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Controlled synthesis of Bi2O3/BiOBr/Zn2GeO4 heterojunction photocatalysts with enhanced photocatalytic activity

BiOBr/ZnGeO heterojunctions decorated by BiO quantum dots (s; named as BiO/BiOBr/ZnGeO hereafter) with intriguing micro/nanostructures have been constructed via a two‐step hydrothermal route. The compositions, phases, and morphologies of BiO/BiOBr/ZnGeO were investigated in detail. The light absorpt... Full description

Journal Title: Journal of the American Ceramic Society December 2018, Vol.101(12), pp.5858-5869
Main Author: Zhang, Qiang
Other Authors: Pang, Kuan , Xu, Yan
Format: Electronic Article Electronic Article
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ID: ISSN: 0002-7820 ; E-ISSN: 1551-2916 ; DOI: 10.1111/jace.15887
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recordid: wj10.1111/jace.15887
title: Controlled synthesis of Bi2O3/BiOBr/Zn2GeO4 heterojunction photocatalysts with enhanced photocatalytic activity
format: Article
creator:
  • Zhang, Qiang
  • Pang, Kuan
  • Xu, Yan
subjects:
  • Bismuth Oxide
  • Hydrothermal
  • Morphology
  • Photocatalysis
  • Zn 2 Geo 4
ispartof: Journal of the American Ceramic Society, December 2018, Vol.101(12), pp.5858-5869
description: BiOBr/ZnGeO heterojunctions decorated by BiO quantum dots (s; named as BiO/BiOBr/ZnGeO hereafter) with intriguing micro/nanostructures have been constructed via a two‐step hydrothermal route. The compositions, phases, and morphologies of BiO/BiOBr/ZnGeO were investigated in detail. The light absorption ability, photocurrent responses, and photocatalytic degradation of methylene blue (MB) experiments were performed to evaluate the photocatalytic activity of the micro/nanoheterostructured BiO/BiOBr/ZnGeO, which present a degradation efficiency of 88% after 240 minutes under light irradiation (λ = 300‐600 nm) over 100 mg BiO/BiOBr/ZnGeO in a 100 mL, 4 mg/L MB solution. The photocatalytic performance could be retained for at least four runs, indicating its excellent reusability for the degradation of MB in aqueous solution. It is found that the photodegradation of MB over BiO/BiOBr/ZnGeO is mainly ascribed to a hole oxidation mechanism in combination with a superoxide oxidation process. The high photocatalytic performance of BiO/BiOBr/ZnGeO upon light irradiation can be attributed to the effective charge separation and smoothly transferring of the photogenerated charge carriers throughout the heterojunction. The feasible strategy of preparing BiO/BiOBr/ZnGeO ternary composites is also of benefit to fabricate other efficient heterojunction catalysts with specific morphologies and properties. We reported a controlled synthesis of BiO/BiOBr/ZnGeO heterojunction exhibiting improved photocatalytic activity towards methylene blue dye degradation.
language:
source:
identifier: ISSN: 0002-7820 ; E-ISSN: 1551-2916 ; DOI: 10.1111/jace.15887
fulltext: fulltext
issn:
  • 0002-7820
  • 00027820
  • 1551-2916
  • 15512916
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titleControlled synthesis of Bi2O3/BiOBr/Zn2GeO4 heterojunction photocatalysts with enhanced photocatalytic activity
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subjectBismuth Oxide ; Hydrothermal ; Morphology ; Photocatalysis ; Zn 2 Geo 4
descriptionBiOBr/ZnGeO heterojunctions decorated by BiO quantum dots (s; named as BiO/BiOBr/ZnGeO hereafter) with intriguing micro/nanostructures have been constructed via a two‐step hydrothermal route. The compositions, phases, and morphologies of BiO/BiOBr/ZnGeO were investigated in detail. The light absorption ability, photocurrent responses, and photocatalytic degradation of methylene blue (MB) experiments were performed to evaluate the photocatalytic activity of the micro/nanoheterostructured BiO/BiOBr/ZnGeO, which present a degradation efficiency of 88% after 240 minutes under light irradiation (λ = 300‐600 nm) over 100 mg BiO/BiOBr/ZnGeO in a 100 mL, 4 mg/L MB solution. The photocatalytic performance could be retained for at least four runs, indicating its excellent reusability for the degradation of MB in aqueous solution. It is found that the photodegradation of MB over BiO/BiOBr/ZnGeO is mainly ascribed to a hole oxidation mechanism in combination with a superoxide oxidation process. The high photocatalytic performance of BiO/BiOBr/ZnGeO upon light irradiation can be attributed to the effective charge separation and smoothly transferring of the photogenerated charge carriers throughout the heterojunction. The feasible strategy of preparing BiO/BiOBr/ZnGeO ternary composites is also of benefit to fabricate other efficient heterojunction catalysts with specific morphologies and properties. We reported a controlled synthesis of BiO/BiOBr/ZnGeO heterojunction exhibiting improved photocatalytic activity towards methylene blue dye degradation.
