Synergistic enhanced catalysis of micro-reactor with nano MnO2/ZIF-8 immobilized in membrane pores by flowing synthesis

Catalytic Membrane Nanoreactor with Cu–Agx Bimetallic Nanoparticles Immobilized in Membrane Pores for Enhanced Catalytic Performance

“…During the catalytic process by CMNR with Cu−Ag x immobilized in membrane pores, the contact between the catalyst and active H can be enhanced since the reaction interface provided by the catalyst surface can be effectively exposed, owing to the good dispersibility of the membrane pores, as described in our previous studies. 8,9,38,40 After the process of the mixture (p-NP + DMPO + NaBH 4 ) flowing through the CMNR, the nine-line SPR spectrum still exists with a slightly higher signal intensity, indicating that the presence of bimetallic catalysts is beneficial to generate H• radical species from NaBH 4 . At the same time, the conversion rate of p-NP is lower than that in the case without DMPO, suggesting that there exists a competitive reaction between p-NP and DMPO, namely, hydrogen radicals used for p-NP hydrogenation are trapped by DMPO.…”

“…Inspired by the flowing chemistry, the catalysts immobilized in membrane pores can also be prepared by means of flowing synthesis due to a series of following benefits. − First, the precursor solution permeates through the membrane pores under the action of an external force resulting in nanocatalysts with a small size being able to be synthesized in situ in the membrane pores and evenly distributed along the direction of membrane thickness. Second, a higher loading and superb stability can be achieved owing to the rational usage of both the large specific area and the tortured structure of membrane pores. − Finally, the dispersion of the catalysts is ensured owing to the dispersibility of membrane pores escaping the aggregation of nanoparticles beyond the membrane pore scale …”

“…In our previous study, the flowing synthesis method has been developed to in situ immobilize the core–shell nanostructural catalysts in membrane pores. ,, For the Cu–Ag bimetallic core–shell catalysts immobilization, the solid precursor prepared by Cu 2+ and 2-methylimidazole (2-MI) was first deposited in the membrane pores. After that, Cu nanoparticles were prepared after flowing the reducing solution through the membrane.…”

Enhanced Benzyl Alcohol Oxidation Coupled with Hydrogen Evolution by Co3O4@SS Electrocatalytic Membrane Structured Reactor via Flow-Through Operation

“…Currently, coating catalyst powders on the current collector is the typical structure of the electrode, which will increase the contact resistance, decrease the conductivity, and cover the active sites of the catalyst. In order to overcome these problems above, self-supporting electrodes with catalysts in situ immobilized on the porous substrate are developed. − Enhanced electronic conductivity, better mechanical stability, and increased exposure of active sites can be expected for self-supporting electrodes. A porous conductive membrane with tortuous pore structure and uniform pore size distribution would be a good substrate for catalyst immobilization since the higher specific area of the porous membrane could provide rich sites for catalyst immobilization. − In addition, the uniform distribution of the membrane pores could prevent the catalyst aggregation beyond the membrane pores and enhanced contact between the reactant and catalyst can be expected …”

In Situ Growing CuO/ZIF-8 into Nickel Foam to Fabricate a Binder-Free Self-Supported Glucose Biosensor

“…Besides, more immobilizing mass of MON/MOF can be achieved because of the higher specific surface area of the porous conductive foam, with more active sites provided . Furthermore, the MON/MOF can be stably immobilized because of the tortuous pore structure and uniformly dispersed pores of the porous conductive foam, which are beneficial to avoiding aggregation of the MON/MOF. − Therefore, more catalytic active sites can be exposed and electronic transport resistance decreased for the binder-free self-supported electrode, which means the contact between catalysts and analytes will be enhanced and the sensitivity of analytes detection can be effectivity improved. , As a proof of concept, the nickel foam is used as the substrate and the CuO/ZIF-8 with synergistic effect as biomolecular recognition element is used to prepare the binder-free self-supported CuO/ZIF-8@NiF biosensor by the in situ growth method. The detection of glucose is used to test the sensing performance of the CuO/ZIF-8@NiF biosensor.…”