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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Cu3N Nanocrystals Decorated with Au Nanoparticles for Photocatalytic Degradation of Organic Dyes
TL;DR: In this article, a thermal decomposition of copper nitrate (Cu(NO3)2, 3H2O) in the presence of oleylamine and 1-octadecene was proposed.
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Understanding the origin of synergistic catalytic activities for ZnO based sonophotocatalytic degradation of methyl orange
TL;DR: The role of ultrasonic field during the sonophotocatalytic degradation of methyl orange (MO) was investigated in this paper, where ZnO samples with three different morphologies (rod-like, flower-like and sheet-like) have been synthesized for the methyl orange degradation.
Journal ArticleDOI
Low temperature one-pot synthesis of Cu-doped ZnO/Al2O3 composite by a facile rout for rapid methyl orange degradation
TL;DR: Formed Al2O3/ZnO:Cu composite exhibited a supreme photocatalytic performance upon the degradation of methyl orange under visible-light irradiation and showed that the inserting of Cu in composite improves the photoc atalytic activity of ZnO under visible light.
Journal ArticleDOI
Photocatalytic properties of β-pyrochlore RbTe1.5W0.5O6 under visible-light irradiation
D.G. Fukina,Andrey V. Koryagin,Aleksandra V. Koroleva,Evgeny V. Zhizhin,E.V. Suleimanov,Natalia I. Kirillova +5 more
TL;DR: In this paper, a β-pyrochlore type compound with composition RbTe1·5W0·5O6 has been studied as photocatalysts for decomposition of organic dyes.
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Effect of Adsorption on the Photoluminescence of Zinc Oxide Nanoparticles
TL;DR: In this paper, the photoluminescence changes of ZnO nanospheres at room temperature have been measured during exposure to gases and vapors using a traditional fluorometer and a portable, ultraviolet (UV) light-emitting diode-based instrument.
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