Preparation and characterization of Fe-doped TiO2 nanoparticles as a support for a high performance CO oxidation catalyst

Yu, Sungju; Yun, Hongseok; Lee, David Minzae; Yi, Jongheop

doi:10.1039/c2jm30360d

Cited by 80 publications

(34 citation statements)

References 47 publications

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“…Furthermore, the Raman bands of 1 wt % Cu‐doped PbTiO 3 are broadened and shifted to higher wavenumbers relative to the bands of neat PbTiO 3 . Generally, shifts in Raman bands are caused by changes in the structure, particle size, nature of the defects, and so on 31. In this case, shifting was caused by changes in the crystal structure resulting from the introduction of copper atoms, which led to distortion of the PbTiO 3 lattice structure.…”

Section: Resultsmentioning

confidence: 99%

Fabrication, Characterization, and Photoelectrochemical Properties of Cu‐Doped PbTiO₃ and Its Hydrogen Production Activity

Reddy

Parida

2013

ChemCatChem

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We report herein the fabrication of visible‐light responsive n‐type PbTiO3 by a combustion method and p‐type Cu‐doped PbTiO3 by an impregnation method to improve hydrogen production activity. Copper was doped into the PbTiO3 lattice up to 1 wt %; any further increase in the loading resulted in the formation of CuO on the surface of the sample. Photoluminescence confirmed that 1 wt % Cu‐doped PbTiO3 effectively suppressed the defects in PbTiO3, which helped to reduce the recombination rate of the photoinduced charge carriers. The prepared PbTiO3 photocatalyst behaves as an n‐type semiconductor, whereas 1 wt % Cu‐doped PbTiO3 behaves as a p‐type semiconductor. The photocatalytic hydrogen production activity of PbTiO3 increased with increasing Cu content up to 1 wt % and thereafter decreased upon further loading. The 1 wt % Cu‐doped PbTiO3 sample showed higher activity for hydrogen liberation than pristine PbTiO3 (2.5 times) and all of the other CuO‐loaded samples. The energy conversion efficiency of 1 wt % Cu‐doped PbTiO3 was 5.95 % for hydrogen production under visible‐light irradiation. The enhanced hydrogen production activity of Cu‐doped PbTiO3 was discussed on the basis of optimum copper doping, photoluminescence intensity, and their band‐edge positions. However, the higher activity of CuO‐loaded (>1 wt %) PbTiO3 relative to that of neat PbTiO3 is perhaps a result of the extensive light absorption properties of the CuO nanoparticles, which help to generate more electron–hole pairs on the surface.

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Section: Resultsmentioning

confidence: 99%

Fabrication, Characterization, and Photoelectrochemical Properties of Cu‐Doped PbTiO₃ and Its Hydrogen Production Activity

Reddy

Parida

2013

ChemCatChem

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“…4 shows the EPR spectra of CuO-NPAC at different annealing temperatures. However, the intensities of the signals were very weak, attributed to a low concentration of oxygen vacancies and lattice defects in the CuO-NPAC matrix 43 . Fig.…”

Section: Epr Spectra Of Npac and Cuo-npac 400mentioning

confidence: 99%

Hydroxyl radical generation by cactus-like copper oxide nanoporous carbon catalysts for microcystin-LR environmental remediation

Karthikeyan

Dionysiou

Lee

et al. 2016

Catal. Sci. Technol.

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Copper oxide supported on nanoporous activated carbon (CuO-NPAC) is reported for the aqueous phase catalytic degradation of cyanotoxin microcystin-LR (MC-LR). The loading and spatial distribution of CuO throughout the NPAC matrix strongly influences catalytic efficiency. CuO-NPAC synthesis was optimized with respect to the copper loading and thermal processing, and the physicochemical properties of the resulting materials characterized by XRD, BET, TEM, SEM, EPR, TGA, XPS and FT-IR spectroscopy. EPR spin trapping and fluorescence spectroscopy evidenced in situ • OH, formation via H 2 O 2 over CuO-NPAC as the catalytically relevant oxidant. The impact of reaction conditions, notably CuO-NPAC loading, H 2 O 2 concentration and solution pH, are discussed in relation to the reaction kinetics for MC-LR remediation.

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“…Finding novel photocathalytic semiconductor materials that absorb lower energy photons, in the visible and infrared regions of the solar spectrum, would allow to use a wider portion of the solar spectrum and as consequence increasing the photocatalytic efficiency. Several studies have reported the red-shift of the band gap of TiO 2 employing several approaches such as doping with diverse metals (e.g., V [5], Cr [6], Fe [7], etc); doping with non metallic ions (e.g., N [8], C [9]); dye sensitization [10]; mixing with semiconductor quantum dots (e.g., CdS [11], PbSe [12], etc). More recently, oxygen deficient titanium dioxide, represented as TiO x , has been reported as an effective way to extend the light absorption of TiO 2 based materials into the visible region of the electromagnetic spectrum, due to the fact the energies of localized states are (0.75-1.18 eV) below the conduction band minimum [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Visible and infrared photocatalytic activity of TiO thin films prepared by reactive sputtering

Zapata‐Torres

Hernández-Rodríguez

Mis-Fernández

et al. 2015

Materials Science in Semiconductor Processing

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Preparation and characterization of Fe-doped TiO2 nanoparticles as a support for a high performance CO oxidation catalyst

Cited by 80 publications

References 47 publications

Fabrication, Characterization, and Photoelectrochemical Properties of Cu‐Doped PbTiO₃ and Its Hydrogen Production Activity

Fabrication, Characterization, and Photoelectrochemical Properties of Cu‐Doped PbTiO₃ and Its Hydrogen Production Activity

Hydroxyl radical generation by cactus-like copper oxide nanoporous carbon catalysts for microcystin-LR environmental remediation

Visible and infrared photocatalytic activity of TiO thin films prepared by reactive sputtering

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Preparation and characterization of Fe-doped TiO2 nanoparticles as a support for a high performance CO oxidation catalyst

Cited by 80 publications

References 47 publications

Fabrication, Characterization, and Photoelectrochemical Properties of Cu‐Doped PbTiO3 and Its Hydrogen Production Activity

Fabrication, Characterization, and Photoelectrochemical Properties of Cu‐Doped PbTiO3 and Its Hydrogen Production Activity

Hydroxyl radical generation by cactus-like copper oxide nanoporous carbon catalysts for microcystin-LR environmental remediation

Visible and infrared photocatalytic activity of TiO thin films prepared by reactive sputtering

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Product

Resources

About

Fabrication, Characterization, and Photoelectrochemical Properties of Cu‐Doped PbTiO₃ and Its Hydrogen Production Activity

Fabrication, Characterization, and Photoelectrochemical Properties of Cu‐Doped PbTiO₃ and Its Hydrogen Production Activity