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Träfflista för sökning "WFRF:(Lejon Christian) srt2:(2007-2009)"

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1.	Fager, Christian, 1974, et al. (author) Voltage/Current mode class D amplifiers and their applications 2008 In: Proc. IEEE Radio Wireless Symposium (Workshop: Transmitter Design for High Power Efficiency: The path from device to advanced system architectures). Conference paper (other academic/artistic)
2.	Gustavsson, Ulf, 1975, et al. (author) Design of highly efficient, high output power, L-band class D-1 RF power amplifiers using GaN MESFET devices 2007 In: Proc. European Conference on Wireless Technologies. ; , s. 371-374 Conference paper (peer-reviewed)
3.	Mattsson, Andreas, et al. (author) Photodegradation of DMMP and CEES on zirconium doped titania nanoparticles 2009 In: Applied Catalysis B. - : Elsevier. - 0926-3373 .- 1873-3883. ; 92:3-4, s. 401-410 Journal article (peer-reviewed)abstract The structure and photocatalytic activity of Zr doped TiO2 nanocrystallites with a varying Zr content between 0 and 15 wt% prepared by an efficient and environmentally benign method has been Studied by vibrational spectroscopy, TEM and XRD. It is shown that the presence of Zr4+ ions stabilizes the anatase structure and delays phase transformation to rutile upon annealing as well as retarding grain coarsening. All TiO2 samples up to 13 wt% Zr doping concentration show better or similar photoreactivity compared to P25 (Degussa) for decomposition of adsorbed 2-chloroethyl ethyl sulphide (CEES) and dimethyl methylphosphonate (DMMP) in synthetic air at room temperature. The most efficient sample for photodegradation of both CEES and DMMP is shown to be titania doped with 6.8 wt% Zr. The photodegradation of CEES is faster than DMMP under the same experimental conditions. On the undoped TiO2 sample urea residues are detected spectroscopically. Much less is detected on the Zr doped samples. Mode resolved in situ FTIR surface spectroscopy enables distinction of CEES or DMMP, decomposition products as well as the influence of residues from the particle synthesis. This facilitates extraction of intra-comparable reaction rates. Possible explanations for the improved reactivity of the Zr doped titania are discussed.

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Type of publication: conference paper (2); journal article (1)

Type of content: peer-reviewed (2); other academic/artistic (1)

Author/Editor: Fager, Christian, 19 ... (2); Zirath, Herbert, 195 ... (2); Gustavsson, Ulf, 197 ... (2); Lejon, T. (2); Stengl, Václav (1); Österlund, Lars (1); show more...; Lejon, Christian (1); Andersson, Ola (1); Mattsson, Andreas (1); Almgren, B (1); Mashad Nemati, Hosse ... (1); Bakardjieva, Snejana (1); Oplustil, Frantisek (1); show less...

University: Chalmers University of Technology (2); Uppsala University (1)

Language: English (3)

Research subject (UKÄ/SCB): Engineering and Technology (2)

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