The influence of Mo particle size on the catalytic activity and product selectivity of alkalized MoS2 nanocatalysts has been investigated. Nanocatalysts are prepared using a microemulsion technique with water-to-surfactant ratios of 1-12. Three different techniques, including XRD, TEM, and hydrogen chemisorption were used to determine the molybdenum average particle size and their activity and ...

in this study, alkaline colloidal silica was prepared by titration of an alkaline solution such as sodium silicate with silicic acid in constant range of ph  .this constant range of ph was achieved by using concentrated soduim silicate solutions as ph adjusting solutions during titration.the sodium silicate solutions  having a variety of concentrations were passed  through ion-exchange resin to...

We explore the possibility of controlling the pattern formation in a purely diffusive binary mixture described by a van der Waals equation of state in non-isothermal situations. Simulations are conducted with a previously formulated thermodynamically consistent smoothed particle hydrodynamics model for a phase separating mixture. We focus on the effect of the overall concentration of species in...

Observations of new particle formation in enhanced UV irradiance zones near cumulus clouds B. Wehner, F. Werner, F. Ditas, R. A. Shaw, M. Kulmala, and H. Siebert Leibniz Institute for Tropospheric Research (TROPOS), 04318 Leipzig, Germany Leipzig Institute for Meteorology, 04103 Leipzig, Germany Department of Physics, Michigan Technological University, Houghton, Michigan, USA Department of Phys...

The contribution of boundary layer nucleation events to total particle concentrations on regional and global scales D. V. Spracklen, K. S. Carslaw, M. Kulmala, V.-M. Kerminen, G. W. Mann, and S.-L. Sihto School of Earth and Environment, University of Leeds, UK University of Helsinki, Department of Physical Sciences, P.P. Box 64, 00014 University of Helsinki, Finland Finnish Meteorological Insti...

New-particle formation events in a continental boundary layer: First results from the SATURN experiment F. Stratmann, H. Siebert, G. Spindler, B. Wehner, D. Althausen, J. Heintzenberg, O. Hellmuth, R. Rinke, U. Schmieder, C. Seidel, T. Tuch, U. Uhrner, A. Wiedensohler, U. Wandinger, M. Wendisch, D. Schell, and A. Stohl Institute for Tropospheric Research, Leipzig, Germany enviscope GmbH, Frankf...