Thermal oxygen sensitization modification and its visible light catalytic antibacterial performance for ZIF-8

Pei, Zhen; Fei, Pengfei; Zhang, Aiqin; Guo, Jiandong; Hao, Jiacheng; Jia, Jing; Dong, Hailiang; Shen, Qianqian; Wei, Liqiao; Jia, Husheng; Xu, Bingshe

doi:10.1016/j.jallcom.2022.164055

Cited by 24 publications

(13 citation statements)

References 25 publications

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“…ZIF-8 demonstrated its high activity in photocatalytic reactions like CO 2 reduction, E. coli inactivation as well as antibacterial capability with high structure stability. ,, The toxicity of ZIF-8 is very low and has been used for bioapplications. , Thus, ZIF-8 NPs were selected as the functional heterophases for air filtration/purification and antibacterial applications. For a smooth ZIF-8 electrospray, the ZIF-8 NPs are required to be predispersed in the solvent, which is also compatible with the HFP solvent that dissolves PLA/PHBR.…”

Section: Resultsmentioning

confidence: 99%

Electrospray-on-Electrospun Breathable, Biodegradable, and Robust Nanofibrous Membranes with Photocatalytic Bactericidal Activity

Lim

Yap

Teng

et al. 2023

ACS Appl. Nano Mater.

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The increasing emergence of infectious diseases like COVID-19 has created an urgent need for filtration/purification materials coupled with multifunctional features such as mechanical integrity, excellent airflow/filtration, and antibacterial/antimicrobial properties. Polymer membranes and metal−organic frameworks (MOFs) have demonstrated high effectiveness in air filtration and purification. MOF nanoparticles have been introduced into electrospun polymer nanofibrous membranes through embedding or postsolution growth. However, the derived hybrids are still facing the issue of (1) limited MOF exposure, which leads to low efficacy; and (2) uncontrollable growth, which leads to pore blocking and low breathability. In this work, we customized an electrospray-on-electrospinning in situ process to dynamically integrate MOF nanoparticles into a robust and elastic continuous nanofibrous membrane for advanced properties including high mechanical strength and flexibility, excellent breathability, particle filtration, and good antimicrobial performance. Biodegradable polylactic acid was reinforced by the poly(hydroxybutyrate)-di-poly(DLA-CL) x copolymer (PHBR) and used as an electrospinning matrix, while MOF nanoparticles were simultaneously electrically sprayed onto the nanofibers with easily controllable MOF loading. The MOF nanoparticles were homogeneously deposited onto nanofibers without clogging the pores in the membrane. The collision of PLA and MOF under the wet status during electrospinning and the hydrogen bonding through C� O and N−H bonds strengthen the affinity between PLA nanofibers and MOF nanoparticles. Because of these factors, the MOFincorporated PLA/PHBR nanofibrous membrane achieved over 95% particle filtration efficiency with enhanced mechanical properties while maintaining high breathability. Meanwhile, it exhibits excellent photocatalytic antibacterial performance, which is necessary to kill microbes. The electrospray-on-electrospinning in situ process provides an efficient and straightforward way to hybridize one-dimensional (1D) or two-dimensional (2D) nanomaterials into a continuous nanofibrous membrane with strong interaction and controllable loading. Upon integrating proper functionalities from the materials, the obtained hybrids are able to achieve multifunctionalities for various applications.

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Section: Resultsmentioning

confidence: 99%

Electrospray-on-Electrospun Breathable, Biodegradable, and Robust Nanofibrous Membranes with Photocatalytic Bactericidal Activity

Lim

Yap

Teng

et al. 2023

ACS Appl. Nano Mater.

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“…The Ligand to metal charge transfer (LMCT) process generates photoelectrons, which are collected as paramagnetic Zn + sites on the surface of ZIF-8 and subsequently transported from the Zn + center to O 2 and H 2 O [ 18 , 36 ]. This process generates ROS, which aids the photocatalytic inactivation of microorganisms [ 20 ]. Since H 2 O 2 is thought to be the principal active antibacterial ROS, we tested the capacity of ZIF-8 to generate H 2 O 2 in the presence of light using 3,3,5,5-tetramethylbenzidine (TMB) [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, traditional ZIF-8 can also release zinc ions and 2-methylimidazole to kill E. coli effectively under a variety of environmental conditions [ 19 ]. However, light-driven inactivation of bacteria as a photocatalyst is the main source of antibacterial ability in traditional ZIF-8 [ 20 , 21 , 22 ]. However, ZIF-8 has not been directly used to inhibit Gram-positive S. aureus to date.…”

