"Nanotechnology and nanomaterials"

Green Preparation of SBA-15 supported W nanoparticles 
Güzel B.1, Demir Y1, Ulusal F.1
1 Chemistry Departmant, University of Cukurova, 01330 Adana, Turkey 
E-mail: bilgehan@cu.edu.tr
Metal nanoparticles supported on high surface area solid support are of great interest in various applications such as electronics, fuel cells and catalysts for their enhanced properties due to well dispersed character with higher surface to volume ratios [1]. These are specifically in focus in the heterogeneous catalysis field regarding the surface related phenomena of catalytic activity as a function of nanoparticle size, dispersion, crystal orientation and metal loading [2]. 

Figure.1. Schematic diagram of deposition and solubility system

Tungsten is mostly not used as a catalyst but it helps in some catalytic processes. In particular, it plays an important role in metathesis of olefins and processing of petroleum products. Tungsten oxide is used in the selective catalytic reduction of coal fuels, while tungsten nanoparticles are used in the production of conductive and semiconducting materials.
In this study, the green preparation of SBA-15 supported tungsten catalysts using a novel precursor, 2,2’bipyridyl complex of tungsten, using a supercritical fluid deposition method is reported. 

1.	Ulusal F., Darendeli B., Erünal E., Eğitmen A., Güzel B., Supercritical Carbondioxide Deposition of γ-Alumina Supported Pd Nanocatalysts with New Precursors and Using on Suzuki-Miyaura Coupling Reactions// J. Supercrit. Fluids - 2017, -127, P.111-120.
2.	Ulusal F., Güzel B., Deposition of palladium by the hydrogen assisted on SBA-15 with a new precursor using supercritical carbon dioxide// J. Supercrit. Fluids - 2018, -133, P.233-238.