Author: "Lichao Jia" / Journal: applied physics letters - Searchworks@Jio Institute Digital Library Search Results

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Start Over Author "Lichao Jia" Journal applied physics letters

Author: Zongbao Li, Bo Chi, Congcong Wu, Jian Pu, Song Han, Li Jian, Lichao Jia, and Yuanyuan Li
Subjects: Anatase, Physics and Astronomy (miscellaneous), Absorption spectroscopy, Chemistry, Inorganic chemistry, Doping, Physics::Optics, Crystal growth, Condensed Matter::Materials Science, Physics::Atomic and Molecular Clusters, Density of states, Photocatalysis, Hydrothermal synthesis, Physical chemistry, Density functional theory
Abstract: The density of states and optical properties of N, S, and (N, S)-doped anatase TiO2 are calculated based on the density functional theory. The results indicate that the doping S atoms occupy the Ti-atom sites in anatase TiO2 lattice. The mixing of O 2p, N 2p, S 3p, and Ti 3d states in the forbidden gap of (N, S)-codoped TiO2 can result in the higher visible-light photocatalytic activities than those monodoped TiO2. For comparison, (N, S)-codoped TiO2 was also synthesized by one-step hydrothermal method, and the optical absorption spectra obtained by experiments verified the reliability of our calculation.
Published: 2011
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Author: Weiping Cai, Hongqiang Wang, and Lichao Jia
Subjects: Materials science, Physics and Astronomy (miscellaneous), business.industry, Doping, Inorganic chemistry, chemistry.chemical_element, Condensed Matter::Materials Science, Colloid, Semiconductor, chemistry, Chemical engineering, Condensed Matter::Superconductivity, Monolayer, Surface modification, Condensed Matter::Strongly Correlated Electrons, Selectivity, Porosity, business, Palladium
Abstract: Based on a sol-gel technique and the colloidal monolayer template, ion-doped SnO2 ordered porous films were fabricated, and the corresponding gas-sensing properties were studied. The sensitivity to the given test gases strongly depends on the doping species and doping amount. Importantly, when the doping amount is 1% M, the Cr+3 and Pd+2 doped porous films demonstrate a greatly enhanced sensitivity and strong selectivity to ethanol and ammonia, respectively. The improved sensing properties are attributed to the doping-induced surface modification of the films. Such ion-doped porous films are expected to bring new opportunities for application of future porous film-based gas sensors.
Published: 2010
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Author: Lichao Jia, Congcong Wu, Yuanyuan Li, Song Han, Zongbao Li, Bo Chi, Jian Pu, and Li Jian
Subjects: *PHOTOCATALYSIS, *TITANIUM dioxide, *DENSITY functionals, *ABSORPTION spectra, *VALENCE (Chemistry), *ANISOTROPY
Abstract: The density of states and optical properties of N, S, and (N, S)-doped anatase TiO2 are calculated based on the density functional theory. The results indicate that the doping S atoms occupy the Ti-atom sites in anatase TiO2 lattice. The mixing of O 2p, N 2p, S 3p, and Ti 3d states in the forbidden gap of (N, S)-codoped TiO2 can result in the higher visible-light photocatalytic activities than those monodoped TiO2. For comparison, (N, S)-codoped TiO2 was also synthesized by one-step hydrothermal method, and the optical absorption spectra obtained by experiments verified the reliability of our calculation. [ABSTRACT FROM AUTHOR]
Published: 2011
Full Text: View/download PDF

Author: Lichao Jia, Weiping Cai, and Wang, Hongqiang
Subjects: *METAL ions, *SEMICONDUCTOR doping, *NITROGEN compounds, *SEMICONDUCTOR defects, *MONOMOLECULAR films
Abstract: Based on a sol-gel technique and the colloidal monolayer template, ion-doped SnO2 ordered porous films were fabricated, and the corresponding gas-sensing properties were studied. The sensitivity to the given test gases strongly depends on the doping species and doping amount. Importantly, when the doping amount is 1% M, the Cr+3 and Pd+2 doped porous films demonstrate a greatly enhanced sensitivity and strong selectivity to ethanol and ammonia, respectively. The improved sensing properties are attributed to the doping-induced surface modification of the films. Such ion-doped porous films are expected to bring new opportunities for application of future porous film-based gas sensors. [ABSTRACT FROM AUTHOR]
Published: 2010
Full Text: View/download PDF

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