Strong thickness dependence in thin film photocatalytic heterojunctions: the ZnO–Bi<sub>2</sub>O<sub>3</sub> case study

Bernal-Díaz, Alberto; Hernández-Gordillo, Agileo; Alonso, Juan Carlos; Rodil, Sandra E.; Bizarro, Monserrat

doi:10.1039/d4dt00697f

Cited by 1 publication

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“…Where α, h ν, E g and A represent the absorption coefficient, photon energy, band gap, and constant, respectively. For ZnO and CuI, n = 2 was chosen due to their direct transition semiconductor properties. , The band gap value was estimated from the Tauc plot of (α h ν) n versus photon energy ( h ν), as illustrated in Figure S3b. According to the tangent intercept, the band gap values of ZnO/Cu foam, CuI/Cu foam, CIZ-1, CIZ-2 and CIZ-3 were estimated to be 2.80, 2.68, 2.96, 2.84, and 2.90 eV.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of H₂O₂ to Self-Catalyzed Generation of ^•OH over ZnO/CuI/Cu Foam Electrode for the Self-Fenton Cleaning of Wastewater

Wang,

Wu,

Wang

et al. 2024

Inorg. Chem.

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A novel ZnO/CuI/Cu foam electrode was constructed, which demonstrated excellent photoelectrocatalytic activity for the self-Fenton degradation of tetracycline in water. The H 2 O 2 yield was 405.0 μmol L −1 over ZnO/CuI/Cu foam (CIZ-3) under light irradiation (100 mW cm −2 ) for 5 h at −1.23 V (vs NHE), which was 1.7 times higher than that of ZnO/Cu foam and 1.6 times higher than that of CuI/Cu foam, respectively. The 99.0% of tetracycline was degraded by CIZ-3 due to its efficient yield of H 2 O 2 to self-catalyzed generation of • OH. The results of the open-circuit potential between CuI and ZnO displayed that the electrons from the conduction band of CuI flowed to ZnO and the holes from the valence band of ZnO migrated to CuI. As a result, the photogenerated electron−hole pairs of ZnO/CuI were efficiently separated, which greatly promoted the photoelectrocatalytic activity of ZnO/CuI/foam. The toxicity of the aqueous tetracycline solution was significantly reduced by observing the growth of Escherichia coli in the treated wastewater.

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Section: Resultsmentioning

confidence: 99%

Synthesis of H₂O₂ to Self-Catalyzed Generation of ^•OH over ZnO/CuI/Cu Foam Electrode for the Self-Fenton Cleaning of Wastewater

Wang,

Wu,

Wang

et al. 2024

Inorg. Chem.

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Strong thickness dependence in thin film photocatalytic heterojunctions: the ZnO–Bi₂O₃ case study

Abstract: In thin film heterojunctions, the photocatalytic activity is strongly influenced by the deposition order and the thickness of each layer as different reactive species can be formed. Under certain conditions a synergistic effect can be achieved even under visible light.

Cited by 1 publication

References 45 publications

Synthesis of H₂O₂ to Self-Catalyzed Generation of ^•OH over ZnO/CuI/Cu Foam Electrode for the Self-Fenton Cleaning of Wastewater

Synthesis of H₂O₂ to Self-Catalyzed Generation of ^•OH over ZnO/CuI/Cu Foam Electrode for the Self-Fenton Cleaning of Wastewater

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Strong thickness dependence in thin film photocatalytic heterojunctions: the ZnO–Bi2O3 case study

Abstract: In thin film heterojunctions, the photocatalytic activity is strongly influenced by the deposition order and the thickness of each layer as different reactive species can be formed. Under certain conditions a synergistic effect can be achieved even under visible light.

Cited by 1 publication

References 45 publications

Synthesis of H2O2 to Self-Catalyzed Generation of •OH over ZnO/CuI/Cu Foam Electrode for the Self-Fenton Cleaning of Wastewater

Synthesis of H2O2 to Self-Catalyzed Generation of •OH over ZnO/CuI/Cu Foam Electrode for the Self-Fenton Cleaning of Wastewater

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Strong thickness dependence in thin film photocatalytic heterojunctions: the ZnO–Bi₂O₃ case study

Synthesis of H₂O₂ to Self-Catalyzed Generation of ^•OH over ZnO/CuI/Cu Foam Electrode for the Self-Fenton Cleaning of Wastewater

Synthesis of H₂O₂ to Self-Catalyzed Generation of ^•OH over ZnO/CuI/Cu Foam Electrode for the Self-Fenton Cleaning of Wastewater