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<p>This study investigated the photocatalytic efficacy of three photocatalysts: Nickel oxide nanowires, CdO–NiO heterojunction, and SnO<sub>2</sub>–NiO heterojunction. Nickel oxide nanowires were electrochemically deposited utilizing an anodic aluminum oxide (AAO) template as a mask. The morphology and optical characteristics of the synthesized photocatalyst samples were analyzed utilizing X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), and UV–Vis Diffuse Reflectance Spectroscopy (DRS). XRD indicated the cubic phase for Nickel oxide nanowires and the heterostructures of Cadmium oxide(CdO) and NiO, whereas the cubic and tetragonal phases were identified for nickel oxide and tin oxide, respectively. FTIR analysis validated the effective synthesis of heterogeneous structures. FESEM pictures revealed randomly oriented Nickel oxide nanowires with an average aspect ratio of approximately 15, diameters of around 50 nm, and heights of 750 nm. The photocatalytic activity of Methylene Blue (MB) dye was evaluated under visible light irradiation for three photocatalysts, yielding efficiencies of 50%, 42%, and 94% for Nickel oxide nanowires, Cadmium oxide(CdO) –NiO heterojunction, and Tin Oxide (SnO<sub>2</sub>)–NiO heterojunction, respectively.. This research highlights a high photocatalytic efficiency (94%) using SnO<sub>2</sub>–Nickel oxide heterojunction for water treatment, providing a sustainable solution to industrial dye pollution with significant environmental and commercial benefits. It introduces a novel fabrication method based on electrochemical deposition using anodic aluminum oxide (AAO) templates that allows controlled creation of nanowires and has the potential to develop scalable technology for industrial applications. The photocatalytic process operates under visible light, reducing energy requirements compared to UV-based systems.</p>

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Synthesis of NiO, CdO–NiO, and SnO2-NiO nanowires by electrochemical deposition in the anodic aluminum oxide template

  • 期刊论文

  • 发表日期：

    2026年2月23日

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  • Ali S. Hussein,
  • Abbas K. H. Albarazanchi,
  • Uday M. Nayef,
  • Mohammed W. Muayad,
  • Ali Jaafar,
  • Miklós Veres

摘要

This study investigated the photocatalytic efficacy of three photocatalysts: Nickel oxide nanowires, CdO–NiO heterojunction, and SnO2–NiO heterojunction. Nickel oxide nanowires were electrochemically deposited utilizing an anodic aluminum oxide (AAO) template as a mask. The morphology and optical characteristics of the synthesized photocatalyst samples were analyzed utilizing X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Field Emission Scanning Electron Microscopy (FESEM), and UV–Vis Diffuse Reflectance Spectroscopy (DRS). XRD indicated the cubic phase for Nickel oxide nanowires and the heterostructures of Cadmium oxide(CdO) and NiO, whereas the cubic and tetragonal phases were identified for nickel oxide and tin oxide, respectively. FTIR analysis validated the effective synthesis of heterogeneous structures. FESEM pictures revealed randomly oriented Nickel oxide nanowires with an average aspect ratio of approximately 15, diameters of around 50 nm, and heights of 750 nm. The photocatalytic activity of Methylene Blue (MB) dye was evaluated under visible light irradiation for three photocatalysts, yielding efficiencies of 50%, 42%, and 94% for Nickel oxide nanowires, Cadmium oxide(CdO) –NiO heterojunction, and Tin Oxide (SnO2)–NiO heterojunction, respectively.. This research highlights a high photocatalytic efficiency (94%) using SnO2–Nickel oxide heterojunction for water treatment, providing a sustainable solution to industrial dye pollution with significant environmental and commercial benefits. It introduces a novel fabrication method based on electrochemical deposition using anodic aluminum oxide (AAO) templates that allows controlled creation of nanowires and has the potential to develop scalable technology for industrial applications. The photocatalytic process operates under visible light, reducing energy requirements compared to UV-based systems.