Novel sea urchin-like polyaniline microspheres-supported molybdenum catalyst: Preparation, characteristic and functionality
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- 作者：Hangjun Ding ; Ge Wang ; Mu Yang ; Yi Luan ; Yingnan Wang ; Xingxiong Yao
- 关键词：Polyaniline microspheres ; Support ; Heterogeneous catalyst ; Molybdenum ; Epoxidation
- 刊名：Journal of Molecular Catalysis A: Chemical
- 出版年：2009
- 出版时间：4 August 2009
- 年：2009
- 卷：308
- 期：1-2
- 页码：25-31
- 全文大小：682 K
文摘
Novel heterogeneous molybdenum catalysts were successfully synthesized using sea urchin-like polyaniline (PANI) hollow microspheres constructed with their own oriented nanofibers arrays as support. This catalyst was successfully applied for efficient epoxidation of olefins using tert-butylhydroperoxide (TBHP) as oxidant. The catalytic activity of the PANI microspheres-supported catalysts (95 % conversion) was found to be higher than that observed for its corresponding homogenous catalyst (85 % conversion) and the conventional PANI-supported catalyst (65 % conversion). The immobilized catalyst showed a stable catalytic activity in manifold reuses. It was found that the special micro/nanoscale spherical morphology plays an important role for the enhancement of activities of the polymer-supported heterogeneous catalyst.