Sonochemical fabrication of inorganic nanoparticles for applications in catalysis

A power-triggered preparation strategy of nano-structured inorganics: sonosynthesis

“…Because the metal atoms were so rapidly cooled that crystallization was prevented within a short-lifetime cavitation event, the obtained product appeared to be an agglomeration of 20 nm amorphous nanoparticles. Other metal precursors with single or multiple ligands like Cr(CO) 6 , Ni(CO) 4 and Co(CO) 3 NO, also have produced amorphous porous metal nanoparticles, even obtaining alloy nanoparticles by varying the composition in the solution. [55] Under the high-temperature condition provided by the hotspots, the metal atoms decomposed from volatile organometallic compounds are highly active and can react with dissolved gas in solvent to form new nanomaterials, for example, Mo(CO) 6 in hexadecane and W(CO) 6 in diphenylmethane by sonochemically heating under an CH 4 /H 2 gas separately leaded to the formation of nanostructured Mo 2 C or W 2 C/C porous aggregates, and the products showed the superior activity, selectivity and stability for the dehydrogenation and/or hydrodehalogenation of organic pollutants.…”

“…Ultrasound, which is industrially generated from the electrical energy by using a magnetostrictive or piezoelectric transducer, [1][2][3][4] often serves as a driving force to facilitate many physical, mechanical or chemical processes. Generally, high-frequency ultrasound is typically used in medical applications for diagnosis and therapy, e.g., to aid the drug delivery, or to breakdown the blood clots, or even to destroy the tumors in surgery.…”

Recent Advances in Inorganic Nanomaterials Synthesis Using Sonochemistry: A Comprehensive Review on Iron Oxide, Gold and Iron Oxide Coated Gold Nanoparticles

“…Zhanfeng et al [ 12 ] analyzed the most recent advances in the field of ultrasound-mediated effects or processes in catalysis, focusing on the production of catalyst materials and sonochemical uses in catalytic processes. Jun et al [ 13 ] clearly present the fundamental concepts of ultrasound irradiation, such as mechanical and physical effects, sonochemical effects and acoustic cavitation, and it hereby summarizes sonochemical catalysis for the manufacturing of nanostructured and microstructured inorganic materials, including plastics, inorganic composites, metal compounds and alloys.…”

Ultrasound-mediated radical cascade reactions: Fast synthesis of functionalized indolines from 2-(((N-aryl)amino)methyl)acrylates

“…The chemical effects of the irradiation of liquids with ultrasonic waves has been known for nearly a century [1] . However, in recent years the applications of ultrasonic waves have increased in the synthesis of organic [2] , [3] and inorganic [4] materials, especially for a green synthetic approach. Among the advantages of the ultrasound in synthesis is the possibility of achieving reaction selectivity that is not possible with conventional heating, enhancing selectivity [5] , [6] and improving reaction rates and yields [7] , [8] , [9] .…”