Photoeletrocatalytic activity of an n-ZnO/p-Cu2O/n-TNA ternary heterojunction electrode for tetracycline degradation
Copyright © 2013 Elsevier B.V. All rights reserved..
In this study, a novel ternary heterojunction n-ZnO/p-Cu2O/n-TiO2 nanotube arrays (n-ZnO/p-Cu2O/n-TNA) nanophotocatalyst with a sandwich-like nanostructure was constructed and applied for the photoelectrocatalytic (PEC) degradation of typical PPCPs, tetracycline (TC). The ternary heterojunction n-ZnO/p-Cu2O/n-TNA was obtained by depositing Cu2O on the surface of TNA via sonoelectrochemical deposition (SED) and subsequently building a layer of ZnO onto the p-Cu2O/n-TNA surface through hydrothermal synthesis. After being deposited by the Cu2O, the absorption-band edge of the p-Cu2O/n-TNA was obviously red-shifted to the visible region (to 505 nm), and the band gap was reduced from its original 3.20 eV to 2.46 eV. The band gap absorption edge of the ternary n-ZnO/p-Cu2O/n-TNA is similar to that of p-Cu2O/n-TN and extends the visible spectrum absorption to 510 nm, corresponding to an Eg value of about 2.43 eV. Under illumination of visible light, the photocurrent density of the ternary heterojunction n-ZnO/p-Cu2O/n-TNA electrode at 0.5 V (vs. Ag/AgCl) was more than 106 times as high as that of the pure TNAs electrode, 3.6 times as high as that of the binary heterojunction p-Cu2O/n-TNA electrode. The degradation of TC indicated that the ternary heterojunction n-ZnO/p-Cu2O/n-TNA electrode maintained a very high photoelectrocatalytic activity and excellent stability and reliability. Such kind of ternary heterojunction electrode material has a broad application prospect not only in pollution control but also in many other fields.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2013 |
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| Erschienen: |
2013 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:262 |
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| Enthalten in: |
Journal of hazardous materials - 262(2013) vom: 15. Nov., Seite 482-8 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Li, Jinhua [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 16.12.2014 Date Revised 18.11.2013 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jhazmat.2013.09.002 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM231253389 |
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| 100 | 1 | |a Li, Jinhua |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Photoeletrocatalytic activity of an n-ZnO/p-Cu2O/n-TNA ternary heterojunction electrode for tetracycline degradation |
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| 500 | |a Date Completed 16.12.2014 | ||
| 500 | |a Date Revised 18.11.2013 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2013 Elsevier B.V. All rights reserved. | ||
| 520 | |a In this study, a novel ternary heterojunction n-ZnO/p-Cu2O/n-TiO2 nanotube arrays (n-ZnO/p-Cu2O/n-TNA) nanophotocatalyst with a sandwich-like nanostructure was constructed and applied for the photoelectrocatalytic (PEC) degradation of typical PPCPs, tetracycline (TC). The ternary heterojunction n-ZnO/p-Cu2O/n-TNA was obtained by depositing Cu2O on the surface of TNA via sonoelectrochemical deposition (SED) and subsequently building a layer of ZnO onto the p-Cu2O/n-TNA surface through hydrothermal synthesis. After being deposited by the Cu2O, the absorption-band edge of the p-Cu2O/n-TNA was obviously red-shifted to the visible region (to 505 nm), and the band gap was reduced from its original 3.20 eV to 2.46 eV. The band gap absorption edge of the ternary n-ZnO/p-Cu2O/n-TNA is similar to that of p-Cu2O/n-TN and extends the visible spectrum absorption to 510 nm, corresponding to an Eg value of about 2.43 eV. Under illumination of visible light, the photocurrent density of the ternary heterojunction n-ZnO/p-Cu2O/n-TNA electrode at 0.5 V (vs. Ag/AgCl) was more than 106 times as high as that of the pure TNAs electrode, 3.6 times as high as that of the binary heterojunction p-Cu2O/n-TNA electrode. The degradation of TC indicated that the ternary heterojunction n-ZnO/p-Cu2O/n-TNA electrode maintained a very high photoelectrocatalytic activity and excellent stability and reliability. Such kind of ternary heterojunction electrode material has a broad application prospect not only in pollution control but also in many other fields | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a CB | |
| 650 | 4 | |a Cu(2)O | |
| 650 | 4 | |a PEC | |
| 650 | 4 | |a Photoeletrocatalytic oxidation | |
| 650 | 4 | |a SED | |
| 650 | 4 | |a TC | |
| 650 | 4 | |a TNA | |
| 650 | 4 | |a Ternary heterojunction | |
| 650 | 4 | |a TiO(2) nanotube arrays | |
| 650 | 4 | |a VB | |
| 650 | 4 | |a ZnO | |
| 650 | 4 | |a conduction band | |
| 650 | 4 | |a photoelectrocatalytic | |
| 650 | 4 | |a sonoelectrochemical deposition method | |
| 650 | 4 | |a tetracycline | |
| 650 | 4 | |a valence band | |
| 650 | 7 | |a Anti-Bacterial Agents |2 NLM | |
| 650 | 7 | |a Water Pollutants, Chemical |2 NLM | |
| 650 | 7 | |a titanium dioxide |2 NLM | |
| 650 | 7 | |a 15FIX9V2JP |2 NLM | |
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| 650 | 7 | |a Titanium |2 NLM | |
| 650 | 7 | |a D1JT611TNE |2 NLM | |
| 650 | 7 | |a Tetracycline |2 NLM | |
| 650 | 7 | |a F8VB5M810T |2 NLM | |
| 650 | 7 | |a Zinc Oxide |2 NLM | |
| 650 | 7 | |a SOI2LOH54Z |2 NLM | |
| 650 | 7 | |a cuprous oxide |2 NLM | |
| 650 | 7 | |a T8BEA5064F |2 NLM | |
| 700 | 1 | |a Lv, Shubin |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Yanbiao |e verfasserin |4 aut | |
| 700 | 1 | |a Bai, Jing |e verfasserin |4 aut | |
| 700 | 1 | |a Zhou, Baoxue |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Xiaofang |e verfasserin |4 aut | |
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