Photoenzymatic coupled catalysis, integrating semiconductor photocatalysis and enzymatic catalysis, exhibits great potential for light-driven synthesis. To make photocatalyst and enzyme at play concertedly, nicotinamide-based cofactors have been widely used as electron carrier. However, these cofactors are easily oxidized into enzymatically inactive form by photo-generated holes. Herein, oxidation mechanism of NADH, one typical nicotinamide-based cofactor, by photo-generated holes was reported. With CdS, g-C3N4 and BiVO4 as hole generators, NADH is oxidized into NAD + or fragmented into ADP-ribose derivatives through multi-step electron transfer. Importantly, fragmentation reaction is inhibited with dopamine and neutral red to coordinate electron transfer between NADH and photo-generated holes.
Porous carbon materials are highly attractive in the research field of adsorption, particularly, for treating organic pollutants in wastewater, of which the facile yet generic method is highly pursued. In our study, carbon aerogels bearing a hierarchically structured surface were prepared through direct carbonization of Biomass@metal−organic framework (MOF) composites. Briefly, MIL-53, one typical MOF material, was in situ assembled on the surface of kapok fibers, a kind of fibrous biomass with the highest hollow degree on earth, through surfaceinduced mineralization. After direct carbonization, the resultant
Metal−organic frameworks (MOFs) with tailored chemical compositions and topological structures have exhibited good application potential in the fields of adsorption, catalysis, and so on. In our study, an aerogel that is composed of a kapok fiber core and MOF nanocoating was fabricated through growing hydrophobic ZIF-8 on the kapok surface induced by Fe 3+ -tannic acid networks (FTN). Briefly, kapok, a typical fiber in nature, was first pretreated by NaClO 2 solution and then coated by FTN through coordination-enabled assembly/adhesion of Fe 3+ and tannic acid. Then, the growth of ZIF-8 nanocoating was triggered by FTN, where the dodecane was in situ anchored on the as-formed ZIF-8, thus forming the ZIF-8*/FTN/ kapok aerogel. The resultant aerogel exhibited a lotus leaf-like surface, where ZIF-8 and dodecane, respectively, mimicked the nubs and the wax on the lotus leaf. As a result, the aerogel showed a superhydrophobic surface that exhibited a water contact angle of 162.31°, which could absorb a series of oils/organics with the capacities of 20.0−72.0 g g (sorbent)−1 , over 17−40 times higher than ZIF-8* particles depending on the types of oils/organics. Moreover, the aerogel showed superior recyclability, which retained over 75.64% of its original sorption capacity after 50 cycles. By using of our method, the hydrophobic MOF nanocoating could be grown on a broad range of materials, which would broaden the application of MOFs.
Crackled organosilica nanocapsules (CONs) are prepared using a metal–organic framework (MOF) hard-templating method to directly immobilize enzymes without post modification.
Exploring systems with distinct stimuli-response property is vital for controlled release. In our study, a reaction-triggered system based on enzyme-encased capsules is constructed through mussel-inspired chemistry for controlled release of...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.