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Grandcolas M.,International Center for Young Scientists | Ye J.,Japan National Institute of Materials Science | Miyazawa K.,Japan National Institute of Materials Science
Ceramics International | Year: 2014

Titania nanotubes (TiNTs) functionalized with fullerenes (C60) have been successfully synthesized through a simple impregnation method using ethanol and toluene as co-solvents. The as-synthesized samples were characterized by X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM, TEM), Raman spectroscopy, and UV-vis spectroscopy. Differences in UV-vis light absorption of TiNTs samples loaded with 1%, 2% and 5% C 60 were attributed to excited states from the formation of fullerene aggregates. C60-sensitizing was found to effectively enhance the photocatalytic degradation of an organic molecule in the gas phase. Photocatalytic decomposition of isopropanol was carried out and showed high degradation in the visible region, where the TiNTs samples loaded with 5 wt% C60 offered the best activity. © 2013 Elsevier Ltd and Techna Group S.r.l. Source


Sanchez-Ballester N.M.,Japan National Institute of Materials Science | Sanchez-Ballester N.M.,Charles Sadron Institute | Rydzek G.,Japan National Institute of Materials Science | Rydzek G.,International Center for Young Scientists | And 8 more authors.
Journal of Materials Chemistry A | Year: 2016

The concept of all-polymeric yolk-shell nanocapsules as a tunable platform for designing hierarchically nanostructured catalysts is demonstrated. Such nanocapsules are investigated for catalytic CO oxidation. Polyaniline yolk-shell nanocapsules are synthesized in one pot, without a template and characterized by UV-Visible, IR, XRD, DLS, BET, TEM and EDS analyses. The yolk and shell parts of nanocapsules can be selectively doped: yolk-trapping of copper ions allows the in situ synthesis of yolk-confined copper NPs. Hierarchical co-loading with gold (shell) and copper (yolk) can also be performed. By investigating the catalytic activities of all possible architectures with Cu and Au, the benefits of controlling the catalyst nanostructure and its hierarchical loading are demonstrated. Both confinement and cooperative effects are measured with a respective increase of catalysis performances of 2 and 7 times. Nickel can be loaded in the yolk part instead of copper, and platinum (shell) instead of gold, demonstrating that this catalyst design strategy is adaptable. A similar trend for catalysis performances is obtained with nickel based catalysts. Due to its polymeric nature, this yolk-shell platform is anticipated to be able to trap a large variety of catalytic centers, allowing the on-demand design of catalysts. Applications for gas catalysis, electrocatalysis, fuel cells, and water splitting are anticipated. © 2016 The Royal Society of Chemistry. Source


Wang X.-B.,International Center for Young Scientists | Wang X.-B.,Japan International Center for Materials Nanoarchitectonics | Weng Q.,Japan International Center for Materials Nanoarchitectonics | Wang X.,Japan International Center for Materials Nanoarchitectonics | And 9 more authors.
ACS Nano | Year: 2014

Electrically insulating boron nitride (BN) nanosheets possess thermal conductivity similar to and thermal and chemical stabilities superior to those of electrically conductive graphenes. Currently the production and application of BN nanosheets are rather limited due to the complexity of the BN binary compound growth, as opposed to massive graphene production. Here we have developed the original strategy 'biomass-directed on-site synthesis' toward mass production of high-crystal-quality BN nanosheets. The strikingly effective, reliable, and high-throughput (dozens of grams) synthesis is directed by diverse biomass sources through the carbothermal reduction of gaseous boron oxide species. The produced BN nanosheets are single crystalline, laterally large, and atomically thin. Additionally, they assemble themselves into the same macroscopic shapes peculiar to original biomasses. The nanosheets are further utilized for making thermoconductive and electrically insulating epoxy/BN composites with a 14-fold increase in thermal conductivity, which are envisaged to be particularly valuable for future high-performance electronic packaging materials. © 2014 American Chemical Society. Source


