Highly selective epoxidation of styrene over gold–silica catalysts via one-pot synthesis: synthesis, characterization, and catalytic application
Highly selective epoxidation of styrene over gold–silica catalysts via one-pot synthesis: synthesis, characterization, and catalytic application
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DOI：
10.1039/c2nj41020f
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发表时间：
2013-02
影响因子：
3.3
通讯作者：
Junhua Liu;F. Wang;Shan-Bin Qi;Zhenggui Gu;Gongde Wu
中科院分区：
文献类型：
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作者：
Junhua Liu;F. Wang;Shan-Bin Qi;Zhenggui Gu;Gongde Wu
采用原位合成法制备了一系列金硅纳米球催化剂；得到了高度分散的金纳米粒子（GNPs, 6.4 nm），催化实验显示了良好的催化活性和环氧化选择性。为了研究GNPs的来源，利用x射线衍射（XRD）、傅里叶变换红外光谱（FT-IR）、x射线光电子能谱（XPS）等仪器对固体进行了表征。考察了溶剂、氧化剂浓度、催化剂浓度和反应时间等反应参数，优化了反应条件。
A series of Au–silica (nanosphere) catalysts were prepared by in situ synthesis; highly dispersed gold nanoparticles (GNPs, 6.4 nm) were obtained, and catalytic tests showed good catalytic activity and epoxidation selectivity. To investigate the origin of the GNPs, the solids were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and other instruments. Some reaction parameters, such as solvent, oxidant concentration, catalyst concentration and reaction time, have been investigated and reaction conditions are optimized.