Photo-decontamination of chemical warfare dimethyl methylphosphonate, dimethyl phosphite, diethyl methylphosphonate, diethyl phosphite model molecules on Al and oxidized Al foils

Kim, Taejun; Yang, Joon-Eon; Park, So Jeong; Nguyen, Huu‐Quang; Kim, Jeongkwon; Yee, K. J.; Jung, Heesoo; Kang, Jun Gill; Sohn, Youngku

doi:10.1016/j.apcatb.2020.119623

Cited by 8 publications

(1 citation statement)

References 51 publications

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“…Thereby, DMMP is often used as a simulant in the detection of sarin in laboratory. According to reports, ion mobility spectroscopy [6][7][8] and gas chromatography [9] are the most commonly used methods to detect DMMP because of the high accuracy. But the shortcomings of those techniques are also clear at a glance, such as expensive and timeconsuming, not to mention the unportable size of these equipments for the warfare environment.…”

Section: Introductionmentioning

confidence: 99%

A dimethyl methylphonate sensor based on HFIPPH modified SWCNTs

Wu¹,

Yuan²,

Wu³

et al. 2022

Nanotechnology

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In order to meet the requirements of ultra-fast real-time monitoring of sarin simulator with high sensitivity and selectivity, it is of great significance to develop high performance dimethyl methylphonate (DMMP) sensor. Herein, we proposed a DMMP sensor based on p-hexafluoroisopropanol phenyl (HFIPPH) modified self-assembled single-walled carbon nanotubes (SWCNTs) with field effect transistor (FET) structure. The self-assembly method provides a 4 nanometres thick and micron sized SWCNT channel, with high selectivity to DMMP. The proposed SWCNTs-HFIPPH based sensor exhibits remarkably higher response to DMMP than bare SWCNT based gas sensor within only few seconds. The gas sensing response of SWCNTs-HFIPPH based sensor for 1ppm DMMP is 18.2%, and the response time is about 10 seconds. What's more, the gas sensor we proposed here shows excellent selectivity and reproducibility, and the limitation of detection is as low as ppb level. The proposed method lays the foundation for miniaturization and integration of DMMP sensors, expecting to develop detection system for practical sarin sensing application.

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Section: Introductionmentioning

confidence: 99%

A dimethyl methylphonate sensor based on HFIPPH modified SWCNTs

Wu¹,

Yuan²,

Wu³

et al. 2022

Nanotechnology

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Synergistic Acid‐Base Action Leads to Ultrafast Decontamination of Nerve and Blister Agents by OH⁻ Intercalated Zr⁴⁺‐Doped MgAl‐LDH under Ambient Conditions

Huang,

Yang,

Wang

et al. 2024

Advanced Materials

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Developing materials capable of rapidly decontaminating nerve and blister agents directly under ambient conditions are crucial for practical applications. In this work, Mg3Al1‐xZrx‐LDH with different Zr4+ doping contents and corresponding OH− intercalated materials Mg3Al1‐xZrx‐LDH‐OH are synthesized. First, they are used for the decontamination of nerve agents under ambient conditions, showing that increasing the Zr4+ doping amount accelerates the decontamination rate of diethyl cyanophosphonate (DECP) and soman (GD), with the half‐life of DECP and GD being 3–5 times shorter with Mg3Al0.6Zr0.4‐LDH (the highest Zr4+ doping content) compared to Mg3Al1‐LDH. Notably, the intercalation of OH− in Mg3Al0.6Zr0.4‐LDH further greatly enhances the catalytic activity for DECP and GD, the reaction half‐life of DECP and GD with Mg3Al0.6Zr0.4‐LDH‐OH being 18 s and <15 s, respectively, which is the shortest recorded so far. Additionally, under ambient conditions, Mg3Al0.6Zr0.4‐LDH‐OH exhibits superior detoxification performance for mustard gas (HD) compared to Mg3Al0.6Zr0.4‐LDH, with 92.8% of HD being removed within 6 h. Mechanistic studies reveal that Mg3Al0.6Zr0.4‐LDH‐OH efficiently decontaminates nerve and blister agents utilizing the synergistic effect of Lewis acid‐base sites (Zr4+ and laminate OH groups) and interlayer OH−. To extend the practical applications of the materials, PVA@(PAN/LDH‐OH) self‐detoxifying fiber loaded with Mg3Al0.6Zr0.4‐LDH‐OH is prepared.

