Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Rhodamine B" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-10 z 12
Tytuł:
Thermodynamics and adsorption studies of dye (rhodamine-b) onto natural diatomite
Autorzy:
Koyuncu, M.
Kul, A. R.
Powiązania:
https://bibliotekanauki.pl/articles/110287.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
diatomite
rhodamine B
adsorption
thermodynamics
Langmuir isotherm
Freundlich isotherm
Opis:
Thermodynamics and adsorption studies were conducted with a dye of rhodamine-B on natural diatomite. Adsorption of the dye was investigated with an initial dye concentration at pH 8±0.2, 303, 313 and 323 K. The adsorption experiments were carried out isothermally at three different temperatures. The Langmuir and Freundlich isotherm models were used to describe the equilibrium data and the results were discussed in details. The kinetic data agreed with the pseudo-first order model with rate constants (k2) in the range of 3.05–1.59.10–1 g/mg min. The thermodynamic parameters such as standard free energy, entropy change and enthalpy were calculated for natural diatomite. These values showed that adsorption of rhodamine-B on natural diatomite was a spontaneous and endothermic process.
Źródło:
Physicochemical Problems of Mineral Processing; 2014, 50, 2; 631-643
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Excitation Energy Transport between the Ionic Forms of Rhodamine B in Viscous Solutions
Autorzy:
Bojarski, P.
Kułak, L.
Powiązania:
https://bibliotekanauki.pl/articles/1992720.pdf
Data publikacji:
1998-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.15.-p
33.50.-j
Opis:
Excitation energy transport between zwitterion and cationic form of rhodamine B in glycerol-ethanol mixture is studied. Concentration course of the quantum yield exhibits a rapid drop at intermediate concentrations, where no dimers are formed contrary to the results of measurements carried out for solutions with a trace amount of acid or base in which single ionic forms are adopted. To describe properly such concentration behavior of the quantum yield forward and reverse, nonradiative excitation energy transport between the forms is considered. This task is performed by comparing experimental data with Monte-Carlo simulations.
Źródło:
Acta Physica Polonica A; 1998, 94, 5-6; 725-734
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heterogeneous photocatalytic removal and reaction kinetics of Rhodamine-B dye with Au loaded TiO2 nanohybrid catalysts
Autorzy:
Zhang, D.
Powiązania:
https://bibliotekanauki.pl/articles/779739.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
rozpad kinetyczny
rodamina B
katalizator Au/TiO2
Au/TiO2 catalyst
rhodamine B
decompose kinetics
Opis:
Heterogeneous photocatalytic removal of Rhodamine-B (RhB) dye by metallic Au nanopatrticles deposited TiO2 photocatalyst was studied. For this study, a chemical reduction method by hydrazine hydrate for gold deposition was employed in order to synthesize Au/TiO2 nanocomposite system. For the characterization of the synthesized nanomaterials, X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS), the Fourier transformation infrared spectroscopy (FTIR) and photoluminescence spectroscopy (PLS) techniques were performed. The obtained results show that the deposition of gold onto TiO2 surface could effectively inhibit the recombination of the photoinduced electron and holes, improving the absorption capability for the visible light source and leading to the increased surface OH group density. The degradation experiment reveals that the efficiency of color removal from RhB aqueous solution containing Au/TiO2 powders for the photocatalytic bleaching of RhB dye is more efficient than that of bare TiO2 sample upon UV-vis light activation. In addition, degradation kinetics of RhB dye in aqueous suspensions can be well simulated by the Langmuir-Hinshelwood model and obeys the pseudo-first order law, with a decolorization rate of 0.0252 min-1 to the photocatalytic removal of RhB dye.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 2; 42-48
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of Rhodamine B from aqueous solution by ZnFe2O4 nanocomposite with magnetic separation performance
Autorzy:
Konicki, W.
Siber, D.
Narkiewicz, U.
