Fabrication of Ag nanoparticles supported on one-dimensional (1D) Mn3O4 spinel nanorods for selective oxidation of cyclohexane at room temperature

被引：15

作者：

Acharyya, Shankha Shubhra ^{[1
]}

Ghosh, Shilpi ^{[1
]}

Sharma, Sachin Kumar ^{[1
]}

Bal, Rajaram ^{[1
]}

机构：

[1] CSIR, Indian Inst Petr, Catalyt Convers & Proc Div, Dehra Dun 248005, Uttar Pradesh, India

来源：

NEW JOURNAL OF CHEMISTRY | 2016年 / 40卷 / 04期

关键词：

HYDROGEN-PEROXIDE; CATALYTIC-OXIDATION; MOLECULAR-OXYGEN; GOLD NANORODS; MANGANESE OXIDES; CARBON MATERIALS; GROWTH; MNO2; NANOSTRUCTURES; EPOXIDATION;

D O I：

10.1039/c5nj02571k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ag nanoparticles (with 2-5 nm size) supported on Mn3O4 nanorods were prepared in the presence of the cationic surfactant cetrimonium bromide using a hydrothermal method. The material was characterized in detailed by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, transmission electron microscopy, scanning transmission electron microscopy-mapping, Raman spectroscopy, Fourier-transformed infrared spectroscopy and inductively coupled plasma-atomic emission spectroscopy. Electron microscopy studies revealed the formation of 1D nanorods morphology. XRD revealed the formation of Mn3O4 spinel phase and TEM showed that ultrasmall-sized metallic Ag-nanoparticles deposited on Mn3O4 spinel (nanorods). This Ag/Mn3O4 nanomaterial exhibited excellent catalytic activity in the cyclohexane oxidation reaction at room temperature. The impacts of various reaction parameters (e.g. time, substrate : H2O2 molar ratio etc.) were investigated in detail. A detailed characterization study demonstrated the correlation between the physicochemical properties of the Ag-Mn oxide nanorods and their catalytic performance. A cyclohexane conversion of 88% with 75% cyclohexanone selectivity with an overall C-6 selectivity (cyclohexanol + cyclohexanone) of 100% was accomplished at room temperature. The Ag/Mn3O4 catalyst hardly exhibited leaching up to eight reuses, proving its true heterogeneous nature.

引用

页码：3812 / 3820

页数：9

共 59 条

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