Iron doped TiO2 films and their photoactivity in nitrobenzene removal from water

Crışan, Maria; Mardare, Diana; Ianculescu, Adelina; Drăgan, Nicolae; Niţoi, Ines; Crışan, D.; Voicescu, Mariana; Todan, Ligia; Oancea, Petruţa; Adomniţei, Cătălin; Dobromir, Marius; Gabrovska, Margarita; Vasile, Bogdan Ștefan

doi:10.1016/j.apsusc.2018.05.124

Cited by 67 publications

(28 citation statements)

References 66 publications

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“…It is observed a reduction of 1 eV for the material Fe : Ti 0.1 in comparison with the pure TiO 2 (Fe : Ti 0) synthesized by the methodology of green chemistry assisted by ultrasound, which would allow to use more e ciently the solar radiation in heterogeneous photocatalytic processes for the degradation of organic pollutants. ese results relate to several recent research focused on the doping of titanium dioxide with Fe 3+ ions [56,[59][60][61]. Moradi et al [18] observed the decrease of the band gap with the increase of the relationship molar Fe : Ti in catalysts of TiO 2 doped with Fe 3+ using the technique sol-gel.…”

Section: Uv-vis Drssupporting

confidence: 71%

“…is means that the green synthesis method can lead to the creation of the product with agglomerates in the micrometric scale, for which irregular forms are observed, similar to what was reported by Arabi et al [31] for the green synthesis of TiO 2 using the extract of Moose and yme. e compositional analysis shows the separate peak of titanium (Ti, 4.508 keV), iron (Fe, 6.398 keV), oxygen (O, 0.523 keV), and other elements as Na, Ca, Si, Cl, and K, which come from the water used in the synthesis process [56]. Table 3 shows the atomic percentages obtained for each element by EDS, in addition to the impregnation e ciencies achieved for all prepared samples.…”

Section: Tem-saedmentioning

confidence: 99%

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Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Solano

Herrera

Maestre

et al. 2019

Journal of Nanotechnology

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Anatase TiO2 nanoparticles doped with iron ions have been synthesized via the green chemistry method using aqueous extract of lemongrass (Cymbopogon citratus) obtained from Soxhlet extraction and doped by wet impregnation. The TiO2 anatase phase has been doped with Fe3+ (0.05, 0.075, and 0.1 Fe3+ : Ti molar ratio) at 550°C and 350°C, respectively. The scanning electron microscopy with energy-dispersive X-ray (SEM-EDS) shows nanoparticle clusters and efficiencies of impregnations between 66.5 and 58.4% depending on the theoretical dopant amount. The electron transmission microscopy (TEM) reveals final particle sizes ranging between 7 and 26 nm depending on the presence or not of the dopant. The cathodoluminescence (CL) and photoluminescence (PL) studies of the doped and undoped nanoparticles show a luminescence signal attributed to surface oxygen vacancies (visible CL emission 380–700 nm and PL emission 350–800 nm); additionally, a decrease in emission intensity is observed due the inhibition of the recombination of the photogenerated electron-holes pairs; moreover, nanopowders were analyzed by UV-Vis spectrophotometry of diffuse reflectance, and the absorption edge of the Fe-TiO2 in comparison to undoped TiO2 is extended greatly toward the visible light. The six bands (A1g + 2B1g + 3Eg) found by Raman spectroscopy and the x-ray diffraction pattern (XRD) confirm that synthesized TiO2 is only anatase phase, which is commonly used as a catalyst in waste water treatment, specifically in heterogeneous photocatalytic processes.

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Section: Uv-vis Drssupporting

confidence: 71%

Section: Tem-saedmentioning

confidence: 99%

Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Solano

Herrera

Maestre

et al. 2019

Journal of Nanotechnology

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“…Fe 3+ has attracted considerable attention due to its half-filled d-electron configuration (3d5), while the ionic radius of Fe 3+ (0.064 nm) is close to that of Ti 4+ (0.068 nm), thus implying that Fe 3+ may be incorporated into the structure of the TiO 2 lattice. In recent studies, iron-doped titania nanoparticles and thin films were synthesized, characterized and tested for the degradation of methylene blue [30], phenol [31] and nitrobenzene [32] in water under visible irradiation. In other studies [33], a low-cost and easy procedure was established to synthesize an iron-doped titania, a cauliflower-like photocatalyst for the degradation of azodyes in water.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

