Fabrication of Silica‐Supported Al‐Doped ZnO and Its Use in the Elimination of the Toxic Organic Ingredients from Industrial Effluents
Abstract Herein, an easy co‐precipitation method was adopted to fabricate Al‐doped ZnO nanoflakes as a photocatalyst to remove noxious organic dye from industrial waste. The silica (SiO2) additive, owing to its network structure and excessive hydroxyl groups (Si‐OH), has a great potential to capture dye molecules in its porous network. Application studies have shown that the Al‐doped ZnO/SiO2 nanohybrid is more suitable for practical application because it eliminates almost 95 % of methylene blue (MB) dye after 120 minutes of exposure to solar light irradiation. The exceptional photodegradation efficiency of the Al‐doped ZnO/SiO2 nanohybrid can be accredited to its narrower optical band gap, distinctive texture, hybrid composition, and good dye holding ability. The Al‐doped ZnO nanoflakes exhibited a superior photocurrent response that was 4.60 times more than the bare ZnO response. Furthermore, EIS and Mott‐Schottky studies reveal that the Al‐doped ZnO catalyst facilitates the effective charge separation/transfer process and impedes electron‐hole pair recombination, resulting in enhanced photocatalytic activity ..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:6 |
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| Enthalten in: |
ChemistrySelect - 6(2021), 39, Seite 10501-10513 |
| Beteiligte Personen: |
Shahid, Muhammad [VerfasserIn] |
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| Anmerkungen: |
© 2021 Wiley‐VCH GmbH |
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| Umfang: |
13 |
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| doi: |
10.1002/slct.202102291 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a Abstract Herein, an easy co‐precipitation method was adopted to fabricate Al‐doped ZnO nanoflakes as a photocatalyst to remove noxious organic dye from industrial waste. The silica (SiO2) additive, owing to its network structure and excessive hydroxyl groups (Si‐OH), has a great potential to capture dye molecules in its porous network. Application studies have shown that the Al‐doped ZnO/SiO2 nanohybrid is more suitable for practical application because it eliminates almost 95 % of methylene blue (MB) dye after 120 minutes of exposure to solar light irradiation. The exceptional photodegradation efficiency of the Al‐doped ZnO/SiO2 nanohybrid can be accredited to its narrower optical band gap, distinctive texture, hybrid composition, and good dye holding ability. The Al‐doped ZnO nanoflakes exhibited a superior photocurrent response that was 4.60 times more than the bare ZnO response. Furthermore, EIS and Mott‐Schottky studies reveal that the Al‐doped ZnO catalyst facilitates the effective charge separation/transfer process and impedes electron‐hole pair recombination, resulting in enhanced photocatalytic activity . | ||
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