Enhanced photocatalytic degradation of methylene blue and methyl orange by ZnO:Eu nanoparticles
Lidija V. Trandafilović,Dragana Jovanovic,Xueqiang Zhang,Sylwia Ptasinska,Miroslav D. Dramićanin +4 more
TLDR
In this paper, the influence of europium doping and solvents on size, particles agglomeration, light absorption and photocatalytic activity was analyzed in ZnO nanoparticles.Abstract:
ZnO nanoparticles doped with different Eu3+ percentages were synthesized in water (ZnO:Eu(x%)-W) and other solvents (methanol ZnO:Eu(x%)-M and ethanol ZnO:Eu(x%)-E). X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), optical absorption and photoluminescence (PL) spectroscopy were used for characterization of the nanoparticles. Our results showed influence of europium doping and solvents on size, particles agglomeration, light absorption and photocatalytic activity. Improvement in photocatalytical activity with addition of Eu3+ doping was detected. Particle size increased with Eu3+ doping in water samples, while it decreased in methanol. Agglomeration was more prominent in ZnO:Eu(x%)-W samples. Greater amount of surface OH groups in case of ZnO:Eu(x%)-M samples was detected by PL, XPS and FTIR measurements. Influence of europium doping, as an electron trap, and surface OH groups, as a hole trap, was studied in sunlight photocatalytic degradation of cationic methylene blue (MB) and anionic methyl orange (MO). Improved photocatalytic behavior was discussed and influence of active species was further investigated using hole and hydroxyle radical scavengers. The degradation pathway of MB and MO, using high performance liquid chromatohraphy (HPLC), is also examined.read more
Citations
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Mechanistic insights into photodegradation of organic dyes using heterostructure photocatalysts
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Photocatalysts for degradation of dyes in industrial effluents: Opportunities and challenges
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Degradation of methylene blue and methyl orange by palladium-doped TiO2 photocatalysis for water reuse: Efficiency and degradation pathways
TL;DR: In this article, a facile sol-gel method was used to enhance degradation of single and binary methylene blue and methyl orange by ultraviolet photocatalysis, and the results showed that the prepared materials were easier to separate from the treated liquid using a simple sedimentation or filtration method than P25 TiO2.
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Review on Methylene Blue: Its Properties, Uses, Toxicity and Photodegradation
Idrees Matthew Khan,Khalid Saeed,Ivar Zekker,Baoliang Zhang,Abdulmajeed H. Hendi,Ashfaq Ahmad,Shujaat Ahmad,Noor Zada,Hanif Ahmad,Luqman Ali Shah,Tariq Shah,Ibrahim Khan +11 more
TL;DR: In this paper , the authors provided a tutorial basis for the readers working in the dye degradation research area and provided a wide range of previously published work on advanced photocatalytic systems.
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Adsorption kinetic modeling using pseudo-first order and pseudo-second order rate laws: A review
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