Discoloration and mineralization of Orange II by using Fe3+-doped TiO2 and bentonite clay-based Fe nanocatalysts

Feng, Jiyun; Wong, Raymond S.K.; Hu, Xijun; Yue, Po Lock

doi:10.1016/j.cattod.2004.08.007

Cited by 62 publications

(29 citation statements)

References 18 publications

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“…For instance, in view of an actual application of the photo-Fenton method to wastewater treatment, homogeneous catalysts bring some limitations, due to the production of Fe-containing sludge, catalyst deactivation and the limited range of operating pH [62], whereas the studied catalysts were active at the natural pH of the solution. Several studies have been also carried out on heterogeneous photo-Fenton systems implying, for instance, the oxidation of AO7 by Fe-bentonite and Fe-laponite catalysts [63].…”

Section: Discussionmentioning

confidence: 99%

Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light

et al. 2017

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A sample of mesoporous TiO 2 (MT, specific surface area = 150 m 2 ·g −1 ) and two samples of MT containing 2.5 wt.% Fe were prepared by either direct synthesis doping (Fe2.5-MTd) or impregnation (Fe2.5-MTi). Commercial TiO 2 (Degussa P25, specific surface area = 56 m 2 ·g −1 ) was used both as a benchmark and as a support for impregnation with either 0.8 or 2.5 wt.% Fe (Fe0.80-IT and Fe2.5-IT). The powders were characterized by X-ray diffraction, N 2 isotherms at −196 • C, Energy Dispersive X-ray (EDX) Spectroscopy, X-ray Photoelectron Spectroscopy (XPS), Diffuse Reflectance (DR) ultra-violet (UV)-Vis and Mössbauer spectroscopies. Degradation of Acid Orange 7 (AO7) by H 2 O 2 was the test reaction: effects of dark-conditions versus both UV and simulated solar light irradiation were considered. In dark conditions, AO7 conversion was higher with MT than with Degussa P25, whereas Fe-containing samples were active in a (slow) Fenton-like reaction. Under UV light, MT was as active as Degussa P25, and Fe doping enhanced the photocatalytic activity of Fe2.5-MTd; Fe-impregnated samples were also active, likely due to the occurrence of a photo-Fenton process. Interestingly, the Fe2.5-MTd sample showed the best performance under solar light, confirming the positive effect of Fe doping by direct synthesis with respect to impregnation.

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Section: Discussionmentioning

confidence: 99%

Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light

et al. 2017

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“…Therefore, in order to solve these problems, the effects of some metal and nonmetal as dopants such as Fe, Pt, Ag, C and S were already investigated. [10][11][12][13][14] Especially, C and Fe co-doped TiO2 showed higher activity than pristine TiO2 in multiple uses. 15 Another previous research also showed two dopants had more beneficial effect than a single one for improving adsorption ability and photocatalytic activity.…”

Section: • ) and Hydroxyl Radicals (Oh •mentioning

confidence: 99%

Kinetic Study of the Visible Light-Induced Sonophotocatalytic Degradation of MB Solution in the Presence of Fe/TiO₂-MWCNT Catalyst

Zhang¹,

Oh²

2010

Bulletin of the Korean Chemical Society

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In order to effective degradation of organic dye both under visible light or ultrasonic irradiation, the MWCNTs (multiwalled carbon nanotube) deposited with Fe and TiO2 were prepared by a modified sol-gel method. The Fe/TiO2-MWCNT catalyst was characterized by surface area of BET, scanning electron microscope (SEM), Transmission Electron Microscope (TEM), X-ray diffraction (XRD), and energy dispersive X-ray (EDX) and ultraviolet-visible (UV-vis) spectroscopy. The low intensity visible light and low power ultrasound was as an irradiation source and the methylene blue (MB) was choose as the model organic dye. Then degradation experiments were carried out in present of undoped TiO2, Fe/TiO2 and Fe/TiO2-MWCNT catalysts. Through the degradation of MB solution, the results showed the feasible and potential use of Fe/TiO2-MWCNT catalyst under visible light and ultrasonic irradiation due to the enhanced formation of reactive radicals as well as the possible visible light and the increase of ultrasound-induced active surface area of the catalyst. After addition of H2O2, the MB degradation rates have been accelerated, especially with Fe/TiO2-MWCNT catalyst, in case of that the photo-Fenton reaction occurred. The sonophotocatalysis was always faster than the respective individual processes due to the more formation of reactive radicals as well as the increase of the active surface area of Fe/TiO2-MWCNT catalyst.

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“…It is observed the slight differences between the two profiles, especially the different Na + intensity for our expected interesting. It is indicated that the content of Na + on the near surface of treated float-glass upper surface is lower than that of the original one, which means that Na + migrates from the glass surface to the bulk (it has been already reported that Na is a highly mobile element in glasses [19] ). In the same time, the contents of Ca and Si on the near surface of treated float-glass upper surface are higher than those of the original one.…”

Section: Resultsmentioning

confidence: 95%

Effect of additional applied thermal/electric field on the float-glass surface

Zu-wu

Liu

et al. 2009

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Abstracts: The chemical resistances of float-glasses subjected to different electric field strength and temperature were investigated. It is indicated that the chemical resistance increases after the float-glasses are annealed with suitable temperature and electric field strength. It is also observed that the Na + content varies obviously under the conditions of 570 ℃, 1500 V/cm and 10 min, implying that the application of thermal/electric field improves the chemical resistance of float-glass online.

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Discoloration and mineralization of Orange II by using Fe3+-doped TiO2 and bentonite clay-based Fe nanocatalysts

Cited by 62 publications

References 18 publications

Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light

Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light

Kinetic Study of the Visible Light-Induced Sonophotocatalytic Degradation of MB Solution in the Presence of Fe/TiO₂-MWCNT Catalyst

Effect of additional applied thermal/electric field on the float-glass surface

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Discoloration and mineralization of Orange II by using Fe3+-doped TiO2 and bentonite clay-based Fe nanocatalysts

Cited by 62 publications

References 18 publications

Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light

Pure and Fe-Doped Mesoporous Titania Catalyse the Oxidation of Acid Orange 7 by H2O2 under Different Illumination Conditions: Fe Doping Improves Photocatalytic Activity under Simulated Solar Light

Kinetic Study of the Visible Light-Induced Sonophotocatalytic Degradation of MB Solution in the Presence of Fe/TiO2-MWCNT Catalyst

Effect of additional applied thermal/electric field on the float-glass surface

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Kinetic Study of the Visible Light-Induced Sonophotocatalytic Degradation of MB Solution in the Presence of Fe/TiO₂-MWCNT Catalyst