Creating hierarchically porous banana paper-metal organic framework (MOF) composites with multifunctionality

Vapor phase synthesis of metal–organic frameworks on a nanofibrous aerogel creates enhanced functionality

“…57,58 ZIF-8 has been recently recognized as an antimicrobial agent due to its capability to release zinc ions, which have been shown to have potential antimicrobial activity. 43,[59][60][61] Metal ions exert their microorganism (bacteria and fungi) growth inhibition through the generation of hydroxyl and superoxide anion free radicals through oxidation. 62 Alternatively, a series of redox reactions can lead to cell death by impacting critical cell structures (cell wall, cell membrane, DNA, etc.)…”

“…35 4.4 ZnO ALD on CDA-silica nanobers and NFA substrates Thin layers of zinc oxide (ZnO) were coated on CDA-silica nanobers and NFA substrate using a home-built hot-wall viscous-ow ALD reactor. 15,43,64 Nitrogen (N 2 ) was utilized as the purge and carrier gas during the deposition process, which was conducted at a temperature of 90 °C and a pressure of 1.1-1.2 torr. The deposition recipe consisted of four steps: 1s/40s/1s/ 40s corresponding to DEZ dose/N 2 purge/H 2 O dose/N 2 purge.…”

“…Fig.4CO 2 adsorption capacity of CDA-silica@ZIF-8 NFA: (a) schematic illustration of CO 2 adsorption in ZIF-8 through physisorption mechanism, (b) CO 2 uptake of CDA-silica@ZIF8-120cy at 35, 60 and 80 °C from a mixture of 15% CO 2 and 85% Ar, (c) CO 2 uptake of CDA-silica@ZIF-8 NFA at 35 °C from a mixture of 90% CO 2 and 10% Ar, (d) CO 2 adsorption capacity of our CDA-silica@ZIF-8 NFA compared to other works,43,53 (e) a comparison between the experimental and predicted CO 2 adsorption curves using the pseudo-first-order model for CDA-silica@ZIF8-120cy, CDA-silica@ZIF8-60cy and CDA-silica NFAs at an adsorption temperature of 35 °C. (f) In situ FTIR of CO 2 adsorbed on CDA-silica@ZIF8-120cy monitored as a function of time at 35 °C and 1 bar.…”

“…[40][41][42] Recent efforts in developing solvent-free MOF synthesisincluding chemical vapor deposition (CVD), ALD, molecular layer deposition (MLD), and combined physical vapor deposition-CVD, have focused on depositing MOF thin lms on 2D substrates. 43 Studies combining vapor phase MOF synthesis with 3D substrates remain largely unexplored, with the beauty of our approach being to preserve the high micro/meso-porosity of ZIF-8 crystals while combining it with the hierarchical porosities, exibility, formability, and low density of NFAs. The distinctive combination of sol-gel electrospinning, aerogel fabrication and vapor phase MOF synthesis creates a sustainable and potentially scalable platform for superior performance of ZIF-8 powders in a multitude of applications.…”

Metal–organic frameworks on versatile substrates

“…Textile bers are exible, breathable, and affordable and have been widely recognized as one of the advantageous supports for MOF fabrication. Textile bers, including cotton fabric, [277][278][279][280][281][282][283][284][285][286][287][288] paper, [289][290][291][292][293] biomass materials such as wood, [294][295][296][297] and textile cellulose, [298][299][300][301][302][303][304][305][306][307][308][309] are widely reported. For instance, Manos et al obtained cotton fabric, which was pre-functionalized with PDA, providing catechol units for the strong bonding of MIL-53 on a cotton surface.…”