et al. 2019

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This work examined the photocatalytic destruction of sulfamethoxazole (SMX), a widely used antibiotic, under simulated solar radiation using iron-doped titanium dioxide as the photocatalyst. Amongst the various iron/titania ratios examined (in the range 0%–2%), the catalyst at 0.04% Fe/TiO2 molar ratio exhibited the highest photocatalytic efficiency. The reaction rate followed pseudo-first-order kinetics, where the apparent kinetic constant was reduced as the initial concentration of SMX or humic acid increased. The photodecomposition of SMX was favored in natural pH but retarded at alkaline conditions. Unexpectedly, the presence of bicarbonates (in the range of 0.125–2 g/L) improved the removal of SMX, however, experiments conducted in real environmental matrices showed that process efficiency decreased as the complexity of the water matrix increased. The presence of sodium persulfate as an electron acceptor enhanced the reaction rate. However, only a small synergy was observed between the two individual processes. On the contrary, the addition of tert-butanol, a well-known hydroxyl radical scavenger, hindered the reaction, indicating the significant contribution of these radicals to the photocatalytic degradation of SMX. The photocatalyst retained half of its initial activity after five successive experiments.

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“…Metal oxide semiconductors have important practical significance in gas sensing, mainly because of good chemical reliability, real-time monitoring, and easy fabrication (Zhou et al, 2018b;Wei et al, 2019b). The basis of functional materials, including ZnO (Wang et al, 2019;Yoo et al, 2019), TiO 2 (Crişan et al, 2018;Meng et al, 2019), In 2 O 3 (Liu et al, 2018;Inyawilert et al, 2019), SnO 2 (Zhang et al, 2018;Zhou et al, 2018c;Li et al, 2019a), have been applied in gas sensing in the past for a long time. Among them, SnO 2 is one of the earliest metal oxides, due to its wide band gap, excellent physicochemical properties, and low-price for gas sensing (Uddin and Chung, 2015;Thanihaichelvan et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Cr2O3 Nanoparticle-Coated SnO2 Nanofibers and C2H2 Sensing Properties

Gao

Zhou

et al. 2019

Front. Mater.

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In this work, Cr 2 O 3 nanoparticles, and SnO 2 nanofibers were fabricated by a sol-gel process and an electrospinning method, respectively. Gas sensitive materials with high sensitivity to C 2 H 2 gas were obtained by coating Cr 2 O 3 nanoparticles on SnO 2 nanofibers. The prepared Cr 2 O 3 nanoparticle-coated SnO 2 nanofibers (Cr 2 O 3 NPs. coated SnO 2 NFs.) were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and the gas sensing behaviors to C 2 H 2 were studied. The Cr 2 O 3 NPs. coated SnO 2 NFs. exhibited low optimal operating temperature, high sensing response, excellent response-recovery time, and long-term stability to C 2 H 2. The optimal operating temperature of the measured material to 20 ppm C 2 H 2 was about 220 • C and the C 2 H 2 concentration had a good linear relationship with the response value when the concentration was 60 ppm. In addition, a reasonable gas sensing mechanism was proposed which may enhance the gas sensing performances for the Cr 2 O 3 NPs. coated SnO 2 NFs. to C 2 H 2. Keywords: Cr 2 O 3 nanoparticles, SnO 2 nanofibers, electrospinning, C 2 H 2 , sensing properties

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Iron doped TiO2 films and their photoactivity in nitrobenzene removal from water

Cited by 67 publications

References 66 publications

Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

Synthesis of Cr2O3 Nanoparticle-Coated SnO2 Nanofibers and C2H2 Sensing Properties

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Iron doped TiO2 films and their photoactivity in nitrobenzene removal from water

Cited by 67 publications

References 66 publications

Fe-TiO2 Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Fe-TiO2 Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

Synthesis of Cr2O3 Nanoparticle-Coated SnO2 Nanofibers and C2H2 Sensing Properties

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Product

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Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment

Fe-TiO₂ Nanoparticles Synthesized by Green Chemistry for Potential Application in Waste Water Photocatalytic Treatment