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SUMMARY:Controlled synthesis and in situ characterization of nanoparticles
  and nanostructures
DTSTART:20170920T110000
DTEND:20170920T120000
DTSTAMP:20260509T043022Z
UID:05583f40f9f457b2a3bccbd9ce8dababbe17be80acebe5acbcdaa303
CATEGORIES:Conferences - Seminars
DESCRIPTION:Mo Li\n\nDepartment of Mechanical and Process Engineering\, ET
 H Zurich\nThe preparation and application of nanomaterials in the field of
  catalysis\, energy storage\, and gas sensing has been a topic of great in
 terest. However\, the preparation of nanomaterials with tailored structure
  and the understanding of their working mechanism remains a challenge. In 
 this presentation\, three projects aimed at controlled synthesis and in si
 tu characterization of nanomaterials will be discussed. In the first proje
 ct\, non-spherical magnetic core-shell nanostructures with gold nanopartic
 les embedded between silica and carbon layers were prepared and characteri
 zed. It was demonstrated that the paramagnetic property of the final produ
 ct is “in situ” obtained during the final calcination process\, and th
 us the aggregation of magnetic particles in liquid phase was avoided. In t
 he second project\, a two-step electrodeposition process to fabricate a 3D
  CoS/graphene hybrid network with a nanosheet structure on Ni foam was dev
 eloped. The nanosheet-like CoS is tightly wrapped and anchored by the grap
 hene layer and the two different material species are nicely integrated to
 gether\, leading to increased conductivity and enlarged electroactive surf
 ace area of the electrode materials\, which revealed its promising potenti
 al in high performance supercapacitors. In the last project\, the interact
 ion between analyte gases and NH3-selective MoO3-based sensing materials w
 as studied by in situ infrared spectroscopy. It was demonstrated that the 
 surface acidity and oxidizing property play an important role in the selec
 tive sensing process. These findings are a basis for tailoring the selecti
 vity of sensors by their surface properties\nReferences:\n[1] Li M\, Li X\
 , Qi X\, Luo F\, He G. Shape-Controlled Synthesis of Magnetic Iron Oxide@S
 iO2–Au@C Particles with Core–Shell Nanostructures. Langmuir. 2015\;31(
 18):5190-5197.\n[2] Shi J\, Li X\, He G\, Zhang L\, Li M. Electrodepositio
 n of high-capacitance 3D CoS/graphene nanosheets on nickel foam for high-p
 erformance aqueous asymmetric supercapacitors. Journal of Materials Chemis
 try A. 2015\;3(41):20619-20626.
LOCATION:I17 4 K2 https://plan.epfl.ch/?room==I17%204%20K2
STATUS:CONFIRMED
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