Silica supported ceria nanoparticles: a hybrid nanostructure to increase stability and surface reactivity of nano-crystalline ceria

Munusamy, Prabhakaran; Sanghavi, Shail; Varga, Tamás; Thevuthasan, Suntharampillai

doi:10.1039/c3ra44345k

Cited by 34 publications

(17 citation statements)

References 31 publications

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“…44,45 Corroborating this evidence of ceria on the surface of the bers is the decrease in the peak at 950 cm À1 , which arises from dangling oxygen atoms, as well as a shi in the Si-O-Si asymmetrical stretching at 1100 cm À1 ; both changes are associated with electropositive cerium ions bound to electronegative oxygen in the silica nanobers. 46…”

Section: Resultsmentioning

confidence: 99%

Electrospun silica nanofiber mats functionalized with ceria nanoparticles for water decontamination

et al. 2019

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This study demonstrates the fabrication of nanoceria-immobilized silica nanofibers for efficient water decontamination with easy reuse and regeneration properties. Commercially-available ceria (CeO 2 ) nanoparticles were immobilized on electrospun silica nanofiber mats. Optimal conditions for both oxidation of model trace organic compounds (TrOCs) and hydroxyl-radical formation were determined in batch experiments with ceria nanoparticles. Kinetic experiments showed comparable oxidation rates of positively-and neutrally-charged TrOCs (95 and 98%, respectively) by the nanofiber composites at pH 2 in 0.5 mM H 2 O 2 . We demonstrated the reuse properties of the ceria nanofiber composites, finding less than a 15% reduction in oxidation performance after 10 cycles. In addition to this oxidative performance, the electrospun CeO 2 nanofiber composites are also applicable for adsorbing the persistent contaminant perfluorooctanesulfonic acid (PFOS) through electrostatic interactions. Regeneration of the fibers was enabled through a one-hour heat treatment at 550 C in air. Overall, results from this study show that the nanoceria-immobilized silica nanofibers can be used as efficient oxidative and adsorptive media to treat TrOCs in acidic waters, without use of an additional catalyst separation stage from solution.

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Section: Resultsmentioning

confidence: 99%

Electrospun silica nanofiber mats functionalized with ceria nanoparticles for water decontamination

et al. 2019

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“…Sabia proposed that the Ce 3+ species on the surface of CeO 2 abrasives facilitate the reaction between silicon dioxide and ceria abrasives during the CMP process . Seo et al reported that the Ce 3+ ions on the particle surface catalyze H 2 O dissociation to form −OH groups, which play an influential role in numerous interactions at the solid/aqueous interface, including generating Ce‐O−Si bonds with silicate ions ,…”

Section: Resultsmentioning

confidence: 99%

“…[27] Seo et al reported that the Ce 3 + ions on the particle surface catalyze H 2 O dissociation to form À OH groups, [28] which play an influential role in numerous interactions at the solid/aqueous interface, including generating Ce-OÀ Si bonds with silicate ions. [14,29] We additional investigated the chemical bonding characteristics of FS and ceria abrasives. Figure 9 shows the O 1s spectra for polished FS with silica and ceria.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Chemical Residuals on the Fused Silica during Chemical Mechanical Polishing

Chen

Luo

et al. 2018

ChemistrySelect

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Chemical residuals on fused silica after chemical mechanical polishing with silica and ceria have been analyzed. The surface of fused silica terminates with silanol after being polished with silica abrasives but ends up with Ce‐O−Si in a ceria‐based slurry under the CMP environment. The silanol firstly synthesizes on a fused silica surface polished with ceria, but then further reacts with hydroxyl cerium groups scattering in the slurry forming Ce‐O−Si. It also reveals that polishing fused silica with silica abrasives is an alternative way giving an ultra smooth surface.

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“…Furthermore, Ag nanoparticles have been decorated with Fe 3 O 4 and MnO 2 to improve the stability, biocompatibility and availability of Ag ions. To enhance the already discussed anti-inflammatory activity of ceria nanoparticles, Munusamy et al stabilized their oxidation state by immobilization on silica supports [ 96 ].…”

Section: Metal Oxide Nanoparticle Hybrid Materialsmentioning

confidence: 99%

Uniting Drug and Delivery: Metal Oxide Hybrid Nanotherapeutics for Skin Wound Care

2020

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Wound care and soft tissue repair have been a major human concern for millennia. Despite considerable advancements in standards of living and medical abilities, difficult-to-heal wounds remain a major burden for patients, clinicians and the healthcare system alike. Due to an aging population, the rise in chronic diseases such as vascular disease and diabetes, and the increased incidence of antibiotic resistance, the problem is set to worsen. The global wound care market is constantly evolving and expanding, and has yielded a plethora of potential solutions to treat poorly healing wounds. In ancient times, before such a market existed, metals and their ions were frequently used in wound care. In combination with plant extracts, they were used to accelerate the healing of burns, cuts and combat wounds. With the rise of organic chemistry and small molecule drugs and ointments, researchers lost their interest in inorganic materials. Only recently, the advent of nano-engineering has given us a toolbox to develop inorganic materials on a length-scale that is relevant to wound healing processes. The robustness of synthesis, as well as the stability and versatility of inorganic nanotherapeutics gives them potential advantages over small molecule drugs. Both bottom-up and top-down approaches have yielded functional inorganic nanomaterials, some of which unite the wound healing properties of two or more materials. Furthermore, these nanomaterials do not only serve as the active agent, but also as the delivery vehicle, and sometimes as a scaffold. This review article provides an overview of inorganic hybrid nanotherapeutics with promising properties for the wound care field. These therapeutics include combinations of different metals, metal oxides and metal ions. Their production, mechanism of action and applicability will be discussed in comparison to conventional wound healing products.

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Silica supported ceria nanoparticles: a hybrid nanostructure to increase stability and surface reactivity of nano-crystalline ceria

Cited by 34 publications

References 31 publications

Electrospun silica nanofiber mats functionalized with ceria nanoparticles for water decontamination

Electrospun silica nanofiber mats functionalized with ceria nanoparticles for water decontamination

Investigation of the Chemical Residuals on the Fused Silica during Chemical Mechanical Polishing

Uniting Drug and Delivery: Metal Oxide Hybrid Nanotherapeutics for Skin Wound Care

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