Room temperature selective oxidation of cyclohexane over Cu-nanoclusters supported on nanocrystalline Cr2O3

Catalytic Applications of Carbon Dots

“…However, cyclohexane oxidation with H 2 O 2 at low temperature using the current catalysts (such as weak acid resin, iron bispidine complexes, Ru complex, Cr/Ti/Si oxides, Na-GeX, mesoporous TS-1, Ti-MCM-41, metal aluminophosphates, biomimetic systems and Cu-Cr 2 O 3 ) invariably suffers from large amount of organic solvent (i.e. acetone and acetonitrile), poor selectivity, and low H 2 O 2 efficiency, thus making its industrialization difficult [117][118][119][120][121][122][123][124][125][126]. CDs can function not only as an efficient photocatalyst (for highly selective oxidation), but also as a multi-functional component in photocatalyst design to promote wider spectrum absorption and separation of electron-hole, as well as to stabilize photolysis semiconductors [40].…”

Fabrication of CuCr2O4 spinel nanoparticles: A potential catalyst for the selective oxidation of cycloalkanes via activation of Csp3–H bond

“…Therefore, a mammoth task in this field is to design the heterogeneous catalyst that affords the primary product with high selectivity at cost of high conversion of the hydrocarbon. Our previous report indicated that, Cu (II) nanoclusters supported on nanocrystalline Cr 2 O 3 catalyst efficiently convert cyclohexane and furnish high yield of cyclohexanone [10]. But, the catalyst suffers severe leaching; therefore a catalyst that is devoid of leaching properties is highly demanding in case of liquid phase reactions, since the efficacy of a heterogeneous catalyst is evaluated in terms of its recyclability and stability.…”

Cetyl alcohol mediated synthesis of CuCr2O4 spinel nanoparticles: a green catalyst for selective oxidation of aromatic C–H bonds with hydrogen peroxide

“…20 Although the mechanism for the formation of CuCr 2 O 4 spinel nanoparticles promoted by cetyl alcohol is not very clear, we believe that this material served as modifier, that played an important role in the orchestrating the particle size. The catalyst was characterized by XRD, XPS, ICP-AES, SEM, TEM, TGA.…”

“…In our previous report, we showed synthesis of cationic surfactant CTAB mediated synthesis of Cu (II) nanoclusters supported on nanocrystalline Cr 2 O 3 catalyst, which effectively catalyzed the oxidation of cyclohexane at room temperature by activating C-H bond (sp 3 C atom) effectively. 20 We employed this catalyst in benzene hydroxylation reaction in liquid phase taking H 2 O 2 as oxidant. Although the catalyst showed efficiency towards phenol selectivity (Table 1, entry 7), but it suffered severe leaching, waning the catalytic system.…”