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
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Tuning the morphologies of ZnO for enhanced photocatalytic activity
TL;DR: In this article , the effect of morphology on the decolorization of Rhodamine B solution under UV light irradiation was investigated, and the results indicated the dependence of enhanced photocatalytic activity on morphology but not the surface area of material.
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Highly Active under VIS Light M/TiO2 Photocatalysts Prepared by Single-Step Synthesis
TL;DR: In this paper , a single-step impregnation approach was investigated as a synthetic route for photocatalyst synthesis active under visible light, and the as-derived photocatalysts exhibited very high degradation rates towards methylene blue (MB) decolorization under visible-light despite the high concentration of the initial MB solution concentration.
Journal ArticleDOI
Integration of silicon nanodots and rare earth functionalized amino clay for intelligent colorful assessment of tetracycline
TL;DR: In this article , a nanosensor was constructed by integrating biocompatible silicon nanoparticles (B-SiNPs), amino clay (AC), and rare earth europium ions (Eu3+) to achieve rapid visual recognition of tetracycline by using colorful fluorescence changes.
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Structural and Physicochemical Properties of Carbon Nitride Nanoparticles via Precursor Thermal Treatment: Effect on Methyl Orange Photocatalytic Discoloration
Laura S. Gómez-Velázquez,Lorean Madriz,Monica Rigoletto,Enzo Laurenti,Monserrat Bizarro,María Laura Dell'Arciprete,Mónica C. Gonzalez +6 more
TL;DR: In this article , the photocatalytic activity of carbon nitride (CN) powders for methyl orange (MO) discoloration was investigated using 350 nm and simulated solar light (SSL) irradiation.
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Promising Rare-Earth-Doped, Electrospun, ZnO Nanofiber N-type Semiconductor for Betavoltaic Batteries
TL;DR: In this paper , rare-earth (Ce, Sm, and Y)-doped ZnO nanofibers were synthesized using advanced electrospinning technology, and the structure and properties of the synthesized materials were tested and analyzed.
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