Issue 12, 2022

Peptide-templated biomineralization of titanium dioxide toward improved light absorption and photodegradation activity

Abstract

The mineralization of TiO2 has been previously investigated by controlling the morphology and crystal phase of TiO2 using several organic templates, but the relationship between the molecular structure of the template and the functionality of the mineralized TiO2 has not been reported. In this study, we investigated the influence and photodegradation activity of the TiO2 mineralized by different functional groups on the peptide template surface (i.e., Ac-(Val-Lys-Val-Lys-Val-Glu)3-CONH2: KE, Ac-(Val-Lys-Val-Lys-Val-Ser)3-CONH2: KS, and Ac-(Val-Lys-Val-Lys-Val-Tyr)3-CONH2: KY). The KE–TiO2 and KS–TiO2 hybrids exhibited absorption only in the UV region (<380 nm), whereas the KY–TiO2 hybrid absorbed in a wider wavelength region that stretched into the visible spectrum (<500 nm). In addition, the KS–TiO2 hybrid showed a higher self-photosensitized degradation activity than the other systems owing to an efficient separation between electrons and holes, whereas the KY–TiO2 hybrid showed not only a reduction in self-photosensitized degradation activity due to the recombination between the methylene blue+˙ radical cation (MB+˙) and the injected electron, but also an increase in photocatalytic activity under UV or visible light irradiation. Our findings show that biomineralizing TiO2 presents an excellent and highly attractive approach to further functionalizing and optimizing TiO2via an inexpensive and facile process, which will find use in all research fields that utilize TiO2 for such purposes.

Graphical abstract: Peptide-templated biomineralization of titanium dioxide toward improved light absorption and photodegradation activity

Supplementary files

Article information

Article type
Paper
Submitted
06 Jul 2022
Accepted
01 Nov 2022
First published
03 Nov 2022

Mol. Syst. Des. Eng., 2022,7, 1602-1610

Peptide-templated biomineralization of titanium dioxide toward improved light absorption and photodegradation activity

R. Tsuchiya and K. Murai, Mol. Syst. Des. Eng., 2022, 7, 1602 DOI: 10.1039/D2ME00136E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements