Preparation and photocatalytic properties of Mo-doped BiVO4

Tian, Xin; Zhu, Yongan; Zhang, Wei; Zhang, Zhenyi; Hua, Ruinian

doi:10.1007/s10854-019-02295-9

Cited by 12 publications

(4 citation statements)

References 43 publications

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“…The strong symmetric (ν s ) V-O stretching mode was observed at 822 cm −1 [39], while the monoclinic distortion of the scheelite structure was confirmed by the observation of two distinct Raman bands at 366 and 328 cm −1 arising from the symmetric (δ s ) and antisymmetric (δ as ) bending modes of the VO 4 tetrahedra, as well as the two intense external (rotation/translation) lattice modes at 210 and 124 cm −1 [40]. The introduction of Mo 6+ dopants substituting for V 5+ cations in BiVO 4 was traced by the observation of an additional weak shoulder at about 880 cm −1 [5] related to the corresponding MoO 4 stretching vibration [6,41]. In addition, the ν s band shifted to lower frequencies compared to unmodified BiVO 4 inverse opal films (829 cm −1 ), while the δ s and δ as VO 4 bending modes approached each other for the Mo-BiVO 4 , indicating the averaging of the VO 4 tetrahedral deformation and the reduction of the monoclinic lattice distortion towards the tetragonal phase [6].…”

Section: Raman Analysismentioning

confidence: 99%

“…This is attributed to its narrow band gap, suitable valence band position, abundance, and cost effectiveness [4]. Nonetheless, its practical activity fails to meet its theoretical photocurrent density under solar light illumination due to rapid charge recombination and slow oxidation kinetics [4,5]. Transition metal ions, such as molybdenum (Mo), have been employed to enhance the performance of BiVO 4 under solar light [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, its practical activity fails to meet its theoretical photocurrent density under solar light illumination due to rapid charge recombination and slow oxidation kinetics [4,5]. Transition metal ions, such as molybdenum (Mo), have been employed to enhance the performance of BiVO 4 under solar light [4][5][6]. In our recent study [6], a Mo-BiVO 4 inverse opal film was deposited onto a fluorine-doped tin oxide (FTO) coated glass substrate.…”

Section: Introductionmentioning

confidence: 99%

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Mo-BiVO4 Photocatalytically Modified Ceramic Ultrafiltration Membranes for Enhanced Water Treatment Efficiency

Theodorakopoulos,

Pylarinou,

Sakellis

et al. 2024

Membranes

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This study highlights the effectiveness of photocatalytically modified ceramic ultrafiltration (UF) membranes in alleviating two major drawbacks of membrane filtration technologies. These are the generation of a highly concentrated retentate effluent as a waste stream and the gradual degradation of the water flux through the membrane due to the accumulation of organic pollutants on its surface. The development of two types of novel tubular membranes, featuring photocatalytic Mo-BiVO4 inverse opal coatings, demonstrated a negligible impact on water permeance, ensuring consistent filtration and photocatalytic efficiency and suggesting the potential for maintaining membrane integrity and avoiding the formation of highly concentrated retentate effluents. Morphological analysis revealed well-defined coatings with ordered domains and interconnected macropores, confirming successful synthesis of Mo-BiVO4. Raman spectroscopy and optical studies further elucidated the composition and light absorption properties of the coatings, particularly within the visible region, which is vital for photocatalysis driven by vis-light. Evaluation of the tetracycline removal efficiency presented efficient adsorption onto membrane surfaces with enhanced photocatalytic activity observed under both UV and vis-light. Additionally, vis-light irradiation facilitated significant degradation, showcasing the versatility of the membranes. Total Organic Carbon (TOC) analysis corroborated complete solute elimination or photocatalytic degradation without the production of intermediates, highlighting the potential for complete pollutant removal. Overall, these findings emphasize the promising applications of Mo-BiVO4 photocatalytic membranes in sustainable water treatment and wastewater remediation processes, laying the groundwork for further optimization and scalability in practical water treatment systems.

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Section: Raman Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mo-BiVO4 Photocatalytically Modified Ceramic Ultrafiltration Membranes for Enhanced Water Treatment Efficiency

Theodorakopoulos,

Pylarinou,

Sakellis

et al. 2024

Membranes

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“…A lot of excellent semiconductor photocatalysts with high catalytic activity and stability have been prepared so far, such as TiO2, ZnO, WO3, SrTiO3, BiVO4, Bi2WO6, CdS, ZnIn2S4, etc. [6][7][8][9][10][11][12][13] Among the various photocatalysts, Bi2WO6 has attracted considerable interests because of its excellent physical and chemical properties. Bi2WO6 has a band gap of 2.6~2.8 eV that absorbs a reasonable fraction of the solar spectrum, and has high stability, high oxidation power of valence band (VB) holes.…”

Section: Introductionmentioning

confidence: 99%

Excellent photocatalytic rhodamine B degradation for water remediation over Pr3+ doped Bi2WO6 microspheres

Zhang

2022

J IRAN CHEM SOC

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In this work, a serious of Pr 3+ doped Bi2WO6 had been prepared by one-step hydrothermal method without using any additive. XRD results showed that the Pr 3+ doped Bi2WO6 possessed pure orthorhombic phase. XRD patterns shifted to higher angles with the doping amount of Pr 3+ increasing indicated that Pr 3+ was doped into the lattice of Bi2WO6. UV-vis DRS results revealed that the band gap was narrowed by Pr 3+ doping. SEM and TEM images showed that the Pr 3+ doped Bi2WO6 presented 3D flower-like microspheres constructed by many nanosheets. The photocatalytic activities of the as-prepared samples were evaluated by using rhodamine B (RhB) as the target organic pollutant. It was found that 1% Pr-Bi2WO6 exhibited excellent photocatalytic performance, as well as good stability and reusability. The improved photocatalytic activity can be ascribed to the optimum optical absorption activity, the larger specific surface area and the morphology of microspheres which resulted in the effective separation of the photogenerated electron hole pairs. In addition, the photocatalytic mechanism had been discussed according to the radical-trapping experiments.

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