Bi 2 O 3 /TiO 2 heterostructures: Synthesis, characterization and their application in solar light mediated photocatalyzed degradation of an antibiotic, ofloxacin

Sood, Swati; Mehta, S.K.; Sinha, Asha; Kansal, Sushil Kumar

doi:10.1016/j.cej.2016.01.017

Cited by 146 publications

(35 citation statements)

References 53 publications

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“…Composite materials of bismuth oxide and titania have been demonstrated to date as being able to degrade various model pollutants, including dyes [15][16][17][18][19], phenol [20,21], toluene [22], various pharmaceuticals [23,24] and pesticides [25] under visible and solar irradiation. These materials may be used in powdered form [17,18,24,26], as well as in the form of solid coatings [21,27,28]. Of the preparation methods, these materials are the most frequently synthesized using the sol-gel method [16,17,19,28], hydrothermal synthesis [18,27,29,30], or a combination of both [20].…”

Section: Introductionmentioning

confidence: 99%

Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts

Ratova

Tosheva

Kelly

et al. 2019

Sustainable Materials and Technologies

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Bismuth oxide -titanium dioxide composite materials were produced by pulsed DC reactive magnetron sputtering onto two types of commercially available titanium dioxide nanoparticles. The use of an oscillating bowl enabled deposition of bismuth oxide uniformly onto loose powders, in contrast to solid substrates typically used for the conventional magnetron sputtering processes.Variation of the deposition time allowed the production of composite materials with different amounts of bismuth oxide. The composite materials, as well as uncoated titania powders, were extensively analysed by a range of analytical techniques, including SEM/EDX, XRD, BET, XPS, TEM and UV-visible diffuse reflectance spectroscopy. Photocatalytic properties of the materials were assessed under simulated visible light irradiation via degradation of acetone and methanol through measurements of carbon dioxide evolution. Additionally, the composite materials were characterised with a newly developed technique of reversed double-beam photoacoustic spectroscopy in order to obtain information on the distribution of electron traps. Bismuth oxide was found in crystalline β-Bi2O3 form on both types of substrates without any additional heat treatment applied. Though the distribution of bismuth oxide on titanium dioxide was found to depend strongly on particle size and deposition time used, the composite materials exhibited significantly enhanced visible light photocatalytic activity compared to either of the commercial titania materials used as a substrate.

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Section: Introductionmentioning

confidence: 99%

Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts

Ratova

Tosheva

Kelly

et al. 2019

Sustainable Materials and Technologies

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“…Other catalysts have been used for the photodegradation of ciprofloxacin such as TiO 2 -montmorillonite [34], iron [35] and ZnWO 4 -CdS [36]. In addition, the photocatalytic degradation of ofloxacin was studied on Bi 2 O 3 /TiO 2 [37]. We show that a purely aqueous synthetic route combining natural phosphate ore and a zinc salt leads to nanosized powders where ZnO photocatalysts are homogeneously associated with the hydroxyapatite particles.…”

Section: Introductionmentioning

confidence: 97%

Zinc oxide-hydroxyapatite nanocomposite photocatalysts for the degradation of ciprofloxacin and ofloxacin antibiotics

Bekkali¹,

Bouyarmane²,

Karbane³

et al. 2018

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Zinc oxide-hydroxyapatite nanocomposites were prepared from a natural phosphate ore via a solvent-free method and evaluated for the photodegradation of two antibiotics in solution. The in situ growth of ZnO followed by thermal treatment allowed for the formation of photocatalytic nanocrystals homogeneously dispersed in the apatite phase. Nanocomposites exhibited higher rates of sorption of ofloxacin and ciprofloxacin compared to the individual phases. At high ZnO loadings, photodegradation performances of the nanocomposites under UV irradiation were equivalent or greater than that of the photocatalytic particles alone, depending on the considered antibiotic. This dependency reflects distinct degradation pathways that were attributed to different affinities of the antibiotics for the nanocomposite particles. Because of its simplicity and versatility, the here-described approach appears very promising for the development of multifunctional platforms for water remediation.

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“…Generally, the wide gap semiconductor has been widely applied in photovoltaic fields due to its low cost, non-toxicity and good chemical stability, especially titanium dioxide (TiO 2 ) [1, [3][4][5][6]. However, the unsatisfactory recombination of photo-generated hole-electron pairs in semiconductor greatly inhibits photoelectric conversion efficiency and limits its industrial application [2,3,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Optical band structure and photogenerated carriers transfer dynamics in FTO/TiO 2 heterojunction photocatalysts

Jiang

Shi

et al. 2016

Applied Catalysis B: Environmental

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Bi 2 O 3 /TiO 2 heterostructures: Synthesis, characterization and their application in solar light mediated photocatalyzed degradation of an antibiotic, ofloxacin

Cited by 146 publications

References 53 publications

Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts

Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts

Zinc oxide-hydroxyapatite nanocomposite photocatalysts for the degradation of ciprofloxacin and ofloxacin antibiotics

Optical band structure and photogenerated carriers transfer dynamics in FTO/TiO 2 heterojunction photocatalysts

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