Physicochemical properties of TIO2, ZrO2, Fe3O4 nanocrystalline adsorbents and photocatalysts

Dontsova, Tetiana; Kyrii, Svitlana; Yanushevska, Olena; Suprunchuk, V. I.; Kosogina, Iryna

doi:10.1007/s11696-022-02433-4

Cited by 7 publications

(3 citation statements)

References 74 publications

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“…The comparison of membrane technologies with other purification processes such as coagulation (Girish et al 2023;Kyrii et al 2020), adsorption Kyrii et al 2023;Dontsova et al 2022), photocatalysis (Kutuzova et al 2022;Ge et al 2021) and others (Alkhadra et al 2022;Grzegorzek et al 2023) show their greater versatility, which can be successfully applied to solve problems of any complexity, not only in the field of water treatment, but also, for example, in separation processes (Alardhi et al 2023), extraction of valuable components from liquid media (Siagian et al 2023), purification and reuse of rainwater (Liu et al 2021), and solving problems in the food industry (Suliman et al 2023).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

Molchan,

Vorobyova,

Vasyliev

et al. 2024

Preprint

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The article is devoted to the synthesis of ceramic membranes based on silicon carbide and the study of their mechanical, electrical, and antibacterial properties. SiC-based ceramic membranes have a few advantages, namely high surface hydrophilicity, good water permeability and negative surface charge, which leads to better performance during their operation. The effect of carbonate type and addition of liquid glass on the physicochemical properties of ceramic membranes was investigated using diffraction analysis and scanning electron microscopy. It was found that regardless of the carbonate type, only two phases can be identified: the main phase in the original mixture is silicon carbide and an additional phase added to the mixture is corundum. The transport properties obtained (9.03–18.66 cm3/(min·cm2)), and the results of electron microscopy indicate the macroporosity of ceramic membranes based on silicon carbide (13–20 µm). Ceramic membranes of high strength (16.3–46.8 MPa) were obtained. Studies on antibacterial properties have shown that SiC-based ceramic membranes do not exhibit antibacterial properties. The additional modification of ceramic membranes with titanium oxide has given ceramic membranes based on silicon carbide antibacterial properties, as evidenced by the inhibition of the growth of gram-negative bacteria, the effectiveness of which depends on the number of selective layers based on TiO2 applied. The results of this study are useful to enrich the knowledge of the production of silicon carbide membranes and are aimed at the future research and development of selective membranes (micro- and ultrafiltration) based on them.

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Section: Introductionmentioning

confidence: 99%

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

Molchan,

Vorobyova,

Vasyliev

et al. 2024

Preprint

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“…During these years of research on synthesizing titanium oxide nanoparticles, the sol–gel, − hydrothermal method, − and chemical vapor and liquid phase deposition , were most often used. , However, the sol–gel and hydrothermal methods have been identified as the most common and are simple to implement. The hydrothermal method is a relatively inexpensive method that ensures high purity and size uniformity of the synthesized one-dimensional TiO 2 nanostructures. − The process of crystallization of the substance occurs inside a Teflon or polypropylene autoclave and a stainless-steel vessel, which is stored at a temperature above 100 °C and a pressure of more than 1 atm. Compared with some synthesis methods (e.g., sol–gel), the hydrothermal approaches can significantly reduce the synthesis time.…”

Section: Introductionmentioning

confidence: 99%

TiO₂ Phase Ratio’s Contribution to the Photocatalytic Activity

Stepanova,

Tite,

Ivanenko

et al. 2023

ACS Omega

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Photocatalysis is one of the approaches for solving environmental issues derived from extremely harmful pollution caused by industrial dyes, medicine, and heavy metals. Titanium dioxide is among the most promising photocatalytic semiconductors; thus, in this work, TiO 2 powders were prepared by a hydrothermal synthesis using titanium tetrachloride TiCl 4 as a Ti source. The effect of the hydrochloric acid (HCl) concentration on TiO 2 formation was analyzed, in which a thorough morphostructural analysis was performed employing different analysis methods like XRD, Raman spectroscopy, SEM/TEM, and N 2 physisorption. EPR spectroscopy was employed to characterize the paramagnetic defect centers and the photogeneration of reactive oxygen species. Photocatalytic properties were tested by photocatalytic degradation of the rhodamine B (RhB) dye under UV light irradiation and using a solar simulator. The pH value directly influenced the formation of the TiO 2 phases; for less acidic conditions, the anatase phase of TiO 2 crystallized, with a crystallite size of ≈9 nm. Promising results were observed for TiO 2 , which contained 76% rutile, showing a 96% degradation of RhB under the solar simulator and 91% under UV light after 90 min irradiation, and the best result showed that the sample with 67% of the anatase phase after 60 min irradiation under the solar simulator had a 99% degradation efficiency.

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“…Very often, metal oxides such as titanium dioxide (TiO 2 ), zirconium dioxide (ZrO 2 ), alumina (Al 2 O 3 ), silica (SiO 2 ), etc., are used as materials for the selective layer [13][14][15][16]. Titanium dioxide (TiO 2 ) is known for its strong photocatalytic properties, chemical inertness, and good thermal stability [17][18][19]. When used as the selective layer on ceramic membranes, TiO 2 can impart self-cleaning capabilities to the membrane surface due to its photocatalytic properties, and it can also enhance anti-fouling properties, making the membrane more resistant to contaminants [20].…”

Section: Introductionmentioning

confidence: 99%

Physico-chemical characterisation of selective TiO2 layer on kaolin-based ceramic membranes

Kyrii,

Misevych,

Romaniuk

et al. 2023

Preprint

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The selective layer in a ceramic membrane is crucial for separation and filtration processes, as it endows the membrane with specific properties and functions, determining its selectivity and suitability for various applications. This study aimed to investigate the impact of the type of composition used to create a selective layer on low-cost clay ceramic membranes and to determine their physicochemical properties and permeability. In this study, a ceramic membrane substrate based on kaolin was synthesized and characterized using XRD, thermal analysis, and IR spectroscopy, and its mechanical properties were also tested. Selective layers on the ceramic membrane were synthesized with various compositions using spin-coating. They were characterized using IR spectroscopy, diffuse reflectance absorption spectrum, and scanning electron microscopy (SEM). The SEM images of all samples show a dense structure typical of clay materials. These images indicate that the composition and number of layers have minimal impact on the morphology in this case. The obtained ceramic membranes are characterized by a pore size ranging from 50 – 200 μm. The permeability of the ceramic membrane support is 40 cm3/min·cm2, which decreases with the application of selective layers. Selectivity by turbidity increases from 32% to 66.4%.

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Physicochemical properties of TIO2, ZrO2, Fe3O4 nanocrystalline adsorbents and photocatalysts

Cited by 7 publications

References 74 publications

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

TiO₂ Phase Ratio’s Contribution to the Photocatalytic Activity

Physico-chemical characterisation of selective TiO2 layer on kaolin-based ceramic membranes

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Physicochemical properties of TIO2, ZrO2, Fe3O4 nanocrystalline adsorbents and photocatalysts

Cited by 7 publications

References 74 publications

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

Physicochemical and Antibacterial Properties of Ceramic Membranes Based on Silicon Carbide

TiO2 Phase Ratio’s Contribution to the Photocatalytic Activity

Physico-chemical characterisation of selective TiO2 layer on kaolin-based ceramic membranes

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Product

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TiO₂ Phase Ratio’s Contribution to the Photocatalytic Activity