Characterization of CeO 2 crystals synthesized with different amino acids

Atla, Shashi B.; Wu, Min-Nan; Pan, Wei; Hsiao, Yu Tang; Sun, Andy; Tseng, Min‐Jen; Chen, Yen–Ju; Chen, Chien‐Yen

doi:10.1016/j.matchar.2014.10.022

Cited by 16 publications

(11 citation statements)

References 28 publications

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“…As shown in Figure S1a, the precursor solution changes from colorless to light brown after 5 min of reaction, ultimately exhibiting a pale-yellow metallic color. Figure S1b shows the corresponding UV–vis absorption spectrum of the mixed reaction solution, wherein the two strong peaks at 256 and 287 nm are attributed to the O 2– to Ce 3+ and O 2– to Ce 4+ charge transfer transitions, respectively. , This result indicates that when L-Arg and L-Car are introduced into the Ce 3+ solution, they immediately form a Car–Ce–Arg complex because of the presence of rich functional groups capable of binding. In addition, the guanidinium group hydrolysis of L-Arg generates numerous OH – ions to promote the formation of Ce–O (Ce(OH) 3 ) clusters.…”

Section: Resultsmentioning

confidence: 96%

Dipeptide Surface Modification and Ultrasound Boosted Phosphatase-Like Activity of the Ceria Nanozyme: Dual Signal Enhancement for Colorimetric Sensors

Xiong

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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The development of innovative nanozymes with superior enzyme-mimicking activities for colorimetric sensor applications has attracted substantial attention in recent years; however, their application has remained challenging in sensitive colorimetric detection owing to their low catalytic activities. The construction of a more efficient nanozyme-based catalytic system would therefore be expected to improve the detection sensitivities of colorimetric sensors. Herein, we report the development of a highly reactive phosphatase-like nanozyme (carnosine-modified nanoceria, CMNC) engineered by introducing distal imidazole-containing amino acid residues onto the nanoceria surfaces to mimic the reaction microenvironment of the native phosphatase. The obtained results showed that CMNC presented a significantly enhanced catalytic activity compared to the bare nanoceria, furthermore discovering that ultrasonic stimulation significantly enhanced the phosphatase-like catalytic performance of CMNC. Based on these findings, as a proof-of-concept demonstration, two ultrasensitive nanozyme-based colorimetric immunoassays were developed for quantifying the C-reactive protein and prostate-specific antigen. Benefiting from the surface modification and ultrasound-enhanced phosphatase-like activity of CMNC, this dual signal-enhancing strategy improved the performances of the corresponding colorimetric sensors, and an approximately 50-fold higher sensitivity was achieved compared to that of the bare nanoceria without ultrasonic irradiation. These results pave the way for the use of nanozymes in highly sensitive biosensors.

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Section: Resultsmentioning

confidence: 96%

Dipeptide Surface Modification and Ultrasound Boosted Phosphatase-Like Activity of the Ceria Nanozyme: Dual Signal Enhancement for Colorimetric Sensors

Xiong

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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“…As illustrated, a defined absorption peak can be seen in the range of 320‐350 nm. Moreover, all the samples represented a strong absorption peak below 400 nm due to the charge‐transfer transition from O 2− (2p) to Ce 4+ (4f) orbitals in CeO 2 . The band gaps estimated by plotting ( αhν ) 2 as a function of hν (Figure B) for the synthesized powders using urea, glycine, glucose, and citric acid fuels was 2.68, 2.70, 2.80, and 3 eV, respectively.…”

Section: Resultsmentioning

confidence: 97%

Solution combustion synthesis of cerium oxide nanoparticles as corrosion inhibitor

Ghahramani

Arabi

Afarani

et al. 2020

Int J Applied Ceramic Tech

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In this study, combustion synthesis of cerium oxide nanoparticles was reported using cerium nitrate hexahydrate as starting material as well as urea, glycine, glucose, and citric acid as fuels. The influence of fuel type on structure, microstructure, band gap, and corrosion inhibition was investigated. X‐ray diffraction (XRD) patterns and scanning electron microscopy micrographs showed that CeO2 nanoparticles with different morphologies were obtained depending on the fuel type. Microstructural changes from unreacted gel to sponge‐like morphologies were resulted by varying the fuel type from urea, glycine, and glucose to citric acid. In addition to Ce–O bonds, Fourier transform infrared analysis showed carbon bonds of carbonaceous compositions from incomplete combustion which were declined during combustion reaction. Furthermore, corrosion analyses showed that samples synthesized using urea fuel released the most Ce+4 ions and could have better protection than other samples.

