Publication detail

Radioactive Uranium Preconcentration via Self-Propelled Autonomous Microrobots Based on Metal-Organic Frameworks

YING, Y. POURRAHIMI, A. SOFER, Z. MATĚJKOVÁ, S. PUMERA, M.

Original Title

Radioactive Uranium Preconcentration via Self-Propelled Autonomous Microrobots Based on Metal-Organic Frameworks

Type

journal article in Web of Science

Language

English

Original Abstract

Self-propelled micromachines have recently attracted attention for environmental remediation, yet their use for radioactive waste management has not been addressed. Engineered micromotors that are able to combine highly adsorptive capabilities together with fast autonomous motion in liquid media are promising tools for the removal of nuclear waste, which is one of the most difficult types to manage. Herein, we fabricate self-propelled micromotors based on metal-organic frameworks (MOFs) via template-based interfacial synthesis and show their potential for efficient removal of radioactive uranium. A crucial challenge of the MOF-based motors is their stability in the presence of fuel (hydrogen peroxide) and acidic media. We have ensured their structural stability by Fe doping of zeolitic imidazolate framework-8 (ZIF-8). The implementation of magnetic ferroferric oxide nanoparticles (Fe3O4 NPs) and catalytic platinum nanoparticles (Pt NPs) results in the magnetically responsive and bubble-propelled micromotors. In the presence of 5 wt % H2O2, these micromotors are propelled at a high speed of ca. 860 ± 230 μm·s-1 (i.e., >60 body lengths per second), which is significantly faster than that of other microrod-based motors in the literature. These micromotors demonstrate a highly efficient removal of uranium (96%) from aqueous solution within 1 h, with the subsequent recovery under magnetic control, as well as stable recycling ability and high selectivity. Such self-propelled magnetically recoverable micromotors could find a role in the management and remediation of radioactive waste.

Keywords

micromotors; uranium removal; MOF-based rod structure; bubble propulsion; magnetic control

Authors

YING, Y.; POURRAHIMI, A.; SOFER, Z.; MATĚJKOVÁ, S.; PUMERA, M.

Released

22. 10. 2019

ISBN

1936-0851

Periodical

ACS Nano

Year of study

13

Number

10

State

United States of America

Pages from

11477

Pages to

11487

Pages count

11

URL

https://pubs.acs.org/doi/abs/10.1021/acsnano.9b04960

BibTex

@article{BUT159851,
  author="Yulong {Ying} and Amir Masoud {Pourrahimi} and Zdeněk {Sofer} and Stanislava {Matějková} and Martin {Pumera}",
  title="Radioactive Uranium Preconcentration via Self-Propelled Autonomous Microrobots Based on Metal-Organic Frameworks",
  journal="ACS Nano",
  year="2019",
  volume="13",
  number="10",
  pages="11477--11487",
  doi="10.1021/acsnano.9b04960",
  issn="1936-0851",
  url="https://pubs.acs.org/doi/abs/10.1021/acsnano.9b04960"
}