News Article
Site: http://www.materialstoday.com/news/

The recipient of the 2017 Acta Materialia Silver Medal is Jing-yang Wang, the distinguished professor and division head in the High-performance Ceramic Division at the Shenyang National Laboratory for Materials Science and Institute of Metal Research, Chinese Academy of Sciences. He is also the assistant director of Shenyang National Laboratory for Materials Science. Jingyang Wang received the B.A. degree in Physics in 1992 from Peking University, M.A. degree in 1995 and Ph.D. degree in 1998, both in Materials Physics from Institute of Metal Research, Chinese Academy of Sciences. He joined the faculty in Institute of Metal Research where he became the assistant professor in 1998, associate professor in 2002, and full professor in 2006. He was the visiting scientist at International Centre for Theoretical Physics (Italy) in 2001, University of Trento (Italy) in 2001, and International Center for Young Scientists (ICYS) at National Institute of Materials Science (Japan) in 2007. Professor Wang focused over 15 years of research activities in the area of materials science of advanced engineering ceramics. He has published more than 180 peer-reviewed SCI papers (H-index factor 36), including 30 in Acta Materialia and Scripta Materialia, and has 17 patents in the field of ceramics. In addition, he presented ~50 keynote/invited talks and served 25 advisory board members and symposium organizers in international conferences. He is internationally recognized for his scientific contributions and leadership in high-throughput materials design and modeling, novel methods for processing bulk, low-dimensional and porous ceramic materials, and multi-scale structure-property relationship of high performance structural ceramics. His recent notable research contributions are: His contributions have been recognized on many scientific advisory boards and committees of the American Ceramic Society (ACerS) and the American Society of Metals International (ASM Int.) and serves on the International Advisory Board of UK CAFFE consortium (University of Cambridge, Imperial College London and University of Manchester) on ceramics for nuclear applications. He also served as the volume editor ofCeramic Engineering and Science Proceedings and is the book editor ofDevelopments in Strategic Materials and Computational Design, both published by John Wiley & Sons, Inc., and is the Executive editor ofJournal of Materials Science and Technology published by Elsevier. Professor Wang’s scientific career has also been recognized with many awards and honors, including ASM-IIM Visiting Lecturer Award in 2016, Distinguished Professor of CAS Distinguished Research Fellow Program from Chinese Academy of Sciences (CAS) in 2016, National Leading Talent of Young and Middle-aged Scientist Award from the Ministry of Science and Technology of China in 2015, DisLate Shri Sardar Pratap Singh Memorial Award from the Indian Ceramic Society in 2015, JACerS Author Loyalty Recognition Award in 2014 and the Global Star Award Society in 2012 from the ACerS, Second Prize in 2012 and First Prize in 2011 for Science and Technology Progress Award from China and First Prize for Natural Science Award from Liaoning Province in 2005. The Acta Materialia Silver Medal honors and recognizes scientific contributions and leadership from academic, industry and public sector leaders in materials research in the midst of their careers.  The Silver Medal was established in 2016 and nominees are solicited each year from the Cooperating Societies and Sponsoring Societies of Acta Materialia. Inc.  Professor Wang will receive the Silver Medal at the TMS Annual Meeting in San Diego in March 2017.


Sun H.-T.,International Center for Young Scientists | Matsushita Y.,BL15XU | Sakka Y.,Japan National Institute of Materials Science | Shirahata N.,Japan National Institute of Materials Science | And 5 more authors.
Journal of the American Chemical Society | Year: 2012

For the first time, direct experimental evidence of the formation of monovalent Bi (i.e., Bi+) in zeolite Y is provided based on the analysis of high-resolution synchrotron powder X-ray diffraction data. Photoluminescence results as well as quantum chemistry calculations suggest that the substructures of Bi+ in the sodalite cages contribute to the ultrabroad near-infrared emission. These results not only enrich the well-established spectrum of optically active zeolites and deepen the understanding of bismuth related photophysical behaviors, but also may raise new possibilities for the design and synthesis of novel hybrid nanoporous photonic materials activated by other heavier p-block elements. © 2012 American Chemical Society. Source

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