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descriptionBiOBr/ZnGeO heterojunctions decorated by BiO quantum dots (s; named as BiO/BiOBr/ZnGeO hereafter) with intriguing micro/nanostructures have been constructed via a two‐step hydrothermal route. The compositions, phases, and morphologies of BiO/BiOBr/ZnGeO were investigated in detail. The light absorption ability, photocurrent responses, and photocatalytic degradation of methylene blue (MB) experiments were performed to evaluate the photocatalytic activity of the micro/nanoheterostructured BiO/BiOBr/ZnGeO, which present a degradation efficiency of 88% after 240 minutes under light irradiation (λ = 300‐600 nm) over 100 mg BiO/BiOBr/ZnGeO in a 100 mL, 4 mg/L MB solution. The photocatalytic performance could be retained for at least four runs, indicating its excellent reusability for the degradation of MB in aqueous solution. It is found that the photodegradation of MB over BiO/BiOBr/ZnGeO is mainly ascribed to a hole oxidation mechanism in combination with a superoxide oxidation process. The high photocatalytic performance of BiO/BiOBr/ZnGeO upon light irradiation can be attributed to the effective charge separation and smoothly transferring of the photogenerated charge carriers throughout the heterojunction. The feasible strategy of preparing BiO/BiOBr/ZnGeO ternary composites is also of benefit to fabricate other efficient heterojunction catalysts with specific morphologies and properties. We reported a controlled synthesis of BiO/BiOBr/ZnGeO heterojunction exhibiting improved photocatalytic activity towards methylene blue dye degradation.
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abstractBiOBr/ZnGeO heterojunctions decorated by BiO quantum dots (s; named as BiO/BiOBr/ZnGeO hereafter) with intriguing micro/nanostructures have been constructed via a two‐step hydrothermal route. The compositions, phases, and morphologies of BiO/BiOBr/ZnGeO were investigated in detail. The light absorption ability, photocurrent responses, and photocatalytic degradation of methylene blue (MB) experiments were performed to evaluate the photocatalytic activity of the micro/nanoheterostructured BiO/BiOBr/ZnGeO, which present a degradation efficiency of 88% after 240 minutes under light irradiation (λ = 300‐600 nm) over 100 mg BiO/BiOBr/ZnGeO in a 100 mL, 4 mg/L MB solution. The photocatalytic performance could be retained for at least four runs, indicating its excellent reusability for the degradation of MB in aqueous solution. It is found that the photodegradation of MB over BiO/BiOBr/ZnGeO is mainly ascribed to a hole oxidation mechanism in combination with a superoxide oxidation process. The high photocatalytic performance of BiO/BiOBr/ZnGeO upon light irradiation can be attributed to the effective charge separation and smoothly transferring of the photogenerated charge carriers throughout the heterojunction. The feasible strategy of preparing BiO/BiOBr/ZnGeO ternary composites is also of benefit to fabricate other efficient heterojunction catalysts with specific morphologies and properties. We reported a controlled synthesis of BiO/BiOBr/ZnGeO heterojunction exhibiting improved photocatalytic activity towards methylene blue dye degradation.
doi10.1111/jace.15887
pages5858-5869
orcidid0000-0002-7608-7013
date2018-12