Mesoporous halloysite/magnetite composite: Synthesis, characterization and in vitro evaluation of the effect on the bacteria viability. (August 2022)

• Record Type: Journal Article
• Authors: Alekseeva, Olga V.; Smirnova, Daria N.; Noskov, Andrew V.; Kuznetsov, Oleg Yu.; Kirilenko, Marina A.; Agafonov, Alexander V.
• Is Part Of: Materials today communications. Volume 32(2022)
• Publication Date: 2022-08
• Subjects: Halloysite/magnetite composite -- Structure and surface morphology -- Fractal -- Biological activity -- E. coli; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2022.103877
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: Halloysite/magnetite composite material was synthesized by the chemical coprecipitation of iron salts in halloysite pores. Halloysite, magnetite and halloysite/magnetite samples were characterized by a number of physicochemical methods. According to X-ray diffraction analysis, data of SEM and TEM, magnetic nanoparticles were embedded in the clay mineral matrix. Using the nitrogen adsorption-desorption technique it was found that powders under study can be attributed to mesoporous bodies with a small fraction of macropores. For the first time, fractal models were used to describe the porosity of the studied materials. The values of the fractal dimension (as a quantitative characteristic of inhomogeneity) were found in the range of 2.5–3. Infrared spectrometry indicated a formation of the hydrogen bonds between the oxygen-containing groups of magnetite and halloysite. The biological activity of halloysite and the halloysite/magnetite composite was investigated and it was found that in the presence of these powders, the viability of E. coli M-17 bacteria increased 2–3 times in comparison with the control sample. Graphical Abstract: ga1