Recent modification, mechanisms, and performance of zinc oxide-based photocatalysts for sustainable dye degradation
The textile industry, which has crucial social and economic roles, faces sustainability challenges due to the generation of abundant wastewater contaminated by dyes. A wide range of photocatalysts has been developed to degrade dyes to reduce chemical and energy consumption in the treatment of dye-co...
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Elsevier
2024-12-01
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| Series: | Hybrid Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2773207X24001799 |
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| author | Nicole Yan Yu Lim Sin Ling Chiam C.P. Leo Chun Kiat Chang |
| author_facet | Nicole Yan Yu Lim Sin Ling Chiam C.P. Leo Chun Kiat Chang |
| author_sort | Nicole Yan Yu Lim |
| collection | DOAJ |
| description | The textile industry, which has crucial social and economic roles, faces sustainability challenges due to the generation of abundant wastewater contaminated by dyes. A wide range of photocatalysts has been developed to degrade dyes to reduce chemical and energy consumption in the treatment of dye-contaminated wastewater. This review mainly focuses on the photocatalytic mechanism and past studies of low-cost zinc oxide (ZnO) photocatalysts with various dopants to degrade dye degradation performance. Unlike previous reviews, this review delves deeply into property changes and possible mechanisms of ZnO-based photocatalysts induced by various dopants. ZnO-based photocatalysts are commonly doped with other semiconductors, metals, and non-metallic dopants. Semiconductor dopants such as titanium dioxide (TiO2), graphitic carbon nitride (g-C3N4), and iron oxide (Fe2O3) significantly modify the band gap and broaden the spectral response range of ZnO photocatalysts. Metallic dopants, including silver (Ag), copper (Cu), and cobalt (Co), introduce plasmonic effects that enhance the electrical conductivity and photocatalytic activity. Conversely, non-metallic dopants, especially carbon nanomaterials and sulfur (S), enable the adjustment of the band gap and surface properties of ZnO. Photocatalytic coating and thin films should be developed for photocatalyst reuse in future works. |
| format | Article |
| id | doaj-art-c15e9fa5a4d7482ea76af4d7f2e5e72d |
| institution | DOAJ |
| issn | 2773-207X |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Hybrid Advances |
| spelling | doaj-art-c15e9fa5a4d7482ea76af4d7f2e5e72d2025-08-20T02:50:08ZengElsevierHybrid Advances2773-207X2024-12-01710031810.1016/j.hybadv.2024.100318Recent modification, mechanisms, and performance of zinc oxide-based photocatalysts for sustainable dye degradationNicole Yan Yu Lim0Sin Ling Chiam1C.P. Leo2Chun Kiat Chang3School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, MalaysiaSchool of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, MalaysiaSchool of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Pulau Pinang, Malaysia; Corresponding author.River Engineering and Urban Drainage Research Centre (REDAC), Universiti Sains Malaysia, Engineering Campus, 14300, Nibong Tebal, Penang, MalaysiaThe textile industry, which has crucial social and economic roles, faces sustainability challenges due to the generation of abundant wastewater contaminated by dyes. A wide range of photocatalysts has been developed to degrade dyes to reduce chemical and energy consumption in the treatment of dye-contaminated wastewater. This review mainly focuses on the photocatalytic mechanism and past studies of low-cost zinc oxide (ZnO) photocatalysts with various dopants to degrade dye degradation performance. Unlike previous reviews, this review delves deeply into property changes and possible mechanisms of ZnO-based photocatalysts induced by various dopants. ZnO-based photocatalysts are commonly doped with other semiconductors, metals, and non-metallic dopants. Semiconductor dopants such as titanium dioxide (TiO2), graphitic carbon nitride (g-C3N4), and iron oxide (Fe2O3) significantly modify the band gap and broaden the spectral response range of ZnO photocatalysts. Metallic dopants, including silver (Ag), copper (Cu), and cobalt (Co), introduce plasmonic effects that enhance the electrical conductivity and photocatalytic activity. Conversely, non-metallic dopants, especially carbon nanomaterials and sulfur (S), enable the adjustment of the band gap and surface properties of ZnO. Photocatalytic coating and thin films should be developed for photocatalyst reuse in future works.http://www.sciencedirect.com/science/article/pii/S2773207X24001799ModificationPhotocatalystZnODopingDye |
| spellingShingle | Nicole Yan Yu Lim Sin Ling Chiam C.P. Leo Chun Kiat Chang Recent modification, mechanisms, and performance of zinc oxide-based photocatalysts for sustainable dye degradation Hybrid Advances Modification Photocatalyst ZnO Doping Dye |
| title | Recent modification, mechanisms, and performance of zinc oxide-based photocatalysts for sustainable dye degradation |
| title_full | Recent modification, mechanisms, and performance of zinc oxide-based photocatalysts for sustainable dye degradation |
| title_fullStr | Recent modification, mechanisms, and performance of zinc oxide-based photocatalysts for sustainable dye degradation |
| title_full_unstemmed | Recent modification, mechanisms, and performance of zinc oxide-based photocatalysts for sustainable dye degradation |
| title_short | Recent modification, mechanisms, and performance of zinc oxide-based photocatalysts for sustainable dye degradation |
| title_sort | recent modification mechanisms and performance of zinc oxide based photocatalysts for sustainable dye degradation |
| topic | Modification Photocatalyst ZnO Doping Dye |
| url | http://www.sciencedirect.com/science/article/pii/S2773207X24001799 |
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