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Responsive Janus Cage Reactor
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DOI：10.1002/asia.201900173.png)
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A Janus silica cage was synthesized by selectively grafting an ionic liquid (IL) and poly-N-isopropylacrylamide (PNIPAM) (lower critical solution temperature (LCST)approximate to 32 degrees C) onto the exterior and interior sides of the mesoporous SiO2 shell. The paramagnetic core inside the cavity is responsible for magnetic collection. The PW12O403- 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 H2O2. The sulfide in the model oil can be completely decomposed at 25 degrees 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 degrees C after releasing the products.
Keyword:
desulfurization
Janus cage
oxidation
reactor
thermal-responsive
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