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The coaction of the sub-band and doped nitrogen on visible light photocatalytic activity of N-doped TiO(2) was also investigated. The electron spin resonance spectra measured under laser irradiation (λ = 532 nm) indicate that the doped nitrogen may contribute to stabilize the trapping electron center, i.e. surface oxygen vacancy (V(o ...

 · Photoactivity of Polycrystalline α ‐ Fe 2 O 3 Electrodes Doped with Group IVA Elements. John H. Kennedy 1, Menahem Anderman 1 and Ruth Shinar 1 © 1981 ECS - …

 · In addition, both pristine and doped electrodes can be subsequently modified with gold nanoparticles, inducing a further enhancement of the electrode photoactivity in …

 · Our results demonstrate that both S-doped AC are photoactive and this photoactivity is even higher than that of TiO 2. Comparison of the kinetics results in Table …

 · ABSTRACT The photoelectrochemical activity of the PbTiO 3 film photocathode deposited on indium tin oxide-coated quartz substrate was significantly improved through modifying the film surface by both the Fe (III) doping and grafting.

 · plantation were developed to prepare nitrogen doped (N-doped) TiO 2 [29]. Sintering the metal oxide with urea at 200–400 °C for ∼2 h is found to be a conventional method of obtaining N-doped metal oxide. This method has been widely used for N-doping of solid acids or metal oxides, such as H 2Ti 4O 9, NaNbO 3,H 2Ta 2O 6 and KSbWO 6 …

 · Photoactivity of alpha-Fe2O3 electrodes in aqueous electrolytes has been reported by several investigators. Performance in photoelectrochemical cells depends on …

 · Journal of The Electrochemical Society Photoactivity of Polycrystalline α ‐ Fe 2 O 3 Electrodes Doped with Group IVA Elements John H. Kennedy1, Menahem Anderman1 and Ruth Shinar1 © 1981 ECS - The Electrochemical Society Journal of The Electrochemical Society, Volume 128, Number 11 Citation John H. Kennedy et al 1981 …

A series of electrochemical, photoelectrochemical and impedance spectroscopy measurements were employed to elucidate the cause of the improved photoactivity of the Ti-doped hematite thin films. This performance enhancement was a combination of improved bulk properties (hole collection length) and surface properties (water oxidation efficiency).

 · Abstract A composite of g-C 3 N 4 with visible-light photoactive S-doped carbon was synthesized. Synergistic effects in surface chemistry and electrical conductivity, and a decrease in the band gap ( Eg, …

 · The room temperature powder XRD patterns of the parent and the N-doped materials are recorded for phase confirmation. The powder patterns of the KAW and the KAWN are identical (Fig. 2a) [].Similarly, the powder patterns of the KCW and the KCWN are also alike (Fig. 2b) [].Nevertheless, a close examination of the d-spacing shows a …

 · The enhancement of the photocatalytic activity of the doped samples should therefore be due to the electron transfer at the interfaces between different crystalline structures [ 9, 10, 12 ]. In particular the (Ce 3+ /Ce 4+) redox pair could act as an electron scavenger that traps the bulk electrons in semiconductor modifying the band gap [ 15 ].

 · According to the literature, W-doped BaTiO 3 was synthesized for the first time in this study. Tetracycline is one of the most widely used antibiotics for infection treatment . …

 · The photocurrent of Zr doped α-Fe O photoanode was further increased by ZF-5/N photoanode, which was about 1.45 mA cm @ 1.23 V vs. RHE. The enhancement in the photocurrent density of ZF-5/N photoanode is due to the increased light absorption with higher electrical conductivity.

 · 10.1021/jacs.0c01416 Abstract The association of an electron-rich substrate with an electron-accepting molecule can generate a new molecular aggregate in the ground state, called an electron donor-acceptor (EDA) complex. Even when the two precursors do not absorb visible light, the resulting EDA complex often does.

 · In the present study, we investigated the effect of cerium doping in zinc oxide matrix, used as photoactive material. Cerium ions into the matrix of ZnO can act like a 'trap' for the electrons, lowering the e− / h+ recombination rate and so increasing the photocatalytic efficiency of the ZnO.

Scanning electron microscopy was used to study the morphology of TiO 2 nanotube layers doped by gold nanoparticles. Boosted photocatalytic performances on the degradation of an azo dye were obtained by using …

Photoactivity of doped α Fe2O3 electrodes. Solar Energy Materials, 1982. Ruth Shinar. Download Download PDF. Full PDF Package Download Full PDF Package. This Paper. A short summary of this paper. 37 Full PDFs related to this paper. Read Paper. Download Download PDF.

 · Hierarchical porous carbon fabricated from biomass provides an effective support for catalysts. Nitrogen doped TiO2 particles (50 nm in size) synthesized from titanium tetraethoxide were loaded uniformly on the porous carbons carbonized from Zizania latifolia leaves by a sol–gel method. X-Ray diffraction and Auger Electronic Spectrometer …

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 · The photoactivity of neodymium doped and undoped titania (Fig. 10) was studied through degradation of aqueous solution of methylene blue under exposure to UV light. The intensity of the absorbance of methylene blue decreased after UV irradiation in presence of titania, there was no major change observed in the shape of the spectrum.

 · Both the doped and undoped photoanodes exhibit a prompt, reasonably reversible and stable photocurrent produced under each illumination and its quick …

 · The physicochemical properties were characterized, indicating that the crystallite surface area increased after both first hydrothermal (FH) V impregnation and second hydrothermal (SH) N implantation, whereas mesoporous framework shrinkage and enlargement resulted from FH and SH, respectively.

 · The increased dispersion of the contour distribution of the HOMO and LUMO brought by doping facilitates the enhancement of the carrier mobility, while the noncoplanar HOMO and LUMO favor the separation of photogenerated electron–hole pairs.

 · The generation of surface charge carriers in N-doped TiO2 under various types of irradiation has been investigated by electron paramagnetic resonance using an approach consisting in scavenging surface migrated electrons and holes using oxygen and hydrogen, respectively. N-doped TiO2, which is moderately active in photocatalytic processes under …

Photoactivity of doped α Fe2O3 electrodes

 · The photocatalytic activity under UV light irradiation decreased due to shielding of the catalyst active area by excessive amount of dye adsorbed. Conversely, the photocatalytic activity of the Ce and Nd doped TiO 2 increased under visible light irradiation by 1.2 times as a result of the dye photosensitization effect.