Carbon nanotubes-ferrite-manganese dioxide micromotors for advanced oxidation processes in water treatment

Maria-Hormigos, Roberto, Pacheco, Marta, Jurado-Sánchez, Beatriz y Escarpa, Alberto . (2018) Carbon nanotubes-ferrite-manganese dioxide micromotors for advanced oxidation processes in water treatment. Environmental Science: Nano; Volumen: 5 (12); Año: 2018; Páginas: 2993-3003

Ficheros (Some files may be inaccessible until you login with your e-spacio credentials)
Nombre Descripción Tipo MIME Size
Maria_Hormigos_Roberto_Ferrite-Micromotors.pdf Maria Hormigos_Roberto_Ferrite-Micromotors.pdf application/pdf 977.93KB

Título Carbon nanotubes-ferrite-manganese dioxide micromotors for advanced oxidation processes in water treatment
Autor(es) Maria-Hormigos, Roberto
Pacheco, Marta
Jurado-Sánchez, Beatriz
Escarpa, Alberto
Materia(s) Ciencias
Abstract Multifunctional SW-Fe2O3/MnO2 tubular micromotors are used for ‘on-the-fly’ advanced water oxidation of industrial organic pollutants. Catalytic decomposition of H2O2 as an oxidation agent results in the production of oxygen bubbles and hydroxyl radicals for complete mineralization of model pollutants into CO2 and H2O. The carbon backbone with Fe2O3 nanoparticles results in a rough catalytic layer for increased speed (16-fold acceleration as compared with smooth counterparts) and a higher radical production rate. The micromotors can propel autonomously in complex wastewater samples (400 μm s−1, 2% H2O2) using a biocompatible surfactant and obviating the need for expensive Pt catalysts. Such self-propelled micromotors act as highly efficient dynamic oxidation platforms that offer significantly shorter and more efficient water treatment processes, reducing the use of chemical reagents. The effective operation of the SW-Fe2O3/MnO2 micromotors is illustrated towards the oxidative degradation of mg L−1 levels of Remazol Brilliant blue and 4-chlorophenol. Factors influencing the micromachine-enhanced oxidation protocol, such as the pH, navigation time and number of motors, have been investigated. High degradation rates of ∼80% are obtained for both pollutants following 60 min treatment of spiked wastewater samples at pH 4.0–5.0. The unique magnetic properties of the outer Fe2O3 layer allow the reusability of the micromotors and its convenient recovery and disposal after treatment. Such attractive performance holds considerable promise for its application in large scale water treatment systems and for a myriad of environmental, industrial and security defense fields
Editor(es) Royal Society of Chemistry
Fecha 2018
Formato application/pdf
Identificador bibliuned:DptoCA-FCIE-Articulos-Rmaria-0002
http://e-spacio.uned.es/fez/view/bibliuned:DptoCA-FCIE-Articulos-Rmaria-0002
DOI - identifier https://doi.org/10.1039/C8EN00824H
Nombre de la revista Environmental Science: Nano
Número de Volumen 5
Número de Issue 12
Página inicial 2993
Página final 3003
Publicado en la Revista Environmental Science: Nano; Volumen: 5 (12); Año: 2018; Páginas: 2993-3003
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia http://creativecommons.org/licenses/by-nc-nd/4.0
info:eu-repo/semantics/openAccess
Tipo de acceso Acceso abierto
Notas adicionales The registered version of this article, first published in Environmental Science: Nano, is available online at the publisher's website: Royal Society of Chemistry, https://doi.org/10.1039/C8EN00824H
Notas adicionales La versión registrada de este artículo, publicado por primera vez en Environmental Science: Nano, está disponible en línea en el sitio web del editor: Royal Society of Chemistry, https://doi.org/10.1039/C8EN00824H

Tipo de documento: Artículo de revista
Collections: Departamento de Ciencias Analiticas. Artículos
Set de artículo
Set de openaire
 
Versiones
Versión Tipo de filtro
Contador de citas: Google Scholar Search Google Scholar
Estadísticas de acceso: 36 Visitas, 14 Descargas  -  Estadísticas en detalle
Creado: Wed, 24 Jan 2024, 00:26:22 CET