Cyclohexane oxidation over AFI molecular sieves: effects of Cr, Co incorporation and crystal size
Cyclohexane oxidation over AFI molecular sieves: effects of Cr, Co incorporation and crystal size
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AFI 分子筛上的环己烷氧化：Cr、Co 掺入和晶体尺寸的影响
DOI：
10.1039/c5cy00416k
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发表时间：
2015-05
影响因子：
5
通讯作者：
Jian Li
中科院分区：
文献类型：
--
作者：
Decheng Liu;Baoquan Zhang;Xiufeng Liu;Jian Li
在水热条件下合成了不同尺寸和形貌的杂原子取代AFI分子筛，并用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(UV-Vis)、傅立叶变换红外光谱(FT-IR)、氮气吸附/脱附等温线测定、电感耦合等离子体发射光谱(ICPOES)和热重分析(TG-DTG)对其进行了表征。采用晶种诱导法制备了尺寸均匀、厚度可达400 nm的片状晶体。在分子筛中引入了铬和钴离子，并通过焙烧将其中一些离子转化为高价态。在环己烷氧化反应中，虽然掺杂量较低，但双金属取代的AlPO4-5的催化活性高于单一金属取代的类似物。沿c轴方向通道的缩短导致扩散效率的提高，大大提高了环己烷的转化率。
Heteroatom substituted AFI molecular sieves with different sizes and morphologies were synthesized under hydrothermal conditions and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FT-IR), N2 adsorption/desorption isotherm measurement, inductively coupled plasma-optical emission spectrometry (ICP-OES) and thermogravimetric analysis (TG-DTG). Uniformly sized plate-like crystals as thin as 400 nm were prepared using a seed inducing method. Cr and Co ions were introduced into the molecular sieves and some of them were transformed to the high-valence state through calcination. In the reaction of cyclohexane oxidation, bimetal substituted AlPO4-5 exhibited higher catalytic activities than single metal substituted analogues although the doping amount is lower. The improvement of diffusion efficiency resulting from the shortening of the channels along the c-axis increased the conversion of cyclohexane significantly.
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影响因子：
5.5
作者：
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通讯作者：
Shao-Kai Lin;H. Weng
影响因子：
5.5
作者：
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通讯作者：
R. Raja;Sang-Ok Lee;M. Sánchez-Sánchez-M.-Sánchez-Sánchez-1398732651;G. Sankar;K. Harris;B. Johnson;John Meurig Thomas
影响因子：
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作者：
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