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Ultraviolet Light‐Assisted Decontamination of Chemical Warfare Agent Simulant 2‐Chloroethyl Phenyl Sulfide on Metal‐Loaded TiO₂/Ti Surfaces

Jang,

Yun,

Shim

et al. 2024

ChemistryOpen

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The application of ultraviolet (UV) light for the decontamination of chemical warfare agents (CWAs) has gained recognition as an effective method, especially for treating hard‐to‐reach areas where wet chemical methods are impractical. In this study, TiO2/Ti was employed as a model catalyst, which was contaminated with 2‐chloroethyl phenyl sulfide (CEPS), and subjected to photocatalytic decontamination using both UVB and UVC light. Additionally, photocatalytic decontamination efficiency by introducing Au, Pt, and Cu onto the TiO2/Ti surface was explored. During the photodecomposition process under UVC light, at least eight distinct secondary byproducts were identified. It was observed that the introduction of overlayer metals did not significantly enhance the photodecomposition under UVC light instead overlaid Au exhibited substantially improved activity under UVB light. Whereas, photodecomposition process under UVB light, only five secondary products were detected, including novel compounds with sulfoxide and sulfone functional groups. This novel study offers valuable insights into the generation of secondary products and sheds light on the roles of overlayer metals and photon wavelength in the photodecontamination process of CWA.

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Photo-decontamination of chemical warfare dimethyl methylphosphonate, dimethyl phosphite, diethyl methylphosphonate, diethyl phosphite model molecules on Al and oxidized Al foils

Cited by 8 publications

References 51 publications

A dimethyl methylphonate sensor based on HFIPPH modified SWCNTs

A dimethyl methylphonate sensor based on HFIPPH modified SWCNTs

Synergistic Acid‐Base Action Leads to Ultrafast Decontamination of Nerve and Blister Agents by OH⁻ Intercalated Zr⁴⁺‐Doped MgAl‐LDH under Ambient Conditions

Ultraviolet Light‐Assisted Decontamination of Chemical Warfare Agent Simulant 2‐Chloroethyl Phenyl Sulfide on Metal‐Loaded TiO₂/Ti Surfaces

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Photo-decontamination of chemical warfare dimethyl methylphosphonate, dimethyl phosphite, diethyl methylphosphonate, diethyl phosphite model molecules on Al and oxidized Al foils

Cited by 8 publications

References 51 publications

A dimethyl methylphonate sensor based on HFIPPH modified SWCNTs

A dimethyl methylphonate sensor based on HFIPPH modified SWCNTs

Synergistic Acid‐Base Action Leads to Ultrafast Decontamination of Nerve and Blister Agents by OH− Intercalated Zr4+‐Doped MgAl‐LDH under Ambient Conditions

Ultraviolet Light‐Assisted Decontamination of Chemical Warfare Agent Simulant 2‐Chloroethyl Phenyl Sulfide on Metal‐Loaded TiO2/Ti Surfaces

Contact Info

Product

Resources

About

Synergistic Acid‐Base Action Leads to Ultrafast Decontamination of Nerve and Blister Agents by OH⁻ Intercalated Zr⁴⁺‐Doped MgAl‐LDH under Ambient Conditions

Ultraviolet Light‐Assisted Decontamination of Chemical Warfare Agent Simulant 2‐Chloroethyl Phenyl Sulfide on Metal‐Loaded TiO₂/Ti Surfaces