Fe₃O₄ Nanorods Coated with ZIF-8 and Decorated with Pt Nanoparticles as Magnetically Actuated Nanoscale Stirring Bars for Catalytic Dye Degradation, H₂ Production, and Hydrogenation of Olefins

Abstract

A well-designed magnetic rodlike MOF-based nanocomposite confining highly dispersed Pt single atoms and clusters (denoted as Fe 3 O 4 -NR@ ZIF-8/Pt) is fabricated and plays dual functional roles in high-efficient nanocatalysis and magnetically actuated stirring. Results of the catalytic experiments for dye degradation, hydrogen production of NaBH 4 , and hydrogenation of olefins show that Fe 3 O 4 -NR@ZIF-8/Pt exhibits enhanced catalytic performance in the absence of external stirring, compared with those of traditional catalytic systems, which need external stirring. Of special note, this proposed structure provides a facile and effective methodology to improve the catalytic performance of MOF-based composites without traditional external stirring and offers an outlook toward extending more application fields of MOFs and other porous materials.

Iron Nanowires Coated with Metal–Organic Frameworks for Cell-Type-Specific Multimodal Therapy

“…These values were compared to bare NWs, which were utilized as a core material in this study. The hysteresis loops of the coated and uncoated ZNWs, shown in Figure S2, differ significantly from those of the bare NWs; mainly showing saturation magnetization (77.7 and 75, respectively) lower than that of the NWs due to the antimagnetic ZIF crystal coating, which is in agreement with previous reports. , …”

“…The hysteresis loops of the coated and uncoated ZNWs, shown in Figure S2, differ significantly from those of the bare NWs; mainly showing saturation magnetization (77.7 and 75, respectively) lower than that of the NWs due to the antimagnetic ZIF crystal coating, which is in agreement with previous reports. 56,57 Cytotoxicity. Toxicity is of significant importance and should be investigated early to confirm the validity of the nanostructures for biomedical applications.…”

Self-Stirring Microcatalysts: Large-Scale, High-Throughput, and Controllable Preparation and Application

“…According to previous studies, − nanostirrers have been developed to avoid the aforementioned drawbacks caused by conventional stirring systems. For instance, Song’s group has synthesized a spindle-shaped Fe 2 O 3 core coated with a Pd/PZS shell to apply in the microdroplet dye fading reaction .…”

“…For instance, Song’s group has synthesized a spindle-shaped Fe 2 O 3 core coated with a Pd/PZS shell to apply in the microdroplet dye fading reaction . Chen’s group also has assembled an Fe 3 O 4 nanorod as a core and wrapped a layer of ZIF-8 loaded with Pt nanoparticles, which combines with a catalytic ability and magnetic drive for nanostirring . Some ferroferric oxide and polyacrylonitrile nanofibers were prepared by electrospinning and subsequently broke into short nanorotors by an ultrasonic treatment …”

“…14 Chen's group also has assembled an Fe 3 O 4 nanorod as a core and wrapped a layer of ZIF-8 loaded with Pt nanoparticles, which combines with a catalytic ability and magnetic drive for nanostirring. 15 Some ferroferric oxide and polyacrylonitrile nanofibers were prepared by electrospinning and subsequently broke into short nanorotors by an ultrasonic treatment. 16 T h i s c o n t e n t i s Compared with the traditional magnetic stirrers, the nanostirrers not only overcome the above problems such as poor mechanical stability and difficulty in being applicable to microreaction systems but also exhibit outstanding nanocatalysis performance.…”