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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A controllable floating pDA-PVDF bead for enhanced decomposition of H2O2 and degradation of dyes
Binrong Li,Huijie Wang,Lan Yiying,Yanhua Cui,Yunlei Zhang,Yonghai Feng,Jianming Pan,Minjia Meng,Chundu Wu +8 more
TL;DR: In this article, an alternative polydopamine (pDA)-modified PVDF bead was provided as excellent photo-Fenton support for immobilizing Fe species/biochar fiber composite (FCF) by phase inversion, which not only limits the loss of iron ions, but also promotes the H2O2 decomposition.
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Ce/Eu redox couple functionalized HKUST-1 MOF insight to sono-photodegradation of malathion
TL;DR: The Ce/Eu redox pair-functionalized HKUST-1 MOF, as an innovative environmentally friendly and recyclable sono-photocatalyst, was hydrothermally mixed and fully characterized by XRD, PL, EIS, FE-SEM, EDS, Mott-Schottky, chronoamperometry, and DRS techniques.
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Photoluminescence and photocatalytic properties of europium doped ZnO nanoparticles
TL;DR: In this article, the effect of europium doping in enhancing the optical properties of ZnO nanoparticles was described, where the soft-solution method with varying the dopant concentration was used.
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Synthesis of Cr-doped SnO2 quantum dots and its enhanced photocatalytic activity
TL;DR: In this article, a simple combustion method was used to synthesize Cr-doped SnO2 quantum dots (QDs) with various doping concentration, and the X-ray diffraction patterns revealed that the prepared QDs have monophasic tetragonal rutile-type crystallite structure with an average crystallite size of ∼3nm.
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Photocatalytic properties of zirconium oxide–zinc oxide nanoparticles synthesised using microwave irradiation
TL;DR: In this article, a two-stage precipitation method with microwave irradiation was used to obtain ZnO2-ZnO nanoparticles with different mass concentrations of ZrO2 (1, 5, 10, 20%).
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