View in EDS HTML Full Text PDF Full Text

Fast Alkaline Hydrothermal Synthesis of Pyrophosphate BaCr 2 (P 2 O 7) 2 Nanoparticles and Their NIR Spectral Reflectance.

Saved in:
Bibliographic Details
Title: Fast Alkaline Hydrothermal Synthesis of Pyrophosphate BaCr 2 (P 2 O 7) 2 Nanoparticles and Their NIR Spectral Reflectance.
Authors: Carrillo-Ramírez, Diego Emiliano1 (AUTHOR), Rendón-Angeles, Juan Carlos1,2 (AUTHOR) jcarlos.rendon@cinvestav.edu.mx, Matamoros-Veloza, Zully2,3 (AUTHOR), López-Cuevas, Jorge1,4 (AUTHOR), Juárez-Ramírez, Isaías1,3 (AUTHOR), Ueda, Tadaharu2,4 (AUTHOR)
Source: Nanomaterials (2079-4991). Jul2025, Vol. 15 Issue 13, p982. 21p.
Subjects: Hydrothermal synthesis, Pyrophosphates, Ceramic powders, Optical properties, Nanoparticles, Particle size distribution, Spectral reflectance
Abstract: Recently, the development of nanoparticle pigments has attracted interest in chemical preparation due to their potential functional properties, such as phosphate-based pigments. The present research focuses on the feasibility of synthesising the BaCr2(P2O7)2 pigment under hydrothermal conditions. The effect of the microstructural features of ceramic pigments (the crystalline structure, morphology, and particle size) on their optical properties (colour and reflectance) was also studied. The BaCr2(P2O7)2 compound was prepared in different fluid media, including water and NaOH solutions (0.5–1.0 M), at several reaction temperatures (170–240 °C) and intervals (6–48 h). The single-phase BaCr2(P2O7)2 did not crystallise without by-products (BaCr2O10, BaCr2(PO7)2) in water and the alkaline solutions, even at 240 °C for 48 h; in these fluids, the ionic Cr3+ species oxidised to Cr6+. In contrast, the BaCr2(P2O7)2 single-phase crystallisation was favoured by adding urea as a reductant agent (25.0–300.0 mmol). Monodispersed BaCr2(P2O7)2 fine particles with a mean size of 44.0 nm were synthesised at a low temperature of 170 °C for 6 h with 0.5 M NaOH solution in the presence of 50.0 mmol urea. The phosphate pigment particle grew to approximately 62.0 nm by increasing the treatment temperature to 240 °C. A secondary dissolution–recrystallisation achieved after 24 h triggered a change in the particle morphology coupled with the incrementation of the concentration of NaOH in the solution. The pyrophosphate BaCr2(P2O7)2 pigments prepared in this study belong to the green colour spectral space according to the CIELab coordinates measurement, and exhibit 67.5% high near-infrared (NIR) solar reflectance. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: egs
DbLabel: Engineering Source
An: 186598215
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Fast Alkaline Hydrothermal Synthesis of Pyrophosphate BaCr 2 (P 2 O 7) 2 Nanoparticles and Their NIR Spectral Reflectance.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Carrillo-Ramírez%2C+Diego+Emiliano%22">Carrillo-Ramírez, Diego Emiliano</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rendón-Angeles%2C+Juan+Carlos%22">Rendón-Angeles, Juan Carlos</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> jcarlos.rendon@cinvestav.edu.mx</i><br /><searchLink fieldCode="AR" term="%22Matamoros-Veloza%2C+Zully%22">Matamoros-Veloza, Zully</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22López-Cuevas%2C+Jorge%22">López-Cuevas, Jorge</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Juárez-Ramírez%2C+Isaías%22">Juárez-Ramírez, Isaías</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ueda%2C+Tadaharu%22">Ueda, Tadaharu</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jul2025, Vol. 15 Issue 13, p982. 21p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Hydrothermal+synthesis%22">Hydrothermal synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Pyrophosphates%22">Pyrophosphates</searchLink><br /><searchLink fieldCode="DE" term="%22Ceramic+powders%22">Ceramic powders</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+properties%22">Optical properties</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoparticles%22">Nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Spectral+reflectance%22">Spectral reflectance</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Recently, the development of nanoparticle pigments has attracted interest in chemical preparation due to their potential functional properties, such as phosphate-based pigments. The present research focuses on the feasibility of synthesising the BaCr2(P2O7)2 pigment under hydrothermal conditions. The effect of the microstructural features of ceramic pigments (the crystalline structure, morphology, and particle size) on their optical properties (colour and reflectance) was also studied. The BaCr2(P2O7)2 compound was prepared in different fluid media, including water and NaOH solutions (0.5–1.0 M), at several reaction temperatures (170–240 °C) and intervals (6–48 h). The single-phase BaCr2(P2O7)2 did not crystallise without by-products (BaCr2O10, BaCr2(PO7)2) in water and the alkaline solutions, even at 240 °C for 48 h; in these fluids, the ionic Cr3+ species oxidised to Cr6+. In contrast, the BaCr2(P2O7)2 single-phase crystallisation was favoured by adding urea as a reductant agent (25.0–300.0 mmol). Monodispersed BaCr2(P2O7)2 fine particles with a mean size of 44.0 nm were synthesised at a low temperature of 170 °C for 6 h with 0.5 M NaOH solution in the presence of 50.0 mmol urea. The phosphate pigment particle grew to approximately 62.0 nm by increasing the treatment temperature to 240 °C. A secondary dissolution–recrystallisation achieved after 24 h triggered a change in the particle morphology coupled with the incrementation of the concentration of NaOH in the solution. The pyrophosphate BaCr2(P2O7)2 pigments prepared in this study belong to the green colour spectral space according to the CIELab coordinates measurement, and exhibit 67.5% high near-infrared (NIR) solar reflectance. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=186598215
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/nano15130982
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 21
        StartPage: 982
    Subjects:
      – SubjectFull: Hydrothermal synthesis
        Type: general
      – SubjectFull: Pyrophosphates
        Type: general
      – SubjectFull: Ceramic powders
        Type: general
      – SubjectFull: Optical properties
        Type: general
      – SubjectFull: Nanoparticles
        Type: general
      – SubjectFull: Particle size distribution
        Type: general
      – SubjectFull: Spectral reflectance
        Type: general
    Titles:
      – TitleFull: Fast Alkaline Hydrothermal Synthesis of Pyrophosphate BaCr 2 (P 2 O 7) 2 Nanoparticles and Their NIR Spectral Reflectance.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Carrillo-Ramírez, Diego Emiliano
      – PersonEntity:
          Name:
            NameFull: Rendón-Angeles, Juan Carlos
      – PersonEntity:
          Name:
            NameFull: Matamoros-Veloza, Zully
      – PersonEntity:
          Name:
            NameFull: López-Cuevas, Jorge
      – PersonEntity:
          Name:
            NameFull: Juárez-Ramírez, Isaías
      – PersonEntity:
          Name:
            NameFull: Ueda, Tadaharu
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 07
              Text: Jul2025
              Type: published
              Y: 2025
          Identifiers:
            – Type: issn-print
              Value: 20794991
          Numbering:
            – Type: volume
              Value: 15
            – Type: issue
              Value: 13
          Titles:
            – TitleFull: Nanomaterials (2079-4991)
              Type: main
ResultId 1