β-Cyclodextrin Stabilized Nanoceria for Hydrolytic Cleavage of Paraoxon in Aqueous and Cationic Micellar Media

Miri, Pinki; Karbhal, Indrapal; Satnami, Manmohan L.; Jena, Vinod K; Ghosh, S. K.

doi:10.1021/acsabm.2c01030

Cited by 7 publications

(5 citation statements)

References 47 publications

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“…Our study showed the opposite, with a higher degradation activity of NPs in alkaline conditions. These results are in agreement with the one of Janos et al, Zhan et al, and Miri et al The higher efficiency may be related to the acid–base properties of 4-nitrophenol making it a better leaving group at higher pH or to a change in the surface of CeO 2 NPs. Vincent et al have explained that CeO 2 NPs in suspension can adsorb protons (H + ions) or OH – ions.…”

Section: Discussionsupporting

confidence: 93%

“…Miri et al have demonstrated that the OH – ions adsorbed on the CeO 2 NPs surface are very strong nucleophiles that attack the phosphorus center of POX. The entity responsible of the degradation of POX is indeed the OH – bound on the surface of the NP and not other nucleophiles as HO – or H 2 O present in solution . Taken together, this information explains why at a basic pH the degradation of POX is increased.…”

Section: Discussionmentioning

confidence: 88%

“…Our study aims at completing these results by synthesizing diverse ceria nanoparticles to confirm the effect of morphology and calcination on POX degradation. Besides, some authors have pointed out the effect of pH on degradation of toxicants by a suspension containing metal oxide nanoparticles but contradictory results were obtained. ,,, Therefore, the degradation kinetics of POX in a suspension of CeO 2 NPs at different pH values were evaluated in this study.…”

Section: Introductionmentioning

confidence: 99%

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Tailor-Made Synthesis of Cerium Oxide Nanoparticles for Improving the Skin Decontamination of Paraoxon

Thomas,

Briançon,

Chaput

et al. 2024

ACS Appl. Nano Mater.

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CeO 2 nanoparticles possess catalytic activity for hydrolysis of organophosphates such as paraoxon and nerve agents used in chemical warfare. Intoxication with these highly toxic compounds can occur directly through inhalation or dermal contact and lead to rapid and severe consequences including death. It is therefore necessary to have effective means of skin decontamination, and CeO 2 nanoparticles are promising. In this study, a wide range of CeO 2 nanoparticles were synthesized and their efficiency against paraoxon degradation was evaluated. Nanocubes (NC), nanorods (NR), nano-octahedra (NO), and nanopolyhedra (NPO) were studied along with nanoparticles obtained after calcination (NC*, NR*, NO*, and nanotruncated octahedra NTO*). Results show an influence of calcination, specific surface area, and crystal facets with higher activity for {111} facets compared to {100} facets. pH also impacted POX degradation rates, with higher pH accelerating the degradation. In vitro tests using the Franz cell method demonstrated the skin decontamination efficacy of the CeO 2 nanoparticles. NC* exhibited lower efficiency, possibly due to smaller surface area and limited {100} facet degradation. The most efficient nanoparticles were NR* and NO* followed by NTO* consistently with their degradation efficiency and specific surface area. Notably, NR* and NO* performed comparably to FE (Fuller's earth), the standard powder skin decontaminant on battlefield. Unlike FE that can only adsorb paraoxon, CeO 2 nanoparticles can neutralize it into safer byproducts. This study highlights the interest of CeO 2 nanoparticles and the influence of their physicochemical properties on organophosphorus compound degradation and cutaneous decontamination.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tailor-Made Synthesis of Cerium Oxide Nanoparticles for Improving the Skin Decontamination of Paraoxon

Thomas,

Briançon,

Chaput

et al. 2024

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

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“…For example, enzymes, being biocatalysts with protein-based composition and various specific activities, can be substituted with CeO 2 nanoparticles, as proposed by Xiao et al [202]. CeO 2 nanoparticles have potential applications in oxidative nanozymes, environmental [203], medical [204], and bactericide [205] applications.…”

Section: Strong Oxidantmentioning

confidence: 99%

Innovative Applications of Cerium Oxide-Based Materials in Civil Engineering, Automation, and Energy Sectors

Kozhukharov,

Girginov,

Lilova

et al. 2024

Cerium - Chemistry, Technology, Geology, Soil Science and Economics

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Cerium oxide materials exhibit remarkable properties, positioning them as highly effective, environmentally friendly solutions across diverse applications. This chapter provides a comprehensive overview of fundamental concepts and technological methodologies related to cerium oxide (CeO2) and doped ceria-based materials. Emphasis is placed on electrochemical deposition, spray pyrolysis, and the sol-gel approach for synthesizing thin and thick layers of ceria. The versatility of these materials is explored, spanning from corrosion protection layers and specialized ceramic elements for sensor applications to components for solid oxide fuel cells (SOFCs) and electrodes for water-splitting cells. Additionally, the chapter delves into the promising applications of recently developed ceria-based nanomaterials in various fields, marking some advanced methods for CeO2-based materials synthesis. The key findings are succinctly summarized in the concluding section.

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“…On the other hand, nanocubes (5–60 nm), dominated by (100) crystal faces, showed only marginal activity. Alternatively, water-soluble CeO 2 nanoparticles hydrolyzed diethyl 4-nitrophenyl phosphate without general-base catalyst [ 131 ]. To an aqueous solution of Ce(NO 3 ) 3 , β-cyclodextrin was added, and then NaOH solution was introduced.…”

Section: Catalysis Of Ceo 2 (Ceria) For the Hydrol...mentioning

confidence: 99%

Ce-based solid-phase catalysts for phosphate hydrolysis as new tools for next-generation nanoarchitectonics

Komiyama

2023

Science and Technology of Advanced Materials

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This review comprehensively covers synthetic catalysts for the hydrolysis of biorelevant phosphates and pyrophosphates, which bridge between nanoarchitectonics and biology to construct their interdisciplinary hybrids. In the early 1980s, remarkable catalytic activity of Ce 4+ ion for phosphate hydrolysis was found. More recently, this finding has been extended to Ce-based solid catalysts (CeO 2 and Ce-based metal-organic frameworks (MOFs)), which are directly compatible with nanoarchitectonics. Monoesters and triesters of phosphates, as well as pyrophosphates, were effectively cleaved by these catalysts. With the use of either CeO 2 nanoparticles or elegantly designed Ce-based MOF, highly stable phosphodiester linkages were also hydrolyzed. On the surfaces of all these solid catalysts, Ce 4+ and Ce 3+ coexist and cooperate for the catalysis. The Ce 4+ activates phosphate substrates as a strong acid, whereas the Ce 3+ provides metal-bound hydroxide as an eminent nucleophile. Applications of these Ce-based catalysts to practical purposes are also discussed.

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β-Cyclodextrin Stabilized Nanoceria for Hydrolytic Cleavage of Paraoxon in Aqueous and Cationic Micellar Media

Cited by 7 publications

References 47 publications

Tailor-Made Synthesis of Cerium Oxide Nanoparticles for Improving the Skin Decontamination of Paraoxon

Tailor-Made Synthesis of Cerium Oxide Nanoparticles for Improving the Skin Decontamination of Paraoxon

Innovative Applications of Cerium Oxide-Based Materials in Civil Engineering, Automation, and Energy Sectors

Ce-based solid-phase catalysts for phosphate hydrolysis as new tools for next-generation nanoarchitectonics

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