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<p>The CuCo<sub>2</sub>O<sub>4</sub>–CuO nanocomposite was synthesized hydrothermally at 400°C and characterized by X-ray diffraction (XRD), Energy-Dispersive X-ray Spectroscopy (EDX), and optical analyses. XRD confirmed cubic CuCo<sub>2</sub>O<sub>4</sub> and CuO phases (~ 70 and 30&#xa0;wt%). The material exhibits a uniform nonporous morphology and strong visible light absorption. Flat band potentials were determined as 0.29 <i>V</i><sub>SCE</sub> (CuCo<sub>2</sub>O<sub>4</sub>) and −&#xa0;0.18 V<sub>SCE</sub> (CuO), enabling electron transfer between their conduction bands. The nanocomposite achieved 80% Rhodamine B degradation under visible light in 120–180&#xa0;min and 95% under UV irradiation (<i>k</i><sub>app</sub> = 1.47 × 10<sup>–2</sup>&#xa0;min<sup>−1</sup>). These results highlight its efficient photocatalytic performance under both visible and UV light.</p> Graphical abstract <p></p>

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Design and characterization of CuCo2O4–CuO nanostructures for enhanced photocatalytic treatment of Rhodamine B in wastewater

  • 期刊论文

  • 发表日期：

    2026年3月19日

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  • S. Habi Ben Hariz,
  • S. Mokhtari,
  • H. Lahmar,
  • S. Omeiri,
  • S. Douafer,
  • F. Ait Merzeg,
  • M. Benamira,
  • M. Trari

摘要

The CuCo2O4–CuO nanocomposite was synthesized hydrothermally at 400°C and characterized by X-ray diffraction (XRD), Energy-Dispersive X-ray Spectroscopy (EDX), and optical analyses. XRD confirmed cubic CuCo2O4 and CuO phases (~ 70 and 30 wt%). The material exhibits a uniform nonporous morphology and strong visible light absorption. Flat band potentials were determined as 0.29 VSCE (CuCo2O4) and − 0.18 VSCE (CuO), enabling electron transfer between their conduction bands. The nanocomposite achieved 80% Rhodamine B degradation under visible light in 120–180 min and 95% under UV irradiation (kapp = 1.47 × 10–2 min−1). These results highlight its efficient photocatalytic performance under both visible and UV light.

Graphical abstract