Fig. 1

a The method of ultra-small Ti-TCPP MOF synthesis. DLS curves (b), TEM images (c), zeta potentials (d), XRD pattern (e) and XPS spectra of Ti-TCPP MOF (f–i)
a The method of ultra-small Ti-TCPP MOF synthesis. DLS curves (b), TEM images (c), zeta potentials (d), XRD pattern (e) and XPS spectra of Ti-TCPP MOF (f–i)