Powiązania:
https://bibliotekanauki.pl/articles/779010.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
adsorption
Rhodamine B
ZnFe2O4
kinetics
thermodynamics
Opis:
Magnetic ZnFe2 O4  nanocomposite (ZnFe-NC) was used as an adsorbent for the removal of Rhodamine B (RB) from aqueous solution. The synthesized nanocomposite was characterized by XRD, SEM, HRTEM, BET and FTIR. The effects of various parameters such as initial RB concentration (5–25 mg L−1 ), pH (3.4–11.1) and temperature (20–60°C) were investigated. The adsorption capacity at equilibrium increased from 5.02 to 9.83 mg g−1 , with the increase in the initial concentration of RB from 5 to 25 mg L−1  at pH 7.0 and at 20°C. The experimental results indicated that the maximum RB removal could be attained at a solution pH of 4.4 and the adsorption capacity obtained was 6.02 mg g−1 . Kinetic adsorption data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order model and the intraparticle diffusion model. The adsorption kinetics well fitted using a pseudo-second-order kinetic model. The experimental isotherm data were analyzed using two isotherm models, namely, Langmuir and Freundlich. The results revealed that the adsorption behavior of the RB onto ZnFe-NC fitted well with the Langmuir isotherm model. In addition, various thermodynamic parameters, such as standard Gibbs free energy (ΔG°), enthalpy (ΔH°) and entropy (ΔS°) have been calculated.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 4; 65-74
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis, characterization of Hollandite Ag2Mn8O16 on TiO2 nanotubes and their photocatalytic properties for Rhodamine B degradation
Autorzy:
Thabit, M.
Liu, H.
Zhang, J.
Wang, B.
Powiązania:
https://bibliotekanauki.pl/articles/779645.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Ag-MnO2/TiO2
Ag2Mn8O16
nanotubes
nanocrystals
Photoelectrode
electrochemical deposition
Rhodamine B
Photo-catalytic efficiency
Opis:
In this research Ag2 Mn8 O16  nanocrysls/TiO2 nanotubes, photoelectrodes were successfully prepared through anodization and annihilation steps, followed by electrodeposition of MnO2  and Ag in a three electrodes cell. The obtained photoelectrodes were dried, then annealed for crystallization, the morphology and structure of the fabricated electrodes were characterized via scanning electron microscopy (SEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The light absorption and harvesting properties were investigated through UV–visible diffuse refl ectance spectrum (DRS), photocatalytic performances were evaluated by degradation of 50 mL of Rhodamine B (5 mg L–1 ) under Xenon light irradiation for 2 h. Results illustrated that the fabricated photoelectrodes show remarkable photo-degradation properties of organic pollutants in aqueous mediums.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 2; 85-91
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving the Performance of Mg/Cr LDH by Forming Metal Oxides Mg/Cr-Ni Using Coprecipitation Method as Adsorbent for Cationic Dyes
Autorzy:
Yuliasari, Nova
Badri, Arini Fousty
Siregar, Patimah Mega Syah Bahar Nur
Palapa, Neza Rahayu
Mardiyanto
Mohadi, Risfidian
Lesbani, Aldes
Powiązania:
https://bibliotekanauki.pl/articles/2105268.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
adsorption
metal oxide
rhodamine B
methylene blue
regeneration
Opis:
This study aimed to determine the adsorption capacity of rhodamine-B (Rh-B) and methylene blue (MB) on Mg/Cr-Ni adsorbents. The Mg/Cr-Ni adsorbent was synthesized by the coprecipitation method. The results of the characterization of Mg/Cr-Ni using XRD analysis showed the formation of oxides at an angle of 2θ = 31.726°, 33°, and 45.44°. The surface area of Mg/Cr-Ni is 23.139 m2/g. The adsorption capacity test for Mg/Cr-Ni for Rh-B and MB were 85.470 mg/g and 166.667 mg/g, respectively. The adsorption kinetics model followed the pseudo second order (PSO). The adsorption process is endothermic and occurs spontaneously at any temperature. Mg/CrNi showed stability in the adsorption process of Rh-B and MB for 5 regeneration cycles.
