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Jingang Wang - One of the best experts on this subject based on the ideXlab platform.
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Degradation of Rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H2O2.
Journal of Hazardous Materials, 2009Co-Authors: Xikui Wang, Jingang Wang, Chen WangAbstract:Abstract The degradation of Rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H 2 O 2 was investigated. It was found that there is an obvious synergetic effect between hydrodynamic cavitation and H 2 O 2 for the degradation of Rhodamine B. The effects of various operating parameters such as H 2 O 2 dosage, medium pH, solution temperature, fluid pressure and the dye initial concentration on the degradation of Rhodamine B have been studied. It was found that the removal of Rhodamine B in aqueous solution was increased with increasing the addition of H 2 O 2 and the fluid pressure, and the removal of Rhodamine B was decreased with increasing the medium pH and dye initial concentration. It was also found that the degradation of Rhodamine B is dependent on the solution temperature. The removal of Rhodamine B increased with increase of temperature from 30 to 50 °C, but less degradation ratio is observed at 60 °C. The degradation kinetics of Rhodamine B in aqueous solution using swirling jet-induced cavitation combined with H 2 O 2 under various operational conditions was also investigated. It was found that the degradation of Rhodamine B follows a pseudo-first-order kinetics.
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Chemical effect of swirling jet-induced cavitation: degradation of Rhodamine B in aqueous solution.
Ultrasonics Sonochemistry, 2007Co-Authors: Xikui Wang, Jingang WangAbstract:The chemical effect of swirling jet-induced cavitation was investigated with the decomposing reaction of Rhodamine B in aqueous solution. It was found that Rhodamine B in aqueous solution can be degraded with swirling jet-induced cavitation and the degradation can be described by a pseudo-first-order kinetics. The effects of operating conditions such as pressure, temperature, initial concentration of Rhodamine B, pH of water on the degradation rate of Rhodamine B were discussed. It was found that the degradation rate of Rhodamine B increased with increasing pressure and decreased with increasing initial concentration. It was also found that the degradation of Rhodamine B was strongly dependent of temperature and pH of aqueous solution. The oxidation efficiency of swirling jet-induced cavitation for Rhodamine B degradation was discussed and compared with ultrasonic cavitation. The result indicated that the swirling jet-induced cavitation is more energy efficient as compared to sonochemical cavitation.
Xikui Wang - One of the best experts on this subject based on the ideXlab platform.
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Degradation of Rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H2O2.
Journal of Hazardous Materials, 2009Co-Authors: Xikui Wang, Jingang Wang, Chen WangAbstract:Abstract The degradation of Rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H 2 O 2 was investigated. It was found that there is an obvious synergetic effect between hydrodynamic cavitation and H 2 O 2 for the degradation of Rhodamine B. The effects of various operating parameters such as H 2 O 2 dosage, medium pH, solution temperature, fluid pressure and the dye initial concentration on the degradation of Rhodamine B have been studied. It was found that the removal of Rhodamine B in aqueous solution was increased with increasing the addition of H 2 O 2 and the fluid pressure, and the removal of Rhodamine B was decreased with increasing the medium pH and dye initial concentration. It was also found that the degradation of Rhodamine B is dependent on the solution temperature. The removal of Rhodamine B increased with increase of temperature from 30 to 50 °C, but less degradation ratio is observed at 60 °C. The degradation kinetics of Rhodamine B in aqueous solution using swirling jet-induced cavitation combined with H 2 O 2 under various operational conditions was also investigated. It was found that the degradation of Rhodamine B follows a pseudo-first-order kinetics.
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Chemical effect of swirling jet-induced cavitation: degradation of Rhodamine B in aqueous solution.
