Nanostructured bismuth vanadate (BiVO4) thin films for efficient visible light photocatalysis

Venkatesan, R.; Velumani, S.; Ordon, Karolina; Makowska‐Janusik, M.; Corbel, Gwenaël; Kassiba, A.

doi:10.1016/j.matchemphys.2017.11.004

Cited by 54 publications

(23 citation statements)

References 57 publications

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“…The intensity of the Raman shifts at 210, 340,375, 645.9, and 830.4 cm −1 increases with the content of BiVO 4 . From this set of signals, both 325 and 367 cm −1 correspond to the bending modes of the VO 4 groups, meanwhile, the peak at 830.4 cm −1 is attributed to the symmetric stretching of the V-O bond within BiVO 4 21,25 . Finally, the Raman mode at 154.8 cm −1 has a remarkable inconsistency, for the 1:0.6 sample its small intensity can be attributed to a lower content of TiO 2 , whereas, a slightly intense signal from the 1:10 ratio is due to its high TiO 2 content.…”

Section: Resultsmentioning

confidence: 95%

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

Drisya

Solís-López

Ríos-Ramírez

et al. 2020

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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: Resultsmentioning

confidence: 95%

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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“…Vanadate compounds are widely used matrices for luminescent rare earth (RE) ions dopants as they satisfy high efficiency of excitation of activator through the matrix. A wide range of possible applications of vanadate nanoparticles have attracted significant research efforts to development of new vanadate compositions with improved characteristics depending on requirements of various practical tasks (Zhu et al, 2018;Chornii et al, 2016;Biswas et al, 2017;Venkatesan et al, 2018;. Studying the Eu 3+ -activated LaVO 4 vanadate nanoparticles, we have achieved increase of emission intensity in 10 times using various synthesis conditions (Chukova et al, 2013(Chukova et al, , 2015(Chukova et al, , 2018.…”

Section: Introductionmentioning

confidence: 89%

“…The PLD process for the LaVO 4 compounds was only episodically reported previously (Higuchi et al, 2011;Inada et al, 2018). The PLD films of orthovanadates were studied more intensively for BiVO 4 in connection with photocatalysis applications (Rettie et al, 2014;Jeong et al, 2017;Venkatesan et al, 2018) and for luminescent YVO 4 :Eu (Kang et al, 2001;Kim et al, 2004;Zhu et al, 2014) and for GdVO 4 :Nd (Bae et al, 2007;Bär et al, 2006;Dong et al, 2006;Yi et al, 2006) in connections with laser applications. The aim of this work is to develop and investigate model thin films with luminescent vanadate nanoparticles grown on various substrates and to study dependencies of their properties on type of substrates and growth conditions.…”

Section: Introductionmentioning

confidence: 94%

Pulsed laser deposition of the LaVO4:Eu, Ca nanoparticles on glass and silicon substrates

et al. 2020

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Thin films from the L VO 4 :Eu,Ca nanoparticles were successfully grown by pulsed laser deposition method on glass and silicon substrates for the first time. Morphology and thickness of the films depend on a type of substrate and a number of pulses. The films are of 27-220 nm thickness and formed by very small particles (up to 20 nm) and also can contain single nanoparticles with dimensions 40-60 nm and sometimes agglomerates of nanoparticles. Spectral properties of the samples have been investigated and discussed. The vanadate films deposited on the silicon substrates lead to appearance of antireflection properties in the visible range. Luminescence spectra of the investigated films consist of narrow lines caused by f-f transitions in the Eu 3+ ions. For the samples on glass substrates the wide bands of glass emission are also contributed to the spectra. The optimal experimental conditions those allowed to obtain films promising for applications as luminescent converters are considered.

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“…[117][118][119][120][121][122] Lately in 2017, Venkatesan et al combined mechanochemical synthesis and Rf-sputtering for the synthesis of BiVO4 films with nano-structural islands which displayed good activity for the degradation (complete degradation in 240 min) of rhodamine-6G (Rh6G) under visible light. 123 Besides the above mentioned SC oxides, aurivillius compounds, Bi2An−1BnO3n+3 (A = Ca, Sr, Ba, Pb, Na, K; B = Ti, Nb, Ta, Mo, W, Fe) have also been considered. This particular group possesses a unique special layer structure where (Bi2O2) 2+ layers are interleaved with perovskite-like (An−1BnO3n+1) units.…”

Section: Ternary Oxide (Abo2 Types) Photocatalystsmentioning

confidence: 99%

Nanostructured materials for photocatalysis

et al. 2019

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Nanostructured bismuth vanadate (BiVO4) thin films for efficient visible light photocatalysis

Cited by 54 publications

References 57 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

Pulsed laser deposition of the LaVO4:Eu, Ca nanoparticles on glass and silicon substrates

Nanostructured materials for photocatalysis

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