Facile synthesis of $ ZnBi_{2} %$ O_{4} $-graphite composites as highly active visible-light photocatalyst for the mineralization of rhodamine B
Abstract Novel highly active visible-light photocatalysts in the form of zinc bismuth oxide ($ ZnBi_{2} %$ O_{4} $) and graphite hybrid composites were prepared by coupling via a co-precipitation method followed by calcination at 450 °C. The as-prepared $ ZnBi_{2} %$ O_{4} $-graphite hybrid composites were tested for the degradation of rhodamine B (RhB) solutions under visible-light irradiation. The existence of strong electronic coupling between the two components within the $ ZnBi_{2} %$ O_{4} $-graphite heterostructure suppressed the photogenerated recombination of electrons and holes to a remarkable extent. The prepared composite exhibited excellent photocatalytic activity, leading to more than 93% of RhB degradation at an initial concentration of 50mg·$ L^{-1} $ with 1.0 g catalyst per liter in 150min. The excellent visible-light photocatalytic mineralization of $ ZnBi_{2} %$ O_{4} $-1.0graphite in comparison with pristine $ ZnBi_{2} %$ O_{4} $ could be attributed to synergetic effects, charge transfer between $ ZnBi_{2} %$ O_{4} $ and graphite, and the separation efficiency of the photogenerated electrons and holes. The photo-induced h+ and the superoxide anion were the major active species responsible for the photodegradation process. The results demonstrate the feasibility of $ ZnBi_{2} %$ O_{4} $-1.0graphite as a potential heterogeneous photocatalyst for environmental remediation..
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2018 |
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| Erschienen: |
2018 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:35 |
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| Enthalten in: |
The Korean journal of chemical engineering - 35(2018), 12 vom: 19. Nov., Seite 2442-2451 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Tho, Nguyen Thi Mai [VerfasserIn] |
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| Links: |
Volltext [lizenzpflichtig] |
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| Themen: |
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| Anmerkungen: |
© Korean Institute of Chemical Engineers, Seoul, Korea 2018 |
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| doi: |
10.1007/s11814-018-0156-z |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
SPR02252245X |
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| 520 | |a Abstract Novel highly active visible-light photocatalysts in the form of zinc bismuth oxide ($ ZnBi_{2} %$ O_{4} $) and graphite hybrid composites were prepared by coupling via a co-precipitation method followed by calcination at 450 °C. The as-prepared $ ZnBi_{2} %$ O_{4} $-graphite hybrid composites were tested for the degradation of rhodamine B (RhB) solutions under visible-light irradiation. The existence of strong electronic coupling between the two components within the $ ZnBi_{2} %$ O_{4} $-graphite heterostructure suppressed the photogenerated recombination of electrons and holes to a remarkable extent. The prepared composite exhibited excellent photocatalytic activity, leading to more than 93% of RhB degradation at an initial concentration of 50mg·$ L^{-1} $ with 1.0 g catalyst per liter in 150min. The excellent visible-light photocatalytic mineralization of $ ZnBi_{2} %$ O_{4} $-1.0graphite in comparison with pristine $ ZnBi_{2} %$ O_{4} $ could be attributed to synergetic effects, charge transfer between $ ZnBi_{2} %$ O_{4} $ and graphite, and the separation efficiency of the photogenerated electrons and holes. The photo-induced h+ and the superoxide anion were the major active species responsible for the photodegradation process. The results demonstrate the feasibility of $ ZnBi_{2} %$ O_{4} $-1.0graphite as a potential heterogeneous photocatalyst for environmental remediation. | ||
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| 650 | 4 | |a Mineralization |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Huy, Bui The |4 aut | |
| 700 | 1 | |a Khanh, Dang Nguyen Nha |4 aut | |
| 700 | 1 | |a Ha, Ho Nguyen Nhat |4 aut | |
| 700 | 1 | |a Huy, Vu Quang |4 aut | |
| 700 | 1 | |a Vy, Ngo Thi Tuong |4 aut | |
| 700 | 1 | |a Huy, Do Manh |4 aut | |
| 700 | 1 | |a Dat, Duong Phuoc |4 aut | |
| 700 | 1 | |a Phuong, Nguyen Thi Kim |4 aut | |
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