Topic
Photocatalysis
About: Photocatalysis is a research topic. Over the lifetime, 67088 publications have been published within this topic receiving 2145233 citations. The topic is also known as: photocatalyst.
Papers published on a yearly basis
Papers
More filters
TL;DR: An oxide photocatalyst Bi2WO6 with corner-shared WO6 octahedral layered structure was synthesized and its band gap was determined to be 2.69 eV from UV-vis diffuse reflectance spectra as discussed by the authors.
Abstract: An oxide photocatalyst Bi2WO6 with corner-shared WO6 octahedral layered structure was synthesized. Its band gap was determined to be 2.69 eV from UV–vis diffuse reflectance spectra. The photocatalyst showed not only the activity for photocatalytic O2 evolution with the initial evolution rate of 2.0 μmol/h but also the activity of mineralizing both CHCl3 and CH3CHO contaminants under visible light irradiation. Meanwhile, wavelength dependence of CH3CHO decomposition was observed, which indicated that the photocatalytic activity of the photocatalyst was in good agreement with its light-absorption ability.
492 citations
TL;DR: Well-defined m-BiVO(4) nanoplates with exposed {001} facets have been synthesized by a facile hydrothermal route, without the use of any template or organic surfactant, and exhibit greatly enhanced activity in the visible-light photocatalytic degradation of organic contaminants and photocatalyst oxidation of water for O(2) generation.
491 citations
TL;DR: In this paper, a class of visible-light-activated TiO2 photocatalysts were prepared by direct hydrolysis of tetrabutyl titanate through iodine-doping.
Abstract: A novel class of visible-light-activated TiO2 photocatalysts were prepared by direct hydrolysis of tetrabutyl titanate through iodine-doping. When calcination temperature is at 673 K, these nanoparticles (mean diameter of ∼5 nm) show stronger absorption in the 400−550 nm range with a red shift in the band gap transition and significantly higher photocatalytic activity than pure TiO2 prepared by the same procedure and Degussa P-25 titania nanoparticles in aqueous phenol solution under visible light irradiation (λ > 400 nm). Furthermore, I-doped TiO2 (673 K) still showed pronounced photocatalytic activity under UV and visible light irradiation.
491 citations
TL;DR: In this article, surface-fluorinated anatase TiO 2 nanosheets with dominant {0,0,1} facets were fabricated by a simple hydrothermal route in a Ti(OC 4 H 9 ) 4 -HF-H 2 O mixed solution.
Abstract: Surface-fluorinated anatase TiO 2 nanosheets with dominant {0 0 1} facets were fabricated by a simple hydrothermal route in a Ti(OC 4 H 9 ) 4 -HF-H 2 O mixed solution. The atomic ratios of fluorine to titanium ( R F ) exhibit an obvious influence on the structures and photocatalytic activity of TiO 2 samples. In the presence of HF, TiO 2 nanosheets can be easily obtained. With increasing R F , the relative anatase crystallinity, average crystallite size, pore size and percentage of exposed {0 0 1} facets increase, contrarily, BET specific surface areas decrease. All fluorinated TiO 2 nanosheets exhibit much higher photocatalytic activity than Degussa P-25 TiO 2 (P25) and pure TiO 2 nanoparticles prepared in pure water due to the synergistic effect of surface fluorination and exposed {0 0 1} facets on the photoactivity of TiO 2 . Especially, at R F = 1, the fluorinated TiO 2 nanosheet exhibits the highest photocatalytic activity, and its photoactivity exceeds that of P25 by a factor of more than nine times.
490 citations
TL;DR: In this article, a 2D/2D g-C3N4/MnO2 heterostructured photocatalyst was synthesized via in situ growth of MnO2 nanosheets on the surface of G-C 3N4 nanolayers using a wet-chemical method.
Abstract: Constructing two-dimensional (2D) composites using layered materials is considered to be an effective approach to achieve high-efficiency photocatalysts. Herein, a 2D/2D g-C3N4/MnO2 heterostructured photocatalyst was synthesized via in situ growth of MnO2 nanosheets on the surface of g-C3N4 nanolayers using a wet-chemical method. The hybrid nanomaterial was characterized by a range of techniques to study its micromorphology, structure, chemical composition/states, and so on. The g-C3N4/MnO2 nanocomposite exhibited greatly improved photocatalytic activities for dye degradation and phenol removal in comparison to the single g-C3N4 or MnO2 component. On the basis of the electron paramagnetic resonance spectra, X-ray photoelectron spectra, and the Mott–Schottky measurements, we consider that a Z-scheme heterojunction was generated between the g-C3N4 nanosheets and MnO2 nanosheets, wherein the photoinduced electrons in MnO2 combined with the holes in g-C3N4, leading to enhanced charge carrier extraction and ut...
490 citations