Efficient and recyclable Pickering magnetic interface biocatalyst: application in biodiesel production
作者：Xiaobo Liu, Yuhua Mao, Siyang Yu, Hao Zhang,* Kecheng Hu, Lingyu Zhu, Jianbing Ji and Jianli Wang*
關鍵字：Pickering; biocatalyst; biodiesel production
論文來源：期刊
具體來源：Green Chemistry
發表時間：2021年
尋找一種綠色高效的催化劑對于生物柴油的生產來說是非常重要的。本研究制備了一種Pickering磁性界面生物催化劑(Fe3O4@PS-NH-lipase)，該催化劑能有效穩定大豆油與甲醇乳液從而實現了靜態酯交換。通過調控甲醇/大豆油摩爾比、催化劑負載量，Pickering界面生物催化劑在酯交換反應中表現出了優異的的酶活性，30h內的轉化率達到了89.3%。與Pickering協同催化(PAC，依靠納米粒子與均相催化劑一起穩定Pickering乳劑)相比，Pickering界面催化（PIC，催化活性中心固定在載體上再穩定Pickering乳液)的催化活性提高了1.2倍，展現出了更顯著的催化強化效果且回收的催化劑在循環5次后仍具有很好的催化活性。本文為生物活性物質有效回收和雙相反應強化提供了一種綠色高效的策略。
Green and efficient catalysts for the production of biodiesel are highly important. In this study, a Pickering magnetic interface biocatalyst (Fe3O4@PS-NH-lipase) was prepared, which can effectively stabilize the soybean oil-in-methanol emulsion and achieve static transesterification. Choosing the appropriate methanol/soybean oil molar ratio and catalyst loading, Pickering interface biocatalyst exhibited outstanding enzymatic activity, reaching to a conversion rate of 89.3% after 30 h. Pickering interfacial catalysis (PIC, immobilizing catalytic centers on a carrier and combining with Pickering emulsion) shows more significant specific activity, leading to a 1.2-fold improvement in catalytic performance as compared to the Pickering assistant catalysis (PAC, relying on the use of nanoparticles for stabilizing Pickering emulsions together with a homogeneous catalyst). Moreover, the recycled catalyst still possesses significant catalytic activity after 5 cycles. This article provides a green and efficient strategy for the effective recovery of biologically active substances and the enhancement of biphasic reactions.
Scheme 1 Schematic illustration of the recyclable Pickering magnetic interface biocatalyst for transesterification.
DOI: 10.1039/D0GC03527K