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“…[9][10][11][12][13][14][15][16] From these listed different oxides, cerium oxide (CeO 2 ) has been found interesting and extensively investigated by researchers. [17][18][19][20][21][22][23][24][25][26][27][28][29] It is identified that CeO 2 crystallizes in two different crystal systems, namely, orthorhombic and cubic, respectively. 10,11 Table II summarizes the structural parameters of CeO 2 that crystallize in two different structures.…”

mentioning

confidence: 99%

Multifunctional CeO₂ Nanomaterials: Wet Chemical Synthesis, Characterization, and NIR Pigmentation Applications

Priyanka

Balamurugan

Ashika

2022

ECS J. Solid State Sci. Technol.

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Herein, we report the methods adopted for the syntheses of nano-scale CeO2 materials by wet chemical routes (solution combustion, hydrothermal, and precipitation by NH4OH and mixture of NH4HCO3 and NH4OH) and their experimental results supported by differential thermal analysis, X-ray diffraction, field-emission scanning electron microscopy energy dispersive X-ray analysis, Fourier transform infrared spectroscopy, and near-infrared characterization techniques. The nano-scale CeO2 materials were obtained through wet chemical and simple calcination methods in a single-step process. The thermal profile of precursor salt ((NH4)2Ce(NO3)6) reveals ~72% of weight loss in the temperature ranges from 30 to 800°C, whereas the different as-obtained CeO2 materials showed ~3-13% of weight loss indicating the formation of cubic nanostructured CeO2 materials, as evidenced from XRD patterns. All of the pure materials obtained in a single step crystallized in cubic nanostructured CeO2 phase with the average crystalline sizes in the range of 3–28 nm. The morphology of the combustion obtained CeO2 materials exhibits spherical-shaped fine particles with moderate agglomeration. The as-obtained CeO2 materials can be used in the solar reflective and color pigment applications as it shows remarkably high NIR reflectance in the NIR region, 750–2500 nm compared to other binary oxides.

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Characterization of CeO 2 crystals synthesized with different amino acids

Cited by 16 publications

References 28 publications

Dipeptide Surface Modification and Ultrasound Boosted Phosphatase-Like Activity of the Ceria Nanozyme: Dual Signal Enhancement for Colorimetric Sensors

Dipeptide Surface Modification and Ultrasound Boosted Phosphatase-Like Activity of the Ceria Nanozyme: Dual Signal Enhancement for Colorimetric Sensors

Solution combustion synthesis of cerium oxide nanoparticles as corrosion inhibitor

Multifunctional CeO₂ Nanomaterials: Wet Chemical Synthesis, Characterization, and NIR Pigmentation Applications

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Characterization of CeO 2 crystals synthesized with different amino acids

Cited by 16 publications

References 28 publications

Dipeptide Surface Modification and Ultrasound Boosted Phosphatase-Like Activity of the Ceria Nanozyme: Dual Signal Enhancement for Colorimetric Sensors

Dipeptide Surface Modification and Ultrasound Boosted Phosphatase-Like Activity of the Ceria Nanozyme: Dual Signal Enhancement for Colorimetric Sensors

Solution combustion synthesis of cerium oxide nanoparticles as corrosion inhibitor

Multifunctional CeO2 Nanomaterials: Wet Chemical Synthesis, Characterization, and NIR Pigmentation Applications

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Product

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Multifunctional CeO₂ Nanomaterials: Wet Chemical Synthesis, Characterization, and NIR Pigmentation Applications