Silylated MgAl LDHs intercalated with MnO2 nanowires: Highly efficient catalysts for the solvent-free aerobic oxidation of ethylbenzene

Lv, Wenmiao; Yang, Lei; Fan, Bin; Zhao, Yuan; Chen, Yanfeng; Lu, Ningyue; Li, Ruifeng

doi:10.1016/j.cej.2014.11.009

Cited by 64 publications

(15 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, it was of significance to design highly effective catalysts, especially a low-cost heterogeneous catalyst, for the oxidation reaction of GLY. LDHs were often considered as catalysts or catalyst supports owing to their adjustable surface basicity, high surface and thermal stability, along with the adjustable variability of their laminate cations, and the exchangeability of their interlayer anions [21][22][23][24]. In our previous report, we prepared an LDH-hosted chromium complex, which was an active catalyst for the oxidation reaction of GLY to DHA with 3% H2O2 [17].…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

Base-Free Selective Oxidation of Glycerol over LDH Hosted Transition Metal Complexes Using 3% H2O2 as Oxidant

Wang

Shang

et al. 2016

Catalysts

View full text Add to dashboard Cite

A series of transition metal sulphonato-Schiff base complexes were intercalated into Mg-Al layered-double hydroxides (LDHs). The obtained catalysts were characterized by FTIR, XRD, N 2 sorption, SEM and elemental analysis, and then were used in the selective oxidation of glycerol (GLY) using 3% H 2 O 2 as an oxidant. It was found that their catalytic performances were closely related to the loading of active complexes, the Schiff base ligands and the metal centers of the catalysts, as well as the reaction conditions. The optimal conversion of GLY was 85.0%, while the selectivity of 1,3-dihydroxyacetone (DHA) was 56.5%. Moreover, the catalysts could be reused at least 10 times.

show abstract

Section: Characterization Of Catalystsmentioning

confidence: 99%

Base-Free Selective Oxidation of Glycerol over LDH Hosted Transition Metal Complexes Using 3% H2O2 as Oxidant

Wang

Shang

et al. 2016

Catalysts

View full text Add to dashboard Cite

show abstract

“…The peaks at 3448 and 1092 cm −1 , which were assigned to the vibration of SiOH and SiOSi, respectively, were observed in SiO 2 30 . In addition, the peak of 2922 cm −1 showed that SiO 2 microspheres also came from MPTS 31 . In the SiO 2 @PS spectrum, new peaks appeared at 3022 and 1598–1444 cm −1 , which were attributed to the stretching vibration of CH on the CC double bond and the skeleton vibration of the benzene ring 30,32 .…”

Section: Resultsmentioning

confidence: 91%

“…30 In addition, the peak of 2922 cm −1 showed that SiO 2 microspheres also came from MPTS. 31 In the SiO 2 @PS spectrum, new peaks appeared at 3022 and 1598-1444 cm −1 , which were attributed to the stretching vibration of CH on the C C double bond and the skeleton vibration of the benzene ring. 30,32 Combined with SEM images, snowman-like JPs with SiO 2 on one side and PS on the other side were obtained.…”

Section: Physical-mechanical Propertiesmentioning

confidence: 96%

Design of Janus particles based on silica@polystyrene and their compatibilization on poly(p‐dioxanone)/poly(lactic acid) composites

Liu

Chen

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

The compatibility of poly(p‐dioxanone) (PPDO) and poly(lactic acid) (PLA) is very important when they are blended. Herein, three kinds of snowman‐like Janus particles (JPs) with different hydrophilic–lipophilic balance (HLB) were prepared by one‐pot method by adjusting the surficial functional groups of polystyrene (PS) side and used as the compatibilizer of PPDO/PLA composites. JPs self‐assemble at the cell‐structure PPDO/PLA interface, which provides channels for the migration of PPDO. The silica (SiO2) side forms hydrogen bond with PLA, and the PS side forms hydrophobic action with PPDO. Therefore, JPs improve interfacial adhesion and suppress phase separation. Among the three JPs, silica@polystyrene‐graft‐polymethylmethacrylate (SiO2@PS‐PMMA) possesses the most excellent interfacial behavior because its HLB value is similar to that of PPDO/PLA composites. Tensile strength was increased from the original 14.59 MPa to the maximum 24.18 MPa at 1.5 phr of SiO2@PS‐PMMA JPs, and the elongation at break increased from 39% to 203%.

show abstract

“…Recently, several researchers have used various homogeneous as well as heterogeneous catalysts, for example, silica/alumina anchored Mn complexes for ethylbenzene oxidation, Mn and Cu comprising hydrotalcites, mixed oxides of Co, Cu, and Ag nanoparticles supported over silica, Co‐containing compounds, and Cr, Mn, Co, and Ce comprising mesoporous molecular sieves . In most cases, to attain both high selectivity and excellent activity, their poor recyclability greatly limits their practical applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of polymer‐silica hybrid‐supported catalysts for solvent‐free oxidation of ethylbenzene with TBHP

Chaudhary

Sharma

2020

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Polymer-silica hybrid support was synthesized, and Cu (II), Co (II), Mn (II), and Ni (II) metals were loaded over hybrid support by incipient impregnation method. Oxidation of ethylbenzene was performed for catalytic evaluation of catalysts at different reaction conditions, that is, the mole ratio of ethylbenzene to TBHP and reaction temperature. The main reaction product was acetophenone along with benzaldehyde as the minor product. The highest ethylbenzene conversion (96.5%) was attained at a 1:3 mole ratio of ethylbenzene to TBHP and temperature at 100 C. Activation energy and reusability of the catalysts were also determined, and results showed that they can be easily reused three times without much loss in their structural and catalytic properties.

show abstract

Silylated MgAl LDHs intercalated with MnO2 nanowires: Highly efficient catalysts for the solvent-free aerobic oxidation of ethylbenzene

Cited by 64 publications

References 37 publications

Base-Free Selective Oxidation of Glycerol over LDH Hosted Transition Metal Complexes Using 3% H2O2 as Oxidant

Base-Free Selective Oxidation of Glycerol over LDH Hosted Transition Metal Complexes Using 3% H2O2 as Oxidant

Design of Janus particles based on silica@polystyrene and their compatibilization on poly(p‐dioxanone)/poly(lactic acid) composites

Synthesis of polymer‐silica hybrid‐supported catalysts for solvent‐free oxidation of ethylbenzene with TBHP

Contact Info

Product

Resources

About