UiO-66 was synthesised based on reported methods; its structure was confirmed by Pawley refinement of the PXRD data (Fig, , Table ). TGA shows a Td of ~350 °C (Fig. ), giving a working range for composite formation of 278< Tw <350 °C; a Tw of 300 °C was selected to reduce loss of Bragg peak intensities (Fig ). The working pressure selected was 0.074 GPa to minimise Bragg peak broadening (Fig. ).