Journal ArticleDOI
Low temperature preparation and visible light photocatalytic activity of mesoporous carbon-doped crystalline TiO2
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In this paper, a carbon-doped TiO2 photocatalyst was obtained by using glucose as a carbon source and was characterized by XRD, XPS, TEM, nitrogen adsorption, and UV-vis diffuse reflectance spectroscopy.Abstract:
A visible-light-active TiO2 photocatalyst was prepared through carbon doping by using glucose as carbon source. Different from the previous carbon-doped TiO2 prepared at high temperature, our preparation was performed by a hydrothermal method at temperature as low as 160 °C. The resulting photocatalyst was characterized by XRD, XPS, TEM, nitrogen adsorption, and UV–vis diffuse reflectance spectroscopy. The characterizations found that the photocatalyst possessed a homogeneous pore diameter about 8 nm and a high surface area of 126 m2/g. Comparing to undoped TiO2, the carbon-doped TiO2 showed obvious absorption in the 400–450 nm range with a red shift in the band gap transition. It was found that the resulting carbon-doped TiO2 exhibits significantly higher photocatalytic activity than the undoped counterpart and Degussa P25 on the degradation of rhodamine B (RhB) in water under visible light irradiation (λ > 420 nm). This method can be easily scaled up for industrial production of visible-light driven photocatalyst for pollutants removal because of its convenience and energy-saving.read more
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On the mechanism of enhanced photocatalytic activity of composite TiO2/carbon nanofilms
Dinko Chakarov,Raja Sellappan +1 more
TL;DR: In this paper, the authors have fabricated and analyzed well-defined model samples consisting of anatase and graphitic carbon with and without modifying the interface between them by a thin SiO(2) space layer.
Journal ArticleDOI
On the mechanism of enhanced photocatalytic activity of composite TiO2/carbon nanofilms
Raja Sellappan,Augustinas Galeckas,Vishnukanthan Venkatachalapathy,Andrej Yu. Kuznetsov,Dinko Chakarov +4 more
TL;DR: In this paper, the authors have fabricated and analyzed well-defined model samples consisting of anatase and graphitic carbon with and without modifying the interface between them by a thin SiO(2) space layer.
Journal ArticleDOI
Facile and Efficient Synthesis of Bismuth Nanowires for Improved Photocatalytic Activity
TL;DR: As-prepared bismuth nanowires exhibit excellent visible-light photocatalytic activities for the degradation of the organic pollutant Rhodamine B (RhB) and colorless bisphenol A (BPA) and the good recyclability of the Bi NWs on RhB photodegradation demonstrates the possibility of their practical applications.
Journal ArticleDOI
Synthesis of a solar photo and bioactive CNT–TiO2 nanocatalyst
TL;DR: In this article, a novel route for the synthesis of CNT-TiO2 hybrid nanostructures is reported based on a combination of sol-gel and arc discharge methods in a liquid.
Journal ArticleDOI
Improved performance of immobilized TiO2 under visible light for the commercial surfactant degradation: Role of carbon doped TiO2 and anatase/rutile ratio
TL;DR: In this article, the physicochemical characteristics of the synthesized composites (TiO2, CDT, and CDT/GAC) were determined in detail by X-ray diffraction, scanning electron microscopy, elemental mapping, Brunauer-Emmett-Teller, UV-Vis absorption and PL spectra.
References
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Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984)
TL;DR: Mise au point comportant des definitions generales et la terminologie, la methodologie utilisee, les procedes experimentaux, les interpretations des donnees d'adsorption, les determinations de l'aire superficielle, and les donnes sur la mesoporosite et la microporosite.
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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.
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Efficient photochemical water splitting by a chemically modified n-TiO2.
TL;DR: A chemically modified n-type TiO2 is synthesized by controlled combustion of Ti metal in a natural gas flame and performs water splitting with a total conversion efficiency of 11% and a maximum photoconversion efficiency of 8.35% when illuminated at 40 milliwatts per square centimeter.
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The Role of Metal Ion Dopants in Quantum-Sized TiO2: Correlation between Photoreactivity and Charge Carrier Recombination Dynamics
TL;DR: In this article, the presence of metal ion dopants in the TiO_2 crystalline matrix significantly influences photoreactivity, charge carrier recombination rates, and interfacial electron-transfer rates.
Journal ArticleDOI
Colloidal carbon spheres and their core/shell structures with noble-metal nanoparticles.
Xiaoming Sun,Yadong Li +1 more
TL;DR: Only amorphous silica and some colloidal polymer spheres can be routinely prepared with satisfactorily narrow size distributions, and surface modification almost unavoidable before use as supports or templates.