Monodispersed Hollow SO3H-Functionalized Carbon/Silica as Efficient Solid Acid Catalyst for Esterification of Oleic Acid

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• 作者：Yang Wang ; Ding Wang ; Minghui Tan ; Bo Jiang ; Jingtang Zheng ; Noritatsu Tsubaki ; Mingbo Wu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：December 9, 2015
• 年：2015
• 卷：7
• 期：48
• 页码：26767-26775
• 全文大小：581K
• ISSN：1944-8252

文摘

SO₃H-functionalized monodispersed hollow carbon/silica spheres (HS/C-SO₃H) with primary mesopores were prepared with polystyrene as a template and p-toluenesulfonic acid (TsOH) as a carbon precursor and 鈭扴O₃H source simultaneously. The physical and chemical properties of HS/C-SO₃H were characterized by N₂ adsorption, TEM, SEM, XPS, XRD, Raman spectrum, NH₃-TPD, element analysis and acid鈥揵ase titration techniques. As a solid acid catalyst, HS/C-SO₃H shows excellent performance in the esterification of oleic acid with methanol, which is a crucial reaction in biodiesel production. The well-defined hollow architecture and enhanced active sites accessibility of HS/C-SO₃H guarantee the highest catalytic performance compared with the catalysts prepared by activation of TsOH deposited on the ordered mesoporous silicas SBA-15 and MCM-41. At the optimized conditions, high conversion (96.9%) was achieved and no distinct activity drop was observed after 5 recycles. This synthesis strategy will provide a highly effective solid acid catalyst for green chemical processes.