Comparison of Kinetic Study of CTMA+ Removal of Molecular Sieve Ti-MCM-41 Synthesized with Natural and Commercial Silica

Fontes, Maria do Socorro Braga; Melo, D.M.A.; Costa, Cíntia de Castro; Braga, Renata Martins; Alves, José Antônio Barros Leal Reis

doi:10.1590/1516-1439.019015

Cited by 5 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Beyond 490°C, the weight loss due to the removal of hydroxyl groups linked to copper [43] and condensation of SiÀ OH groups of the inner surface of pores of silica. [50] SEM analysis performed to study the surface morphology and the structure of the nanoparticles, as shown in Figure 4. The presence of Zn, Cu, Si, and O elements was confirmed by EDAX and mapping ( Figure S1 A-E).…”

Section: Full Papermentioning

confidence: 99%

Ketone Hydrogenation by Using ZnO−Cu(OH)Cl/MCM‐41 with a Splash of Water: An Environmentally Benign Approach

Choudhary

Ghosh

Mobin

2020

Chemistry An Asian Journal

View full text Add to dashboard Cite

MCM-41-supported ZnOÀ Cu(OH)Cl nanoparticles were synthesized via an incipient wetness impregnation technique using zinc chloride and copper chloride salts as well as water at room temperature. The catalyst was characterized by powder X-ray diffraction (PXRD), infrared spectroscopy (IR), and TGA, whereas surface and morphological studies were performed by using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The above studies revealed the incorporation of metal species into the pores of MCM-41, leading to a decrease in surface area of the nanoparticles that was found to be 239.079 m 2 /g. The substituents attached to the ketone determine the rate of the reaction, and the utilization of the green solvent 'water' astonishingly completes the hydrogenation reaction in 45 minutes at 40°C with 100% conversion and 100% selectivity as analyzed by gas chromatography-mass spectrometry. Hence, ZnOÀ Cu(OH)Cl/MCM-41 nanoparticles with 2.46 wt% zinc and 6.39 wt% copper were demonstrated as an active catalyst for the reduction of ketones without using any gaseous hydrogen source making it highly efficient as well as environmentally and economically benign.

show abstract

Section: Full Papermentioning

confidence: 99%