Insights from Crystal Size and Band Gap on the Catalytic Activity of Monoclinic BiVO4

Thalluri, Sitaramanjaneya Mouli; Martinez-Suarez, C.; Virga, Alessandro; Russo, Nunzio; Saracco, Guido

doi:10.7763/ijcea.2013.v4.315

Cited by 19 publications

(24 citation statements)

References 25 publications

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“…Among the Raman active modes, the peaks at 158 cm −1 and 523.3 cm −1 are assigned to the E g (147 cm −1 ) and A1g (519 cm −1 ) modes respectively, along with a 645.9 cm −1 (640 cm −1 ) signal, all from TiO 2 anatase 38 . On the other hand, the bands located at 346, 375, and 846 cm −1 closely match with the reference by Thalluri et al for m-BiVO 4 (340,375 and 830.4 cm −1 ) 42 observed the shifts for the m-BiVO 4 at 340, 375 and 830.4 cm −121 .…”

Section: Resultssupporting

confidence: 90%

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Drisya

Solís-López

Ríos-Ramírez

et al. 2020

Sci Rep

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Nanocomposites with different ratios of titanium dioxide and bismuth vanadate [TiO 2 ]/[BiVO 4 ] give rise to compatible electronic band structure alignment at their interfaces to ensure enhanced photoactivated charge transfer under visible light. The sol-gel method and suitable post-synthesis thermal treatments were used to synthesize different compositions with stabilized anatase phase of tio 2 and monoclinic scheelite polymorph BiVo 4. Structural, electronic and optical characterizations were performed and the results were analysed as a function of the stoichiometry, in which both crystalline structures show a clear junction formation among their characteristic stacking planes. Photocatalytic and (photo) electrochemical responses of the nanocomposites were investigated and tested for the degradation of azo dyes (Acid Blue-113, AB-113) (~ 99%) under visible light radiation. The nanocomposite with a mass ratio of (1:10) shows the highest photocatalytic efficiency compared to the other compositions. HRTEM images showed marked regions in which both crystalline structures form a clear junction and their characteristic planes. However, the increase of BiVO 4 content in the network overcomes the photocatalytic activity due to the decrease in the reduction potential of the photo-generated electrons with high recombination rates. Due to rapid increase in population and the world's rapid industrialization, natural water bodies are being heavily contaminated with industrial wastes 1,2,3. Pollutants present in the industrial effluents are classified as toxins, carcinogens, mutagens, teratogens, and endocrine-disrupting agents 4. Particularly, the presence of dyes in industrial effluents leads to a decreased penetration of sunlight and a reduction of the photosynthetic activities in aquatic ecosystems, as well as an increase in the biochemical oxygen demand 5. The dyes are specified as dispersive dyes (polyester, nylon and acetate) 6 , reactive dyes (Safira dye, HEXL) 7 , sulphur dyes, and vat dyes (viscous) 8. The Azo dyes are colorants that fall under all of the above-mentioned categories. They contain one or more-N=N-groups in their chemical structure, which consists of highly substituted aromatic rings 9. To ensure water purification, several known methods are well-established: desalination, distillation, filtration, flocculation, reverse osmosis, and sedimentation 10,11 , etc. However, the chemical structure of azo dyes leads to recalcitrant characteristics, i.e., they degrade slowly under natural conditions, and they are also resistant to conventional wastewater treatment processes 6. For this reason, Advanced Oxidation Processes (AOPs), have received a widespread attention in recent years, since they are a very convenient water treatment method that eliminates these types of contaminants 5,7. Among AOPs, photocatalysis is considered as a green alternative to attain an efficient purification of polluted water 12,13. Furthermore, the implementation of photoactive nanomaterials in water treatment show outstanding resul...

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Section: Resultssupporting

confidence: 90%

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Drisya

Solís-López

Ríos-Ramírez

et al. 2020

Sci Rep

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“…S1 (ESI arise from Bi-V vibration, and the peak at 815 cm À1 is attributed to V-O vibration. 31,33,34 Raman spectrum of the product is in good agreement with the crystal structure of Zn 3 (VO 4 ) 2 /BiVO 4 . Fig.…”

Section: Resultssupporting

confidence: 73%

Synthesis of Zn₃(VO₄)₂/BiVO₄ heterojunction composite for the photocatalytic degradation of methylene blue organic dye and electrochemical detection of H₂O₂

et al. 2018

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“…All these Raman band assignments for the present materials correspond well with the literature reports of similar materials. [70][71][72][73][74][75] It has been observed that there is a blue shi in the most intense peak from 825.50 cm À1 to 829.54 cm À1 in materials from SBM0 to SBM3 then red shiing is observed in SBM5 to SBM7. The change of vibrational frequency of V-O can be explained in terms of metal-oxygen bond length and strength.…”

Section: Resultsmentioning

confidence: 98%

“…The modes at 213.23 cm À1 and 126.58 cm À1 are assigned as rotational and translational modes respectively. [70][71][72][73][74][75] The weak bands at 867.50 cm À1 and 374.70 cm À1 are assigned to the n s (MoO 4 ) and d (MoO 4 ) respectively. The band corresponds to the n as (MoO 4 ) might be covered with 825.50 cm À1 peak.…”

Section: Resultsmentioning

confidence: 99%

Insight into the PEC and interfacial charge transfer kinetics at the Mo doped BiVO₄photoanodes

2019

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Insights from Crystal Size and Band Gap on the Catalytic Activity of Monoclinic BiVO4

Abstract: Abstract-Monoclinic

Cited by 19 publications

References 25 publications

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Synthesis of Zn₃(VO₄)₂/BiVO₄ heterojunction composite for the photocatalytic degradation of methylene blue organic dye and electrochemical detection of H₂O₂

Insight into the PEC and interfacial charge transfer kinetics at the Mo doped BiVO₄photoanodes

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Insights from Crystal Size and Band Gap on the Catalytic Activity of Monoclinic BiVO4

Abstract: Abstract-Monoclinic

Cited by 19 publications

References 25 publications

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes

Synthesis of Zn3(VO4)2/BiVO4 heterojunction composite for the photocatalytic degradation of methylene blue organic dye and electrochemical detection of H2O2

Insight into the PEC and interfacial charge transfer kinetics at the Mo doped BiVO4photoanodes

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Synthesis of Zn₃(VO₄)₂/BiVO₄ heterojunction composite for the photocatalytic degradation of methylene blue organic dye and electrochemical detection of H₂O₂

Insight into the PEC and interfacial charge transfer kinetics at the Mo doped BiVO₄photoanodes