhagen Ø, Denmark., Googasian JS; Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA. sskrabal@indiana.edu., Mathiesen JK; Department of Chemistry and Nanoscience Center, University of Copenhagen, 2100 Copenhagen Ø, Denmark., Zhan X; Electron Microscopy Center, Indiana University, Bloomington, Indiana 47405, USA., Morgan DG; Electron Microscopy Center, Indiana University, Bloomington, Indiana 47405, USA., Jensen KMØ; Department of Chemistry and Nanoscience Center, University of Copenhagen, 2100 Copenhagen Ø, Denmark., Skrabalak SE; Department of Chemistry, Indiana University, Bloomington, Indiana 47405, USA. sskrabal@indiana.edu. |
| Abstrakt: |
The synthesis of bismuth oxyhalides as defined nanostructures is hindered by their fast nucleation and growth in aqueous solutions. Using our recently developed single-source precursor, the formation of bismuth oxychloride in such solutions can be slowed significantly. As reported herein, this advance enables BiOCl formation to be investigated by in situ X-ray total scattering and in situ liquid cell transmission electron microscopy. In situ pair distribution function analysis of X-ray total scattering data reveals the local order of atomic structures throughout the synthesis, while in situ liquid cell transmission electron microscopy allows for tracking the growth of individual nanoparticles. Through this work, the precursor complex is shown to give rise to BiOCl upon heating in solution without the observation of structurally distinct intermediates. The emerging nanoparticles have a widened interlayer spacing, which moderately decreases as the particles grow. Mechanistic insights into the formation of bismuth oxyhalide nanoparticles, including the absence of distinct intermediates within the available time resolution, will help facilitate future design of controlled BiOX nanostructures. |
