Temat: catalytic properties - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Photosensitization of TiO2 P25 with CdS Nanoparticles for Photocatalytic Applications
Autorzy:: Trenczek-Zając, A.
Banaś, J.
Świerczek, K.
Zazakowny, K.
Radecka, M.
Powiązania:: https://bibliotekanauki.pl/articles/352507.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: semiconductors
X-ray diffraction
transmission electron microscopy TEM
catalytic properties
optical properties
Opis:: A TiO₂/CdS coupled system was prepared by mixing the TiO₂ P25 with CdS synthesized by means of the precipitation method. It was found that the specific surface area (SSA) of both components is extremely different and equals 49.5 for TiO₂ and 145.4 m²·g^-1 for CdS. The comparison of particle size distribution and images obtained by means of transmission electron microscopy (TEM) showed agglomeration of nanocomposites. X-ray diffraction (XRD) patterns suggest that CdS crystallizes in a mixture of cubic and hexagonal phases. Optical reflectance spectra revealed a gradual shift of the fundamental absorption edge towards longer wavelengths with increasing CdS molar fraction, which indicates an extension of the absorption spectrum of TiO₂. The photocatalytic activity in UV and UV-vis was tested with the use of methyl orange (MO). The Langmuir–Hinshelwood model described well the photodegradation process of MO. The results showed that the photocatalytic behaviour of the TiO₂/CdS mixture is significantly better than that of pure nanopowders.
Źródło:: Archives of Metallurgy and Materials; 2017, 62, 2A; 841-849
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Właściwości katalityczne i biomedyczne związków zawierających jony rutenu (II) oraz Rutenu (III)
Catalytic and biomedical properties of compound containing ruthenium (II) and ruthenium (III) ions
Autorzy:: Pobłocki, Kacper
Pawlak, Marta
Walczak, Juliusz
Drzeżdżon, Joanna
Jacewicz, Dagmara Elżbieta
Powiązania:: https://bibliotekanauki.pl/articles/27310039.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: związki kompleksowe Ru(II)
związki kompleksowe Ru(III)
właściwości biomedyczne
właściwości katalityczne
Ru(II) complex compounds
Ru(III) complex compounds
biomedical properties
catalytic properties
Opis:: Ruthenium complexes appear in scientific publications mainly as catalysts in the olefins metathesis process. In this review, we want to indicate the research niche regarding the use of ruthenium(II) and ruthenium(III) complexes in other catalytic processes, i.e. polymerization or epoxidation of olefins and depolymerization. We would like to combine the catalytic properties of ruthenium(II,III) complex compounds with their biomedical activity due to the growing problem of drug resistance (including antibiotic resistance). Scientists have been designing new metallopharmaceuticals exhibiting biological activity for several years, therefore this requires a critical review of the literature. The main goal of designing new metallodrugs is to create compounds with new or stronger biological properties compared to free ligands. Ruthenium compounds are considered potential substitutes for known drugs. In particular, Ru(II) and Ru(III) based complexes have reduced toxicity and can be tolerated in vivo. In addition, a wide spectrum of ruthenium oxidation states, a different mechanism of action and the kinetics of ligand substitution increase the advantage over coordination complex compounds based on platinum. In conclusion, in this review, we will focus on the latest reports from the literature on the catalytic properties and biomedical activity of ruthenium(II) and ruthenium(III) chemical compounds.
Źródło:: Wiadomości Chemiczne; 2023, 77, 5-6; 569--595
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Use of MgO to Promote the Oxyethylation Reaction of Lauryl Alcohol
Autorzy:: Pilarska, A.
Lukosek, M.
Siwińska-Stefańska, K.
Pilarski, K.
Jesionowski, T.
Powiązania:: https://bibliotekanauki.pl/articles/779641.pdf
Data publikacji:: 2014
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: magnesium hydroxide and oxide
precipitation
dispersive and structural properties
oxyethylation
catalytic activity
Opis:: Synthesis of magnesium hydroxide was performed by the precipitation method with the use of magnesium sulfate and sodium hydroxide. The infiuence of temperature and ratio of reagents was studied. Magnesium hydroxides, and the magnesium oxides obtained from them by thermal decomposition, were analyzed to determine their bulk density, polydispersity and particle size. The magnesium oxide with the largest surface area was tested as a catalyst in the oxyethylation of lauryl alcohol, and shown to be selective but poorly reactive in comparison with commercially available catalysts. Further studies are needed to improve its reactivity.
Źródło:: Polish Journal of Chemical Technology; 2014, 16, 2; 36-42
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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