naa a22 4500 510820514 CHVBK 20180411083529.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11814-013-0146-0 doi (NATIONALLICENCE)springer-10.1007/s11814-013-0146-0 Hydrothermal synthesis of one-dimensional tungsten oxide nanostructures using cobalt ammonium sulfate as a structure-directing agent [Elektronische Daten] [Shanmugasundaram Rajagopal, Hae-Min Lee, Kangtaek Lee, Chang-Koo Kim] Hydrothermal synthesis of one-dimensional tungsten oxide nanostructures was performed using cobalt ammonium sulfate as a structure-directing agent, and the effect of the concentration of cobalt ammonium sulfate on the characteristics of the tungsten oxide nanostructures was investigated. XRD measurements showed that hexagonal tungsten oxide (h-WO3) structures were obtained at a higher concentration of cobalt ammonium sulfate (0.2 M), while cubic tungsten oxide (c-WO3) structures were obtained at a lower concentration of cobalt ammonium sulfate (0.01M). Mixed structures of h-WO3 and c-WO3 were observed at an intermediate concentration of cobalt ammonium sulfate. Morphological studies revealed that h-WO3 appeared as nanowires with a diameter of about 40 nm and an average length of 1 μm. c-WO3 was shaped in pillar-like nanorods with a diameter of about 30 nm. A red-shift in the UV/Vis absorption peak was observed with different phases of tungsten oxide nanostructures. Korean Institute of Chemical Engineers, Seoul, Korea, 2013 Hydrothermal nationallicence Tungsten Oxide nationallicence Nanostructures nationallicence Structure-directing Agent nationallicence Rajagopal Shanmugasundaram Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, 443-749, Suwon, Korea aut Lee Hae-Min Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, 443-749, Suwon, Korea aut Lee Kangtaek Department of Chemical and Biomolecular Engineering, Yonsei University, 120-749, Seoul, Korea aut Kim Chang-Koo Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, 443-749, Suwon, Korea aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/10(2013-10-01), 1833-1835 0256-1115 30:10<1833 2013 30 11814 https://doi.org/10.1007/s11814-013-0146-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-013-0146-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rajagopal Shanmugasundaram Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, 443-749, Suwon, Korea aut NATIONALLICENCE 700 1- Lee Hae-Min Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, 443-749, Suwon, Korea aut NATIONALLICENCE 700 1- Lee Kangtaek Department of Chemical and Biomolecular Engineering, Yonsei University, 120-749, Seoul, Korea aut NATIONALLICENCE 700 1- Kim Chang-Koo Department of Chemical Engineering and Division of Energy Systems Research, Ajou University, 443-749, Suwon, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/10(2013-10-01), 1833-1835 0256-1115 30:10<1833 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer