Controllable synthesis of niobium doped mesoporous silica materials with various morphologies and its activity for oxidative catalysis

被引：12
|
作者：
Rahman, Sumbul [1 ]
Shah, Sneha [1 ]
Santra, Chianjit [1 ]
Sen, Debasis [2 ]
Sharma, Sadanand [3 ]
Pandey, J. K. [3 ]
Mazumder, S. [2 ]
Chowdhury, Biswajit [1 ]
机构：
[1] Indian Sch Mines ISM, Dept Appl Chem, Dhanbad, Bihar, India
[2] Bhabha Atom Res Ctr, Div Solid State Phys, Bombay 400085, Maharashtra, India
[3] Cent Inst Min & Fuel Res, Dhanbad, Bihar, India
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2016年 / 226卷
关键词：
HMS-X; Silica; SAXS; Oxidation; Ethyl-benzene; HMS-X CATALYST; MOLECULAR-SIEVES; CO-HMS; NANOPARTICLES; EPOXIDATION; TRIBLOCK; DESIGN;
D O I：
10.1016/j.micromeso.2015.12.049
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Nb doped HMS-X (Nb-HMS-X) was synthesized by sol gel/emulsion method using non-ionic tri-block copolymer surfactant PEO140PPO39PEO140 (P123) as a structure directing agent. The effect of synthesis condition on the pore morphology and nature of pore ordering was, investigated. Small-angle X-ray Scattering (SAXS) revealed highly ordered pore structure in Nb-HMS-X. It is demonstrated by Field Emission Scanning Electron Microscopy (FESEM) that the materials possessed various morphologies such as, regular spheres, disordered and tube-spheres depending on synthesis conditions. The solid state Si-29 nuclear magnetic resonance measurements showed that chemical environment of silicon atoms get modified significantly with synthesis condition. Furthermore, the synthesized niobium doped hollow mesoporous silica (Nb-HMS-X) was effective to catalyze ethyl benzene oxidation reaction where activation of C-H bond took place. 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码：169 / 178
页数：10
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