At present, both native and immobilized nanoparticles are of great importance in many areas of science and technology. In this paper, we have studied magnetic iron oxide nanoparticles and their aggregates bound on woven cotton textiles employing two simple modification procedures. One modification was based on the treatment of textiles with perchloric-acid-stabilized magnetic fluid diluted with methanol followed by drying. The second procedure was based on the microwave-assisted conversion of ferrous sulfate at high pH followed by drying. The structure and functional properties of these modified textiles were analyzed in detail. Scanning electron microscopy of native and modified textiles clearly showed the presence of iron oxide nanoparticles on the surface of the modified cotton fibers. All of the modified textile materials exhibited light to dark brown color depending on the amount of the bound iron oxide particles. Magnetic measurements showed that the saturation magnetization values reflect the amount of magnetic nanoparticles present in the modified textiles. Small-angle X-ray and neutron scattering measurements were conducted for the detailed structural characterization at the nanoscale of both the native and magnetically modified textiles, and different structural organization of nanoparticles in the two kinds of textile samples were concluded. The textile-bound iron oxide particles exhibited peroxidase-like activity when the N,N-diethyl-p-phenylenediamine sulfate salt was used as a substrate; this nanozyme activity enabled rapid decolorization of crystal violet in the presence of hydrogen peroxide. The deposition of a sufficient amount of iron oxide particles on textiles enabled their simple magnetic separation from large volumes of solutions; if necessary, the magnetic response of the modified textiles can be simply increased by incorporation of a piece of magnetic iron wire. The simplicity of the immobilized nanozyme preparation and the low cost of all the precursors enable its widespread application, such as decolorization and degradation of selected organic dyes and other important pollutants. Other types of textile-bound nanozymes can be prepared and used as low-cost catalysts for a variety of applications.

BCMaterials Basque Center for Materials Applications and Nanostructures 48940 Leioa Spain

Department of Magnetism Institute of Experimental Physics SAS Watsonova 47 040 01 Kosice Slovakia

Department of Nanobiotechnology Biology Centre ISB CAS Na Sadkach 7 370 05 Ceske Budejovice Czech Republic

European Molecular Biology Laboratory Hamburg Outstation c o DESY Notkestr 85 22607 Hamburg Germany

Faculty of Electrical Engineering and Informatics Technical University of Košice Letná 9 04200 Košice Slovakia

Helmholtz Zentrum Hereon Max Planck Str 1 Geesthacht 21502 Germany

IKERBASQUE Basque Foundation for Science 48013 Bilbao Spain

Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia

Regional Centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute Palacky University Slechtitelu 27 783 71 Olomouc Czech Republic

Taras Shevchenko National University of Kyiv 64 13 Volodymyrs'ka Str Kyiv 01601 Ukraine

Citace poskytuje Crossref.org

Magneto-Responsive Textiles for Non-Invasive Heating

Multifunctional Electrospun Nanofibers Based on Biopolymer Blends and Magnetic Tubular Halloysite for Medical Applications