Biogenic silicon dioxide nanoparticles processed from natural sources

Adach, Kinga; Kroisová, Dora; Fijalkowski, Mateusz

doi:10.1080/02726351.2020.1758857

Cited by 8 publications

(10 citation statements)

References 33 publications

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“…In the following step, the white silica powder was dried in a laboratory heating oven at 100 °C for 12 h. Anhydrous ethanol, hydrochloric acid, nitric acid (Penta Chemicals, Prague, Czech republic), and deionized filtered water were used in all purification processes in this study. The yield of the prepared extraction was around 15% [ 40 ].…”

Section: Methodsmentioning

confidence: 99%

Are Biogenic and Pyrogenic Mesoporous SiO2 Nanoparticles Safe for Normal Cells?

et al. 2021

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Silicon dioxide, in the form of nanoparticles, possesses unique physicochemical properties (size, shape, and a large surface to volume ratio). Therefore, it is one of the most promising materials used in biomedicine. In this paper, we compare the biological effects of both mesoporous silica nanoparticles extracted from Urtica dioica L. and pyrogenic material. Both SEM and TEM investigations confirmed the size range of tested nanoparticles was between 6 and 20 nanometers and their amorphous structure. The cytotoxic activity of the compounds and intracellular ROS were determined in relation to cells HMEC-1 and erythrocytes. The cytotoxic effects of SiO2 NPs were determined after exposure to different concentrations and three periods of incubation. The same effects for endothelial cells were tested under the same range of concentrations but after 2 and 24 h of exposure to erythrocytes. The cell viability was measured using spectrophotometric and fluorimetric assays, and the impact of the nanoparticles on the level of intracellular ROS. The obtained results indicated that bioSiO2 NPs, present higher toxicity than pyrogenic NPs and have a higher influence on ROS production. Mesoporous silica nanoparticles show good hemocompatibility but after a 24 h incubation of erythrocytes with silica, the increase in hemolysis process, the decrease in osmotic resistance of red blood cells, and shape of erythrocytes changed were observed.

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Section: Methodsmentioning

confidence: 99%

Are Biogenic and Pyrogenic Mesoporous SiO2 Nanoparticles Safe for Normal Cells?

et al. 2021

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“…Silicon dioxide has numerous applications. It is used as a filler for concrete [ 6 ], in the pharmaceutical industry, as a catalyst or in medicine as a drug delivery agent [ 7 ]. Silicon dioxide can also increase bone density and help with the regeneration of certain tissues [ 1 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, silica can be used as a strengthening agent in some crops [ 11 ], and because of that, some plants might be a great source of silicon dioxide with a nanometer scale and much more ecological than older methods [ 6 ]. Such silica has a big surface area, that can reach up to several hundred square meters per gram [ 7 ]. However, silica gained in this way has irregular shapes [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…Horsetail is a vascular plant. The content of silica in Equisteum may differ by its origin [ 7 ]. Other substances appearing in Horsetail are proteins, lipids, cellulose, metal ions like potassium, calcium, sodium and aluminum [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Other substances appearing in Horsetail are proteins, lipids, cellulose, metal ions like potassium, calcium, sodium and aluminum [ 12 ]. Characteristics of biogenic silica strongly depend on processing and pre-treatment of the crop [ 7 ]. It can be found in Asia, North America and also in Europe [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Natural Rubber Biocomposites Filled with Phyto-Ashes Rich in Biogenic Silica Obtained from Wheat Straw and Field Horsetail

et al. 2021

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The rich structural hierarchy of plants permits the obtainment of porous structures which can be expected to show improved performances in fields such as pharmaceuticals and cosmetics, catalysis, drug delivery, adsorption, separation or sensors in various chemical reactions. On the other hand, porous materials can be an active additive to polymer composites. The aim of the study was to obtain natural rubber (NR) biocomposites with the addition of phyto-ashes reach in biogenic silica from plant biomass. For the production of bioadditives, a two-stage method of high-temperature heat treatment was used, preceded by acid hydrolysis of plant tissues in the form of horsetail and wheat straw. Hydrolysis was performed with hydrochloric and citric acid. The efficiency of the processes and their influence on the elemental composition, surface morphology, thermal stability and particle size of the fillers were determined. Modified bioadditives were introduced into the elastomer matrix and their processing properties, as well as the vulcanization characteristics, were examined. Static mechanical properties (tensile strength, elongation at break, stress at 100%, 200% and 300% elongation), dynamic-mechanical analysis and the influence of additives on the cross-link density of the composites were determined. Structural analysis was performed using scanning electron microscopy. It was found that the field horsetail and cereal straw are plants rich in many valuable chemical compounds, especially silica. The specific and appropriate treatment of these plants can lead to bioadditives that significantly affect the properties of rubber materials.

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