Decontamination of Chemical Warfare Agents on sensitive equipment materials using Zr 4+ and Ge 4+ co-doped TiO 2 and hydrofluoroether suspension

Zhong, Sheng; Zhong, Jinyi; Han, Xiaoyuan; Wang, Lingyun; Cui, Yan; Chen, Likun; Zheng, Yong‐Chao

doi:10.1016/j.cej.2016.04.153

Cited by 19 publications

(12 citation statements)

References 30 publications

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“…Organophosphorus agents (OPs) are used often as pesticides, nerve agents, and plasticizers, and they can deactivate acetylcholinesterase, which may cause further severe diseases for humans . Catalytic chemical degradations and other protocols have been used for the removal and/or degradation of OPs. − Early on, organophosphorus hydrolases (OPHs) were utilized as catalysts for the degradation of OPs. − However, the poor stability and limited availability of OPHs are the drawbacks for practical applications. In recent years, by mimicking the active center of OPHs, many heterogeneous catalysts − have been explored for hydrolysis of OPs.…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis of Organophosphorus Agents Catalyzed by Cobalt Nanoparticles Supported on Three-Dimensional Nitrogen-Doped Graphene

Yan

et al. 2021

Inorg. Chem.

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Catalytic chemical degradations and many other methodologies have been explored for the removal and/or degradation of organophosphorus agents (OPs) that are often used as pesticides, nerve agents, and plasticizers. To explore more efficient and recyclable catalysts for the removal and/or degradation of OPs, we fabricate the composites of cobalt nanoparticles and three-dimensional nitrogen-doped graphene (Co/3DNG). We demonstrate that OPs can be hydrolyzed efficiently at ambient temperature by the Co/3DNG. Because of the unique structural and chemical properties of the supporting matrix 3DNG and active species Co−N, the catalytic activities of Co/3DNG composites are much higher than those of bare 3DNG, Co nanoparticles, or the Co nanoparticles physically mixed with 3DNG. We conclude that in the Co/3DNG composites, the interaction between 3DNG and Co stabilizes and distributes well the Co nanoparticles and affords the active catalytic species Co−N.

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Section: Introductionmentioning

confidence: 99%

Hydrolysis of Organophosphorus Agents Catalyzed by Cobalt Nanoparticles Supported on Three-Dimensional Nitrogen-Doped Graphene

Yan

et al. 2021

Inorg. Chem.

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“…Thus, protection against CWA exposure is unfortunately a persistent need for civilian, medical, and military personnel, and numerous studies have been and are being undertaken to explore the chemical mechanisms of CWA destruction, decontamination, and sensing. 1,[5][6][7][8] Air filtration systems are the first line of defense for personnel protection against CWAs. The most widely-used material in gas-mask filters for commercial, industrial, and military applications is ASZM-TEDA®, a high surface area composite of porous, activated carbon adsorbent impregnated with triethylenediamine (TEDA) and compounds (presumably oxides) of Cu ('A'), Ag ('S'), Zn ('Z'), and Mo ('M').…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and Computational Investigation of Room-Temperature Decomposition of a Chemical Warfare Agent Simulant on Polycrystalline Cupric Oxide

et al. 2017

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Certain organophosphorous molecules are infamous due to their use as highly toxic nerve agents. The filtration materials currently in common use for protection against chemical warfare agents were designed before organophosphorous compounds were used as chemical weapons. A better understanding of the surface chemistry between simulant molecules and the individual filtration-material components is a critical precursor to the development of more effective materials for filtration, destruction, decontamination, and/or sensing of nerve agents. Here, we report on the surface adsorption and reactions of a sarin simulant molecule, dimethyl methylphosphonate (DMMP), with cupric oxide surfaces. In situ ambient pressure X-ray photoelectron and infrared spectroscopies are coupled with density functional calculations to propose mechanisms for DMMP decomposition on CuO. We find extensive room temperature decomposition of DMMP on CuO, with the majority of decomposition fragments bound to the CuO surface. We observe breaking of PO-CH3, P-OCH3, and P-CH3 bonds at room temperature. On the basis of these results, we identify specific DMMP decomposition mechanisms not seen on other metal oxides. Participation of lattice oxygen in the decomposition mechanism leads to significant changes in chemical and electronic surface environment, which are manifest in the spectroscopic and computational data. This study establishes a computational baseline for the study of highly toxic organophosphorous compounds on metal oxide surfaces.

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“…In applications, such as decontamination [2], sensing [1], personnel protection [3], and decomposition [1], metal oxides are frequently used. Under-coordinated metal atoms and hydroxyl groups are the common surface binding sites for the phosphoryl moiety of DMMP [1].…”

Section: Introductionmentioning

confidence: 99%

Thermal desorption of dimethyl methylphosphonate from MoO₃

Head

Tang

Hicks

et al. 2017

Catalysis, Structure & Reactivity

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Organophosphonates are used as chemical warfare agents, pesticides, and corrosion inhibitors. New materials for the sorption, detection, and decomposition of these compounds are urgently needed. To facilitate materials and application innovation, a better understanding of the interactions between organophosphonates and surfaces is required. To this end, we have used diffuse reflectance infrared Fourier transform spectroscopy to investigate the adsorption geometry of dimethyl methylphosphonate (DMMP) on MoO 3 , a material used in chemical warfare agent filtration devices. We further applied ambient pressure X-ray photoelectron spectroscopy and temperature programmed desorption to study the adsorption and desorption of DMMP. While DMMP adsorbs intact on MoO 3 , desorption depends on coverage and partial pressure. At low coverages under UHV conditions, the intact adsorption is reversible. Decomposition occurs with higher coverages, as evidenced by PCH x and PO x decomposition products on the MoO 3 surface. Heating under mTorr partial pressures of DMMP results in product accumulation.

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Decontamination of Chemical Warfare Agents on sensitive equipment materials using Zr 4+ and Ge 4+ co-doped TiO 2 and hydrofluoroether suspension

Cited by 19 publications

References 30 publications

Hydrolysis of Organophosphorus Agents Catalyzed by Cobalt Nanoparticles Supported on Three-Dimensional Nitrogen-Doped Graphene

Hydrolysis of Organophosphorus Agents Catalyzed by Cobalt Nanoparticles Supported on Three-Dimensional Nitrogen-Doped Graphene

Spectroscopic and Computational Investigation of Room-Temperature Decomposition of a Chemical Warfare Agent Simulant on Polycrystalline Cupric Oxide

Thermal desorption of dimethyl methylphosphonate from MoO₃

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Decontamination of Chemical Warfare Agents on sensitive equipment materials using Zr 4+ and Ge 4+ co-doped TiO 2 and hydrofluoroether suspension

Cited by 19 publications

References 30 publications

Hydrolysis of Organophosphorus Agents Catalyzed by Cobalt Nanoparticles Supported on Three-Dimensional Nitrogen-Doped Graphene

Hydrolysis of Organophosphorus Agents Catalyzed by Cobalt Nanoparticles Supported on Three-Dimensional Nitrogen-Doped Graphene

Spectroscopic and Computational Investigation of Room-Temperature Decomposition of a Chemical Warfare Agent Simulant on Polycrystalline Cupric Oxide

Thermal desorption of dimethyl methylphosphonate from MoO3

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Thermal desorption of dimethyl methylphosphonate from MoO₃