Dual-purpose high-efficiency air filter paper loaded with reactive zirconium hydroxide for the filtration aerosols and degradation of chemical warfare agents

Huang, Xingqi; Zhao, Ting; Zhang, Hongpeng; Cao, Yan; Sha, Jiang; Tang, Huamin; Zhu, Haiyan; Wu, Yue

doi:10.1039/d1ra06903a

Cited by 8 publications

(8 citation statements)

References 43 publications

(52 reference statements)

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“…Samples were analyzed using the T-135 method. 48 The residual ratio of HD (R, %) and degradation efficiency (D, %) were obtained as reported. 27,34 Degradation products were detected by GC–MS.…”

Section: Methodsmentioning

confidence: 99%

Catalytic degradation of CWAs with MOF-808 and PCN-222: Toward practical application

Wu¹,

Wang²,

Zhu³

et al. 2022

Journal of Chemical Research

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Chemical warfare agents, such as nerve agents (GD and VX) and blister agents (HD), have strong toxicities to mankind. In recent years, zirconium-based metal-organic frameworks have been found to be attractive materials for chemical warfare agent degradation. Among them, metal-organic framework-808 (MOF-808) and porous coordination network-222 (PCN-222) were the best. However, few papers pay attention to their practical application. In this work, we prepared MOF-808 and PCN-222 using water phase and organic solvothermal methods, respectively. Their performance for the catalytic degradation of chemical warfare agents under practical decontamination conditions was studied. The results showed that MOF-808 displayed a high potency for catalytic hydrolysis of VX (10,000 mg L−1) in unbuffered solution. PCN-222 exhibited weaker reactivity with a half-life ( t1/2) of 28.8 min. Their different performances might stem from the different connectivity of the Zr6 nodes and framework structures. The results illustrated that the hydrolysis of high-concentration GD required a strong alkaline buffer to neutralize the hydrolysis product of hydrofluoric acid (HF) to avoid catalyst poisoning. When H2O2 was used as the oxidant instead of O2, both zirconium-based metal-organic frameworks performed with effective catalytic potency for HD degradation without any special lighting and so was suitable for practical application, whereas the products obtained from HD, such as HDO2 and V-HDO2, still possessed vesicant toxicity. Overall, MOF-808 prepared via a water-phase synthesis performed with effective catalysis for the degradation of high-concentration VX, GD, and HD with t1/2 of < 0.5, 3.1 and 2.2 min, respectively, exhibiting its potential for practical applications.

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Section: Methodsmentioning

confidence: 99%

Catalytic degradation of CWAs with MOF-808 and PCN-222: Toward practical application

Wu¹,

Wang²,

Zhu³

et al. 2022

Journal of Chemical Research

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“…The GFMs-traps showed strong biocidal effects against E. coli and S. aureus (Figure S16, Supporting Information), with a better filtration performance than other high-efficiency filter media comprising glass fibers, particularly those with biocidal properties (Figure 5g and Table S4, Supporting Information). [20,27,44] Therefore, the as-prepared GFMs-traps can be used as bioprotective barriers to reduce the airborne transmission of pathogens.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, it is difficult to endow high‐efficiency filter media (with superfine nanostructures and small pore sizes) with biocidal functions without adversely affecting their filtration performance. [ 27,28,44 ]…”

Section: Resultsmentioning

confidence: 99%

“…Generally, it is difficult to endow high-efficiency filter media (with superfine nanostructures and small pore sizes) with biocidal functions without adversely affecting their filtration performance. [27,28,44] In this study, to incorporate biocidal properties into the asprepared filter media, functional NPs were deposited as traps on the fiber surface of GFMs, maximizing their reactive surface area. The antibacterial activity of the as-prepared GFMstraps were evaluated with Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) using the solution oscillation method.…”

Section: Resultsmentioning

confidence: 99%

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Conformal Build‐Up of Functionalized Air Filters with Improved Air Cleaning and Bioprotective Traps

