The {0 1 0} and {1 1 0} facets of BiVO4 were selectively modified by Cu and g-C3N4 to enhance its visible light photocatalytic performance

Hu, Yuanman; Gao, Yan; Liu, Fengjiao; Tian, Yaxi; Wang, Qiongqiong; Zeng, Danni; Shen, Ting; Song, Jun Tae; Yuan, Haibin

doi:10.1016/j.seppur.2023.124471

Cited by 12 publications

(5 citation statements)

References 57 publications

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“…In the Bi 4f spectrum (Fig. 4d), BiVO 4 shows two diffraction peaks at 159.20 and 164.48 eV, which indicates that Bi elements exist in the Bi 3+ state in BiVO 4 (Hu et al 2023). In Fig.…”

Section: Characterization Resultsmentioning

confidence: 94%

A novel visible-light-driven Z-scheme C3N5/BiVO4 heterostructure with enhanced photocatalytic degradation performance

Ma,

Wang,

Wang

et al. 2024

Environ Sci Pollut Res

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As a visible-light response semiconductor materials, bismuth vanadate (BiVO 4 ) is extensively applied in photodegradation organic dyes eld. In this study, we synthesized C 3 N 5 nanosheets and coupled with decahedral BiVO 4 to construct a Z-scheme C 3 N 5 /BiVO 4 heterostructures with close interface contact. By introducing C 3 N 5 into BiVO 4 , the built Z-scheme transfer pathway provides silky channel for charge carrier migration between different moieties and enables photoexcited electrons and holes accumulated on the surface of BiVO 4 and C 3 N 5 . The accelerated separation of charge carriers ensures C 3 N 5 /BiVO 4 heterostructures with a powerful oxidation capacity compared with pure BiVO 4 . Due to the synergistic effect in Z-scheme heterostructure, the C 3 N 5 /BiVO 4 demonstrated an improved photodegradation ability of rhodamine B (RhB) and methylene blue (MB) that of bare BiVO 4 .

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“…In the Bi 4f spectrum (Fig. 4d), BiVO 4 shows two diffraction peaks at 159.20 and 164.48 eV, which indicates that Bi elements exist in the Bi 3+ state in BiVO 4 (Hu et al 2023). In Fig.…”

Section: Characterization Resultsmentioning

confidence: 94%

A novel visible-light-driven Z-scheme C3N5/BiVO4 heterostructure with enhanced photocatalytic degradation performance

Ma,

Wang,

Wang

et al. 2024

Environ Sci Pollut Res

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“…The identified phases, according to the Crystallography Open Database, correspond to the following entry cards: clinobisvanite (COD 9013437) and dreyerite (COD 9011741) in all cases, and, for the silver modified sample, correspond to metallic silver (COD 9013047). Thus, XRD has confirmed that the iso-type homojunction BiVO 4 is able to reduce Ag + species to metallic nanosilver particles, presumably on the {010} facets [39].…”

Section: Characterization Of the Fe@bvo And Ag@bvo Photocatalystsmentioning

confidence: 87%

“…Processes 2023, 10, x FOR PEER REVIEW 8 of 17 9013047). Thus, XRD has confirmed that the iso-type homojunction BiVO4 is able to reduce Ag + species to metallic nanosilver particles, presumably on the {010} facets [39].…”

Section: Characterization Of the Fe@bvo And Ag@bvo Photocatalystsmentioning

confidence: 88%

“…Taking into consideration the standard reduction potentials of Fe 2+ and Bi 3+ , we can arrive at a hasty conclusion that reduction of Bi 3+ with Fe 2+ is unlikely (Fe 3+ + e − → Fe 2+ , E • = +0.770 V; Bi 3+ + 3e − → Bi 0 , E • = +0.309 V), which would be the case in the absence of light. However, during the attempted photomodification procedure, photogenerated holes accumulate on {110} facets of BiVO 4 [39]. The holes may oxidize Fe 2+ to Fe 3+ , thus forming surface oxygen vacancies by the reaction of Fe 2+ with the Bi-O bond, thereby leading to a decreased Bi 4f 5/2 splitting binding energy as detected by XPS.…”

Section: Spectramentioning

confidence: 99%

“…The holes may oxidize Fe 2+ to Fe 3+ , thus forming surface oxygen vacancies by the reaction of Fe 2+ with the Bi-O bond, thereby leading to a decreased Bi 4f 5/2 splitting binding energy as detected by XPS. The scavenging of the photogenerated holes by Fe 2+ , in turn, leads to an increased accumulation of photogenerated electrons on the {010} BiVO 4 facets [39], facilitating O 2 reduction to hydrogen peroxide [48]. Thus, favorable circumstances occur for the initiation of the photo-Fenton process during the photomodification procedure, whereby additional hydroxyl radicals (•OH) are generated.…”

Section: Spectramentioning

confidence: 99%

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Enhancing the Photocatalytic Performance of BiVO4 for Micropollutant Degradation by Fe and Ag Photomodification

Popović,

Sharifi,

Kraljić Roković

et al. 2023

Processes

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Wider application of BiVO4 (BVO) for photocatalytic water treatment is primarily limited by its modest photocatalytic effectiveness, despite its appropriately narrow band gap for low-cost, sunlight-facilitated water treatment processes. In this study, we have photomodified an isotype BVO, consisting of a tetragonal zircon and monoclinic scheelite phase, with Fe (Fe@BVO) and Ag (Ag@BVO) ionic precursors under UV illumination in an aqueous ethanol solution in order to assess their effect on the opto-electronic properties and effectiveness for the removal of ciprofloxacin (CIP). Fe@BVO failed to demonstrate enhanced effectiveness over pristine BVO, whereas all Ag@BVO achieved improved CIP degradation, especially 1% Ag@BVO. At pH 4 and 6, 1% Ag@BVO demonstrated nearly 24% greater removal of CIP than BVO alone. Photomodification with Fe created surface oxygen vacancies, as confirmed by XPS and Mott–Schottky analysis, which facilitated improved electron mobility, although no distinct Fe-containing phase nor Fe-doping was detected. On the other hand, the introduction of mid-band gap states by oxygen vacancies decreased the reducing power of the photogenerated electrons as the flat band potentials were shifted to more positive values, thus likely negatively impacting superoxide formation. In contrast, Ag-photomodification (Ag@BVO) resulted in the formation of Ag2O/AgO and Ag nanoparticles on the surface of BVO, which, under illumination, generated hot electrons by surface plasmon resonance and enhanced the mobility of photogenerated electrons. Our research underscores the pivotal role of photogenerated electrons for CIP degradation by BiVO4-based materials and emphasizes the importance of appropriate band-edge engineering for optimizing contaminant degradation.

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Boosting photocatalytic degradation of levofloxacin over plasmonic TiO2-x/TiN heterostructure

Liu,

Peng,

Gao

et al. 2024

Applied Surface Science

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The {0 1 0} and {1 1 0} facets of BiVO4 were selectively modified by Cu and g-C3N4 to enhance its visible light photocatalytic performance

Cited by 12 publications

References 57 publications

A novel visible-light-driven Z-scheme C3N5/BiVO4 heterostructure with enhanced photocatalytic degradation performance

A novel visible-light-driven Z-scheme C3N5/BiVO4 heterostructure with enhanced photocatalytic degradation performance

Enhancing the Photocatalytic Performance of BiVO4 for Micropollutant Degradation by Fe and Ag Photomodification

Boosting photocatalytic degradation of levofloxacin over plasmonic TiO2-x/TiN heterostructure

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