Ultrasonics Sonochemistry, 2007Co-Authors: Xikui Wang, Jingang WangAbstract:The chemical effect of swirling jet-induced cavitation was investigated with the decomposing reaction of Rhodamine B in aqueous solution. It was found that Rhodamine B in aqueous solution can be degraded with swirling jet-induced cavitation and the degradation can be described by a pseudo-first-order kinetics. The effects of operating conditions such as pressure, temperature, initial concentration of Rhodamine B, pH of water on the degradation rate of Rhodamine B were discussed. It was found that the degradation rate of Rhodamine B increased with increasing pressure and decreased with increasing initial concentration. It was also found that the degradation of Rhodamine B was strongly dependent of temperature and pH of aqueous solution. The oxidation efficiency of swirling jet-induced cavitation for Rhodamine B degradation was discussed and compared with ultrasonic cavitation. The result indicated that the swirling jet-induced cavitation is more energy efficient as compared to sonochemical cavitation.
Chen Wang - One of the best experts on this subject based on the ideXlab platform.
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Degradation of Rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H2O2.
Journal of Hazardous Materials, 2009Co-Authors: Xikui Wang, Jingang Wang, Chen WangAbstract:Abstract The degradation of Rhodamine B in aqueous solution by using swirling jet-induced cavitation combined with H 2 O 2 was investigated. It was found that there is an obvious synergetic effect between hydrodynamic cavitation and H 2 O 2 for the degradation of Rhodamine B. The effects of various operating parameters such as H 2 O 2 dosage, medium pH, solution temperature, fluid pressure and the dye initial concentration on the degradation of Rhodamine B have been studied. It was found that the removal of Rhodamine B in aqueous solution was increased with increasing the addition of H 2 O 2 and the fluid pressure, and the removal of Rhodamine B was decreased with increasing the medium pH and dye initial concentration. It was also found that the degradation of Rhodamine B is dependent on the solution temperature. The removal of Rhodamine B increased with increase of temperature from 30 to 50 °C, but less degradation ratio is observed at 60 °C. The degradation kinetics of Rhodamine B in aqueous solution using swirling jet-induced cavitation combined with H 2 O 2 under various operational conditions was also investigated. It was found that the degradation of Rhodamine B follows a pseudo-first-order kinetics.
Rodolphe Antoine - One of the best experts on this subject based on the ideXlab platform.
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Temperature Response of Rhodamine B-Doped Latex Particles. From Solution to Single Particles
Langmuir, 2016Co-Authors: Antonin Soleilhac, Pierre-yves Dugas, François Bayard, Julien Parvole, Marion Girod, Philippe Dugourd, Emmanuel Lacote, Béatrice Burdin, Elodie Bourgeat-lami, Rodolphe AntoineAbstract:Nanoparticle-based temperature imaging is an emerging field of advanced applications. Herein, the sensitivity of the fluorescence of Rhodamine B-doped latex nanoparticles toward temperature is described. Submicrometer size latex particles were prepared by a surfactant-free emulsion polymerization method that allowed a simple and inexpensive way to incorporate Rhodamine B into the nanoparticles. Also, Rhodamine B-coated latex nanoparticles dispersed in water were prepared in order to address the effect of the dye location in the nanoparticles on their temperature dependence. A better linearity of the temperature dependence emission of the Rhodamine B-embedded latex particles, as compared to that of free Rhodamine B dyes or Rhodamine B-coated latex particles, is observed. Temperature-dependent fluorescence measurements by fluorescent confocal microscopy on individual Rhodamine B-embedded latex particles were found similar to those obtained for fluorescent latex nanoparticles in solution, indicating that the...
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Temperature Response of Rhodamine B-Doped Latex Particles. From Solution to Single Particles
Langmuir, 2016Co-Authors: Antonin Soleilhac, Pierre-yves Dugas, François Bayard, Julien Parvole, Marion Girod, Philippe Dugourd, Emmanuel Lacote, Béatrice Burdin, Elodie Bourgeat-lami, Rodolphe AntoineAbstract:Nanoparticle-based temperature imaging is an emerging field of advanced applications. Herein, the sensitivity of the fluorescence of Rhodamine B-doped latex nanoparticles toward temperature is described. Submicrometer size latex particles were prepared by a surfactant-free emulsion polymerization method that allowed a simple and inexpensive way to incorporate Rhodamine B into the nanoparticles. Also, Rhodamine B-coated latex nanoparticles dispersed in water were prepared in order to address the effect of the dye location in the nanoparticles on their temperature dependence. A better linearity of the temperature dependence emission of the Rhodamine B-embedded latex particles, as compared to that of free Rhodamine B dyes or Rhodamine B-coated latex particles, is observed. Temperature-dependent fluorescence measurements by fluorescent confocal microscopy on individual Rhodamine B-embedded latex particles were found similar to those obtained for fluorescent latex nanoparticles in solution, indicating that these nanoparticles could be good candidates to probe thermal processes as nanothermometers.
