Pyrolized Diatomaceous Biomass Doped with Epitaxially Growing Hybrid Ag/TiO2 Nanoparticles: Synthesis, Characterisation and Antibacterial Application
Brzozowska W. Wojtczak I. Railean V. Bekissanova Z. Trykowski G. Buszewski B. Sprynskyy M.
June 2023MDPI
Materials
2023#16Issue 12
In the pursuit of innovative solutions for modern technologies, particularly in the design and production of new micro/nanostructured materials, microorganisms acting as “natural microtechnologists” can serve as a valuable source of inspiration. This research focuses on harnessing the capabilities of unicellular algae (diatoms) to synthesize hybrid composites composed of AgNPs/TiO2NPs/pyrolyzed diatomaceous biomass (AgNPs/TiO2NPs/DBP). The composites were consistently fabricated through metabolic (biosynthesis) doping of diatom cells with titanium, pyrolysis of the doped diatomaceous biomass, and chemical doping of the pyrolyzed biomass with silver. To characterize the synthesized composites, their elemental and mineral composition, structure, morphology, and photoluminescent properties were analysed using techniques such as X-ray diffraction, scanning and transmission electron microscopy, and fluorescence spectroscopy. The study revealed the epitaxial growth of Ag/TiO2 nanoparticles on the surface of pyrolyzed diatom cells. The antimicrobial potential of the synthesized composites was evaluated using the minimum inhibitory concentration (MIC) method against prevalent drug-resistant microorganisms, including Staphylococcus aureus, Klebsiella pneumonia, and Escherichia coli, both from laboratory cultures and clinical isolates.
antibacterial activity , biosynthesis , diatom biomass , epitaxial Ag/TiO2 nanoparticles , epitaxial growths , hybrid nanostructures , photoluminescence properties
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Institute of Marine and Environmental Sciences, Doctoral School, University of Szczecin, Mickiewicza 16, Szczecin, 70-383, Poland
Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University in Torun, 7 Gagarina Str, Torun, 87-100, Poland
Department of Infectious, Invasive Diseases and Veterinary Administration, Institute of Veterinary Medicine, Nicolaus Copernicus University in Torun, Gagarina 7, Torun, 87-100, Poland
Interdisciplinary Center for Modern Technologies, Nicolaus Copernicus University in Torun, Wilenska 4, Torun, 87-100, Poland
Faculty of Chemistry and Chemical Technology, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Center of Physical-Chemical Methods of Research and Analysis, Almaty, 050012, Kazakhstan
Faculty of Chemistry, Nicolaus Copernicus University in Torun, Gagarina 7, Torun, 87-100, Poland
Institute of Marine and Environmental Sciences
Department of Environmental Chemistry and Bioanalytics
Department of Infectious
Interdisciplinary Center for Modern Technologies
Faculty of Chemistry and Chemical Technology
Center of Physical-Chemical Methods of Research and Analysis
Faculty of Chemistry
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