摘要
The limited utilization efficiency of the solar spectrum remains a critical challenge in achieving the advanced photoelectrocatalysis (PEC)-based sustainable wastewater treatment and water splitting. Herein, a novel Mo-doped BiVO 4 (MBVO) incorporating an upconverting composite film (UCF) was developed to serve as the upconversion photoanode material for extending the utilization efficiency of long wavelength as well as for enhancing the degradation efficiency of enrofloxacin (ERN) and H 2 production from water splitting. The UCF utilizes a sensitized triplet-triplet annihilation (TTA) mechanism to convert sub-bandgap green light (500–530 nm) to super-bandgap blue light (400–440 nm) under sun irradiation. With platinum octaethylporphyrin (PtOEP) as the sensitizer and diphenyl anthracene (DPA) as the emitter, the PtOEP/DPA chromophores can enhance the visible-light absorption efficiency of 5 % Mo-doped BiVO 4 (5MBVO) by 15 %, which can effectively trigger the photodegradation of ENR on the photoanode and hydrogen (H 2 ) evolution on the photocathode. In the presence of UCF, a nearly complete photodegradation of ENR is achieved under neutral pH conditions. The pseudo-first-order rate constants for ENR photodegradation are highly dependent on environmental parameters including pH, co-ions, and initial ENR concentration. Along with ENR photodegradation at the photoanode, H 2 production of 16.9 mmol g −1 h −1 is observed from water splitting at the photocathode, which is 1.25 and 4.2 times higher than those of BVO and 5MBVO, respectively. These results elaborate the significance of the UCF-assisted MBVO as an effective photoanode material to enhance the visible-light absorption efficiency for the photodegradation of antibiotics and water splitting, which highlights its potential to address the water-energy nexus in water and wastewater treatment.