Effect of Co, Ti substitutions in Mg, Al-layered double hydroxides on the physico-chemical properties and catalytic activity in oxidative transformations

被引：7
作者：
Choudhary, Anu [1 ]
Sharma, Sukanya [1 ]
Kaur, Manpreet [1 ]
Sharma, Shally [1 ]
Paul, Satya [1 ]
机构：
[1] Univ Jammu, Dept Chem, Jammu 180006, India
来源：
APPLIED CLAY SCIENCE | 2021年 / 214卷
关键词：
Layered double hydroxides; Aromatization; Deprotection; Recyclability; HANTZSCH 1,4-DIHYDROPYRIDINES; REUSABLE CATALYST; HYDROTALCITE; NANOPARTICLES; WATER; AROMATIZATION; HYDROGENATION; SELECTIVITY; REDUCTION; ALCOHOLS;
D O I：
10.1016/j.clay.2021.106288
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Considering the outstanding characteristics of layered double hydroxides (LDH), four Co and Ti-based magnetic LDH (Fe3O4-Co,Ti,Mg,Al-LDH, Fe3O4-Co,Ti,Mg-LDH, Fe3O4-Co,Ti,Al-LDH, and Fe3O4-Co,Ti-LDH) were synthesized. The effect of substituting Mg and Al atoms with Co and Ti (partially and completely) was studied on the physico-chemical properties and catalytic activity for the oxidative aromatization of 1,4-dihyropyridines (DHP) and oxidative deprotection of oximes, wherein Fe3O4-Co,Ti-LDH exhibited the best results. The synthesized catalysts were analyzed by employing different characterization techniques like Brunauer-Emmett-Teller analysis (BET), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Based on the results, the enhanced catalytic performance of Fe3O4-Co,Ti-LDH was combinedly attributed to the successful fabrication, high thermal stability and specific surface area, and more surface-active Co species. The catalyst was easily recoverable and displayed good recyclability.
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页数：9
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