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Synthesis of Co3O4 nanowire arrays supported on Ni foam for removal of volatile organic compounds.
Hui, K N,Yin, Cui-Lei,Hui, K S,Lee, J Y,Li, M,Lee, S K,Tsui, K L,Chao, C Y H,Kwong, C W American Scientific Publishers 2012 Journal of Nanoscience and Nanotechnology Vol.12 No.4
<P>Crystalline Co3O4 nanowire arrays freely supported on Ni foam are successfully synthesized using a template-free method. The effects of reaction time, concentration of reactants, and temperature on the morphology of the nanowires are studied. The results indicate that uniform Co3O4 nanowires could be synthesized at 90 degrees C, and a transformation of the samples' morphology from nanoparticles to nanowires to microrods is observed by controlling the concentration of the reactants. The well-ordered nanowires synthesized under the selected reaction conditions are composed of spinel Co3O4 with diameters of 500-580 nm and lengths of 6-8 microm. These nanowires show good catalytic activity for the ozone catalytic oxidation of toluene.</P>
Patel, Kamlesh,Negi, P S,Swarup, Ram,Kim, Jeong Hwan,Kang, Jin-Seob,Chow, Michael W K,Tsui, C M,Dressler, Erik,Shay, Wen-Tron,Li, Hua,Shan, Yueyan Springer-Verlag 2012 METROLOGIA -BERLIN- Vol.49 No.-
<P>A measurement comparison of complex reflection coefficient has been carried out among six national metrology laboratories in coaxial system at frequencies of 50 MHz, 2 GHz, 10 GHz and 18 GHz. Three 50 Ω coaxial mismatches (voltage standing wave ratios 1.2, 1.5 and 2.0) in 7 mm connectors have been measured for their complex reflection coefficients in the magnitude and phase form. The six laboratories participated are NPL India, KRISS Korea, SCL Hong Kong, CMS ITRI Taiwan, NMC Singapore and CSIR-NML South Africa (now NMISA). The National Physical Laboratory (India) acted as the pilot laboratory for the comparison. Good agreement between the values provided by the participating laboratories has been observed: the degrees of equivalence for all the values reported, with respect to the reference value and between pairs of laboratories, are less than their associated uncertainties, at a level of confidence of 95%.</P><P>Main text.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.</P><P>The final report has been peer-reviewed and approved for publication by APMP, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).</P>