Substitution of V5+ in BiVO4 with Ni2+ and the Improved Photocatalytic Degradation of Crystal Violet Under White LED Light Irradiation

Pham, Van Thinh; Dao, Bach-Tuyet T.; Nguyen, Hong-Tham T.; Trân, Ngoc Quyên; Hang, Dang Thi Le; Trung, Nguyễn Đình; Lee, Taeyoon; Bạch, Long Giang; Nguyen, Trinh Duy

doi:10.1007/s11244-022-01615-4

Cited by 6 publications

(4 citation statements)

References 39 publications

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“…Therefore, this shift of visible emission could be related to the variation of the local surroundings of the defect sites as a result of annealing the heterojunction sample. In the case of BiVO 4 , two broad peaks at 505 and 410 nm were attributed to the NBE transition and the deep level defects, respectively [50]. In fact, high PL intensity generally characterizes a high recombination rate of the photogenerated charge carrier [51].…”

Section: Resultsmentioning

confidence: 99%

Nesting BiVO₄ nanoislands in ZnO nanodendrites by two-step electrodeposition for efficient solar water splitting

Güler,

Antoš,

Masař

et al. 2024

J. Phys. D: Appl. Phys.

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Photoanodes with a large electrochemically active surface area, rapid charge transfer, and broadband light harvesting capacity are required to maximize the photoelectrochemical (PEC) water splitting performance. To address these features, we demonstrate that 3D hierarchal ZnO nanodendrites (NDs) can be sensitized with BiVO4 nanoislands by chemical and thermal treatments of electrodeposited Bi metal films. The flat band measurements and optical characterization suggested that the resulting heterojunction had type-II band alignment with a viable charge transfer from BiVO4 to ZnO NDs. In parallel, PL analysis revealed inhibition of the charge recombination rate by the electron transfer between BiVO4 and ZnO NDs. Upon AM 1.5 G illumination, BiVO4/ZnO NDs heterojunction yielded the highest photocurrent efficiency (0.15 mA·cm−2 at 1.2 V vs. NHE), which was attributed to its enhanced surface area (due to the presence of small dendrite branches), extended broadband light absorption extending from UV to visible light regions, and the most efficient interfacial charge transfer as proven by electrochemical impedance spectroscopy (EIS) studies. Besides, the incident photon-to-current conversion efficiency and applied bias photon-to-current efficiency tests confirmed an improved spectral photoresponse of the heterojunction based photoanode, particularly towards the visible light spectrum. The results outline a promising synthesis route for building heterojunctions between visible light active and wide band gap semiconductors for the use as a highly efficient photoanodes in a PEC cell.

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Section: Resultsmentioning

confidence: 99%

Nesting BiVO₄ nanoislands in ZnO nanodendrites by two-step electrodeposition for efficient solar water splitting

Güler,

Antoš,

Masař

et al. 2024

J. Phys. D: Appl. Phys.

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“…Ullah et al reported approximately 28 times better CV degradation on the BiVO 4 /Ag/Ag 2 O Z-scheme photocatalyst . Nguyen and co-workers reported that Ni 2+ doping on BiVO 4 can give rise to additional defects in the lattice and thus improve the photocatalytic efficiency of the catalyst …”

Section: Introductionmentioning

confidence: 99%

“…38 Nguyen and co-workers reported that Ni 2+ doping on BiVO 4 can give rise to additional defects in the lattice and thus improve the photocatalytic efficiency of the catalyst. 39 Most CV photocatalytic degradation publications track the decrease in intensity of the peaks in its UV−visible spectrum to ascertain its degradation. Although there are three peaks (250, 305, and 590 nm) in the UV−visible spectrum of CV, 40 these researches focus on the degradation of the most intense peak (λ max = 590 nm).…”

