Manganese-based micro/nanomotors: Synthesis, motion, and applications

Document Type

Journal Article

Publication Title

Small

Volume

17

Issue

50

Publisher

Wiley

School

School of Engineering

RAS ID

39740

Funders

Australian Research Council

Grant Number

ARC Number : DP190103548

Comments

Yang, Y., Hu, K., Zhang, P., Zhou, P., Duan, X., Sun, H., & Wang, S. (2021). Manganese-based micro/nanomotors: Synthesis, motion, and applications. Small, 17(50), article 2100927.

https://doi.org/10.1002/smll.202100927

Abstract

As emerging micro/nano-scale devices, micro/nanomotors have been innovatively applied in the environmental and biomedical applications. In this paper, the recent advances of Mn-based micro/nanomotors (Mn-micro/nanomotors) in catalytic oxidation of organic contaminants and the mechanisms in decomposition of H2O2 (e.g., the generation of O2 bubbles and reactive oxygen species) are reviewed. The intrinsic characteristics and synthetic strategies of Mn-based materials are discussed, aiming to gain comprehensive understandings on the asymmetric design of micro/nanomotors. Mn-micro/nanomotors have many advantages such as flexible structures, biocompatibility, powerful motion, long lifetime, and low-cost as compared to noble-metal micro/nanomotors. These merits fulfil Mn-micro/nanomotors great promises from proof-of-concept studies to realistic applications, including pollutant decomposition, trace detection of heavy metal ions, oil removal, drug delivery, isolation of biological targets, and killing bacteria and cancer cells. The great flexibility in fabrication enables diverse and innovative strategies to address challenges for Mn-micro/nanomotors, including high consumption of H2O2 and non-directional motion. Meanwhile, a perspective of Mn-micro/nanomotors in water remediation by coupling the motors with other Fenton/Fenton-like systems to enhance the catalytic activity and to yield more reactive oxygen species is presented. Directions to the design of on-demand H2O2-fueled Mn-micro/nanomotors for advanced purification of organic contaminants in aquatic systems are also proposed.

DOI

10.1002/smll.202100927

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