Efficient α/β-Bi 2 O 3 composite for the sequential photodegradation of two-dyes mixture

Gadhi, Tanveer A.; Hernández-Gordillo, Agileo; Bizarro, Monserrat; Jagdale, Pravin; Tagliaferro, Alberto; Rodil, S.E.

doi:10.1016/j.ceramint.2016.05.087

Cited by 106 publications

(26 citation statements)

References 47 publications

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“…Chromophoric structure i.e. indigoid (NHC = CNH) group and secondary products are benzene (Isatin sulfonic acid) and carboxylic acid (2-amine-5-sulfo-benzoic acid) groups are observed in the region 210 to 260 nm of IC dye is destroyed via oxidation [34]. The decoloration of dye takes place after 120 min irradiation.…”

Section: Results and Disscusionmentioning

confidence: 99%

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

et al. 2019

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Here, we have successfully synthesised β-SnWO 4 Nps via simple and low-cost co-precipitation method. XRD pattern confirms the wolframite cubic structure of β-SnWO 4 Nps which is belonging to P 213 or T 4 space group with an average crystallite size of ~38 nm. FTIR spectrum of β-SnWO 4 Nps shows the bands at 620-825 cm −1 is assigned to characteristical stretching and bending vibrational modes of WO 6 6 , W-W bonds and stretching vibration of W-O-W bridging bonds in β-SnWO 4. UV-DRS spectrum shows the strong absorption band edge at 604 nm and the estimated bandgap of β-SnWO 4 Nps is found to be 1.9 eV. The β-SnWO 4 shows excellent photocatalytic activity against indigo carminedye under various conditions of β-SnWO 4 Nps. In addition to this, the electrochemical senor performance toward the quantification of dopamine at nanomolar concentration and anode material for Li-ion batteries by showing high reversible discharge/ charge capacity was explored.

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Section: Results and Disscusionmentioning

confidence: 99%

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

et al. 2019

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“…Photocatalysis has been recognized as an eco-friendly, less expensive, non-selective and effective alternative in the treatment of effluents. Thus, a number of studies have demonstrated that heterogeneous photocatalysis is a promising approach of Advanced Oxidation Process in the treatment of dyestuffs in the liquid phase [2][3][4][5][6][7][8][9][10][11]. In most of these studies, lab prepared dyes solutions or synthetic wastewater are employed and only a few researchers have conducted studies by using real industrial wastewater samples [12,13].…”

Section: Introductionmentioning

confidence: 99%

Fluorinated and Platinized Titania as Effective Materials in the Photocatalytic Treatment of Dyestuffs and Stained Wastewater Coming from Handicrafts Factories

et al. 2019

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In this study, commercial and lab-prepared TiO2 were modified by fluorination and platinum photodeposition; and the effect of these modifications over the physicochemical and photocatalytic properties of TiO2 was evaluated. It was found that F and Pt addition leads to the modification of the optical and textural properties of TiO2. The materials prepared were tested in the photocatalytic degradation of different organic dyestuffs such as methylene blue (MB) and methyl orange (MO); the degradation of commercial anilines employed in the staining of natural fibers was also evaluated. Photocatalysis was also studied in this work as an eco-friendly treatment of wastewater coming from handicrafts factories. In general it was observed that the effectiveness of the photocatalytic treatment strongly depends on the substrate to be degraded, thus, fluorinated and platinized commercial Titania (Pt-F-P25) showed the best photocatalytic performance in the MB and MO photodegradation and in contrast, in the case of the anilines the highest degradation was obtained over commercial TiO2 fluorinated (F-P25). These results can be explained by differences observed in the structure and in the adsorption of these dyestuffs over the photocatalysts surfaces. F-P25 photocatalyst also demonstrated to be the best material for the treatment of real wastewater coming from handicrafts factories.

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“…The δ ‐Bi 2 O 3 possessing oxygen‐deficient fluorite structure has been a well celebrated candidate in terms of its exceptionally high oxide ion conductivity (1 S cm −1 at 750°C) . Enhanced photo conductivity, excellent photoluminescence, and variable band gap have expanded the utility of polymorphs of Bi 2 O 3 as gas sensors, electrical ceramics, catalysts, and photocatalysts . While Bi 2 O 3 is stabilized in the δ polymorph form by most rare earths, Eu 3+ and Tb 3+ tend to stabilize the β form.…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] Enhanced photo conductivity, excellent photoluminescence, and variable band gap have expanded the utility of polymorphs of Bi 2 O 3 as gas sensors, electrical ceramics, catalysts, and photocatalysts. [9][10][11][12][13][14][15][16][17][18][19] While Bi 2 O 3 is stabilized in the δ polymorph form by most rare earths, Eu 3+ and Tb 3+ tend to stabilize the β form. This presents a challenge to use Eu 3+ and Tb 3+ luminescence to study the oxygen-deficient δ-Bi 2 O 3 .…”

Section: Introductionmentioning

confidence: 99%

Luminescence properties of Eu³⁺‐ and Tb³⁺‐doped δ‐Bi₂O₃ stabilized by Th⁴⁺ substitution

et al. 2019

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The extent of incorporating Eu3+ and Tb3+ for bismuth in the oxygen‐deficient fluorite structured Bi0.50Th0.50Oy has been examined together with the comprehension of their luminescence characteristics. The samples were synthesized by solution combustion method from which doping limits of Eu3+ and Tb3+, respectively, in the fluorite structure was determined. Uniform distribution of constituent elements was confirmed from elemental mapping. Doping Eu3+ and Tb3+‐ions introduced compressive strain and oxygen vacancies in the system. Raman spectra of doped samples confirmed the fluorite structure and revealed the existence of oxygen vacancies in them. While Tb‐doped samples showed a systematic decrease in band gap with increase in dopant concentration, such systematic variation was not observed for Eu‐doped samples. Conclusions about the local site symmetry around Eu3+ and Tb3+ ions in the defect fluorite structure have been drawn from the photoluminescent spectral analysis of doped samples. Energy transfer from Bi3+ to Eu3+ and Tb3+‐has been observed in these samples. The Judd‐Ofelt analysis has been carried out to understand luminescence characteristics in these samples.

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Efficient α/β-Bi 2 O 3 composite for the sequential photodegradation of two-dyes mixture

Cited by 106 publications

References 47 publications

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

Fluorinated and Platinized Titania as Effective Materials in the Photocatalytic Treatment of Dyestuffs and Stained Wastewater Coming from Handicrafts Factories

Luminescence properties of Eu³⁺‐ and Tb³⁺‐doped δ‐Bi₂O₃ stabilized by Th⁴⁺ substitution

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Efficient α/β-Bi 2 O 3 composite for the sequential photodegradation of two-dyes mixture

Cited by 106 publications

References 47 publications

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

Facile synthesis of nanocrystalline β-SnWO4: as a photocatalyst, biosensor and anode for Li-ion battery

Fluorinated and Platinized Titania as Effective Materials in the Photocatalytic Treatment of Dyestuffs and Stained Wastewater Coming from Handicrafts Factories

Luminescence properties of Eu3+‐ and Tb3+‐doped δ‐Bi2O3 stabilized by Th4+ substitution

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Luminescence properties of Eu³⁺‐ and Tb³⁺‐doped δ‐Bi₂O₃ stabilized by Th⁴⁺ substitution