Section: ■ Introductionmentioning

confidence: 99%

“…Nguyen et al 44 found in their study that Co 2+ having a lesser ionic size than Bi 3+ , substituted Bi 3+ in the lattice without disturbing the monoclinic crystal structure. In another study, Pham et al 39 reported that V 5+ substitution with Ni 2+ creates a structural strain, that distorts the monoclinic crystal structure after a certain extent of doping (5% Ni 2+ ). Regmi et al 45 observed that the monoclinic structure remains intact until 2% doping of Cu 2+ in the BiVO 4 lattice, and Cu 2+ substitutes Bi 3+ rather than V 5+ .…”

Section: ■ Introductionmentioning

confidence: 99%

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Photocatalytic Degradation of Crystal Violet on Cu, Zn Doped BiVO₄ Particles

Singh,

Kumar,

Jatav

et al. 2024

Langmuir

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Fabrication of codoped photocatalysts is a developing area of research. Herein, we explore the visible light photocatalytic properties of Cu, Zn codoped BiVO 4 particles. Doping lower valent cations (Cu and Zn) makes the BiVO 4 surface more acidic and enables us to target the basic crystal violet (CV) dye. The adopted hydrothermal protocol of synthesis results in the formation of Cu−Zn codoped monoclinic BiVO 4 particles. Undoped monoclinic BiVO 4 , prepared by the same protocol, showed significant formation of oxygen vacancies. XPS analyses confirm the coexistence of Cu 2+ /Cu + and Zn 2+ dopants. Increased dopant percentage reduced oxygen vacancies. XRD indicates that Cu 2+ /Cu + or Zn 2+ dopants generally substitute Bi 3+ in BiVO 4 . All photocatalysis activities for CV degradation are reported under near-neutral pH conditions. A typical codoped BiVO 4 photocatalyst with 1% Zn and 2% Cu demonstrated the best CV degradation photocatalytic activity. The activity of this Zn, Cu codoped photocatalyst is better than that of pure, Zn-doped, and Cu-doped BiVO 4 samples. Active species trapping experiments indicated the possible photocatalysis mechanism. The photocatalysts exhibited appropriate recyclability and photostability.

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Sustainable approach for photocatalytic and sorptive abatement of crystal violet dye using antimony-doped cerium vanadate (Sb-CeVO4)

Tanveer,

Imran,

Latif

et al. 2024

Int. J. Environ. Sci. Technol.

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Substitution of V5+ in BiVO4 with Ni2+ and the Improved Photocatalytic Degradation of Crystal Violet Under White LED Light Irradiation

Cited by 6 publications

References 39 publications

Nesting BiVO₄ nanoislands in ZnO nanodendrites by two-step electrodeposition for efficient solar water splitting

Nesting BiVO₄ nanoislands in ZnO nanodendrites by two-step electrodeposition for efficient solar water splitting

Photocatalytic Degradation of Crystal Violet on Cu, Zn Doped BiVO₄ Particles

Sustainable approach for photocatalytic and sorptive abatement of crystal violet dye using antimony-doped cerium vanadate (Sb-CeVO4)

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Substitution of V5+ in BiVO4 with Ni2+ and the Improved Photocatalytic Degradation of Crystal Violet Under White LED Light Irradiation

Cited by 6 publications

References 39 publications

Nesting BiVO4 nanoislands in ZnO nanodendrites by two-step electrodeposition for efficient solar water splitting

Nesting BiVO4 nanoislands in ZnO nanodendrites by two-step electrodeposition for efficient solar water splitting

Photocatalytic Degradation of Crystal Violet on Cu, Zn Doped BiVO4 Particles

Sustainable approach for photocatalytic and sorptive abatement of crystal violet dye using antimony-doped cerium vanadate (Sb-CeVO4)

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Nesting BiVO₄ nanoislands in ZnO nanodendrites by two-step electrodeposition for efficient solar water splitting

Nesting BiVO₄ nanoislands in ZnO nanodendrites by two-step electrodeposition for efficient solar water splitting

Photocatalytic Degradation of Crystal Violet on Cu, Zn Doped BiVO₄ Particles