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Peer-reviewedCC BY-NC 3.0Nanoscale Advances

Novel floating ZnO/alumina foam photocatalyst: a realistic approach for sustainable dye degradation in wastewater

  • Vemoori Raju1
  • Gurupada Maity2
  • Shiva Bejugama3
  • Susanta Sinha Roy4
  • Ranjit Kumar5
5 affiliations
  1. 1Department of Mechanical Engineering, Shiv Nadar Institution of Eminence Uttar Pradesh 201314 India
  2. 2Department of Physics, School of Basic and Applied Science, Galgotias University Greater Noida 203201 India
  3. 3Advanced Metallurgy and Mechanical Testing Laboratory, NDT Corrosion Control Services Dammam Kingdom of Saudi Arabia
  4. 4Department of Physics, Shiv Nadar Institution of Eminence Uttar Pradesh 201314 India
  5. 5Department of Chemical Engineering, Shiv Nadar Institution of Eminence Uttar Pradesh 201314 India
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Abstract

In the present investigation, a highly porous pure α-Al2O3 foam (92% porosity) was fabricated using a thermo-foaming method. Later, zinc oxide (ZnO) nanorods were grown on the α-Al2O3 foam by a solvothermal method to produce ZnO nanorod-decorated alumina foam (ZnO–Al2O3). The morphologies and crystallographic orientations of pure α-Al2O3 and ZnO–Al2O3 foams were verified using Field Emission Scanning Electron Microscopy (FESEM) and X-ray diffraction (XRD), respectively. The photocatalytic degradation of methylene blue (MB) was evaluated using pristine Al2O3 foam and ZnO–Al2O3 foam under optimized conditions. ZnO–Al2O3 foam exhibited a degradation efficiency of approximately 57%, which was significantly higher than the ∼27% achieved by the pure Al2O3 foam. The synergistic interaction between ZnO's photocatalytic activity and the structural support provided by the alumina scaffold plays an important role in the degradation of the dye. The ZnO–Al2O3 foam utilizes both adsorption and photocatalytic degradation, whereas the Al2O3 foam removes dyes only through physical adsorption. The ZnO–Al2O3 foam provides an effective photocatalyst and a real-life solution for mitigating water pollution.

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Cite

BibTeXRIS
BibTeX
@article{raju2026novel,
  title = {{Novel floating ZnO/alumina foam photocatalyst: a realistic approach for sustainable dye degradation in wastewater}},
  author = {Vemoori Raju and Gurupada Maity and Shiva Bejugama and Susanta Sinha Roy and Ranjit Kumar},
  journal = {Nanoscale Advances},
  year = {2026},
  month = sep,
  doi = {10.1039/d6na00403b},
  url = {https://doi.org/10.1039/d6na00403b},
  note = {CC BY-NC 3.0},
}
RIS
TY  - JOUR
TI  - Novel floating ZnO/alumina foam photocatalyst: a realistic approach for sustainable dye degradation in wastewater
AU  - Vemoori Raju
AU  - Gurupada Maity
AU  - Shiva Bejugama
AU  - Susanta Sinha Roy
AU  - Ranjit Kumar
PY  - 2026
DA  - 2026/09/08
JO  - Nanoscale Advances
DO  - 10.1039/d6na00403b
UR  - https://doi.org/10.1039/d6na00403b
AB  - In the present investigation, a highly porous pure α-Al2O3 foam (92% porosity) was fabricated using a thermo-foaming method. Later, zinc oxide (ZnO) nanorods were grown on the α-Al2O3 foam by a solvothermal method to produce ZnO nanorod-decorated alumina foam (ZnO–Al2O3). The morphologies and crystallographic orientations of pure α-Al2O3 and ZnO–Al2O3 foams were verified using Field Emission Scanning Electron Microscopy (FESEM) and X-ray diffraction (XRD), respectively. The photocatalytic degradation of methylene blue (MB) was evaluated using pristine Al2O3 foam and ZnO–Al2O3 foam under optimized conditions. ZnO–Al2O3 foam exhibited a degradation efficiency of approximately 57%, which was significantly higher than the ∼27% achieved by the pure Al2O3 foam. The synergistic interaction between ZnO's photocatalytic activity and the structural support provided by the alumina scaffold plays an important role in the degradation of the dye. The ZnO–Al2O3 foam utilizes both adsorption and photocatalytic degradation, whereas the Al2O3 foam removes dyes only through physical adsorption. The ZnO–Al2O3 foam provides an effective photocatalyst and a real-life solution for mitigating water pollution.
SN  - 2516-0230
ER  -