Sodium laurate-assisted CeO2 nanoparticles as highly efficient and recyclable catalysts for cyanosilylation reaction

Ultrasmall CeO2 Nanoparticles with Rich Oxygen Defects as Novel Catalysts for Efficient Glycolysis of Polyethylene Terephthalate

“…When using CeCl 3 •7H 2 O as a cerium precursor, the delivery of Cl − tended to induce the growth of CeO 2 nanocrystals into secondary structures of spindle-shaped CeO 2 nanoparticles (S-CeO 2 ) constituted by ultrasmall nanocrystals (Figure 1b, Figure S2). 21 The higher concentration of H 2 O 2 can accelerate the consumption of the growth units and the CeO 2 crystallization process, thereby leading to the formation of crystals with an ultrasmall average main diffraction peaks further confirm that the as-prepared CeO 2 NPs correspond to the fluorite structure (JCPDS card no. 43-1002).…”

“…When using CeCl 3 ·7H 2 O as a cerium precursor, the delivery of Cl – tended to induce the growth of CeO 2 nanocrystals into secondary structures of spindle-shaped CeO 2 nanoparticles (S-CeO 2 ) constituted by ultrasmall nanocrystals (Figure b, Figure S2). The higher concentration of H 2 O 2 can accelerate the consumption of the growth units and the CeO 2 crystallization process, thereby leading to the formation of crystals with an ultrasmall average particle size of 2.7 nm (Figure a). CeO 2 –2.7 nm and S-CeO 2 with a length of 150–200 nm and a diameter of 30–40 nm mainly expose the (111) faces and a considerable portion of (110) faces, which is well related with the fringe spacing of 0.19 nm and XRD patterns (Figure f).…”

Magnetic hollow micro-sized nanoaggregates for synergistically accelerating PET glycolysis

“…37 Then the contents of pyridine on Lewis and Brønsted acid sites were estimated according to the literature. 38 The product composition was analyzed by high-performance liquid chromatography (HPLC) under a UV detector at 254 nm and the mobile phase of 0.5 mL min −1 methanol/water (70 : 30 v/v) at a column temperature of 30 °C with a reverse-phase C18 column (Waters 2695-2489). A hysteresis loop was obtained with a LakeShore7404 vibrating sample magnetometer (VSM).…”

“…Although the peak of Fe and the peak at 1539 cm −1 is attributed to the Brønsted acid sites. 38,50 The ratio of Brønsted to Lewis acid sites in HMNAs was calculated to be 0.08, indicating that the ZnO-Fe 3 O 4 HMNAs are Lewis acid-based catalysts. 47 Fig.…”

Half-sandwich iridium complexes with hydrazone ligands: preparation, structure, and catalytic synthesis of cyanosilylethers under air

“…4–8 On the other hand, metal complexes and Lewis acids were used as electrophilic catalysts that utilize electrophilic activities to enhance the nucleophilic addition activity of trimethylcyanosilane to carbonyl double bonds. 9–20 Although various types of catalytic systems have been developed, drawbacks such as the instability of the catalyst, harsh conditions, and narrow substrate scope have limited their applications. Recently, our group reported the ruthenium-catalyzed cyanosilylation reaction; 21 however, there are relatively few reports of hydrazone-based N , O -chelate half-sandwich iridium complexes as catalysts to catalyze the cyanosilylation reaction.…”