Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications

Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications Novel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications vNovel methods (sonochemistry, microwave dielectric heating, sonoelectrochemistry and RAPET for the fabrication of nanomaterials and their applications

Novel Methods (Sonochemistry, Microwave dielectric heating, Sonoelectrochemistry, and RAPET) for the Fabrication of

Nanomaterials and Their Applications

Aharon Gedanken, Kanbar Laboratory for Nanomaterials at the Bar-Ilan University

Center for Advanced Materials and Nanotechnology, Bar-Ilan University, Ramat-Gan, 52900, Israel

In my lecture I’ll present the four methods employed in my laboratory for the fabrication

of nanoparticles The advantages or superiority of the method over the other techniques used for the synthesis of nanoparticles as well as their application will be presented Sonochmistry is a technique in which ultrasonic waves are passed through a solution and the nanomaterials either precipitate or form a colloidal solution at the end of the sonication After preparing about 100 nanostructures by this technique I consider its four main advantages over other techniques as: 1) Preparation of amorphous products Under certain condition amorphous products are formed There is no need to add glass formers and as a bonus the amorphous products are obtained in nanometer size.2) Deposition of nanoparticles on ceramic and polymeric surfaces A smooth homogeneous coating layer

is formed on the surface The nanoparticles are anchored to the surface by forming chemical bonds or chemical interactions with the substrate and cannot be removed by washing We can coat this way surfaces of polymers, ceramics, metals, glasses, textiles, and carbon bodies 3) Insertion of nanomaterials into mesoporous materials and 4) The formation of proteinaceous micro and nanospheres

Microwave (MW) MW dielectric radiation is used mostly for the preparation of nanometals, nanometal oxides, and nanoparticles of metal chalcogenides (S-2, Se-2, and

Te-2) We will show how by using aquatic plants and MW we can clean water wastes from Heavy metal ions on the one hand, and on the other convert the wastes (silver ions for example) into marketable metallic nanoparticles

We have applied recently for a Patent claiming that nanoparticles of MgF2 prevent the formation of biofilms The Magnesium fluoride nanoparticles are prepared using MW radiation and ionic liquids

The main parameters that determine the particle size in sonoelectrochemistry are temperature, sonication intensity, and the electric pulse width Its main synthetic advantage is the ability to reduce metals for which there is no reducing agent that can do

it For example, preparing metallic Mg nanoparticles.The last technique was named by us

RAPET It stands for Reaction under Autogenic Pressure at Elevated Temperatures

RAPET is being used in our laboratory for the last four years We will show that the RAPET of silanes is yielding the smallest reported SiC particles having the highest surface area The RAPET of empty Coca Cola bottles yields micron size carbon spheres with a tensile strength of 8.30±0.69 GPa