Efficient and recyclable Pickering magnetic interface biocatalyst: application in biodiesel production
writer：Xiaobo Liu, Yuhua Mao, Siyang Yu, Hao Zhang,* Kecheng Hu, Lingyu Zhu, Jianbing Ji and Jianli Wang*
keywords：Pickering; biocatalyst; biodiesel production
source：期刊
specific source：Green Chemistry
Issue time：2021年
尋找一種綠色高效的催化劑對(duì)于生物柴油的生產(chǎn)來(lái)說(shuō)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(wěn)定大豆油與甲醇乳液從而實(shí)現(xiàn)了靜態(tài)酯交換。通過調(diào)控甲醇/大豆油摩爾比、催化劑負(fù)載量，Pickering界面生物催化劑在酯交換反應(yīng)中表現(xiàn)出了優(yōu)異的的酶活性，30h內(nèi)的轉(zhuǎn)化率達(dá)到了89.3%。與Pickering協(xié)同催化(PAC，依靠納米粒子與均相催化劑一起穩(wěn)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(wěn)定Pickering乳液)的催化活性提高了1.2倍，展現(xiàn)出了更顯著的催化強(qiáng)化效果且回收的催化劑在循環(huán)5次后仍具有很好的催化活性。本文為生物活性物質(zhì)有效回收和雙相反應(yīng)強(qiáng)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