Facile Synthesis of Yolk/Core-Shell Structured TS-1@Mesosilica Composites for Enhanced Hydroxylation of Phenol
Facile Synthesis of Yolk/Core-Shell Structured TS-1@Mesosilica Composites for Enhanced Hydroxylation of Phenol
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DOI：
10.3390/catal5042134
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发表时间：
2015-12
期刊：
影响因子：
3.9
通讯作者：
Houbing Zou;Qingling Sun;Dongyu Fan;Weiwei Fu;Lijia Liu;Runwei Wang
中科院分区：
文献类型：
--
作者：
Houbing Zou;Qingling Sun;Dongyu Fan;Weiwei Fu;Lijia Liu;Runwei Wang
本论文以蛋黄/核壳结构的TS-1@mesoSiO2复合材料为研究对象，研究了其在苯酚羟基化反应中的催化性能。采用均匀包覆法制备了核壳型TS-1 @ mesosi-ica复合材料，以间苯二酚-甲醛树脂（RF）为牺牲模板制备了核壳型TS-1 @ mesosi-ica复合材料。采用X射线衍射（XRD）、N2吸附、傅立叶变换红外光谱（FT-IR）、紫外-可见光谱（UV-Vis）、扫描电镜（SEM）和透射电镜（TEM）等手段对材料进行了表征。表征结果表明，这些样品具有高度均匀的蛋黄/核壳结构，高表面积（560-700 m2 g-1）和从定向中孔到沸石微孔的分级孔结构。重要的是，由于其独特的结构特性，这些复合材料在苯酚羟基化反应中表现出增强的活性和选择性。
In the current work, we developed a facile synthesis of yolk/core-shell structured TS-1@mesosilica composites and studied their catalytic performances in the hydroxylation of phenol with H2O2 as the oxidant. The core-shell TS-1@mesosilica composites were prepared via a uniform coating process, while the yolk-shell TS-1@mesosilica composite was prepared using a resorcinol-formaldehyde resin (RF) middle-layer as the sacrificial template. The obtained materials were characterized by X-ray diffraction (XRD), N2 sorption, Fourier transform infrared spectoscopy (FT-IR) UV-Visible spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The characterization results showed that these samples possessed highly uniform yolk/core-shell structures, high surface area (560–700 m2 g−1) and hierarchical pore structures from oriented mesochannels to zeolite micropores. Importantly, owing to their unique structural properties, these composites exhibited enhanced activity, and also selectivity in the phenol hydroxylation reaction.