Light-Responsive, Reversible Emulsification and Demulsification of Oil-in-Water Pickering Emulsions for Catalysis

被引：201

作者：

Li, Zhiyong ^{[1
]}

Shi, Yunlei ^{[1
]}

Zhu, Anlian ^{[1
]}

Zhao, Yuling ^{[1
]}

Wang, Huiyong ^{[1
]}

Binks, Bernard P. ^{[2
]}

Wang, Jianji ^{[1
]}

机构：

[1] Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine, Key Lab Green Chem Media & React, Minist Educ,Sch Chem & Chem Engn, Xinxiang 453007, Henan, Peoples R China

[2] Univ Hull, Dept Chem, Kingston Upon Hull HU6 7RX, N Humberside, England

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2021年 / 60卷 / 08期

基金：

欧盟地平线“2020”; 中国国家自然科学基金;

关键词：

ionic liquids; microreactors; phase separation; light responsiveness; Pickering emulsion; NANOPARTICLES; INVERSION; PARTICLES; INTERFACE; STIMULI; SITU; SEPARATION; EFFICIENT; DROPLETS; CO2/N-2;

D O I：

10.1002/anie.202010750

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Pickering emulsions are an excellent platform for interfacial catalysis. However, developing simple and efficient strategies to achieve product separation and catalyst and emulsifier recovery is still a challenge. Herein, we report the reversible transition between emulsification and demulsification of a light-responsive Pickering emulsion, triggered by alternating between UV and visible light irradiation. The Pickering emulsion is fabricated from Pd-supported silica nanoparticles, azobenzene ionic liquid surfactant, n-octane, and water. This phase behavior is attributed to the adsorption of azobenzene ionic liquid surfactant on the surface of the nanoparticles and the light-responsive activity of ionic liquid surfactant. The Pickering emulsion can be used as a microreactor that enables catalytic reaction, product separation as well as emulsifier and catalyst recycling. Catalytic hydrogenation of unsaturated hydrocarbons at room temperature and atmospheric pressure has been performed in this system to demonstrate product separation and emulsifier and catalyst re-use.

引用

页码：3928 / 3933

页数：6

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