Electrodeposition of Ag/ZIF-8-Modified Membrane for Water Remediation

Abstract

Metal–organic framework (MOF)-based membranes have been widely used in gas and liquid separation due to their porous structures and tunable compositions. Depending on the guest components, heterostructured MOFs can exhibit multiple functions. In the present work, we report a facile and rapid preparation of zeolitic imidazolate framework-8 (ZIF-8) and silver nanoparticle incorporated ZIF-8 (Ag/ZIF-8)-based membranes on stainless-steel mesh (SSM) through a “green” electrodeposition method. The SSM was first coated with a Zn-plated layer which contains mainly zinc hydroxide nitrate (Zn5(OH)8(NO3)2·2H2O) with a “leaf-like” morphology, providing anchoring points for the deposition of ZIF-8 and Ag/ZIF-8. It takes only 10 min to prepare a uniform coating of Zn5(OH)8(NO3)2·2H2O in aqueous conditions without the use of a strong base; this is by far the most efficient way of making zinc hydroxide nitrate nanocrystals. Following a similar electrodeposition approach, ZIF-8 and Ag/ZIF-8-coated SSM can be prepared within 20 min by applying a small current. The encapsulation of Ag does not alter the chemical composition nor the crystal structure of ZIF-8. The resulting ZIF-8 and Ag/ZIF-8-coated SSM have been tested for their effectiveness for rhodamine B dye removal in a fast vacuum filtration setting. Additionally, growth of E. coli was significantly inhibited after overnight incubation with Ag/ZIF-8-coated SSM. Overall, we demonstrate a fast synthesis procedure to make ZIF-8 and Ag/ZIF-8-coated SSM membranes for organic dye removal with excellent antimicrobial activity.

Virtual Special Issue Honoring the Legacy of Dr. Bettye Washington Greene

“…Devadas et al 20 describe their characterization of monodisperse spherical iron−cobalt magnetic nanoparticles, while Behdani et al 18 report on the propulsion and collective dynamics of Janus particles under electric fields. Rodriguez et al 22 describe their methodology for preparing metal−organic framework (MOF)based membranes incorporating silver nanoparticles on stainless-steel mesh (SSM) using a green electrodeposition method. Danischewski et al's 19 work furthers the field's understanding of silver nanodisc color change for the purpose of optical imaging applications.…”

“…Dr. Phillips’ reflection provides a unique perspective on the lasting influence and legacy of Dr. Greene. Following this personal reflection, we present invited research articles submitted to this VSI to honor Dr. Greene and further recognize the importance of her work in advancing the discipline. − We then include selected recent articles published in Langmuir that showcase advances within research areas related to those that Dr. Greene devoted her scientific career to advancing. − This collection of articles is divided into four sections that reflect the breadth of topics influenced by Dr. Greene’s accomplishments (Table ).…”

Constructing Physiological Defense Systems against Infectious Disease with Metal–Organic Frameworks: A Review

“…The Ag(I)-doped ZIF-8 exhibited strong antimicrobial activity, which showed only 7% bacterial growth after incubation with E. coli , while the control stainless-steel mesh showed an 80 ± 6% growth. 87 Although the initial study was for applications in water cleansing, such MOF composites may have potential applications as antibacterial medicine. Many zinc MOFs, like ZIF-8, are biocompatible and can serve as a vessel to deliver bactericidal agents, such as the Ag(I) nanoparticles.…”

Advances in the use of cell-membrane encapsulated nanoparticles to target tumor drugs

“…The concept of cell membrane-encapsulated nanoparticles is an innovative nanotechnology that employs cellular membranes as the outer casings for nanoparticles, endowing them with attributes akin to natural cells. This strategy melds the physical, chemical, and biological properties of nanomaterials with the biocompatibility and bioactivity intrinsic to cell membranes, fostering a promising avenue of exploration [15,16]. The process of crafting nanoparticles enveloped by cell membranes typically involves two steps: first, core nanoparticles, such as metallic nanoparticles and drug carriers, are fabricated using nanotechnology; subsequently, these core nanoparticles are ensheathed or coated with cell membranes.…”