Elektrochemiczne sensory chloru i amoniaku

Promotor: Mieczysław Rękas.Niepublikowana praca doktorska.Tyt. z ekranu tyt.Praca doktorska. Akademia Górniczo-Hutnicza im. Stanisława Staszica (Kraków), Wydział Inżynierii Materiałowej i Ceramiki, 2013.Zawiera bibliogr.Dostępna również w wersji drukowanej.Tryb dostępu: Internet.parametry sensorów, przegląd literaturowy na temat chloru oraz sposobów jego detekcji i oznaczania, chlor oraz metody jego detekcji i oznaczania, szczegółowy przegląd literaturowy na temat potencjometrycznych sensorów chloru, szczegółowy przegląd literaturowy na temat konduktometrycznych sensorów chloru, sensor pojemnościowy, szczegółowy przegląd literaturowy na temat optochemicznych sensorów chloru ,sensor termojonowy (komercyjny), badania dotyczące sensora Pt œ La0,9Mg0,1OCl0,9 ˜ Pt, synteza LaOCl, domieszkowanie LaOCl magnezem, konstrukcja sensora, hipotetyczny mechanizm działania sensora, charakterystyki sensorowe, oddziaływanie ogniwa z tlenem, ogniwo stałe Pt œ LaOCl ˜ (8YSZ) œ Pt, konstrukcja ogniwa, wyniki pomiarów i hipotetyczny mechanizm działania ogniwa, potencjometryczne sensory z Nasiconem jako elektrolitem stałym, synteza Nasiconu, wynik badania składu fazowego metoda XRD, własności elektryczne materiału wyznaczone metoda EIS, konstrukcja sensora Pt ˜Nasiconœ Pt, charakterystyki sensorowe ogniwa Pt ˜Nasiconœ Pt, hipotetyczny mechanizm działania sensora Pt ˜Nasiconœ Pt, czasy odpowiedzi sensora Pt ˜Nasiconœ Pt, konstrukcja sensora RuO2-NaCl ˜Nasiconœ Pt, charakterystyki sensorowe ogniwa RuO2-NaCl ˜Nasiconœ Pt, hipotetyczny mechanizm działania sensora RuO2-NaCl ˜Nasiconœ Pt, badania dotyczące sensora zbudowanego z BiFeO3, synteza żelazianu bizmutu, badanie składu fazowego metoda XRD, mikrostruktura, badanie własności elektrycznych BiFeO3 metoda EIS, konstrukcja sensora Pt ˜BiFeO3œ Pt, charakterystyki sensorowe ogniwa Pt ˜BiFeO3œ Pt, hipotetyczny mechanizm działania sensora Pt ˜BiFeO3œ P

Voltammetric Determination of Anethole on La2O3/CPE and BDDE

In this work, DPV determination of anethole was presented using various carbon, two-diameter (1.5 and 3 mm) electrodes, that is, BDD, GC, CP, and CP doped by La2O3 and CeO2 nanoparticles. La2O3/CPE to our best knowledge was proposed first time. Cyclic voltammograms confirmed totally irreversible electrode electrooxidation process, controlled by diffusion, in which two electrons take part. The most satisfactory sensitivity 0.885 ± 0.016 µA/mg L−1 in 0.1 mol L−1 acetate buffer was obtained for La2O3/CPE with the correlation coefficient r of 0.9993, while for BDDE it was 0.135 ± 0.003 µA/mg L−1 with r of 0.9990. The lowest detection limit of 0.004 mg L−1 was reached on La2O3/CPE (3 mm), what may be compared with the most sensitive conjugate methods, but in the proposed approach, no sample preparation and analyte separation was needed. Anethole was successfully determined in specially prepared ethanol extracts of herbal mixtures of various compositions, which imitated real products. The proposed procedure was verified in analysis of commercial products, that is, anise essential oil, which contains a large concentration of anethole, and in alcohol drinks like Metaxa, Ouzo, and Rakija, in which the considered analyte occurs on trace levels. Structure and properties of the considered nanopowders and graphite pastes were investigated by EDX, SEM, and EIS

High-Entropy Perovskite Thin Film in the Gd-Nd-Sm-La-Y-Co System: Deposition, Structure and Optoelectronic Properties

Multicomponent equimolar perovskite oxides (ME-POs) have recently emerged as a highly promising class of materials with unique synergistic effects, making them well-suited for applications in such areas as photovoltaics and micro- and nanoelectronics. High-entropy perovskite oxide thin film in the (Gd0.2Nd0.2La0.2Sm0.2Y0.2)CoO3 (RECO, where RE = Gd0.2Nd0.2La0.2Sm0.2Y0.2, C = Co, and O = O3) system was synthesized via pulsed laser deposition. The crystalline growth in an amorphous fused quartz substrate and single-phase composition of the synthesized film was confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Surface conductivity and activation energy were determined using a novel technique implementing atomic force microscopy (AFM) in combination with current mapping. The optoelectronic properties of the deposited RECO thin film were characterized using UV/VIS spectroscopy. The energy gap and nature of optical transitions were calculated using the Inverse Logarithmic Derivative (ILD) and four-point resistance method, suggesting direct allowed transitions with altered dispersions. The narrow energy gap of RECO, along with its relatively high absorption properties in the visible spectrum, positions it as a promising candidate for further exploration in the domains of low-energy infrared optics and electrocatalysis