Synthesis of CeO2 as promising adsorbent for the management of free-DNA harboring antibiotic resistance genes from tap-water

Anthony, Eric Tobechukwu; Ojemaye, Mike O.; Okoh, Anthony I.; Okoh, Omobola O.

doi:10.1016/j.cej.2020.125562

Cited by 27 publications

(13 citation statements)

References 77 publications

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“…The band at 3421 cm –1 is associated with the O–H stretching vibration, and the bands at 1059, 1155, and 1385 cm –1 correspond to unwanted carbon residues in samples. , The bands at 850 and 722 cm –1 correspond to Ce–O–Ce stretching modes. The band at 568 cm –1 is ascribed to Ce–O stretching vibrations. , An electron paramagnetic resonance (EPR) test was performed to detect any unpaired electrons in samples (Figure f). Comparing CeO 2– x and Pd NPs/CeO 2– x , a sharp signal at a g value of 2.003 was noticed after deposition of isolated single palladium atoms on the support, implying the presence of unpaired electrons in Pd 1 /CeO 2– x .…”

Section: Resultsmentioning

confidence: 99%

“…The band at 568 cm −1 is ascribed to Ce− O stretching vibrations. 36,37 An electron paramagnetic resonance (EPR) test was performed to detect any unpaired electrons in samples (Figure 2f). Comparing CeO 2−x and Pd NPs/CeO 2−x , a sharp signal at a g value of 2.003 was noticed after deposition of isolated single palladium atoms on the support, implying the presence of unpaired electrons in Pd 1 / CeO 2−x .…”

Section: Resultsmentioning

confidence: 99%

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Selective Hydrogenation on a Highly Active Single-Atom Catalyst of Palladium Dispersed on Ceria Nanorods by Defect Engineering

Dong

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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Single-atom catalysis represents a new frontier that integrates the merits of homogeneous and heterogeneous catalysis to afford exceptional atom efficiency, activity, and selectivity for a range of catalytic systems. Herein we describe a simple defect engineering strategy to construct an atomically dispersed palladium catalyst (Pdδ+, 0 < δ < 2) by anchoring the palladium atoms on oxygen vacancies created in CeO2 nanorods. This was confirmed by spherical aberration correction electron microscopy and extended X-ray absorption fine structure measurement. The as-prepared catalyst showed exceptional catalytic performance in the hydrogenation of styrene (99% conversion, TOF of 2410 h–1), cinnamaldehyde (99% conversion, 99% selectivity, TOF of 968 h–1), as well as oxidation of triethoxysilane (99% conversion, 79 selectivity, TOF of 10 000 h–1). This single-atom palladium catalyst can be reused at least five times with negligible activity decay. The palladium atoms retained their dispersion on the support at the atomic level after thermal stability testing in Ar at 773 K. Most importantly, this synthetic method can be scaled up while maintaining catalytic performance. We anticipate that this method will expedite access to single-atom catalysts with high activity and excellent resistance to sintering, significantly impacting the performance of this class of catalysts.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Selective Hydrogenation on a Highly Active Single-Atom Catalyst of Palladium Dispersed on Ceria Nanorods by Defect Engineering

Dong

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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“…The Sips model is a combination of Freundlich and Langmuir models oen used to describe complex adsorption systems. 53,54 Thus, phenanthrene interaction with C 16 -GQDs is highly heterogeneous, which explains the considerably more signicant heterogeneity (N & m s ) index of 2.85 and 8.00, respectively (Table 2). Experimental data tended more towards multilayer adsorption (Freundlich) than monolayer adsorption (Langmuir), considering the R 2 values.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Solution pH and the presence of anions/cations inuence the adsorption performance of adsorbents towards eliminating hydrophobic organic compounds from aqueous solution. 54,55 Altering the pH of the solution may affect the surface charge of the sorbent and sorbate molecule. 30 The impact of pH variation is more prominent in solutes and sorbents with protonated moieties (-OH, -COOH, -NH 2 group, etc.)…”

Section: Effect Of Hydrochemistrymentioning

confidence: 99%

Hexadecylamine functionalised graphene quantum dots as suitable nano-adsorbents for phenanthrene removal from aqueous solution

2022

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“…Ceria coordinates the phosphate of the nucleic acid, albeit with lower affinity relative to arsenic (V), so the latter can displace the DNA from ceria NPs and generate an electrochemical signal [ 150 , 151 ]. The ability of ceria NPs to bind free DNA was also exploited to adsorb antibiotic-resistance genes from tap water to target this issue of public health concern [ 152 ].…”

Section: (Bio)applicationsmentioning

confidence: 99%

Nanostructured Ceria: Biomolecular Templates and (Bio)applications

et al. 2021

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Ceria (CeO2) nanostructures are well-known in catalysis for energy and environmental preservation and remediation. Recently, they have also been gaining momentum for biological applications in virtue of their unique redox properties that make them antioxidant or pro-oxidant, depending on the experimental conditions and ceria nanomorphology. In particular, interest has grown in the use of biotemplates to exert control over ceria morphology and reactivity. However, only a handful of reports exist on the use of specific biomolecules to template ceria nucleation and growth into defined nanostructures. This review focusses on the latest advancements in the area of biomolecular templates for ceria nanostructures and existing opportunities for their (bio)applications.

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Synthesis of CeO2 as promising adsorbent for the management of free-DNA harboring antibiotic resistance genes from tap-water

Cited by 27 publications

References 77 publications

Selective Hydrogenation on a Highly Active Single-Atom Catalyst of Palladium Dispersed on Ceria Nanorods by Defect Engineering

Selective Hydrogenation on a Highly Active Single-Atom Catalyst of Palladium Dispersed on Ceria Nanorods by Defect Engineering

Hexadecylamine functionalised graphene quantum dots as suitable nano-adsorbents for phenanthrene removal from aqueous solution

Nanostructured Ceria: Biomolecular Templates and (Bio)applications

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