Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatings
Titanium dioxide (TiO2) thin films exhibit encouraging photocatalytic activity for the degradation of dyes, organic compounds, and biological contaminants. These thin films were obtained using the sol–gel method to prevent issues related to the leaching and separation of TiO2 powder. Therefore, this...
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Elsevier
2025-01-01
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| author | Mona Khalaghi Masoud Atapour Mohamad Mohsen Momeni Mohammad Reza Karampoor |
| author_facet | Mona Khalaghi Masoud Atapour Mohamad Mohsen Momeni Mohammad Reza Karampoor |
| author_sort | Mona Khalaghi |
| collection | DOAJ |
| description | Titanium dioxide (TiO2) thin films exhibit encouraging photocatalytic activity for the degradation of dyes, organic compounds, and biological contaminants. These thin films were obtained using the sol–gel method to prevent issues related to the leaching and separation of TiO2 powder. Therefore, this technique could be effective for treating large volumes of wastewater generated by the textile and refining finishing industries. Typically, these wastewater streams contain heavy metals, which can hinder the process of photodegradation. Transition metals often participate in this procedure, allowing them to adsorb onto the surface of the photocatalyst and modify its photocatalytic performance. Consequently, this study investigated the effects of doping TiO2 with copper, nickel, and zinc. The impact of doping TiO2 with Cu, Ni, and Zn was examined by considering the morphology, visible light response, corrosion and photocorrosion performance, and photocatalytic activity. Grazing incidence X-ray diffraction (GIXRD) results show that dopants are uniformly distributed in the form of oxide states. Morphology and wettability tests indicate that the addition of dopants into TiO2 thin films can develop compact structures with a lower crystallite size, improved surface area, and hydrophilic surfaces. The Cu, Ni, and Zn doping coatings show increased visible light absorption, with the band gap decreasing from 3.05 to 2.3, 2.8, and 2.85 eV, respectively. The maximum photocurrent density is observed for a Zn-doped TiO2 photoelectrode, which facilitates greater light energy utilization for photocatalytic performance. Corrosion measurements under dark and light conditions for doped TiO2 coatings exhibited contrasting activities, suggesting high electrical conductivity under light illumination. |
| format | Article |
| id | doaj-art-aee86accd9f2462cbc4c89285efa6b73 |
| institution | Kabale University |
| issn | 2211-7156 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
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| series | Results in Chemistry |
| spelling | doaj-art-aee86accd9f2462cbc4c89285efa6b732025-01-29T05:01:02ZengElsevierResults in Chemistry2211-71562025-01-0113102032Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatingsMona Khalaghi0Masoud Atapour1Mohamad Mohsen Momeni2Mohammad Reza Karampoor3Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, IranDepartment of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, IranDepartment of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, IranDepartment of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Corresponding author.Titanium dioxide (TiO2) thin films exhibit encouraging photocatalytic activity for the degradation of dyes, organic compounds, and biological contaminants. These thin films were obtained using the sol–gel method to prevent issues related to the leaching and separation of TiO2 powder. Therefore, this technique could be effective for treating large volumes of wastewater generated by the textile and refining finishing industries. Typically, these wastewater streams contain heavy metals, which can hinder the process of photodegradation. Transition metals often participate in this procedure, allowing them to adsorb onto the surface of the photocatalyst and modify its photocatalytic performance. Consequently, this study investigated the effects of doping TiO2 with copper, nickel, and zinc. The impact of doping TiO2 with Cu, Ni, and Zn was examined by considering the morphology, visible light response, corrosion and photocorrosion performance, and photocatalytic activity. Grazing incidence X-ray diffraction (GIXRD) results show that dopants are uniformly distributed in the form of oxide states. Morphology and wettability tests indicate that the addition of dopants into TiO2 thin films can develop compact structures with a lower crystallite size, improved surface area, and hydrophilic surfaces. The Cu, Ni, and Zn doping coatings show increased visible light absorption, with the band gap decreasing from 3.05 to 2.3, 2.8, and 2.85 eV, respectively. The maximum photocurrent density is observed for a Zn-doped TiO2 photoelectrode, which facilitates greater light energy utilization for photocatalytic performance. Corrosion measurements under dark and light conditions for doped TiO2 coatings exhibited contrasting activities, suggesting high electrical conductivity under light illumination.http://www.sciencedirect.com/science/article/pii/S2211715625000153Metal doped TiO2Sol–gel methodWater treatmentPhotocatalysisCorrosionVisible light |
| spellingShingle | Mona Khalaghi Masoud Atapour Mohamad Mohsen Momeni Mohammad Reza Karampoor Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatings Results in Chemistry Metal doped TiO2 Sol–gel method Water treatment Photocatalysis Corrosion Visible light |
| title | Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatings |
| title_full | Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatings |
| title_fullStr | Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatings |
| title_full_unstemmed | Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatings |
| title_short | Visible light photocatalytic efficiency and corrosion resistance of Zn, Ni, and Cu-doped TiO2 coatings |
| title_sort | visible light photocatalytic efficiency and corrosion resistance of zn ni and cu doped tio2 coatings |
| topic | Metal doped TiO2 Sol–gel method Water treatment Photocatalysis Corrosion Visible light |
| url | http://www.sciencedirect.com/science/article/pii/S2211715625000153 |
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