Synthesis of Fe3O4@ZIF-8 magnetic core–shell microspheres and their potential application in a capillary microreactor

Facile preparation of ZIF-8@Pd-CSS sandwich-type microspheres via in situ growth of ZIF-8 shells over Pd-loaded colloidal carbon spheres with aggregation-resistant and leach-proof properties for the Pd nanoparticles

“…Furthermore, the measured -potential of Pd-loaded CCSs is −20.9 eV in water (pH = 7), indicating the negatively charged property of Pd-loaded CCSs surface. Based on our previous report, the negatively charged surface could also help adsorb Zn 2+ cations to initiate nucleation of ZIF-8 [20]. Fig.…”

Magnetic ZIF-8/cellulose/Fe3O4 nanocomposite: preparation, characterization, and enzyme immobilization

“…2c displays the chemical composition of the ZIF-8@Cellu@Fe 3 O 4 . A strong peak at 421 cm −1 is ascribed to the Zn-N stretch mode (Zhang et al 2013). The broad bands around 500-1350 and 1350-1500 cm −1 were assigned as the plane bending and stretching of imidazole ring, respectively (Lu et al 2012).…”

“…Further investigations on magnetic MOFs with core-shell structure are still needed because the controllable growth of the MOF crystals on the magnetic nanoparticles remains a great challenge (Nong et al 2015). For instance, before the MOF crystal growth process, the magnetic nanoparticles need to be surface-modificated by styrene sulfonate (Zhang et al 2013), polyacrylic acid , chitosan (Xia et al 2017), and SiO 2 (Wehner et al 2016). It is worthy to note that cellulose may be acted as a promising surface material, because of its abundance of hydroxyl groups.…”

Solvent-free semihydrogenation of acetylene alcohols in a capillary reactor coated with a Pd–Bi/TiO 2 catalyst

“…There are three ways to perform heterogeneously catalysed multiphase reactions in microreactors: (i) using small catalyst particles in a micro fixed bed configuration [21,31,32], (ii) with magneticallysupported catalysts held at the reactor walls with magnetic field [33][34][35][36], or (iii) with a catalytic coating deposited onto the inner reactor walls [6,[37][38][39][40][41]. The first approach seems advantageous because any catalyst suitable for batch hydrogenation can be used to make a packed-bed reactor.…”