Rhodamine B
Mostrando 1-12 de 149 artigos, teses e dissertações.
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1. Tuning the Photocatalytic Activity of Tin Oxide through Mechanical Surface Activation
Tin oxide (SnO2) nanoparticles were synthesized by the co-precipitation method and mechanically modified by high-energy ball milling. The experimental results demonstrate that the collision with zirconia balls produces slight changes in the crystalline, electronic, morphological, and surface properties of SnO2, which lead to an increase in the redox potentia
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Zinc tungstate: a review on its application as heterogeneous photocatalyst
Abstract ZnWO4 crystallizes in a monoclinic wolframite-like structure, which has been studied for applications in heterogeneous photocatalysis for degradation, oxidation, and reduction of various contaminants. This type of tungstate has proved to be an efficient photocatalyst under both ultraviolet and visible light irradiation and, when ZnWO4 forms a hetero
Cerâmica. Publicado em: 2022
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3. PHOTODEGRADATION OF RhB UNDER VISIBLE LIGHT BY PT/TIO2 NANOPARTICLES PREPARED THROUGH PHOTOREDUCTIVE DEPOSITION PROCESS
Pt/TiO2 nanoparticles were prepared by a simple two-step aqueous solution method, which consists of a low temperature hydrothermal step and a photoreduction deposition step. The as-prepared samples were characterized by XRD, TEM, XPS, UV-vis, and BET techniques. The as-prepared samples exhibited enhanced photocatalytic activity towards the degradation of rho
Quím. Nova. Publicado em: 2021-03
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4. INCORPORAÇÃO DE RODAMINA B EM MEMBRANA DE POLIAMIDA PELO MÉTODO DA ADSORÇÃO
We have incorporated rhodamine into polyamide membranes by additive manufacture selective laser sintering technology. Incorporation into 0.5 cm2 membranes was conducted at different pH values and constant temperature of 25 oC. The amounts of incorporated dye were determined by a calibration curve, and analyses showed rhodamine incorporation in the order of 1
Quím. Nova. Publicado em: 2021-02
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5. Nanostructured Lipid Carriers Loaded with 17-α-Estradiol Accumulate into Hair Follicles
To improve 17-α-estradiol targeting in alopecia treatment, a formulation of nanostructured lipid carrier (NLC) prepared by the sonication method was developed. The physicochemical characterization showed an average diameter of 96 ± 15 nm and the average zeta potential of -17 ± 6 mV. In addition, the encapsulation efficiency (EE) of 17-α-estradiol, assess
J. Braz. Chem. Soc.. Publicado em: 2020-07
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6. Correlation between Bond Strength to Dentin and Sealers Penetration by Push-Out Test and CLSM Analysis
Resumo Este estudo correlacionou a resistência de união (RU) e a penetração de cimentos de diferentes bases à dentina radicular por meio do teste push-out e da análise por microscopia Confocal a laser (MCL). Quarenta e cinco canais radiculares foram preparados pela técnica coroa-ápice e obturados com guta-percha associada aos seguintes cimentos (n=15
Braz. Dent. J.. Publicado em: 28/11/2019
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7. Molten Salt Synthesis of Bi2WO6 Powders and its Visible-Light Photocatalytic Activity
Bi2WO6 powders were synthesized by the molten salt method at 250-350 ºC using the mixture of Bi(NO3)3·5H2O and Na2WO4·2H2O as a precursor, and the mixture of LiNO3 and NaNO3 with a molar ratio of 27:33 as a molten salt, respectively. The effects of temperature and salt amount on the phase composition, morphology and photocatalytic activity under the visib
Mat. Res.. Publicado em: 21/10/2019
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8. A FAIR COMPARISON BETWEEN BISMUTH CATALYSTS FOR APPLICATION IN PHOTODEGRADATION UNDER VISIBLE AND SOLAR LIGHT
ABSTRACT Three different bismuth catalysts (Bi2WO6, BiOI and BiVO4) were synthesized using solvo- and hydrothermal methods. Different reaction times, calcination and the addition of poly (vinyl pyrrolidone) during synthesis were tested to investigate the effect of these variables on the catalysts’ morphology and photocatalytic activity. The photocatalytic
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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9. Effect of Conditioning Protocols and Ultrasonic Application of an Infiltrant Resin in White Spot Lesions
Resumo: O objetivo deste estudo foi avaliar diferentes protocolos de condicionamento e a aplicação sônica/ultrassônica de uma resina infiltrante (RI) em lesões de mancha branca produzidas artificialmente (LMBA). As superfícies vestibulares/linguais de 48 molares foram induzidas à formação de LMBA e divididas em 6 grupos, de acordo com os protocolos
Braz. Dent. J.. Publicado em: 2019-02
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10. Photodegradation of Rhodamine B catalyzed by ZnO pellets
Abstract This paper describes the development of ZnO semiconductors applied as photocatalysts for the degradation of water contaminants, with the shape of ceramic pellets thick enough to maintain their structures, prepared by slip casting and sintering. The samples presented porosities around 40% and densities around 3.4 g/cm3, which represented about 61% of
Cerâmica. Publicado em: 2019-01
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11. Effect of thermal treatment on the catalytic activity of a Fe-rich bentonite for the photo-Fenton reaction
Resumo O objetivo deste trabalho foi avaliar a degradação do corante rodamina B em solução aquosa por reação foto-Fenton sob irradiação visível utilizando uma bentonita rica em ferro como catalisador. O material foi tratado termicamente a baixa temperatura (200 ºC) e caracterizado por DRX, isotermas de adsorção-dessorção de N2, FTIR, MEV-EDS e
Cerâmica. Publicado em: 2019-01
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12. Evaluation of the efficacy of filling material removal and re-filling after different retreatment procedures
Abstract This study analyzed the influence of different retreatment protocols on amount of remaining filling material and amount of new sealer after endodontic retreatment. Forty mandibular molars with curved mesial roots were prepared with ProTaper Universal system, and filled with AH Plus sealer mixed with 0.1% rhodamine B and gutta-percha. After 7 days, t
Braz. oral res.. Publicado em: 13/09/2018