Źródło:
Journal of Ecological Engineering; 2022, 23, 6; 67--74
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ammonium-Assisted Intercalation of Java Bentonite as Effective of Cationic Dye Removal
Autorzy:
Hakim, Yusuf Mathiinul
Mohadi, Risfidian
Mardiyanto
Royani, Idha
Powiązania:
https://bibliotekanauki.pl/articles/2202358.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bentonite intercalation
ammonium intercalant
adsorption
rhodamine B
methylene blue
Opis:
Modification of Java bentonite assists by the multi-step intercalation of sodium and ammonium ions under low-temperature preparation. The adsorbent was examined to remove rhodamine B and methylene blue dyes in an aqueous solvent. The analysis of structural changes conducted by XRD analysis showed the peak shifting from 19.89° to 16.1° and specific peak spectra FTIR of 2846.93 cm-1 due to increase basal spacing from ammonium intercalation. The total capacities of NH-bentonite, Na-bentonite, and Natural Bentonite adsorption to rhodamine B were 192.308 mg/g, 136.936 mg/g, and 116.279 mg/g, respectively, under acidic conditions. Furthermore, the total capacities of NH-bentonite, Na-bentonite, and Natural Bentonite adsorption to methylene blue were 270.27 mg/g, 158.73 mg/g, and 136.986 mg/g, respectively, under alkaline conditions. The adsorption mechanism described that the rhodamine B and methylene blue removal occurred endothermically, was feasible, and adhered to the kinetics model of pseudo-second-order and Langmuir isotherm. It concluded that the modified Java Bentonite from multi-step intercalation is affordable and effective as wastewater treatment.
Źródło:
Journal of Ecological Engineering; 2023, 24, 2; 184--195
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie stabilności barwnych znaczników fluorescencyjnych w silnie zasiarczonych wodach złożowych
Study on the stability of colored fluorescent tracers in highly sulfated reservoir waters
Autorzy:
Wojtowicz, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2143540.pdf
Data publikacji:
2021
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
znacznik
fluoresceina
eozyna Y
rodamina B
uranina
tracer
fluorescein
eosin yellowish
rhodamine B
uranine
Opis:
W artykule zostały przedstawione zagadnienia związane z oznaczaniem barwnych znaczników fluorescencyjnych, takich jak fluoresceina, eozyna żółtawa, rodamina B i uranina, w wodach złożowych metodą spektrofotometryczną. W tym celu sprawdzono wpływ pH roztworu na widma absorpcji badanych znaczników. Otrzymane wyniki wykazały, że fluoresceina, rodamina B i uranina są wrażliwe na zmianę odczynu roztworu, dlatego w dalszych badaniach wskazane jest stosowanie stabilnych roztworów znaczników oraz kontrola i ewentualna korekta pH. W ramach badań wykreślono krzywe kalibracyjne fluoresceiny, eozyny żółtawej, rodaminy B i uraniny w wodzie destylowanej, wodzie złożowej A4 i silnie zasiarczonych wodach złożowych A5 i A6 oraz przeprowadzono walidację metody analitycznej. Walidacja ta obejmowała wyznaczenie liniowości, odchylenia standardowego i względnego odchylenia standardowego badanych znaczników. Wysokie wartości współczynników regresji (0,9927–0,9998) analizowanych znaczników świadczą o dobrym dopasowaniu liniowym, natomiast niskie wartości odchylenia standardowego i względnego odchylenia standardowego – o powtarzalności i precyzji metody. Szczególną uwagę zwrócono na badania trwałości barwnych znaczników fluorescencyjnych w silnie zasiarczonych wodach złożowych. W tym celu sporządzono roztwory badanych znaczników o stężeniu 10 mg/dm3 w wodzie destylowanej, wodzie złożowej A4 i silnie zasiarczonych wodach złożowych A5 i A6. Pomiar stężenia znaczników w badanych wodach wykonywano co 2 dni przez okres 1 miesiąca. Uzyskane wyniki badań wykazały, że roztwory fluoresceiny, eozyny żółtawej, rodaminy B i uraniny są stabilne w wodzie destylowanej i wodzie złożowej A4, natomiast w wodach złożowych A5 i A6 ulegają degradacji. Najbardziej wrażliwe okazały się fluoresceina i jej pochodna uranina, które w wodzie złożowej A6 uległy całkowitej degradacji po 20 (fluoresceina) i 22 (uranina) dniach. Nieznacznie bardziej trwałe w silnie zasiarczonych wodach złożowych okazały się eozyna żółtawa i rodamina B, które w wodzie złożowej A6 uległy całkowitej degradacji po 24 dniach.
