The effect of milling atmospheres on photocatalytic property of Fe-doped TiO2 synthesized by mechanical alloying

Fan, Lin; Jiang, Dongmei; Ma, Xiaoqing

doi:10.1016/j.jallcom.2008.02.067

Cited by 30 publications

(10 citation statements)

References 31 publications

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“…The literature indicates that doping titania with lower amounts of Fe 2 O 3 is associated with the formation of the anatase phase without any remarkable influence on the crystallite size and that a low amount of Fe 2 O 3 is incorporated into the TiO 2 lattice which is attributed to the similarities of the ionic radii of Ti 4+ and Fe 3+.…”

Section: Resultsmentioning

confidence: 99%

A Green Route to Produce Adipic Acid on TiO₂–Fe₂O₃ Nanocomposites

Ameur

Bachir

Bedrane

et al. 2017

J Chinese Chemical Soc

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In this work, we study cyclohexene oxidation by molecular oxygen on doped-TiO 2 . The improvement of the oxidizing capacity of titanium oxide by doping with iron oxide at different molar ratios is checked. All materials with different molar ratios (Ti/Fe = 9, 4, and 2) are prepared by the sol-gel method and fully characterized by ICP, XRD, SEM, DR/UV-vis, IR, and N 2 adsorption/desorption. The results show that iron is successfully incorporated into the titanium matrix but the incorporated amount is limited. In catalytic tests, improved activity is noticed while using TiO 2 in the presence of Fe 2 O 3 , which is due the improved oxidation. Conversion in the range of 21-42% depending on the presence of iron oxide was obtained with excellent yield of adipic acid (97% selectivity).

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Section: Resultsmentioning

confidence: 99%

A Green Route to Produce Adipic Acid on TiO₂–Fe₂O₃ Nanocomposites

Ameur

Bachir

Bedrane

et al. 2017

J Chinese Chemical Soc

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“…[13][14][15] The effect of milling atmosphere on nature of the nal phases and kinetics of amorphization is studied by a number of researchers. [16][17][18][19] For example, the dramatic effects of vial atmosphere and oxygen partial pressure on the transformation kinetics of α−Fe 2 O 3 reported by Zdujic et al 17) Preparation of Ni x Zn 1-x O solid solutions using high energy ball milling is challenging because of the lack of information about the mechanochemical reaction in Zn-NiO binary system. The previous works on Zn-NiO system-done under vacuum conditions-revealed that traces of nickel phase appear after 1800 seconds (30 minutes) of high energy ball milling, with mixture of ZnO and Ni 0.6 Zn 0.4 O as the product of 72000 seconds (20 hrs) of milling.…”

Section: Introductionmentioning

confidence: 99%

Formation of ZnO/Ni<sub>0.6</sub>Zn<sub>0.4</sub>O Mixture Using Mechanical Milling of Zn-NiO

2016

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Mixtures of Zn-NiO with stoichiometric compositions were milled for different times in open-valve milling cups. Although the gradual reduction of nickel oxide with zinc occurred during one hour of milling, it was found that nanometric mixtures of ZnO and Ni 0.6 Zn 0.4 O appear after 72000 seconds (20 hrs) of milling with the crystallite size of Ni 0.6 Zn 0.4 O phase being about 22 nm. On the other hand, and under the ow of argon gas, narrow and intense peaks of ZnO and Ni 0.6 Zn 0.4 O were observed after isothermal heating of 1800 seconds milled samples at 1273 K. Electron microscopy observations and elemental analysis of the products con rm formation of ZnO nano-needles distributed in the nickel zinc oxide matrix.

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“…4 With the steady and fast growing field of nanoscience and nanotechnology, various nanostructured semiconductor materials such as metal oxides, nitrides and sulfides have been exploited as photocatalysts for photocatalytic degradation of organic pollutants. 6 Therefore, lots of efforts have been devoted to extend the absorption edge of TiO 2 , such as doping of TiO 2 with metallic or nonmetallic elements to increase the visible light absorbance, [7][8][9] and coupling with other semiconductors to increase the separation efficiency of photogenerated electron-hole pairs during photocatalysis. However, with a bandgap of 3.2 eV, TiO 2 could only utilize radiation with wavelength less than 390 nm, which only takes 5% of the solar light.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of a mpg-C₃N₄/TiO₂heterojunction photocatalyst with enhanced visible light photoactivity toward organic pollutant degradation

Xue

Zhou

et al. 2015

RSC Adv.

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A facile hard template approach has been developed to prepare mpg-C 3 N 4 /TiO 2 composites using SiO 2 nanoparticles as hard template and cyanamide as precursor. The samples were well characterized by X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). The results demonstrated that TiO 2 nanoparticles sized 5-10 nm were distributed on the surface of mpg-C 3 N 4 to form the mpg-C 3 N 4 /TiO 2 heterojunction photocatalyst. In this way, the mpg-C 3 N 4 /TiO 2 heterojunction catalysts have a porous structure and large surface areas, which increase the contact area of pollutants. Rhodamine B (RhB) was carried out as a representative organic pollutant to evaluate the photocatalytic activity of samples under visible light irradiation. The results showed that the as-prepared mpg-C 3 N 4 /TiO 2 heterojunction catalysts significantly enhanced the visible photocatalytic activity compared to pure mpg-C 3 N 4 and the degradation rate was 1.6 times higher than that of pure mpg-C 3 N 4 . The increased photocatalytic activity of mpg-C 3 N 4 /TiO 2 heterojunction can be attributed to the formation of the heterojunction between mpg-C 3 N 4 and TiO 2 , which suppresses the recombination of photoinduced electron-hole pairs. Furthermore, based on systematic characterizations and discussions, a possible photocatalytic mechanism for the excellent

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The effect of milling atmospheres on photocatalytic property of Fe-doped TiO2 synthesized by mechanical alloying

Cited by 30 publications

References 31 publications

A Green Route to Produce Adipic Acid on TiO₂–Fe₂O₃ Nanocomposites

A Green Route to Produce Adipic Acid on TiO₂–Fe₂O₃ Nanocomposites

Formation of ZnO/Ni<sub>0.6</sub>Zn<sub>0.4</sub>O Mixture Using Mechanical Milling of Zn-NiO

Facile fabrication of a mpg-C₃N₄/TiO₂heterojunction photocatalyst with enhanced visible light photoactivity toward organic pollutant degradation

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The effect of milling atmospheres on photocatalytic property of Fe-doped TiO2 synthesized by mechanical alloying

Cited by 30 publications

References 31 publications

A Green Route to Produce Adipic Acid on TiO2–Fe2O3 Nanocomposites

A Green Route to Produce Adipic Acid on TiO2–Fe2O3 Nanocomposites

Formation of ZnO/Ni<sub>0.6</sub>Zn<sub>0.4</sub>O Mixture Using Mechanical Milling of Zn-NiO

Facile fabrication of a mpg-C3N4/TiO2heterojunction photocatalyst with enhanced visible light photoactivity toward organic pollutant degradation

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Product

Resources

About

A Green Route to Produce Adipic Acid on TiO₂–Fe₂O₃ Nanocomposites

A Green Route to Produce Adipic Acid on TiO₂–Fe₂O₃ Nanocomposites

Facile fabrication of a mpg-C₃N₄/TiO₂heterojunction photocatalyst with enhanced visible light photoactivity toward organic pollutant degradation