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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MoS2 as non-noble-metal co-catalyst for photocatalytic hydrogen evolution over hexagonal ZnIn2S4 under visible light irradiations
TL;DR: MoS2/ZnIn2S4 nanocomposites were prepared by impregnating the hydrothermally prepared hexagonal ZnIn 2S4 microspheres with an aqueous solution of (NH4)2MoS4, followed by a treatment in H2S flow at high temperatures to transform Mo(VI) to Mo(IV) as discussed by the authors.
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Gold‐Nanorod‐Photosensitized Titanium Dioxide with Wide‐Range Visible‐Light Harvesting Based on Localized Surface Plasmon Resonance
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Solvothermal synthesis of C–N codoped TiO2 and photocatalytic evaluation for bisphenol A degradation using a visible-light irradiated LED photoreactor
Xiaoping Wang,Teik-Thye Lim +1 more
TL;DR: In this paper, a highly visible-light photoactive carbon and nitrogen codoped TiO2 (CN-TiO2) was synthesized via a facile solvothermal method.
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Synthesis of titania/carbon nanotube heterojunction arrays for photoinactivation of E. coli in visible light irradiation
TL;DR: In this article, a vertically aligned TiO 2 /multi-wall carbon nanotube (MWNT) heterojunction arrays were synthesized and immobilized on Si(0, 0, 1) substrate as photocatalysts for inactivation of Escherichia coli bacteria.
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Reduced graphene oxide–TiO2 nanocomposite with high photocatalystic activity for the degradation of rhodamine B
Feng Wang,Kan Zhang +1 more
TL;DR: In this article, the reduced graphene oxide-TiOO 2 (RGOTiO 2 ) nanocomposites have been successfully synthesized through a facile hydrothermal reaction with minor modification using graphene oxide (GO) and commercial P25 as starting materials in an ethanol-water solvent, followed by calcining temperature at 400°C for 2h in Ar.
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.
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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.