Abstract
Cu-doped TiO2 film electrodes are synthesized via sol–gel technique and physically characterized. The Cu-doped TiO2 film electrodes is sensitized by tetrakis (4-carboxyphenyl) porphyrin and applied as a photoanode of a photoelectrochemical biofuel cell (PEBFC). The Cu/TiO2-based PEBFCs show a short-circuit current (Isc) of 75.9 μA, an open-circuit potential (Voc) of 912 mV, a maximum power density (Pmax) of 66.43 μW/cm2 and an overall energy conversion efficiency (η) of 2.16%, respectively. The PEBFCs indicate improved photoelectric performances comparing the TiO2-based PEBFC (Isc: 72.5 μA, Voc: 740 mV, Pmax: 35.34 μW/cm2, η: 1.52%). The Cu/TiO2-based PEBFCs also indicate a higher incident photon-to-collected electron conversion efficiency (IPCE), which is probably due that the doped copper reduces the band gap of a wide-gap TiO2 semiconductor as shown by ab initio band calculation. And the Cu/TiO2-based PEBFC can provide long electron lifetime and decrease electron–hole pair recombination rate, which is responsible for the better performance in the Cu/TiO2-based PEBFC than in the TiO2-based PEBFC.
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Acknowledgements
This work was supported by Health Commission of Jilin Province (2022JC037). This work was supported by Innovation and Entrepreneurship Training Program for College Students in 2022 (202210199030) and in 2023 (88).
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Li, D., Zheng, H., Zhang, F. et al. Effect of copper doping in the TiO2 film electrodes on the performance of photoelectrochemical biofuel cells. J IRAN CHEM SOC 21, 1021–1030 (2024). https://doi.org/10.1007/s13738-024-02972-5
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DOI: https://doi.org/10.1007/s13738-024-02972-5