Chlorination of Pr2O3 and Pr6O11. Crystal structure, magnetic and spectroscopic properties of praseodymium oxychloride

in this study, nano-pro 1.8 were synthesized successfully in ionic liquids (iLs) as template assisted ultrasonic irradiation method. Various precipitating agents and different types of ILs were investigated to determine their respective effects on the morphology of the end products. Using hydrazine hydrate as a precipitating agent and 1-carboxymethyl-3-methylimidazolium chloride as a template, spherical structure with an average diameter of 250 nm was obtained. It is worth noting that the prepared material exhibits high peroxidase-like activity and weak oxidase activity. Then, the catalytic oxidation capacity of the nano-pro 1.8 was evaluated by the peroxidase substrate 3,3′,5,5′-tetramethylbenzidine (TMB). The colorless of TMB can be converted into blue oxidized TMB (oxTMB) in the presence of nanopro 1.8 , but trans-resveratrol inhibited its peroxidase-like activity and weakened the blue color. Hence, we developed a sensitive, selective and simple colorimetric method for trans-resveratrol detection using nano-pro 1.8 as peroxidase-like enzyme. A linear relationship was found in the range of 0.30 µM-16 µM trans-resveratrol with the detection limit of 0.29 µM. Satisfactory results were achieved when the method was submitted to the determination of trans-resveratrol in white wine samples.

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“…The binding energies for Pr3d at 932.91 eV (Fig. 5B), are in good agreement with the literature 24 . The O1s spectrum (Fig.…”

Section: Synthesis Of Nano-pro 18 Nanocrystalsupporting

confidence: 91%

Ultrasonic synthesis of nano-PrO1.8 as nanozyme for colorimetric determination of trans-resveratrol

Wang

Liu

et al. 2020

Sci Rep

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“…This is very close to the value of 933.4 eV for Pr 2 O 3 , which was used as a reference for Pr 3+ , and considerably smaller than the value 935.5 eV for PrO 2 which was used as a reference for Pr 4+ . [30,31] In addition, the spin-orbit splitting has been reported to be 20.7 eV for the oxide with Pr 3+ and 17.8 eV for the oxide with Pr 4+ ; [31] thus the 20.9 eV separation of the peaks at 933.18 eV and 954.08 eV from the Pr 3d 5/2 and Pr 3d 3/2 electrons, respectively (Fig. 7), provides further evidence for Pr being solely Pr 3+ .…”

Section: Determination Of the Pr Oxidation Statementioning

confidence: 81%

Crystal growth, structure and optical properties of Pr³⁺-doped yttria-stabilized zirconia single crystals*

Wang

et al. 2021

Chinese Phys. B

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The development of blue semiconductor light-emitting diodes (LEDs) has produced potential applications for Pr-doped materials that can absorb blue light, especially crystals, and we now report structure and optical properties for high-quality Pr-doped single crystals of yttria-stabilized zirconia (YSZ) grown by the optical floating zone (FZ) method. X-ray diffraction (XRD) and Raman spectroscopy showed that all of the single crystal samples were in the cubic phase, whereas the corresponding ceramic samples contained a mixture of monoclinic and cubic phases. X-ray photoelectron spectroscopy (XPS) and electron paramagnetic resonance (EPR) spectroscopy showed that Pr was present as the Pr3+ ion in ceramic rods and single crystals after heating to high temperatures. The absorption and photoluminescence excitation (PLE) spectra of the Pr-doped YSZ crystals measured at room temperature showed strong absorption of blue light, while their photoluminescence (PL) spectra showed five emission peaks at 565 nm, 588 nm, 614 nm, 638 nm, and 716 nm under 450 nm excitation. The optimum luminescence properties were obtained with the crystal prepared using 0.15 mol% Pr6O11, and those with higher concentrations showed evidence of quenching of the luminescence properties. In addition, the color purity of Pr-doped YSZ single crystal reached 98.9% in the orange–red region.

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“…Among them, only Pr has a variety of oxide forms, such as PrO 2 , Pr 2 O 3 , and Pr 6 O 11 . 18 At ambient temperature and pressure, the most stable oxide substance is Pr 6 O 11 , consisting of both Pr(III) and Pr(IV). 19 has been applied for photodegradation 20−22 and humidityindependent gas sensors.…”

Section: Introductionmentioning

confidence: 99%

“…These kinds of elements possibly have redox properties, which can be beneficial for electron transfer. Among them, only Pr has a variety of oxide forms, such as PrO 2 , Pr 2 O 3 , and Pr 6 O 11 . At ambient temperature and pressure, the most stable oxide substance is Pr 6 O 11 , consisting of both Pr(III) and Pr(IV) .…”

Section: Introductionmentioning

confidence: 99%

Praseodymium Oxide Improving the Activity of a Silver-Loaded Calcium Titanate Photocatalyst for Carbon Dioxide Reduction with Water

Qiu

Anzai

Soltani

et al. 2023

ACS Appl. Energy Mater.

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Heterogeneous photocatalytic CO2 reduction with water has attracted great attention. Although the addition of Ag nanoparticles (NPs) as a cocatalyst on a semiconductor photocatalyst has been known to improve both the photocatalytic activity and reaction selectivity for CO2 reduction, the addition of Pr as Pr6O11 species on the surface of an Ag-loaded CaTiO3 (CTO) photocatalyst further improved the photocatalytic activity. The different calcination temperatures for the sample preparation changed the state of Pr species, and it strongly influenced the photocatalytic performance. The Pr6O11 species was found to be loaded between the CTO surface and Ag NPs on the Ag/Pr/CTO photocatalyst, proposing that it improves the electron migration from the CTO photocatalyst to Ag NPs via the Pr6O11 layer.

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Chlorination of Pr2O3 and Pr6O11. Crystal structure, magnetic and spectroscopic properties of praseodymium oxychloride

Cited by 15 publications

References 21 publications

Ultrasonic synthesis of nano-PrO1.8 as nanozyme for colorimetric determination of trans-resveratrol

Ultrasonic synthesis of nano-PrO1.8 as nanozyme for colorimetric determination of trans-resveratrol

Crystal growth, structure and optical properties of Pr³⁺-doped yttria-stabilized zirconia single crystals*

Praseodymium Oxide Improving the Activity of a Silver-Loaded Calcium Titanate Photocatalyst for Carbon Dioxide Reduction with Water

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Chlorination of Pr2O3 and Pr6O11. Crystal structure, magnetic and spectroscopic properties of praseodymium oxychloride

Cited by 15 publications

References 21 publications

Ultrasonic synthesis of nano-PrO1.8 as nanozyme for colorimetric determination of trans-resveratrol

Ultrasonic synthesis of nano-PrO1.8 as nanozyme for colorimetric determination of trans-resveratrol

Crystal growth, structure and optical properties of Pr3+-doped yttria-stabilized zirconia single crystals*

Praseodymium Oxide Improving the Activity of a Silver-Loaded Calcium Titanate Photocatalyst for Carbon Dioxide Reduction with Water

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Crystal growth, structure and optical properties of Pr³⁺-doped yttria-stabilized zirconia single crystals*