2026-06-27T22:45:58Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/940262025-03-18T14:52:22Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Vilela García, Diana author Parmar, Jemish author Zeng, Yongfei author Zhao, Yanli author Sánchez, Samuel 2024-01-19T11:47:01Z 2024-01-19T11:47:01Z 2016 Graphene-Based Microbots for Toxic Heavy Metal Removal and Recovery from Water Diana Vilela, Jemish Parmar, Yongfei Zeng, Yanli Zhao, and Samuel Sánchez Nano Letters 2016 16 (4), 2860-2866 DOI: 10.1021/acs.nanolett.6b00768 1530-6984 10.1021/acs.nanolett.6b00768 https://hdl.handle.net/20.500.14352/94026 1530-6992 https://doi.org/10.1021/acs.nanolett.6b00768 Heavy metal contamination in water is a serious risk to the public health and other life forms on earth. Current research in nanotechnology is developing new nanosystems and nanomaterials for the fast and efficient removal of pollutants and heavy metals from water. Here, we report graphene oxide-based microbots (GOx-microbots) as active self-propelled systems for the capture, transfer, and removal of a heavy metal (i.e., lead) and its subsequent recovery for recycling purposes. Microbots’ structure consists of nanosized multilayers of graphene oxide, nickel, and platinum, providing different functionalities. The outer layer of graphene oxide captures lead on the surface, and the inner layer of platinum functions as the engine decomposing hydrogen peroxide fuel for self-propulsion, while the middle layer of nickel enables external magnetic control of the microbots. Mobile GOx-microbots remove lead 10 times more efficiently than nonmotile GOx-microbots, cleaning water from 1000 ppb down to below 50 ppb in 60 min. Furthermore, after chemical detachment of lead from the surface of GOx-microbots, the microbots can be reused. Finally, we demonstrate the magnetic control of the GOx-microbots inside a microfluidic system as a proof-of-concept for automatic microbots-based system to remove and recover heavy metals. eng Attribution 4.0 International Graphene-Based Microbots for Toxic Heavy Metal Removal and Recovery from Water journal article 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