Zhou,

You,

Wang

et al. 2023

Adv Funct Materials

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Air filtration is vital for passive pollution control toward advanced manufacturing industries and human health protection. However, large‐scale air‐filter utilization is limited by high energy costs. Therefore, it is crucial to develop filter media that exhibit a high removal efficiency, low pressure drop, and stable biocidal effects. This study reports an efficient and scalable bottom‐up approach for fabricating shellac‐based glass fiber matrices with bioprotective traps (GFMs‐traps) with tunable conformal micro/nanostructures, superhydrophobicity, and biocidal functions. The synthesis, which involves freeze‐drying‐free ice‐shellac double‐template formation, perfluorosilane‐based grafting, and filtration, eliminates capillary‐force‐induced micro/nanofibrous cluster formation. Theoretical modeling and experimental results indicate that the air cleaning and biocidal properties of the GFMs‐traps can be attributed to their uniformly distributed micro/nanofibrous structures and stable nanoparticle (NP) coatings (AgNPs, CuNPs, and TiO2NPs). The GFMs‐traps exhibit integrated air cleaning, with excellent filtration performance at the most penetrating particle size (99.97%, 234 Pa), superhydrophobicity (≥150°), a high virus‐filtration efficiency (99.995%), and good antibacterial and antiviral activity. Additionally, a commercial air purifier comprising a GFMs‐trap filter exhibits high potential for commercial applications. The facile strategy for fabricating high‐performance bioprotective filter media reported here may facilitate advanced large‐scale air filtration applications in the future.

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“…However, saturation is easily attained via adsorption, which shortens the protection time and causes secondary pollution . In recent years, nanostructured materials (e.g., metal oxides, − polyoxometalates, − metal hydroxides, − and metal–organic frameworks (MOFs) − ) have been developed to catalytically degrade CWAs into nontoxic or less toxic substances.…”

Section: Introductionmentioning

confidence: 99%

MOF-808 on Polyacrylonitrile Nanofibers for Degradation of Chemical Warfare Agents

Liu,

Li,

Yang

et al. 2023

ACS Appl. Nano Mater.

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Highly efficient and reusable protective materials for chemical warfare agents (CWAs) are in high demand. Here, we used a surface modification technique to develop a material that provides chemical protection. Using an electrospun polyacrylonitrile (PAN) nanofiber membrane as the substrate, we modified the surface of the nanofiber with dopamine hydrochloride, which self-polymerized to form a polydopamine (PDA) surface layer, onto which we loaded metal–organic framework (MOF-808) particles. The presence of PDA on the surface of the PAN nanofibers significantly increased the breaking strength (2-fold increase) and elongation (9-fold increase) of the nanofiber membrane. Moreover, the PDA functionalities formed coordination sites to trigger the in situ growth of MOF-808 particles on the surface of the nanofiber membrane, thereby considerably increasing the growth rate and loading capacity. The surface of the nanofiber membrane was completely covered with MOF-808 particles following solvothermal treatment for 16 h. The MOF-808/PAN/PDA composite membrane could rapidly degrade 99.9% of dimethyl-4-nitrophenyl phosphate to p-nitrophenol within 8 min. After the membrane was used several times, the conversion rate stabilized at 95.9%, indicating that the MOF-808/PAN/PDA composite membrane has significant potential for application as protective clothing for CWAs.

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Dual-purpose high-efficiency air filter paper loaded with reactive zirconium hydroxide for the filtration aerosols and degradation of chemical warfare agents

Abstract: Dual-functional air filter paper with addition of Zr(OH)4 was prepared by an intra-pulp addition method, whose filtration performance is maintained while the decontamination performance is added for HD and VX.

Cited by 8 publications

References 43 publications

Catalytic degradation of CWAs with MOF-808 and PCN-222: Toward practical application

Catalytic degradation of CWAs with MOF-808 and PCN-222: Toward practical application

Conformal Build‐Up of Functionalized Air Filters with Improved Air Cleaning and Bioprotective Traps

MOF-808 on Polyacrylonitrile Nanofibers for Degradation of Chemical Warfare Agents

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