The hydrodynamic diameter and zeta potential of MOF and Mn-MOF were determined using DLS (ZetaSizer ZS 90, Malvern Instruments Ltd., Worcestershire, UK). The morphology of MOF and Mn-MOF was observed by TEM (Tecnai G2-20, FEI, Netherlands). PXRD patterns of MOF and Mn-MOF were detected on a Bruker D8 Advance X-ray diffractometer (Bruker AXS GmbH, Karlsruhe, Germany) at a scanning rate of 4º/min with 2θ broadening from 3 to 30° by Cu Ka radiation. TGA of Mn-TCPP, MOF and Mn-MOF was performed on a PerkinElmer Pyris1 TGA (PerkinElmer Instruments, Waltham, MA, USA) from room temperature to 600 °C at a heating rate of 10 °C/min. The specific surface area and pore size of MOF and Mn-MOF were determined by the nitrogen adsorption technique at 150 °C on a micromeritics-ASAP 2420-4 system (Norcross, GA, USA). The elemental composition and valence state of Mn-MOF were evaluated by XPS (AXIS-ULTRA DLD-600W, Shimdzu, Japan). UV-Vis-NIR absorption spectra of MOF and Mn-MOF were conducted on a TU 1901 UV-Vis-NIR spectrometer (Beijing Persee, Beijing, China).

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