Section: Introductionmentioning

confidence: 99%

A Cruciform Petal-like (ZIF-8) with Bactericidal Activity against Foodborne Gram-Positive Bacteria for Antibacterial Food Packaging

Shen¹,

Wang²,

Wang

et al. 2022

IJMS

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Most antibacterial nanomaterials used in food packaging act by releasing reactive oxygen species (ROS), which cannot efficiently have an inhibitory effect by penetrating the cell wall of Gram-positive Staphylococcus aureus. In this work, we used the cruciform petal-like zeolite imidazole framework-8 (ZIF-8) synthesized in the water phase which can release active Zn compounds in aqueous solution and exert a stronger inhibitory effect on S. aureus. The experimental results demonstrated that the aqueous cruciform petal-like ZIF-8 has the same photocatalytic activity as traditional ZIF-8 and can be applied in photocatalytic bacterial inactivation. The cruciform petal-like ZIF-8 was also shown to release active Zn compounds in aqueous solution with a better antibacterial effect against S. aureus, reaching 95% inactivation efficiency. The antibacterial effect was therefore 70% higher than that of traditional ZIF-8. Based on its excellent antibacterial properties, we loaded petal-like ZIF-8, PDA and PVA onto ordinary fibers to prepare ZIF-8-Film. The results further showed that ZIF-8-Film has a high filtration capacity, which can be used in antibacterial packaging material with the required air permeability. Moreover, ZIF-8-Flim can clean the surface on its own and can maintain a sterile environment. It is different from other disposable materials on the market in that it can be reused and has a self-disinfection function.

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“…The centrifugal solids were dried in an oven at 60 °C for 24 h to obtain the white powder (abbreviated to ZIF-8). ZIF-8 was treated in oxygen atmosphere at 200 °C for 5 h to obtain the modified-ZIF-8, which was proposed as T-ZIF-8 [ 13 ].…”

Section: Methodsmentioning

confidence: 99%

“…2-Methylimidazole zinc salt (abbreviated as ZIF-8) stands out from MOFs because of its low cost, low biological toxicity, strong antibacterial activity and other characteristics [ 11 , 12 ]. It can decompose the toxin produced by dead bacteria into non-toxic small molecule CO 2 and H 2 O, to achieve self-cleaning and antibacterial effect, and become the first choice of antibacterial agent for antibacterial masks [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Covalent Bonding Enhanced Polypropylene Based T-ZIF-8 Masterbatch with Superior Photocatalytic and Antibacterial Performances

Zhang

Qiao

Wang

et al. 2023

J Inorg Organomet Polym

Self Cite

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In order to solve the problem of poor compatibility between modified-ZIF-8 nanoparticles and mask matrix polypropylene (PP) and melt-blown materials, in this work, PP based modified-ZIF-8 antibacterial masterbatch was prepared employing surface modification and torque blending method. IR, SEM, XRD, XPS, DSC results confirm that the antibacterial masterbatch maintains the chemical and crystal structure of modified-ZIF-8 and the thermal stability of PP. Photocatalytic performance indicates that the antibacterial masterbatch basically maintains the photoresponse range of modified-ZIF-8, has narrower band gap and the superior photocatalytic performance than that of modified-ZIF-8. The photocatalytic antibacterial mechanism of ·O 2 − and h + as antibacterial active species is revealed according to the energy band structure and free radical capture experiment. The photocatalytic antibacterial activity of the antibacterial masterbatch against Staphylococcus aureus and Escherichia coli under different dosage holds that the relationship between antibacterial rate and antibacterial agent concentration conforms to Beta distribution, demonstrating second-order kinetic behavior. The antibacterial properties reach the maximum when the loading of modified-ZIF-8 is 2% of the total weight of PP and melt-blown materials. S. aureus and E. coli could be completely killed when the simulated sunlight is irradiated for 30 min. These results indicate that PP based modified-ZIF-8 antibacterial masterbatch has potential application in photocatalytic antibacterial masks.

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Thermal oxygen sensitization modification and its visible light catalytic antibacterial performance for ZIF-8

Cited by 24 publications

References 25 publications

Electrospray-on-Electrospun Breathable, Biodegradable, and Robust Nanofibrous Membranes with Photocatalytic Bactericidal Activity

Electrospray-on-Electrospun Breathable, Biodegradable, and Robust Nanofibrous Membranes with Photocatalytic Bactericidal Activity

A Cruciform Petal-like (ZIF-8) with Bactericidal Activity against Foodborne Gram-Positive Bacteria for Antibacterial Food Packaging

Covalent Bonding Enhanced Polypropylene Based T-ZIF-8 Masterbatch with Superior Photocatalytic and Antibacterial Performances

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