Photocatalytic activity of sol–gel derived TiO2 co-doped with iron and niobium

Estrellan, Carl Renan; Salim, Chris; Hinode, Hirofumi

doi:10.1007/s11144-009-0061-x

Cited by 31 publications

(14 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fe:Nb co-doped and undoped TiO 2 (labeled as SG-TiO 2 ) were prepared using the temperature-controlled sol-gel process described in literature [11]. For the co-doped sample, the volume of TiO 2 precursor (titanium tetraisopropoxide) and weight of metal sources (ferric nitrate and ammonium niobium oxalate) were pre-determined to obtain a TiO 2 photocatalyst product containing 0.25 mol% Fe:Nb (1:1), labeled as Fe:Nb-TiO 2 .…”

Section: Synthesis and Characterization Of Fe And Nb Co-doped Photocamentioning

confidence: 99%

Photocatalytic decomposition of perfluorooctanoic acid by iron and niobium co-doped titanium dioxide

Estrellan

Salim

Hinode

2010

Journal of Hazardous Materials

Self Cite

View full text Add to dashboard Cite

Section: Synthesis and Characterization Of Fe And Nb Co-doped Photocamentioning

confidence: 99%

Photocatalytic decomposition of perfluorooctanoic acid by iron and niobium co-doped titanium dioxide

Estrellan

Salim

Hinode

2010

Journal of Hazardous Materials

Self Cite

View full text Add to dashboard Cite

“…Also, ZnO doped with Cr, Mn and Fe has showed novel attention due to the strong correlation between the structural, optical, and magnetic properties [23]. Doping with various amount of Fe 3+ not only enhances electron-hole pair separation by decrease the band gap to make advantages of shifting the absorption to the visible light spectrum, but also decrease the average grain size [24,25]. As reported in the literature, the presence of more than one valence states on transition metal ion suggests that polaronic conduction is attributed to a hopping mechanism of electrons from low valence state to the high valance one [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Electrical, dielectric and photocatalytic properties of Fe-doped ZnO nanomaterials synthesized by sol gel method

Cherifi

Chaouchi

Lorgoilloux

et al. 2016

PAC

View full text Add to dashboard Cite

Fe-doped ZnO nanoparticles were synthesized by sol gel technique. Fine-scale and single phase hexagonal wurtzite structure in all samples were confirmed by SEM and XRD, respectively. The band gap energy depends on the amount of Fe and was found to be in the range of 3.11-2.53 eV. The electric and dielectric properties were investigated using complex impedance spectroscopy. AC conductivity data were correlated with the barrier hopping (CBH) model to evaluate the binding energy (W m ), the minimum hopping distance (R min ) and the density of states at Fermi level, N(E F ). Fe doping in ZnO also improved the photocatalytic activity. Thus, the sample Zn 0.95 Fe 0.05 O showed high degradation potential towards methylene blue (MB), i.e. it degrades 90% of BM in 90 min under UV light.

show abstract

“…In addition, concentration and distribution of dopant ions in TiO 2 are factors that must be considered for a good photocatalytic performance [13]. The incorporation of two types of cations into TiO2 lattice and its photocatalytic performance has been reported in several studies [14,15]. Estrellan et al [14] reported that when the TiO2 is co-doped with iron and niobium, the photocatalytic efficiency is improved due to synergistic actions between the doping species, which favor the e−/h+ generation and reduce the recombination rate.…”

mentioning

confidence: 99%

Enhanced Photocatalytic Activity of Titania by Co-Doping with Mo and W

et al. 2018

View full text Add to dashboard Cite

Various W and Mo co-doped titanium dioxide (TiO2) materials were obtained through the EISA (Evaporation-Induced Self-Assembly) method and then tested as photocatalysts in the degradation of 4-chlorophenol. The synthesized materials were characterized by thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Raman spectroscopy (RS), N2 physisorption, UV-vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The results showed that the W-Mo-TiO2 catalysts have a high surface area of about 191 m2/g, and the presence of an anatase crystalline phase. The co-doped materials exhibited smaller crystallite sizes than those with one dopant, since the crystallinity is inhibited by the presence of both species. In addition, tungsten and molybdenum dopants are distributed and are incorporated into the anatase structure of TiO2, due to changes in red parameters and lattice expansion. Under our experimental conditions, the co-doped TiO2 catalyst presented 46% more 4-chlorophenol degradation than Degussa P25. The incorporation of two dopant cations in titania improved its photocatalytic performance, which was attributed to a cooperative effect by decreasing the recombination of photogenerated charges, high radiation absorption capacity, high surface areas, and low crystallinity. When TiO2 is co-doped with the same amount of both cations (1 wt.%), the highest degradation and mineralization (97% and 74%, respectively) is achieved. Quinones were the main intermediates in the 4-chlorophenol oxidation by W-Mo-TiO2 and 1,2,4-benzenetriol was incompletely degraded.

show abstract

Photocatalytic activity of sol–gel derived TiO2 co-doped with iron and niobium

Cited by 31 publications

References 16 publications

Photocatalytic decomposition of perfluorooctanoic acid by iron and niobium co-doped titanium dioxide

Photocatalytic decomposition of perfluorooctanoic acid by iron and niobium co-doped titanium dioxide

Electrical, dielectric and photocatalytic properties of Fe-doped ZnO nanomaterials synthesized by sol gel method

Enhanced Photocatalytic Activity of Titania by Co-Doping with Mo and W

Contact Info

Product

Resources

About