Responsive Janus Cage Reactor

Yan Si; Xuyang Ji; Fuxin Liang; Bingyin Jiang; Zhenzhong Yang

doi:10.1002/asia.201900173

Responsive Janus Cage Reactor

Chem Asian J. 2019 Jun 3;14(11):1917-1920. doi: 10.1002/asia.201900173. Epub 2019 Apr 16.

Authors

Yan Si^{1

2}, Xuyang Ji¹, Fuxin Liang¹, Bingyin Jiang¹, Zhenzhong Yang³

Affiliations

¹ State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
² University of Chinese Academy of Sciences, Beijing, 100049, China.
³ Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China.

PMID: 30861301
DOI: 10.1002/asia.201900173

Abstract

A Janus silica cage was synthesized by selectively grafting an ionic liquid (IL) and poly-N-isopropylacrylamide (PNIPAM) (lower critical solution temperature (LCST)≈32 °C) onto the exterior and interior sides of the mesoporous SiO₂ shell. The paramagnetic core inside the cavity is responsible for magnetic collection. The PW₁₂ O₄₀ ^3- anion is further conjugated onto the IL side by anion exchange. The Janus cage acts as a thermal-responsive reactor for catalytic oxidization of dibenzothiophene (DBT) in the presence of H₂ O₂ . The sulfide in the model oil can be completely decomposed at 25 °C, whilst the oxidative products are more dissoluble in water and preferentially captured inside the Janus cage. The Janus cage reactor could be regenerated at high temperature above 32 °C after releasing the products.

Keywords: Janus cage; desulfurization; oxidation; reactor; thermal-responsive.

Abstract

Grants and funding