Olivier Buriez - One of the best experts on this subject based on the ideXlab platform.
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Electrochemical switching fluorescence emission in Rhodamine derivatives
Electrochimica Acta, 2018Co-Authors: Martina Čížková, Laurent Cattiaux, Jean-maurice Mallet, Eric Labbé, Olivier BuriezAbstract:Three Rhodamine derivatives exhibiting electrofluorochromic properties were investigated by cyclic voltammetry and UVeVis/fluorescence spectroelectrochemistry. Rhodamine 101 (Rh101, compound 1) was used as a reference model. In compound 2, the carboxylate anion of Rh101 was replaced by an alkyne moiety to allow further functionalization. The compound 3 was prepared from 2 by conversion of the alkyne to a triazole group bearing an alkyl chain with an alcohol function. These three Rhodamine derivatives exhibited similar electrochemical behaviors. Their mono-electronic reductions produced the corresponding radical species which were stable on the timescale of cyclic voltammetry. Additional reduction of electrogenerated radicals produced unstable anions which underwent subsequent chemical reaction, most likely protonation. Based on cyclic voltammetry investigations, absorption and fluores-cence spectroelectrochemistry were then performed on compounds 1, 2, 3 and their parent reduced radicals 1a, 2a, 3a. UVeVis spectroelectrochemistry, combined with TD-DFT calculation, confirmed the formation of radicals upon mono-electronic reduction of starting Rhodamines. Fluorescence spec-troelectrochemistry showed that, contrary to their parent molecules, electrogenerated radicals were non-fluorescent. Electrochemical fluorescence extinction was successfully achieved with all studied compounds. Moreover, compound 1 underwent on/off switching between fluorescent and non-fluorescent states repeatedly. Also, recovery of fluorescence in compound 3 was observed, which open interesting opportunities for the development of versatile Rhodamine-based probes.
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Electrochemical Switching Fluorescence Emission in Rhodamine Derivatives
Electrochimica Acta, 2018Co-Authors: Martina Čížková, Laurent Cattiaux, Jean-maurice Mallet, Eric Labbé, Olivier BuriezAbstract:Three Rhodamine derivatives exhibiting electrofluorochromic properties were investigated by cyclic voltammetry and UV-Vis/fluorescence spectroelectrochemistry. Rhodamine 101 (Rh101, compound 1) was used as a reference model. In compound 2, the carboxylate anion of Rh101 was replaced by an alkyne moiety to allow further functionalization. The compound 3 was prepared from 2 by conversion of the alkyne to a triazole group bearing an alkyl chain with an alcohol function. These three Rhodamine derivatives exhibited similar electrochemical behaviors. Their mono-electronic reductions produced the corresponding radical species which were stable on the timescale of cyclic voltammetry. Additional reduction of electrogenerated radicals produced unstable anions which underwent subsequent chemical reaction, most likely protonation. Based on cyclic voltammetry investigations, absorption and fluorescence spectroelectrochemistry were then performed on compounds 1, 2, 3 and their parent reduced radicals 1a, 2a, 3a. UV-Vis spectroelectrochemistry, combined with TD-DFT calculation, confirmed the formation of radicals upon mono-electronic reduction of starting Rhodamines. Fluorescence spectroelectrochemistry showed that, contrary to their parent molecules, electrogenerated radicals were non-fluorescent. Electrochemical fluorescence extinction was successfully achieved with all studied compounds. Moreover, compound 1 underwent on/off switching between fluorescent and non-fluorescent states repeatedly. Also, recovery of fluorescence in compound 3 was observed, which open interesting opportunities for the development of versatile Rhodamine-based probes. 2