Tuning the UV absorbing ability of CeO2 nanoparticles with F− doping

Bao, Bingting; Sun, Ye; Li, Xinxu; Li, Lingyun; Yu, Yan

doi:10.1016/j.flatc.2023.100494

Cited by 11 publications

(1 citation statement)

References 58 publications

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“…CeO 2 is one of the rare earth oxides with good physical and chemical properties such as electrical conductivity, optical properties, and catalysis properties. Therefore, it has been widely used in various fields such as optical [9,10], energy storage [11,12], conductive materials [13,14], ultraviolet absorber materials [15,16], gas sensors [17,18], and biosensors [19][20][21][22][23]. CeO 2 is of great interest in biosensor applications due to its good redox properties caused by surface defects and oxygen vacancies [24].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposited Fabrication of CeO2 Branched-like Nanostructure Used for Nonenzymatic Glucose Biosensor

Nguyet,

Tuan,

Ngan

et al. 2023

Crystals

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The fabrication of nonenzymatic glucose sensors is essential because of the enhancement in the selectivity and accuracy of these sensors. In this work, we used the electrodeposition approach to prepare a CeO2-based electrode for nonenzymatic glucose detection. A CeO2 branched-like nanostructure was successfully fabricated by electrodeposition on the surface of a Au substrate electrode at room temperature. The effects of cyclic voltammetry, CH3COOH content, and scan cycle number on the formation of the CeO2 branched-like nanostructure were investigated. The fabricated electrodes were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The results showed that a CeO2 branched-like nanostructure could be obtained with a CH3COOH content of 1.0 mL and a scan cycle number of 100 in a solution containing 0.015 M Ce(NO3)3, 0.01 M KCl, and 0.02 M CH3COONH4 and with a scan rate of 400 mV/s. The electrochemical characteristics of the sensor were examined by chronoamperometry and cyclic voltammetry. The results showed that the sensitivity of the sensor was 37.72 μA/mM·cm2 and the limit of detection (LOD) of the sensor was 0.093 mM. The findings in this work prove that it is feasible to fabricate CeO2-based sensors for nonenzymatic glucose detection.

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Section: Introductionmentioning

confidence: 99%

Electrodeposited Fabrication of CeO2 Branched-like Nanostructure Used for Nonenzymatic Glucose Biosensor

Nguyet,

Tuan,

Ngan

et al. 2023

Crystals

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Targeted Electron‐Hole Separation to Decoupled Redox‐Active Sites Over a PEA₂PbBr₄/CeO₂ P‐N Heterojunction for Enhanced Photocatalytic Oxidation

Chen,

Ke,

Yang

et al. 2024

Adv Funct Materials

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Photocatalytic selective oxidation of C(sp3)─H bonds into valuable carbonyl compounds offers a promising approach to advance green organic synthesis and contribute to a more sustainable chemical industry. However, significant challenges remain due to the low efficiency of photocatalysts, primarily caused by insufficient charge separation and the limited ability of intermixed surface redox‐active sites to precisely capture photoinduced charge carriers. Here, a PEA2PbBr4/CeO2 (PPB/CeO2) p‐n heterojunction is designed and fabricated. Experimental characterizations and theoretical calculations reveal that a strong internal electric field (IEF) is formed at the interface within the p‐n heterojunction, which drives targeted accumulation of holes on PPB and electrons on CeO2. Importantly, CeO2 displays superior oxygen affinity facilitating O2 reduction, while PPB validates stronger adsorption and activation capability to toluene molecule promoting C─H bond dissociation. In this context, the photoinduced electrons and holes are directionally separated and transported to the decoupled reduction and oxidation sites in the PPB/CeO2, thereby significantly accelerating the aerobic oxidation of C(sp3)─H bonds. Toward photocatalytic oxidation of model substrate toluene, the optimized PPB/CeO2‐5% composite exhibits a toluene conversion rate of 10 050 µmol g−1 h−1, which is nine times enhanced in comparison with blank PPB (1160 µmol g−1 h−1).

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Epoxy resin with both ultraviolet shielding and enhanced thermal mechanical properties: Study on synergistic modification of Ce–Zr–Si oxide nanoparticles and basalt fibers

Li,

Zhang,

Liang

et al. 2023

Polymer Composites

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Composites with good thermomechanical and UV‐shielding properties are essential in fiber‐reinforced composites. This paper focuses on composites' ultraviolet (UV) shielding efficiency with added Ce‐Zr‐Si oxide nanoparticles/epoxy resin. The Ce‐Zr oxide nanoparticles were first functionalized with a silicon coupling agent and ethyl silicate to improve their dispersion and surface activity. In this work, we prepared epoxy nanocomposites with the addition of Ce‐Zr ‐Si oxides(1,3,5,7 wt%) and found that the materials had good enhancement of the UV shielding properties of the epoxy resin matrix. Meanwhile, it was used in basalt fiber (BF)/epoxy composites prepared by the hot‐pressing method, and surface treatment of basalt fibers was carried out. The results showed that the modified fiber composites could effectively enhance the thermomechanical properties of epoxy resin composites. It is noteworthy that the tensile strength and flexural strength of the hybrid composites reached their peak when 5 wt% Ce‐Zr‐Si was added, increasing by 13.8% and 33.67% respectively. The modified (BF)/epoxy composites exhibited improved thermal stability compared to pure epoxy resin, with the maximum weight loss temperature of BF‐1/EP reaching 349°C. The T(UVA) decreased to 2.41%, while the T(UVB) decreased to 0.053%, and almost all the ultraviolet irradiation was blocked. These results show that our prepared composites have good thermomechanical and UV shielding properties.Highlights Ce‐Zr oxide nanoparticles were functionalized with a silicon coupling agent. Ce‐Zr‐Si oxide was added to enhance the ultraviolet shielding efficiency. Modified BFs were composited to improve thermomechanical properties.

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Tuning the UV absorbing ability of CeO2 nanoparticles with F− doping

Cited by 11 publications

References 58 publications

Electrodeposited Fabrication of CeO2 Branched-like Nanostructure Used for Nonenzymatic Glucose Biosensor

Electrodeposited Fabrication of CeO2 Branched-like Nanostructure Used for Nonenzymatic Glucose Biosensor

Targeted Electron‐Hole Separation to Decoupled Redox‐Active Sites Over a PEA₂PbBr₄/CeO₂ P‐N Heterojunction for Enhanced Photocatalytic Oxidation

Epoxy resin with both ultraviolet shielding and enhanced thermal mechanical properties: Study on synergistic modification of Ce–Zr–Si oxide nanoparticles and basalt fibers

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Tuning the UV absorbing ability of CeO2 nanoparticles with F− doping

Cited by 11 publications

References 58 publications

Electrodeposited Fabrication of CeO2 Branched-like Nanostructure Used for Nonenzymatic Glucose Biosensor

Electrodeposited Fabrication of CeO2 Branched-like Nanostructure Used for Nonenzymatic Glucose Biosensor

Targeted Electron‐Hole Separation to Decoupled Redox‐Active Sites Over a PEA2PbBr4/CeO2 P‐N Heterojunction for Enhanced Photocatalytic Oxidation

Epoxy resin with both ultraviolet shielding and enhanced thermal mechanical properties: Study on synergistic modification of Ce–Zr–Si oxide nanoparticles and basalt fibers

Contact Info

Product

Resources

About

Targeted Electron‐Hole Separation to Decoupled Redox‐Active Sites Over a PEA₂PbBr₄/CeO₂ P‐N Heterojunction for Enhanced Photocatalytic Oxidation