La(OH)₃ nanoparticles immobilized on Fe₃O₄@chitosan composites as novel magnetic nanocatalysts for sonochemical oxidation of benzyl alcohol to benzaldehyde

Abstract

A sustainable synthesis of novel Fe3O4@CS/La(OH)3 as a nanocatalyst for oxidation of benzyl alcohols to benzaldehydes has been developed.

Silica nanospheres KCC-1 as a good catalyst for the preparation of 2-amino-4H-chromenes by ultrasonic irradiation

“…In Continuing our previous researches 22 , to investigate the performance of ultrasonic irradiation, we report the fabrication of Co3O4@PPIL-Mo as a catalyst and for the synthesis of mono-spiro derivatives under ultrasonic irradiation. Also, literatures have been reported for the synthesis of spiroindolines 23 , pyridopyrimidines 24 , 2, 3-dihydroquinazolin-4 (1H)-ones 25 and oxidation of benzyl alcohol under ultrasonic irradiation 26 have been reported.…”

Co3O4@chitosan/La2O3 nanocomposites as innovative, powerful, and recyclable nanocatalysts for sonochemical treatment of benzyl alcohols to obtain the corresponding benzaldehyde derivatives

“…1c). 6,7,31 In the energy-dispersive X-ray spectroscopy (EDX) spectrum shown in Fig. 2, the presence of the elements: C, Co, La, N, and O, was determined according to their energy, which indicated the conrmation of the product purity.…”

“…Therefore, La 2 O 3 is an excellent choice for research on improving its catalytic activity. 1,2,6,7,[17][18][19] In addition, the ultrasound (US) irradiation method is an ecofriendly, safe, and cheap technology which is used as a versatile tool in a vast range of scientic and technological applications. [20][21][22] In contrast to normal thermal heating, US irradiation has many important benets: improved efficiency, a signicant reduction in reaction time, increased selectivity, it is inexpensive and easy to handle and use in various procedures, and the compounds show excellent purity.…”

“…Thanks to its special and attractive properties, chemists have assigned a great amount of time to researching the uses of H 2 O 2 . 6,7 In terms of quantity used, BZD (with a smell of bitter almonds) is the second most important aromatic molecule (aer vanillin). In this eld, the catalytic processes that lead to excellent-quality BZD are particularly appealing for use in the perfume and food industries, pharmaceuticals, dyes, beverages, agribusiness industries, and chemicals.…”

“…In this eld, the catalytic processes that lead to excellent-quality BZD are particularly appealing for use in the perfume and food industries, pharmaceuticals, dyes, beverages, agribusiness industries, and chemicals. [3][4][5][6][7] The most plentiful polysaccharide, other than cellulose, is chitin, which has many properties such as biodegradability and biocompatibility. 8 Chitosan (CS) is the basic derivative of chitin.…”