Efficient Rhodamine B degradation and electricity generation by a photocatalytic fuel cell with visible light response polydopamine/WO/TiO/Ti photoanode
Ionics, ISSN: 1862-0760, Vol: 29, Issue: 3, Page: 1053-1068
2023
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Article Description
In order to solve the rapid recombination of electron–hole pairs, limited optical response range, and single electron and hole transmission path, polydopamine (PDA)/WO and TiO composite (PDA-11.5%/WO/TiO/Ti) photoanode was prepared. Its maximum photocurrent density is 2.03 mA·cm at 1.1 V (vs. SCE), which is 1.47 times higher than that of WO/TiO/Ti. The maximum power density, photocurrent density, and Rhodamine B degradation rate of the photocatalytic fuel cell (PFC) with PDA-11.5%/WO/TiO/Ti photoanode were 18.68 μW·cm, 0.18 mA·cm, and 84.6%, respectively. Its excellent performance is mainly due to the good carrier mobility of PDA and the stepped heterojunction structure formed by PDA-11.5%/WO/TiO/Ti so that photogenerated electrons and holes gather in the conduction bands of WO and HOMO of PDA, respectively. This not only expands the light absorption range and improves the light absorption intensity but also promotes the separation of electron–hole pairs and finally significantly enhances the Rhodamine B degradation and power generation performance of PFC.
Bibliographic Details
Springer Science and Business Media LLC
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