Nanocrystalline N-Doped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:msub><mml:mtext>TiO</mml:mtext><mml:mtext>2</mml:mtext></mml:msub></mml:mrow></mml:math>Powders: Mild Hydrothermal Synthesis and Photocatalytic Degradation of Phenol under Visible Light Irradiation

Xu, Junna; Wang, Feng; Liu, Wenxiu; Cao, Wenbin

doi:10.1155/2013/616139

Cited by 13 publications

(12 citation statements)

References 46 publications

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“…The direct photolysis showed the lowest degradation of phenol in aqueous solution, with only 2.04% and 0% degradation under UV and visible light irradiations respectively. It is confirmed that phenol will not be degraded by visible light irradiation [50]. However, it could be seen that the concentration of phenol in aqueous solution decreased upon UV and visible light irradiations for 540 min with the presence of photocatalyst.…”

Section: Photocatalytic Activity Measurementsmentioning

confidence: 66%

Photodegradation of phenol by N-Doped TiO2 anatase/rutile nanorods assembled microsphere under UV and visible light irradiation

Mohamed

Salleh

Jaafar

et al. 2015

Materials Chemistry and Physics

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Section: Photocatalytic Activity Measurementsmentioning

confidence: 66%

Photodegradation of phenol by N-Doped TiO2 anatase/rutile nanorods assembled microsphere under UV and visible light irradiation

Mohamed

Salleh

Jaafar

et al. 2015

Materials Chemistry and Physics

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“…The binding energies of N 1s for sample T400 was detected at 396.8, 397.5, 398.7, and 399.8 eV. Previous studies suggested that the N 1s peak of the N-doped TiO 2 was commonly observed between 395 and 402 eV [15,17,[30][31][32][33][34]. The existence of the binding energy at 396.8, 397.5, 398.7, and 399.8 eV has confirmed the success of the N-doping in the TiO 2 lattice structure.…”

Section: X-ray Photoelectron Spectroscopy (Xps)mentioning

confidence: 89%

Structural characterization of N-doped anatase–rutile mixed phase TiO2 nanorods assembled microspheres synthesized by simple sol–gel method

Mohamed

Salleh

Jaafar

et al. 2015

J Sol-Gel Sci Technol

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In this study, N-doped anatase-rutile mixed phase TiO 2 nanorods assembled microspheres were synthesized via a direct and simple sol-gel method. The physical analysis via X-ray diffraction indicated that the prepared sample had a mixed phase of anatase and rutile TiO 2 . The morphology of the structure was observed with field emission scanning electron microscopy, transmission electron microscopy and atomic force microscopy, which showed that the formation of TiO 2 microspheres was constructed by TiO 2 nanorods or rice like structure nanorods. Besides, Fourier transform infrared analysis revealed that the presence of N 2 O 2 2-and NO -species in the spectra while XPS study indicated the incorporation of nitrogen as dopant in TiO 2 at binding energies of 396.8, 397.5, 398.7, and 399.8 eV. Furthermore, the optical properties determined by UV-Vis spectroscopy concluded that the prepared sample exhibited excellent optical responses to UV and visible region as well as being a potential material for degradation of hazardous water pollutants. The photocatalytic activity of the prepared TiO 2 exhibits excellent photodegradation of methylene blue under UV and visible light irradiation. Graphical AbstractKeywords N-doped TiO 2 nanorods Á Anatase/Rutile Á UV-visible irradiation Á Sol-gel preparation Á Structural characterization 1 Introduction

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“…The improvement of light harvesting capabilities under passive solar irradiation as well as the enhancement of activity and selectivity of TiO 2 -sensitised photoreactions remain the main goals for which this practice is employed. Doping strategies have been largely explored through the last three decades, including self-doping [2][3][4]; non-metal doping [5][6][7][8][9][10]; transitional metal doping [11][12][13][14][15][16][17][18][19][20][21][22][23][24]; metal, non-metal codoping [25][26][27][28][29][30][31][32][33]; and rare-earth metal doping [34,35]. The literature cited here is only representative of a few examples and by no means exhaustive.…”

Section: Introductionmentioning

confidence: 99%

A Combination of EPR, Microscopy, Electrophoresis and Theory to Elucidate the Chemistry of W- and N-Doped TiO2 Nanoparticle/Water Interfaces

Gorman

Rickaby

et al. 2021

Catalysts

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The doping of TiO2-based nanomaterials for semiconductor-sensitised photoreactions has been a practice extensively studied and applied for many years. The main goal remains the improvement of light harvesting capabilities under passive solar irradiation, that in the case of undoped TiO2 is limited and restricted to relatively low latitudes. The activity and selectivity of doped TiO2 photocatalysts are generally discussed on the basis of the modified band structure; energetics of intrinsic or extrinsic band gaps including trapping states; redox potentials of band edges, including band bending at solid/fluid interfaces; and charge carriers scavenging/transfer by/to adsorbed species. Electron (and hole) transfer to adsorbates is often invoked to justify the formation of highly reactive species (e.g., HO. from water); however, a complete description of the nanoparticle surface chemistry dictating adsorption/desorption events is often missing or overlooked. Here, we show that by employing a surface electrochemical triple-layer (TLM) approach for the nanoparticles/water interface, in combination with electron paramagnetic resonance spectroscopy (EPR), transmission electron microscopy and electrophoretic measurements, we can elucidate the surface chemistry of doped TiO2 nanoparticles and link it to the nature of the dopants. Exemplifying it for the cases of undoped, as well as W- and N-doped and codoped TiO2 nanoparticles, we show how surface charge density; surface, Stern and ζ potentials; surface acidity constants; and speciation of surface sites are influenced by the nature of the dopants and their loading.

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Nanocrystalline N-DopedTiO2Powders: Mild Hydrothermal Synthesis and Photocatalytic Degradation of Phenol under Visible Light Irradiation

Cited by 13 publications

References 46 publications

Photodegradation of phenol by N-Doped TiO2 anatase/rutile nanorods assembled microsphere under UV and visible light irradiation

Photodegradation of phenol by N-Doped TiO2 anatase/rutile nanorods assembled microsphere under UV and visible light irradiation

Structural characterization of N-doped anatase–rutile mixed phase TiO2 nanorods assembled microspheres synthesized by simple sol–gel method

A Combination of EPR, Microscopy, Electrophoresis and Theory to Elucidate the Chemistry of W- and N-Doped TiO2 Nanoparticle/Water Interfaces

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