Effect of Fe/Sn doping on the photocatalytic performance of multi-shelled ZnO microspheres : experimental and theoretical investigations
A series of multi-shelled Fe3+/Sn4+-doped ZnO microspheres were synthesized by calcining carbon microspheres as sacrificial templates. The crystal structure, morphology and optical properties of prepared photocatalysts were investigated by X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Scanning Transmission Electron Microscopy (STEM), X-ray Photoelectron Spectroscopy (XPS), UV-Vis absorption spectroscopy (UV-Vis DRS), Photoluminescence (PL) spectroscopy and transient photocurrent techniques. FESEM and STEM images demonstrated that the samples had a multi-shelled structure and the doping elements were uniformly dispersed in the ZnO matrix. DRS and PL spectra and photocurrent measurements show that the Fe/Sn doped-ZnO samples exhibited higher visible absorption and lower recombination rates of photogenerated electron-hole (e-/h+) pairs. These advantages resulted in higher photodegradation efficiency of these catalysts towards methylene blue (MB) and ciprofloxacin (CIP). Moreover, the band structure and density of states of the un-doped ZnO and Fe/Sn-doped ZnO models with three different doping ratios were calculated based on the CASTEP code. The roles of the Fe3+/Sn4+ dopant in the ZnO matrix were found to be band gap control and electron density adjustment due to the Fe(3d) and Sn(5s, 5p) orbitals. This work has a certain reference value for constructing multi-shelled photocatalysts with doping modification and investigating the mechanism of enhanced photoactivity at the microscopic level.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2019 |
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| Erschienen: |
2019 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:48 |
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| Enthalten in: |
Dalton transactions (Cambridge, England : 2003) - 48(2019), 35 vom: 21. Sept., Seite 13260-13272 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Song, Shaojia [VerfasserIn] |
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| Links: |
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| Themen: |
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| Anmerkungen: |
Date Completed 11.09.2019 Date Revised 11.09.2019 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1039/c9dt02582k |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM300287151 |
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| 100 | 1 | |a Song, Shaojia |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Effect of Fe/Sn doping on the photocatalytic performance of multi-shelled ZnO microspheres |b experimental and theoretical investigations |
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| 500 | |a Date Completed 11.09.2019 | ||
| 500 | |a Date Revised 11.09.2019 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a A series of multi-shelled Fe3+/Sn4+-doped ZnO microspheres were synthesized by calcining carbon microspheres as sacrificial templates. The crystal structure, morphology and optical properties of prepared photocatalysts were investigated by X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), Scanning Transmission Electron Microscopy (STEM), X-ray Photoelectron Spectroscopy (XPS), UV-Vis absorption spectroscopy (UV-Vis DRS), Photoluminescence (PL) spectroscopy and transient photocurrent techniques. FESEM and STEM images demonstrated that the samples had a multi-shelled structure and the doping elements were uniformly dispersed in the ZnO matrix. DRS and PL spectra and photocurrent measurements show that the Fe/Sn doped-ZnO samples exhibited higher visible absorption and lower recombination rates of photogenerated electron-hole (e-/h+) pairs. These advantages resulted in higher photodegradation efficiency of these catalysts towards methylene blue (MB) and ciprofloxacin (CIP). Moreover, the band structure and density of states of the un-doped ZnO and Fe/Sn-doped ZnO models with three different doping ratios were calculated based on the CASTEP code. The roles of the Fe3+/Sn4+ dopant in the ZnO matrix were found to be band gap control and electron density adjustment due to the Fe(3d) and Sn(5s, 5p) orbitals. This work has a certain reference value for constructing multi-shelled photocatalysts with doping modification and investigating the mechanism of enhanced photoactivity at the microscopic level | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Wu, Kun |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Huadong |e verfasserin |4 aut | |
| 700 | 1 | |a Guo, Jia |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Linfeng |e verfasserin |4 aut | |
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