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

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

doi:10.1021/acsomega.4c08624

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

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

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	51474-51480
Number of pages	7
Journal	ACS OMEGA
Volume	9
Issue number	52
Early online date	16 Dec 2024
DOIs	https://doi.org/10.1021/acsomega.4c08624
Publication status	Published - 31 Dec 2024

Data Availability Statement

The data supporting this article have been included as part of
the Supporting Information.

Funding

The authors are grateful for the financial support from INEO and the Brazilian agencies CNPq, CAPES and FAPESP (grants 2018/22214-6, 2019/13514-9, 2022/00243-0, 2022/03758-0, and 2022/15122-3). The Article Processing Charge for the publication of this research was funded by the Coordination for the Improvement of Higher Education Personnel - CAPES (ROR identifier: 00x0ma614).

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abstract = "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.",

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

Abstract

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