Sonochemical Preparation of Hollow Nanospheres and Hollow Nanocrystals
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- 4 February 2005
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 127 (8) , 2368-2369
- https://doi.org/10.1021/ja049494g
Abstract
Ceramic hollow spheres of MoS2 and MoO3 were obtained by sonochemical synthesis of MoS2 and MoO3 templated on silica nanoparticles (diameters 50−500 nm) followed by acid etching to remove the silica core. The resulting hollow materials have been characterized by elemental analysis, XPS, SEM, TEM, optical absorption, and hydrodesulfurization (HDS) studies. The TEM studies on the hollow ceramic materials indicate the formation of dispersed free spheres with a hollow core. The hollow materials obtained from thermally treated MoS2/SiO2 (450−700 °C) show the formation of layered MoS2 (lattice fringes ∼6.2 Å) with a wall thickness of 6−8 layers. The MoS2 hollow spheres are extremely active catalysts for the HDS of thiophene. Hollow spheres of MoO3 are prepared in a similar fashion. Surprisingly, upon heating, hollow crystals of MoO3 with sharp-edged truncated cubes containing inner voids are formed from the initial spheres.Keywords
This publication has 24 references indexed in Scilit:
- Hydrothermal Synthesis of α-MoO3Nanorods via Acidification of Ammonium Heptamolybdate TetrahydrateChemistry of Materials, 2002
- Synthesis and Characterization of Monodisperse Core−Shell Colloidal Spheres of Zinc Sulfide and SilicaLangmuir, 2001
- APPLICATIONS OF ULTRASOUND TO MATERIALS CHEMISTRYAnnual Review of Materials Science, 1999
- Carbon Structures with Three-Dimensional Periodicity at Optical WavelengthsScience, 1998
- Optical-absorption spectra of inorganic fullerenelike(W)Physical Review B, 1998
- Preparation and Characterization of a Novel Class of Catalysts: Ultradispersed Molybdenum Oxynitrides Supported on NaEMT and HEMT ZeoliteThe Journal of Physical Chemistry B, 1997
- Nanostructured Molybdenum Carbide: Sonochemical Synthesis and Catalytic PropertiesJournal of the American Chemical Society, 1996
- Sonochemical Synthesis of Iron ColloidsJournal of the American Chemical Society, 1996
- Assembly and local structure of MoS2 colloidal platelets on quartz and muscovite Mica surfacesJournal of Materials Chemistry, 1995
- Sonochemical synthesis of amorphous ironNature, 1991