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    <publishedYear>2025</publishedYear>
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    <language>eng</language>
    <pageFirst>22615</pageFirst>
    <pageLast>22635</pageLast>
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    <edition/>
    <issue>45</issue>
    <volume>60</volume>
    <type>article</type>
    <publisherName>Springer Science and Business Media LLC</publisherName>
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    <title language="eng">Synthesis and physicochemical characterization of a novel bismuth silicate templated by tetrapropylammonium bromide and polydiallyldimethylammonium chloride</title>
    <abstract language="eng">A bismuth silicate (BiSi-1) was hydrothermally synthesized using tetrapropylammonium bromide (TPA·Br) as the organic structure-directing agent and shown by multi-scale characterization to be distinct from known Bi–silicates. Powder X-ray diffraction is indexable with an orthorhombic metric (a = 23.234 Å, b = 17.109 Å, c = 3.897 Å), consistent with a highly anisotropic, possibly layered framework. High-resolution TEM/SAED reveals nanocrystalline, plate-like domains assembled into sub-micrometric aggregates with locally oriented lamellae; lattice fringes (0.27–0.32 nm) match the strongest XRD spacings. Solid-state NMR establishes a silica-rich network with a dominant Q4 population (77%) and minor Q3 (11%) and Q2 (12%) sites; the contact-time dependence of 1H to 29Si cross-polarization is consistent with increasing proximal-proton density from Q4 to Q2. Aging to 24 h sharpens the 29Si lineshape, while calcination progressively removes the OSDA and vicinal hydroxyls; at 750 °C, 29Si spectra indicate framework densification/rearrangement. XANES/EXAFS places bismuth predominantly as Bi3+ in an oxide-like environment with a pronounced Bi–O first shell and no detectable Bi⁰ or Bi–Br contributions. ICP–OES yields a reproducible Bi/Si atomic ratio of 1:3. Thermogravimetry shows stepwise desorption, dehydroxylation, and template removal, with thermal stability maintained to 750 °C. Nitrogen sorption confirms mesoporosity in the as-made and Soxhlet-extracted solids (the latter exhibiting the highest surface area), whereas high-temperature calcination reduces porosity. Collectively, BiSi-1 emerges as a nanocrystalline, anisotropic Bi–silicate whose connectivity, local Bi–O environment, and accessible texture are tunable by aging and post-treatments, positioning it as a promising platform for heterogeneous catalysis and environmental remediation.</abstract>
    <parentTitle language="eng">Journal of Materials Science</parentTitle>
    <identifier type="issn">0022-2461</identifier>
    <identifier type="doi">10.1007/s10853-025-11732-6</identifier>
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    <enrichment key="date_peer_review">19.11.2025</enrichment>
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    <author>Erick Paiva Cancella</author>
    <author>Guilherme de Paula Guarnieri</author>
    <author>Nader de Sousa Amadeu</author>
    <author>Martin Radtke</author>
    <author>Rodrigo Henrique Garcia</author>
    <author>Eduardo Ribeiro de Azevedo</author>
    <author>Ivana Conte Cosentino</author>
    <author>Yvonne Primerano Mascarenhas</author>
    <author>José Geraldo Nery</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>29Si NMR</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Bismuth</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Silicate</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">6 Materialchemie</collection>
    <collection role="institutes" number="">6.3 Strukturanalytik</collection>
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    <collection role="themenfelder" number="">Materialdesign</collection>
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