Scholarlink

<p>In this work, pristine CuO, NiO, and CdO nanoparticles (NPs) and their binary (CuO–NiO, CuO–CdO, NiO–CdO) and ternary (CuO–NiO–CdO) nanocomposites (NCs) were synthesized by a co-precipitation method and investigated for structural, morphological, chemical, optical, and photocatalytic properties. X-ray diffraction confirmed monoclinic CuO and cubic NiO, and CdO phases. A significant reduction in crystallite size was observed, with the ternary NCs exhibiting the smallest size of 22.18 nm compared to pristine oxides. Similarly, optical analysis showed a narrowing of the bandgap (<i>E</i><sub>g</sub>), where the ternary NCs displayed the lowest <i>E</i><sub>g</sub> of 1.21 eV, favoring enhanced visible-light absorption. SEM analysis revealed uniform particle distribution with moderate agglomeration, while FTIR, EDX, and XPS confirmed the presence of Cu–O, Ni–O, and Cd–O bonds and the corresponding elemental composition and chemical states. Elemental mapping further demonstrated homogeneous mixing within the NCs. The photocatalytic performance was evaluated against methylene blue (MB) dye under visible light. Pristine NPs showed limited activity due to rapid charge recombination, whereas the NCs exhibited markedly enhanced degradation. The ternary NCs demonstrated the highest photocatalytic efficiency, achieving 95.57% degradation of MB with a rate constant of <i>k</i><sub>obs</sub> = 0.02378 ± 1.55 × 10<sup>−3 </sup>min<sup>−1</sup>. Radical trapping experiments confirmed hydroxyl radicals (<sup>•</sup>OH) as the dominant reactive species. The recycling study demonstrated remarkable cycle stability for MB dye degradation, implying great potential for environmental remediation, notably in wastewater treatment.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Investigation of crystalline, morphological and optical properties of ternary CuO–NiO–CdO nanocomposite for photocatalytic applications

  • 期刊论文

  • 发表日期：

    2025年10月24日

查看全文
  • Elumalai Arulkumar,
  • Gopinath Dhamodaran,
  • Sethuramachandran Thanikaikarasan,
  • Ramesh Krishnan,
  • S. AlFaify,
  • Mohd. Shkir,
  • Atif Mossad Ali

摘要

In this work, pristine CuO, NiO, and CdO nanoparticles (NPs) and their binary (CuO–NiO, CuO–CdO, NiO–CdO) and ternary (CuO–NiO–CdO) nanocomposites (NCs) were synthesized by a co-precipitation method and investigated for structural, morphological, chemical, optical, and photocatalytic properties. X-ray diffraction confirmed monoclinic CuO and cubic NiO, and CdO phases. A significant reduction in crystallite size was observed, with the ternary NCs exhibiting the smallest size of 22.18 nm compared to pristine oxides. Similarly, optical analysis showed a narrowing of the bandgap (Eg), where the ternary NCs displayed the lowest Eg of 1.21 eV, favoring enhanced visible-light absorption. SEM analysis revealed uniform particle distribution with moderate agglomeration, while FTIR, EDX, and XPS confirmed the presence of Cu–O, Ni–O, and Cd–O bonds and the corresponding elemental composition and chemical states. Elemental mapping further demonstrated homogeneous mixing within the NCs. The photocatalytic performance was evaluated against methylene blue (MB) dye under visible light. Pristine NPs showed limited activity due to rapid charge recombination, whereas the NCs exhibited markedly enhanced degradation. The ternary NCs demonstrated the highest photocatalytic efficiency, achieving 95.57% degradation of MB with a rate constant of kobs = 0.02378 ± 1.55 × 10−3 min−1. Radical trapping experiments confirmed hydroxyl radicals (•OH) as the dominant reactive species. The recycling study demonstrated remarkable cycle stability for MB dye degradation, implying great potential for environmental remediation, notably in wastewater treatment.

Graphical Abstract