The article presents the issues related to the determination of colored fluorescent tracers such as fluorescein, eosin yellowish, rhodamine B and uranine in reservoir waters by spectrophotometric method. For this purpose, the influence of the pH of the solution on the absorption spectra of the tested tracers was checked. Test results show that fluorescein, rhodamine B and uranine are sensitive to changes in the buffer pH, therefore it is advisable to use stable tracer solutions as well as to control and possibly correct pH in further tests. As part of the study, calibration curves of fluorescein, eosin yellowish, rhodamine B and uranine in distilled water, reservoir water A4 and highly sulfated reservoir waters A5 and A6 were plotted and the analytical methods were validated. Analytical validation included determination of linearity, standard deviation and relative standard deviation of the tested tracers solutions. High values of the regression parameters (0.9927– 0.9998) of the analyzed tracers prove a good linear fit, while low values of standard deviation and relative standard deviation prove its repeatability and precision. Particular attention was paid to testing the stability of colored fluorescent tracers in highly sulfated reservoir waters. For this purpose, solutions of the tested tracers were prepared at concentrations of 10 mg/dm3 in distilled water, A4 reservoir water and highly sulfated A5 and A6 reservoir waters. Measurements of the tested tracers in the prepared solutions were performed every 2 days over the period of 1 month. The test results show that fluorescein, eosin yellowish, rhodamine B and uranine solutions are stable in the distilled water and A4 reservoir water, while they degrade in the A5 and A6 reservoir waters. Fluorescein and uranine turned out to be the most sensitive, as they degraded completely in the A6 reservoir water after 20 (fluorescein) and 22 (uranine) days. Yellowish eosin and rhodamine B turned out to be slightly more stable in highly sulfated reservoir waters, as they degraded completely in the A6 reservoir water after 24 days.
Źródło:
Nafta-Gaz; 2021, 77, 2; 82-91
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of Titanium dioxide nanotube photo-electrodes in different electrolyte mixtures and the impacts on their characteristics and photo-catalytic abilities under visible light
Autorzy:
Liu, M-T.
Zhang, J.
Wang, B.
Powiązania:
https://bibliotekanauki.pl/articles/780075.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
TiO2
anodizing
electrolytes
Nanotube arrays
photo-catalysis
water pollution
water treatments
Rhodamine B
Opis:
TiO2  nanotube arrays were fabricated using electrochemical anodization of titanium foils, where different types of electrolytes were tested to determine conceptual choice for nanotubes fabrication. These electrolytes are 1M (NH4)2SO4  containing 0.5% wt NH4F, 1M Na2SO4  containing 0.5% wt NH4F, 1M NaF containing 0.5% wt (NH4)2SO4  and a mixture of water: ethylene glycol 1:9 containing 0.5% wt NH4F. The foils were marked as EG type (Ethylene Glycol), AS type (Ammonium sulfate), SS type (sodium sulfate) and SF type (sodium fluoride). The photocatalytic capabilities and characterization of the fabricated NTAs were analyzed using SEM, XRD, and DRS. The degradation ratio of designated organic pollutants (Rhodamine B) was analyzed. The obtained results have proven that foils fabricated using Ethylene glycol have significant photocatalytic abilities, with a degradation ratio of EG-SS-SF-AS types being 80% to 85%, 70% to 80%, 70% to 75% and 52% to 55%, respectively.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 1; 34-40
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GABA- and 5-HT-immunoreactivity in nervous system of Caryophyllaeus laticeps [Cestoda: Caryophyllaeidea]
Autorzy:
Biserova, N.M.
Reuter, M.
Gustafsson, M.K.S.
Powiązania:
https://bibliotekanauki.pl/articles/841330.pdf
Data publikacji:
1998
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
parasite
Cestoda
Caryophyllaeus laticeps
Caryophyllaeidea
rhodamine B isothiocyanate
gamma-globulin fraction
nervous system
gamma-aminobutyric acid
Źródło:
Annals of Parasitology; 1998, 44, 3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 12

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies