Detail publikace

Trapping and detecting nanoplastics by MXene-derived oxide microrobots

URSO, M. USSIA, M. NOVOTNÝ, F. PUMERA, M.

Originální název

Trapping and detecting nanoplastics by MXene-derived oxide microrobots

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Nanoplastic water pollution represents an increasing concern. Here, photogravitactic MXene-derived microrobots are programmed to trap nanoplastics in the layered structure and magnetically transfer them to low-cost electrodes for further detection. Nanoplastic pollution, the final product of plastic waste fragmentation in the environment, represents an increasing concern for the scientific community due to the easier diffusion and higher hazard associated with their small sizes. Therefore, there is a pressing demand for effective strategies to quantify and remove nanoplastics in wastewater. This work presents the "on-the-fly" capture of nanoplastics in the three-dimensional (3D) space by multifunctional MXene-derived oxide microrobots and their further detection. A thermal annealing process is used to convert Ti3C2Tx MXene into photocatalytic multi-layered TiO2, followed by the deposition of a Pt layer and the decoration with magnetic gamma-Fe2O3 nanoparticles. The MXene-derived gamma-Fe2O3/Pt/TiO2 microrobots show negative photogravitaxis, resulting in a powerful fuel-free motion with six degrees of freedom under light irradiation. Owing to the unique combination of self-propulsion and programmable Zeta potential, the microrobots can quickly attract and trap nanoplastics on their surface, including the slits between multi-layer stacks, allowing their magnetic collection. Utilized as self-motile preconcentration platforms, they enable nanoplastics' electrochemical detection using low-cost and portable electrodes. This proof-of-concept study paves the way toward the "on-site" screening of nanoplastics in water and its successive remediation.

Klíčová slova

micromotors; particles; removal

Autoři

URSO, M.; USSIA, M.; NOVOTNÝ, F.; PUMERA, M.

Vydáno

22. 6. 2022

Nakladatel

Springer Nature

Místo

BERLIN

ISSN

2041-1723

Periodikum

NATURE COMMUNICATIONS

Ročník

13

Číslo

1

Stát

Spojené království Velké Británie a Severního Irska

Strany od

3573-1

Strany do

3573-14

Strany počet

14

URL

Plný text v Digitální knihovně

Odpovědnost: Ing. Marek Strakoš