Issue 33, 2019

A Eu-MOF/EDTA-NiAl-CLDH fluorescent micromotor for sensing and removal of Fe3+ from water

Abstract

This paper reports a novel bioinspired Pt-free three-dimensional (3D) EDTA (Ethylene Diamine Tetraacetic Acid)-functionalized Eu-MOF (Metal Organic Framework)-based fluorescent micromotor as an active self-propelled micromachine for detection, capturing, and removal of Fe3+ from water. This micromotor was composed of EDTA-NiAl-CLDHs (calcined layered double hydroxides)/MnO2 and a Eu-MOF, with each component functioning differently. The outer fluorescent Eu-MOF layer acted as a fluorescent sensor for detecting Fe3+, while the inner EDTA-functionalized NiAl-CLDH/MnO2 layer functioned as a functional unit for Fe3+ adsorption, as well as the buffer layer for the nucleation and growth of the Eu-MOF. MnO2 served as a catalyst in decomposing H2O2 for self-propulsion of the micromotor. The obtained micromotor exhibited a circle motion form with an average speed of 56.9 μm s−1 in 5 wt% H2O2. This EDTA-functionalized Eu-MOF-based fluorescent micromotor showed excellent selectivity, high sensitivity (Stern–Volmer constant Ksv = 1.3 × 104 L mol−1, and limit of detection LOD = 0.15 μM) and high adsorption capacity (the maximum equilibrium adsorption capacity qmax = 112 mg g−1) for Fe3+. Therefore, the novel 3D bifunctional fluorescent micromotor combining the MOF, EDTA-functionalized CLDHs and autonomous motion is promising for the simultaneous detection/adsorption and removal of pollutants, expanding the potential resources for micromotors and providing an efficient option for water quality monitoring and wastewater treatment.

Graphical abstract: A Eu-MOF/EDTA-NiAl-CLDH fluorescent micromotor for sensing and removal of Fe3+ from water

Supplementary files

Article information

Article type
Paper
Submitted
21 Jun 2019
Accepted
31 Jul 2019
First published
01 Aug 2019

J. Mater. Chem. C, 2019,7, 10297-10308

A Eu-MOF/EDTA-NiAl-CLDH fluorescent micromotor for sensing and removal of Fe3+ from water

W. Yang, J. Li, Z. Xu, J. Yang, Y. Liu and L. Liu, J. Mater. Chem. C, 2019, 7, 10297 DOI: 10.1039/C9TC03328A

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