Photocatalytic Degradation of Phenol Using Nb-Loaded ZnO Nanoparticles

Kruefu, Viruntachar; Ninsonti, Hathaithip; Wetchakun, Natda; Inceesungvorn, Burapat; Pookmanee, Pusit; Phanichphant, Sukon

doi:10.4186/ej.2012.16.3.91

Cited by 26 publications

(15 citation statements)

References 28 publications

(28 reference statements)

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“…Significant progress has been made in recent years in synthesizing nanoparticles as environmental purification photocatalysts [5,6]. Many researchers reported that titanium dioxide (TiO 2 ), zinc oxide (ZnO) and tin dioxide (SnO 2 ) are the most active catalysts for the degradation of dyes, phenols and pesticides [7][8][9][10][11]. In addition, these semiconductors have been recognized as preferable materials for photocatalytic processes due to their photosensitivity, non-toxicity, low cost and high chemical stability [7,12,13].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of phenol by iodine doped tin oxide nanoparticles under UV and sunlight irradiation

Al-Hamdi

Sillanpää

Dutta

2015

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of phenol by iodine doped tin oxide nanoparticles under UV and sunlight irradiation

Al-Hamdi

Sillanpää

Dutta

2015

Journal of Alloys and Compounds

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“…Different factors such as dopant(s), oxidants, and various surfactants have been found to improve the photocatalytic behavior of TiO 2 nanoparticles [13][14][15]. Numerous studies have been conducted to show the effects of various surfactants and transition metals (e.g., iron, vanadium, copper, niobium, and cobalt) as dopants in improving its photocatalytic activity [16][17][18][19][20][21]. Doping TiO 2 with slight amounts of transition elements causes trapping of the electrons, which results in narrowing of the band gap and lowering electron-hole recombination.…”

Section: Introductionmentioning

confidence: 99%

Effects of different surfactants on morphology of TiO2 and Zr-doped TiO2 nanoparticles and their applications in MB dye photocatalytic degradation

et al. 2019

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In recent years, great attention has been paid to the synthesis of nano-size TiO 2 due to its wide range of applications, particularly in the area of degradation of organic pollutants. In this study, different surfactants were used in synthesizing TiO 2 and Zr-doped TiO 2 nanoparticles. The effects of the surfactants' types and concentrations on the morphology and size of the TiO 2 nanoparticles were studied. The synthesized nanoparticles were characterized using Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, and transmission electron microscopy. It was found that the TiO 2 nanoparticles are a mixture of two anatase and rutile phases, whereas the surfactant-modified TiO 2 nanoparticles have a dominant anatase phase. According to the SEM images, the synthesized nanoparticles' morphologies depended not only on the type, but also on the concentration of the surfactants. The photocatalytic behavior of the nanoparticles on the degradation of methylene blue (MB) dye was evaluated. The maximum efficiency was achieved for the TiO 2 nanoparticles synthesized using 0.08 molar surfactant Sodium bis(2ethylhexyl)sulfosuccinate; reached 76% after 300 min of ultraviolet radiation. This indicated superior photocatalytic activity of this sample compared to all other synthesized nanoparticles, due to its uniform spherical morphology and particle sizes of 40-50 nm. For this sample, the effects of such parameters as catalyst amount and MB dye solution pH and temperature were optimized for its photocatalytic activity.

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“…This work provides supports that the variations in the intermediates are the result from the difference in adsorption configuration on the surface of the catalyst. Wurtzite zinc oxide (ZnO) was chosen as the catalyst in this study because it could be synthesized in a manner such that the exposed surfaces could be controlled [15]. Two main sets of ZnO surfaces were considered; (i) zinc-terminated (0001) and oxygen-terminated (0001 ̅ ) polar surfaces located on top and bottom planes of the hexagonal ZnO crystal, and (ii) mixed-terminated (101 ̅ 0) non-polar surface appeared as the side planes of the crystal.…”

Section: Introductionmentioning

confidence: 99%

Dependence of Catalyst Surface in Photocatalytic Degradation of Phenyl Urea Herbicides

Meephon

Puttamat

Pavarajarn

2018

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Photocatalytic degradations of various contaminants using in-house synthesized catalysts have been generally reported, but the degradation intermediates formed are normally inconsistent. This issue is particularly important for the degradation of toxic compounds which may form intermediates with increased toxicity. This work resolves this issue by systematically investigating adsorption and photocatalytic degradation of diuron, linuron, and 3,4-dichloroaniline (DCA) on two forms of zinc oxide (ZnO), i.e., conventional particles with zinc-and oxygen-terminated polar surfaces, and nanorods with mixed-terminated non-polar surfaces. Experimental results indicate that both rate of degradation and degradation pathway depend upon the adsorption configuration of the compound undergoing the degradation onto the surface of the catalyst. The adsorption configuration is surface dependent. On polar surfaces, both aliphatic and aromatic sides of diuron and linuron molecules adsorb on the surface, allowing the attack of hydroxyl radicals on both ends. On the other hand, on non-polar surface, only the aliphatic chain adsorbs onto the surface, resulting in the hydroxyl radicals attack only on the aliphatic side. The structure of the catalyst is therefore a crucial factor determining the dominant degradation pathway.

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Photocatalytic Degradation of Phenol Using Nb-Loaded ZnO Nanoparticles

Cited by 26 publications

References 28 publications

Photocatalytic degradation of phenol by iodine doped tin oxide nanoparticles under UV and sunlight irradiation

Photocatalytic degradation of phenol by iodine doped tin oxide nanoparticles under UV and sunlight irradiation

Effects of different surfactants on morphology of TiO2 and Zr-doped TiO2 nanoparticles and their applications in MB dye photocatalytic degradation

Dependence of Catalyst Surface in Photocatalytic Degradation of Phenyl Urea Herbicides

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