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Synergistic Effect of N Doping and Ag Loading on Photocatalytic Degradation Performance of Rhodamine B by ZnO Nanoarrays.

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Title: Synergistic Effect of N Doping and Ag Loading on Photocatalytic Degradation Performance of Rhodamine B by ZnO Nanoarrays.
Authors: Liu, Congwen1 (AUTHOR), Deng, Wei1,2 (AUTHOR), Zhang, Hai1 (AUTHOR), Han, Xiaochen1,2 (AUTHOR), Ran, Qiang1 (AUTHOR), Yu, Wenxuan1 (AUTHOR), Xu, Xiaoling1,2 (AUTHOR) bihan_2001@163.com, Zhou, Zuowan1,2 (AUTHOR)
Source: Nanomaterials (2079-4991). Apr2026, Vol. 16 Issue 7, p438. 17p.
Subjects: Photocatalysts, Doping agents (Chemistry), Photodegradation, Light absorption, Rhodamine B, Water purification
Abstract: Photocatalytic degradation is a highly efficient, stable and promising technology for water treatment. Developing high-performance photocatalysts is crucial for removing aquatic contaminants. However, traditional zinc oxide (ZnO) photocatalysts are severely restricted by intrinsic drawbacks, such as a wide band gap, fast recombination of photogenerated carriers, and high photocorrosion tendency. Conventional powder catalysts also suffer from difficult recovery and serious secondary pollution. Therefore, developing simple strategies to fabricate high-performance, reusable, and stable ZnO-based photocatalysts is of great scientific and practical importance. In this work, silver-loaded nitrogen-doped ZnO nanoarrays (AgY@NX-ZnO NAs, where X and Y represent the urea and AgNO3 concentrations, respectively) were synthesized on 304 stainless steel sheets (SSS) using a two-step hydrothermal method combined with photoreduction at room temperature. The samples were characterized by XRD, FESEM, XPS, and UV-Vis DRS, and the catalytic mechanism was studied through active species trapping and EPR. Nitrogen doping and Ag loading exhibited a strong synergistic effect, narrowing the band gap, enhancing visible-light absorption, and promoting the separation of photogenerated carriers. The optimal sample (Ag1.5@N4-ZnO NAs) degraded 93.2% of Rhodamine B (RhB) within 180 min, with a reaction rate constant 2.65 times higher than pure ZnO. The main active species were ·O2− and ·OH. This work provides a feasible route to fabricate recyclable and stable stainless steel-based ZnO nanoarray photocatalysts for efficient water purification. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Synergistic Effect of N Doping and Ag Loading on Photocatalytic Degradation Performance of Rhodamine B by ZnO Nanoarrays.
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  Data: <searchLink fieldCode="AR" term="%22Liu%2C+Congwen%22">Liu, Congwen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deng%2C+Wei%22">Deng, Wei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Hai%22">Zhang, Hai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Han%2C+Xiaochen%22">Han, Xiaochen</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ran%2C+Qiang%22">Ran, Qiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yu%2C+Wenxuan%22">Yu, Wenxuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Xiaoling%22">Xu, Xiaoling</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> bihan_2001@163.com</i><br /><searchLink fieldCode="AR" term="%22Zhou%2C+Zuowan%22">Zhou, Zuowan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Apr2026, Vol. 16 Issue 7, p438. 17p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Photocatalysts%22">Photocatalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Doping+agents+%28Chemistry%29%22">Doping agents (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Photodegradation%22">Photodegradation</searchLink><br /><searchLink fieldCode="DE" term="%22Light+absorption%22">Light absorption</searchLink><br /><searchLink fieldCode="DE" term="%22Rhodamine+B%22">Rhodamine B</searchLink><br /><searchLink fieldCode="DE" term="%22Water+purification%22">Water purification</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Photocatalytic degradation is a highly efficient, stable and promising technology for water treatment. Developing high-performance photocatalysts is crucial for removing aquatic contaminants. However, traditional zinc oxide (ZnO) photocatalysts are severely restricted by intrinsic drawbacks, such as a wide band gap, fast recombination of photogenerated carriers, and high photocorrosion tendency. Conventional powder catalysts also suffer from difficult recovery and serious secondary pollution. Therefore, developing simple strategies to fabricate high-performance, reusable, and stable ZnO-based photocatalysts is of great scientific and practical importance. In this work, silver-loaded nitrogen-doped ZnO nanoarrays (AgY@NX-ZnO NAs, where X and Y represent the urea and AgNO3 concentrations, respectively) were synthesized on 304 stainless steel sheets (SSS) using a two-step hydrothermal method combined with photoreduction at room temperature. The samples were characterized by XRD, FESEM, XPS, and UV-Vis DRS, and the catalytic mechanism was studied through active species trapping and EPR. Nitrogen doping and Ag loading exhibited a strong synergistic effect, narrowing the band gap, enhancing visible-light absorption, and promoting the separation of photogenerated carriers. The optimal sample (Ag1.5@N4-ZnO NAs) degraded 93.2% of Rhodamine B (RhB) within 180 min, with a reaction rate constant 2.65 times higher than pure ZnO. The main active species were ·O2− and ·OH. This work provides a feasible route to fabricate recyclable and stable stainless steel-based ZnO nanoarray photocatalysts for efficient water purification. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano16070438
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 17
        StartPage: 438
    Subjects:
      – SubjectFull: Photocatalysts
        Type: general
      – SubjectFull: Doping agents (Chemistry)
        Type: general
      – SubjectFull: Photodegradation
        Type: general
      – SubjectFull: Light absorption
        Type: general
      – SubjectFull: Rhodamine B
        Type: general
      – SubjectFull: Water purification
        Type: general
    Titles:
      – TitleFull: Synergistic Effect of N Doping and Ag Loading on Photocatalytic Degradation Performance of Rhodamine B by ZnO Nanoarrays.
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            NameFull: Liu, Congwen
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            NameFull: Deng, Wei
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            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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