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Photoelectrochemical Performance of Brookite Titanium Dioxide Electrodeposited on Graphene Foam for Portable Biosensors

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide We discuss the photoelectroanalytical performance of a brookite-phase titanium dioxide (TiO 2 ) platform electrodeposited onto graphene foam (GF) at low temperatures. The scalable electrosynthesis process eliminates the need for thermal annealing, which is impractical for carbon-based electrodes. Films resulting from a 10 min electrodeposition (TiO 2 -10/GF) exhibit enhanced photocurrents, reaching 170 μA cm –2 GEO ─twice the value for TiO 2 films on traditional screen-printed carbon electrodes (82 μA cm –2 GEO ). The increased photocurrent density makes TiO 2 -10/GF ideal for on-site photoelectrochemical biosensors as it allows for the use of compact systems with low-power LEDs.

Source: ACS Omega

DOI: 10.1021/acsomega.4c08624

Authors: José L. Bott-Neto, Thiago S. Martins, Gabriel J. C. Pimentel, Osvaldo N. Oliveira, Frank Marken