O2 production UiO-66-NH2 (µmol/g) Error UiO-66-NH2 (µmol/g) O2 production MIL-88B (µmol) Error MIL-88B (µmol/g) O2 production UiO-66-NH2@MIL-88B (µmol) Error UiO-66-NH2@MIL-88B (µmol/g) After 1h 132,97105 21 83,102 18 221,31073 16 After 3h 296,1005 19 154,73154 17 393,72539 19