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<p>A tremendous insight into photocatalytic technology is upon the creation of Metal-Organic Framework (MOF) derived catalysts and their application in various photocatalytic reactions. In the present study, five novel samples, each with their unique capabilities: pure CuO, MOF@CuO, pure CeO<sub>2</sub>, MOF@CeO<sub>2</sub>, and MOF@Ce–Cu oxides have been synthesized through a hydro/solvothermal process. The structural/textural properties, surface morphological changes, and surface oxidation states have been examined using XRD, BET surface area analysis, SEM/EDS imaging, XPS analysis, and H<sub>2</sub>-TPR analysis. XRD reveals that the samples have been found to possess an abundance of structural defects - a result of the novel synthesis protocol. Interestingly, the samples also formed mesmerizing dendrite/spongy-like morphologies with crystal sizes measured at approximately 10&#xa0;nm. However, the true set of these samples apart has a higher concentration of lower oxidation state cations (Cu<sup>+</sup>/Ce<sup>3+</sup>) strategically to balance the charge neutrality. These remarkable catalysts exhibited unique characteristic features due to their elevated levels of surface oxygen species <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10934_2025_1763_Article_IEq1.gif" Format="GIF" Height="23" Rendition="HTML" Resolution="72" Type="Linedraw" Width="99" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:\left({O}_{2}^{x-}&gt;60\%\right)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mspace width="0.222222em" /> <mfenced close=")" open="("> <msubsup> <mi>O</mi> <mrow> <mn>2</mn> </mrow> <mrow> <mi>x</mi> <mo>-</mo> </mrow> </msubsup> <mo>&gt;</mo> <mn>60</mn> <mo>%</mo> </mfenced> </mrow> </math></EquationSource> </InlineEquation> and remarkably lower band gap energies. Among the as-synthesized samples, MOF@Ce–Cu and MOF@CuO obtained the band gap energy as 2.82&#xa0;eV and 1.19&#xa0;eV respectively.</p>

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Fabrication of MOF-derived Ce–Cu nanofibers for ameliorating photo-catalytic properties

  • 期刊论文

  • 发表日期：

    2025年2月7日

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  • Hari Prasad Uppara,
  • Anushka Thimmana Goud,
  • Alaka atrey,
  • K. Diksha,
  • Jaahnavi Urs,
  • Sanjay Kumar,
  • C. T. Puttaswamy,
  • Venkata Chandra Sekhar Palla

摘要

A tremendous insight into photocatalytic technology is upon the creation of Metal-Organic Framework (MOF) derived catalysts and their application in various photocatalytic reactions. In the present study, five novel samples, each with their unique capabilities: pure CuO, MOF@CuO, pure CeO2, MOF@CeO2, and MOF@Ce–Cu oxides have been synthesized through a hydro/solvothermal process. The structural/textural properties, surface morphological changes, and surface oxidation states have been examined using XRD, BET surface area analysis, SEM/EDS imaging, XPS analysis, and H2-TPR analysis. XRD reveals that the samples have been found to possess an abundance of structural defects - a result of the novel synthesis protocol. Interestingly, the samples also formed mesmerizing dendrite/spongy-like morphologies with crystal sizes measured at approximately 10 nm. However, the true set of these samples apart has a higher concentration of lower oxidation state cations (Cu+/Ce3+) strategically to balance the charge neutrality. These remarkable catalysts exhibited unique characteristic features due to their elevated levels of surface oxygen species \(\:\left({O}_{2}^{x-}>60\%\right)\) O 2 x - > 60 % and remarkably lower band gap energies. Among the as-synthesized samples, MOF@Ce–Cu and MOF@CuO obtained the band gap energy as 2.82 eV and 1.19 eV respectively.