A facile ceria–zirconia binary oxide used for degradation of 2-chloroethyl ethyl sulfide

Abstract

Ceria-zirconia binary oxides (Ce x Zr 1-x O 2 ) with different Ce/Zr ratios were prepared through a facile co-precipitation method using ammonia as the precipitating agent, and used for the first time as reactive sorbents for degradation of 2-chloroethyl ethyl sulfide (2-CEES). The synthesized samples were characterized by XRD, Raman spectroscopy, BET, TGA-DSC, XPS, as well as CO 2 -TPD. The results revealed that Ce 0.5 Zr 0.5 O 2 exhibited the best degradation performance, hence providing its possible applicability as a new reactive sorbent against CWAs. The 2-CEES was destroyed through the hydrolysis and elimination by surface bound alkoxy species formed on the surface of ceria-zirconia binary oxides. The chemisorbed water and the strong basicity were the key factors to the effective degradation of 2-CEES.

UiO-66-NH2 Fabrics: Role of Trifluoroacetic Acid as a Modulator on MOF Uniform Coating on Electrospun Nanofibers and Efficient Decontamination of Chemical Warfare Agent Simulants

“…Firmly, the high degradation of CEES can be attributed to the synergistic effect of adsorption and catalysis of nanofibers and UiO-66-NH 2 . Table summarizes the consequences of various protective materials against CWAs reported in other articles, highlighting the advanced degradation of our developed UiO-66-NH 2 @PAN fabrics. ,,,− …”

Mono- and Di-Sc-Substituted Keggin Polyoxometalates: Effective Lewis Acid Catalysts for Nerve Agent Simulant Hydrolysis and Mechanistic Insights

“…Since Lewis acidic sites are available to bind nerve agents and activate the phosphorus oxygen bond, the hydrolysis rate is significantly increased. A series of Zr-based hydrolytic catalysts including metal oxides, metal hydroxides, and metal–organic frameworks (MOFs) − have been reported, but due to their heterogeneous nature, it is difficult to determine the exact structure of active sites. Therefore, developing molecular catalysts with Lewis acidic centers contributes to understanding the hydrolytic mechanism and governing factors during the decontamination process.…”

Synthesis of MgO-ZrO2 Mixed Nanoparticles via Different Precursors: Identification of their Destructive Action for Organic Pollutants

“…Nanooxides play an important role in applied chemistry due to their vast applications such as semiconductors [1], biodiesel applications [2], catalytic application [3,4], biological applications [5], glaze applications [6], purification of oils [7] and photocatalytic degradation of organic pollutants [8][9][10][11][12]. Though many sorbents were tried for the decontamination of CWA's; viz activated carbon [13,14] or polymer [15,16], but the use of mixed metal oxide nanoparticles showed more satisfactory results [17,18] due to their high surface area, crystallinity, different morphologies and easily separation of electron hole pairs which are necessary for generating free radicals which decompose these organic pollutants [19]. Among of these oxides, very little work about the nanoscaled Magnesia-Zirconia mixed oxides (MgO-ZrO 2 ) was reported throughout literature survey.…”