排序方式: 共有45条查询结果,搜索用时 296 毫秒
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Antoni W. Morawski Ewelina Kusiak-Nejman Jacek Przepiórski Roksana Kordala Juliusz Pernak 《Cellulose (London, England)》2013,20(3):1293-1300
TiO2/N-cellulose nanocomposite was successfully prepared in the (cyclohexyl)hexyl-dimethylammonium acetate–dimethyl sulfoxide solution. The obtained composite was characterized with various techniques like UV–Vis/DR, FTIR/DRS, X-ray diffraction, thermogravimetric analysis, DLS method and BET SSA measurements. TiO2/N-cellulose nanocomposite exhibited high UV–Vis light absorption with energy gap shifted to the visible region. Additive of TiO2/N photocatalyst to cellulose-IL-DMSO solution leads to obtaining the material with higher thermostability and limited photoactivity. 相似文献
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Domińska M Jackowska K Krysiński P Blanchard GJ 《The journal of physical chemistry. B》2005,109(33):15812-15821
We have synthesized and characterized a family of self-assembled monolayers containing pyrene derivatives on gold and indium-doped tin oxide (ITO) substrates. The covalently bound pyrene functionalities serve as either spectroscopic or electrochemical probes of their immediate environment, and we explore their electrochemical response in this paper. When these compounds are the only constituents bound to the interfaces, the molecules enjoy significant structural freedom. The addition of aliphatic adsorbates to the interfaces serves to place the pyrene derivatives in a more restricted environment. Cyclic voltammetry shows that the organization of a monolayer with pyrene derivatives, and the position of the terminal pyrene within such monolayer, depend sensitively on the length of the pyrene tether and the presence or absence of aliphatic interfacial species, as well as the identity of the substrate. 相似文献
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A. Bieguñki A. Frydrychewicz M. Osial K. Jackowska 《Russian Journal of Electrochemistry》2010,46(11):1297-1305
In this work we examined the electrochemical properties of poly(indole-5-carboxylic acid), PIn5COOH. The polymer was produced by electrochemical polymerisation using cyclic voltammetry (CV). It was shown that PIn5COOH is electroactive in aqueous solutions showing two redox processes in acidic solution and one redox process in solutions
with pH > 4. The oxidation of catechol (CT) on Pt/In5COOH modified electrodes was investigated by cyclic voltammetry (CV) and rotating disc electrode (RDE) voltammetry. It was
established that CT was oxidised only after the oxidation of polymer film was initiated and that polymer significantly enhanced
the oxidation and reduction peak currents in comparison with bare Pt electrode. The variation of peak currents (i
pa, i
pc) as a function of CT concentration was found to be linear up to 6 mM. Experiments with a rotating disk electrode show that
the oxidation reaction of catechol occures not only at the polymer/electrolyte interface but also in the polymer film. 相似文献
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Roksana Kordala-Markiewicz Hubert Rodak Bartosz Markiewicz Filip Walkiewicz Agata Sznajdrowska Katarzyna Materna Katarzyna Marcinkowska Tadeusz Praczyk Juliusz Pernak 《Tetrahedron》2014
Ammonium ionic liquids with the 4-chloro-2-methylphenoxyacetate anion were synthesized and characterized. Physicochemical properties, such as thermal stability, phase transition temperatures, viscosity, density, refractive index, as well as surface activity and herbicidal activity were determined. Improved physicochemical properties suggest a reduced environmental impact of newly formed group of herbicidal ionic liquids (HILs). HILs with a longer substituent can be characterized with better herbicidal activity in comparison with commercial products. 相似文献
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Anna Frydrychewicz Aleksander T. Bieguński Krystyna Jackowska Galina A. Tsirlina 《Journal of Solid State Electrochemistry》2008,12(9):1085-1091
Polycarbonate (PC) membranes of different porosity (from 50 nm to 400 nm pore size) were used as separators in a thin layer
cell for palladium electrodeposition. Atomic force microscopy (AFM) confirmed the formation of Pd layer between the cathode
and porous membrane, with subsequent growth inside the pores induced by space limitations of further growth of initial layer.
Our estimates confirm that at this stage Pd deposit feels the pronounced mechanical pressure and consider it as a possible
reason of specific hydrogen sorption behaviour in the region of β-phase hydride formation. Up to c.a. 1.0 H/Pd atomic ratio
is observed for some samples. We consider possible (nano)structural peculiarities responsible for this behaviour. 相似文献
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