Ultrasonic Dispersionf Of Nanomaterials
ultrasonic equipment was used as shown in principle in Fig. 1. A piezoelectric ultrasonic transducer transforms a sinusoidal electrical voltage into mechanical longitudinal resonance vibration, where the resonance frequency of the equipment is 20 kHz.
Product Details
Ultrasonic Dispersionf of nanomaterials
The interaction of pressure waves (ultrasound) with a liquid medium leads to the formation of cavities in liquid. These cavities undergo continuous compression and rarefactions when they interact with positive and negative pressure cycles. This goes on until the cavities reach a critical radius, which is determined by the frequency of ultrasound. The implosion of bubbles created a local temperature of 5000K and pressures as high as 1000atm.
Description:
Ultrasound is a very effective processing method in the generation and application of nano-size materials. In general, ultrasonic cavitation in liquids may cause fast and complete degassing: initiate various chemical reactions by generating free chemical ions (radicals); accelerate chemical reactions by facilitating the mixing of reactants; enhance polymerization and depolymerization
reactions by temporarily dispersing aggregates or by permanently breaking chemical bonds in polymeric chains; increase emulsification rates; improve diffusion rates; produce highly concentrated emulsions or uniform dispersions of micron-size or nano-size materials; assist the extraction of substances such as enzymes from animal, plant, yeast, or bacterial cells; remove viruses from infected tissue; and finally, erode and break down susceptible particles, including micro-organisms . Ultrasound can be tested in lab and bench-top scale before the results are scaled up to the commercial level.
Parameter:
Model/Data | Sono-20-1000 | Sono-20-2000 | Sono-20-3000 | Sono-15-3000 |
Frequency | 20±0.5 KHz | 20±0.5 KHz | 20±0.5 KHz | 15±0.5 KHz |
Power | 1000W | 2000W | 3000W | 3000W |
Voltage | 110/220V | |||
Temperature | 300℃ | |||
Pressure | 35 MPa | |||
Intensity of sound | 20 W/cm² | 40 W/cm² | 60 W/cm² | 60 W/cm² |
Max Capacity | 10 L/Min | 15 L/Min | 20 L/Min | 20 L/Min |
Horn Material | Titanium | |||
Application:
Applications of Sonochemistry•Sonochemistry has been used for synthesis of composites for energy storage applications like:
1. Ultrasound assisted synthesis has been used for preparation of platinum-ruthenium nanoparticles, gold and platinum nanoparticles etc. for fuel cell electrodes.
2. Synthesis of Cu2O-Graphene, graphene oxide-Fe2O3for lithium ion battery electrodes.
3. Primary/Binary/Ternary nanocomposites which gave good specific capacitance, power density, energy density and cyclic stability applicable for electrode material in Supercapacitors. Nanocomposites of carbon materials (CNT, graphene, etc), conducting polymer and metal oxides due to Synergistic effect possessed enhanced electrical properties.
Advantages of Sonochemistry•Ultrasound assisted synthesis aids in preparation of uniformly distributed and uniformly sized nanocomposites in short time and utilizing less energy as compared to methods like mechanical attrition, electrodeposition etc.•High reaction rates can be achieved using sonochemistry, resulting in time efficient synthesis.•Enhanced properties were observed in the field of kinetics, selectivity, extraction, dissolution, filtration, crystallinity.•Till today the maximum specific capacitance reached by the supercapacitor electrode material of which as prepared using sonochemical method is ≈1000-1200 F/g whereas that for hydrothermal method was found to be ≈80-100 F/g and that for solvothermal is ≈200F/g.
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