Effect of preparation methodology on the colour and the NIR reflectance of nickel doped manganese pyrophosphate

Elakkiya, V.; Sumathi, S.

doi:10.1016/j.jallcom.2018.07.236

Cited by 13 publications

(4 citation statements)

References 52 publications

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“…When the initial Cu content was up to 25 mol %, the IR absorption bands at the 938 and 729 cm –1 are characteristic for the POP asymmetric and symmetric stretch bridge vibrations, respectively. The symmetric and antisymmetric stretching frequencies of PO 3 are generally observed in the 1100–1000 (1093, 1042 cm –1 ) and 1250 cm –1 (1172 cm –1 ) regions, respectively . The POP bridge and PO3 groups were the fundamental vibrating units of the [P 2 O 7 ] 4– anion, which confirmed the CaCu P 2 O 7 appearing in sample 6 (Table ).…”

Section: Resultssupporting

confidence: 58%

“…The symmetric and antisymmetric stretching frequencies of PO 3 are generally observed in the 1100−1000 (1093, 1042 cm −1 ) and 1250 cm −1 (1172 cm −1 ) regions, respectively. 29 The POP bridge and PO3 groups were the fundamental vibrating units of the [P 2 O 7 ] 4− anion, which confirmed the CaCu P 2 O 7 appearing in sample 6 (Table 1).…”

Section: ■ Results and Discussionsupporting

confidence: 54%

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Osteogenic, Angiogenic, and Antibacterial Bioactive Nano-Hydroxyapatite Co-Synthesized Using γ-Polyglutamic Acid and Copper

Shu

Liao

Wang

et al. 2020

ACS Biomater. Sci. Eng.

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Nano-antibacterial calcium phosphate (CaP) has attracted intense attention with regard to its wide variety of medical and biological applications. The γ-polyglutamic acid and copper cosynthesized hydroxyapatite (γ-PGA/Cu x HAp) was synthesized using the wet method. Structural and chemical characterizations demonstrate that copper was quantitatively incorporated into the hydroxyapatite structure, and the degree of Cu substitution was up to 20 mol % in the synthesized nanocrystals. Morphology characterization showed that the size of the γ-PGA/Cu x HAp nanoparticles decreases with the increased copper content. γ-PGA/Cu x HAp exhibited a steady release of Cu ions. Two experimental protocols were applied to compare the antibacterial activity of the γ-PGA/Cu x HAp samples. A positive correlation was observed between Cu content and the inhibition of bacterial growth. The study also showed that nanoparticles with smaller particle sizes exhibited higher antibacterial activities than the larger particles. Endothelial and osteoblast cells rapidly proliferated on γ-PGA/Cu x HAp, whereas high concentrations (20 mol %) of Cu ions reduced cell proliferation. In the rat calvarial defect model, some γ-PGA/Cu x HAp samples such as γ-PGA/Cu x HAp (x = 8, 16) showed efficient bone regeneration capacities at 12 weeks post implantation. Thus, the multibiofunctional γ-PGA/Cu x HAp nanocomposite exhibited degradative, angiogenic, bactericidal and bone regenerative properties, providing a potential means to address some of the critical challenges in the field of bone tissue engineering.

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Section: Resultssupporting

confidence: 58%

Section: ■ Results and Discussionsupporting

confidence: 54%

Osteogenic, Angiogenic, and Antibacterial Bioactive Nano-Hydroxyapatite Co-Synthesized Using γ-Polyglutamic Acid and Copper

Shu

Liao

Wang

et al. 2020

ACS Biomater. Sci. Eng.

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“…As it is widely accepted that the optical, magnetic, and other physical/chemical properties are greatly influenced by the preparation methodology, it is necessary to carry out a detailed research so as to select a suitable method of synthesis to achieve the desired properties (exclusive size, shape, particle distribution, and crystallinity) on the resultant material . Water-borne methods are much preferred over organic solvent-based methods due their non-toxic nature.…”

Section: Introductionmentioning

confidence: 99%

“…24,25 As it is widely accepted that the optical, magnetic, and other physical/chemical properties are greatly influenced by the preparation methodology, it is necessary to carry out a detailed research so as to select a suitable method of synthesis to achieve the desired properties (exclusive size, shape, particle distribution, and crystallinity) on the resultant material. 26 Water-borne methods are much preferred over organic solventbased methods due their non-toxic nature. A lot of research is being undertaken to synthesize micro-and nano-structured YPO 4 with desired properties, from the traditional solid state reaction route to versatile wet chemical routes, including precipitation method, hydrothermal method, solvo-thermal methods, and ion-exchange reactions.…”

Section: Introductionmentioning

confidence: 99%

Bismuth and Vanadium-Substituted Yttrium Phosphates for Cool Coating Applications

Elakkiya

Sumathi

2022

ACS Omega

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Luminescent yttrium phosphate is engineered into an environmentally benign near infrared (NIR) reflective yellow pigment by the substitution of bismuth and vanadium metals in the host lattice. A series of YP (1−x) V x O 4 (x = 0, 0.05, 0.1, 0.15, 0.2, and 0.4), Y (1−y) Bi y PO 4 (y = 0.1 and 0.3), and Y (1−y) Bi y P (1−x) V x O 4 (x = y = 0.2, 0.4, and 0.6) were prepared by the precipitation method. Secondary phase was noticed at x = 0.2 and y = 0.2 while substituting vanadium and bismuth, respectively, due to high ionic radii of the dopant ions. Co substitution of vanadium and bismuth in the YPO 4 lattice enhanced both NIR reflectance and yellow color of all the fabricated materials. XPS spectra proved the presence of trivalent bismuth and pentavalent vanadium in Y 0.4 Bi 0.6 P 0.4 V 0.6 O 4 . Due to the substitution effect, a more defined morphology was noticed, which enhanced the scattering co-efficient of the fabricated materials; hence, the NIR reflectance of the materials was increased from 68% (YPO 4 ) to 83% (Y 0.4 Bi 0.6 P 0.4 V 0.6 O 4 ). Chemical and thermal stability test of Y 0.4 Bi 0.6 P 0.4 V 0.6 O 4 confirmed the color and strength of the designed pigment. With good yellow hue (b* = +56.06), high NIR solar reflectance (R* = 83%), and good stability, Y 0.4 Bi 0.6 P 0.4 V 0.6 O 4 can act as an environmentally benign cool yellow pigment.

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Low-temperature synthesis of bismuth and vanadium substituted LaPO4 near-infrared reflective pigment and its aging resistance nature on PMMA

Abima,

Sumathi

2024

emergent mater.

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Effect of preparation methodology on the colour and the NIR reflectance of nickel doped manganese pyrophosphate

Cited by 13 publications

References 52 publications

Osteogenic, Angiogenic, and Antibacterial Bioactive Nano-Hydroxyapatite Co-Synthesized Using γ-Polyglutamic Acid and Copper

Osteogenic, Angiogenic, and Antibacterial Bioactive Nano-Hydroxyapatite Co-Synthesized Using γ-Polyglutamic Acid and Copper

Bismuth and Vanadium-Substituted Yttrium Phosphates for Cool Coating Applications

Low-temperature synthesis of bismuth and vanadium substituted LaPO4 near-infrared reflective pigment and its aging resistance nature on PMMA

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