Journal ArticleDOI
Visible light photocatalysis in transition metal incorporated titania-silica aerogels
TLDR
Transition metal salts were added to aerogels of TiO2-SiO2 mixtures as mentioned in this paper, and the resulting materials had very high surface areas (600-1000 m2/g) and pore volumes (1-4 cm3/g).Abstract:
Transition metal salts were added to aerogels of TiO2–SiO2 mixtures. The resulting M–TiO2–SiO2 (M = transition metal, in general present in the form of oxides) materials had very high surface areas (600–1000 m2/g) and pore volumes (1–4 cm3/g), and contained highly dispersed transition metal oxides. Several samples were active photocatalysts for acetaldehyde oxidation to carbon dioxide using visible light; in particular chromium, cobalt, and nickel. These intimate aerogel mixtures were only active when SiO2 was present (i.e. M–TiO2 aerogels were not). High oxidation states of the transition metal ions (e.g. Cr6+, Co3+) appear to be important in bringing about visible light photocatalyst activity.read more
Citations
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Photoinduced reactivity of titanium dioxide
TL;DR: In this paper, photo-induced superhydrophilicity was used on the surface of a wide-band gap semiconductor like titanium dioxide (TiO 2 ) for photocatalytic activity towards environmentally hazardous compounds.
Journal ArticleDOI
Carbon Nanotube−Inorganic Hybrids
TL;DR: In Situ Synthesis Directly on the CNT Surface, Properties and Potential Applications of CNT-Inorganic Hybrids 1368, and Comparison of Synthesis Techniques 1368.
Journal ArticleDOI
Visible-light-driven nitrogen-doped TiO2 photocatalysts: effect of nitrogen precursors on their photocatalysis for decomposition of gas-phase organic pollutants
TL;DR: In this paper, a spray pyrolysis from a mixed aqueous solution containing TiCl4 and an N-precursor (urea, guanidine, or ammonium fluoride) was used to synthesize N-doped TiO2 powders.
Journal ArticleDOI
Photocatalytic Degradation of Rhodamine B over Pb3Nb4O13/Fumed SiO2 Composite under Visible Light Irradiation
Xiukai Li,Jinhua Ye +1 more
TL;DR: In this article, a deposition-precipitation method for rhodamine B (RhB) photodegradation under visible light irradiation was proposed, and the kinetic analysis demonstrated that the completely de-ethylated product of rhB can be more easily degraded than rhB, and thus, the N-de-ethylation process is the rate-limited step of RhB photodegrading over Pb3Nb4O13/fumed SiO2 composites.
Journal ArticleDOI
Enhanced visible light-induced photoelectrocatalytic degradation of phenol by carbon nanotube-doped TiO2 electrodes
TL;DR: In this paper, a modified sol-gel method was used to prepare titanium dioxide and multi-walled carbon nanotube (CNT) composites that were subsequently deposited onto indium tin oxide (ITO) conductive glass plates.
References
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Journal ArticleDOI
Visible-Light Photocatalysis in Nitrogen-Doped Titanium Oxides
TL;DR: Film and powders of TiO2-x Nx have revealed an improvement over titanium dioxide (TiO2) under visible light in optical absorption and photocatalytic activity such as photodegradations of methylene blue and gaseous acetaldehyde and hydrophilicity of the film surface.
Journal ArticleDOI
Photocatalytic activity of wox-tio2 under visible light irradiation
TL;DR: In this article, a new photocatalyst (WOx-TiO2) powder was prepared by a sol-gel method by extending light absorption of the TiO2-based photocatalysts toward the visible light range and eliminating the rapid recombination of excited electrons/holes during photoreaction.
Journal ArticleDOI
Enhanced Photocatalytic Performance of Titania-Based Binary Metal Oxides: TiO2/SiO2 and TiO2/ZrO2
TL;DR: In this paper, a comparison of their catalyst compositions with literature in this area suggests that the increase in activity due to the addition of silica or zirconia may be a result of higher surface acidity.
Journal ArticleDOI
Visible Light Driven V-Doped TiO2 Photocatalyst and Its Photooxidation of Ethanol
Sarah Klosek,Daniel Raftery +1 more
TL;DR: In this paper, a vanadium-doped, supported TiO2 photocatalyst is presented which is quite active using visible (396−450 nm) light, and the oxidation of ethanol over this catalyst was studied using 13C solid-state NMR methods that demonstrated that this catalyst photooxidizes ethanol to produce mostly carbon dioxide with small amounts of acetaldehyde, formic acid, and carbon monoxide under visible irradiation.
Journal ArticleDOI
Preparation of Polycrystalline TiO2 Photocatalysts Impregnated with Various Transition Metal Ions: Characterization and Photocatalytic Activity for the Degradation of 4-Nitrophenol
A. Di Paola,Giuseppe Marcì,Leonardo Palmisano,Mario Schiavello,Kohei Uosaki,S. Ikeda,Bunsho Ohtani +6 more
TL;DR: A set of polycrystalline TiO2 photocatalysts loaded with various ions of transition metals (Co, Cr, Cu, Fe, Mo, V, and W) were prepared by using the wet impregnation method.
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