Enhanced photoactivity of cerium tungstate-modified graphitic carbon nitride heterojunction photocatalyst for the photodegradation of moxifloxacin

Prabavathi, S. Lakshmi; Nkambule, Thabo T.I.; Muthuraj, V.; Mamba, Gcina

doi:10.1007/s10854-020-03692-1

Cited by 33 publications

(11 citation statements)

References 58 publications

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“…Moreover, the addition of OA showed the highest quenching effect, indicating that holes (h + ) were the major reactive species during MXF degradation over Bi 0.85 Ca 0.15 Fe 0.85 Ti 0.15 O 3 . 29…”

Section: Resultsmentioning

confidence: 99%

“…28 In addition, the potential electrostatic repulsion between Bi 0.85 Ca 0.15 Fe 0.85 Ti 0.15 O 3 photocatalyst and MXF antibiotic molecules at pH = 03 produced unfavorable conditions for the degradation reactions. [29][30][31][32] The removal efficiencies of the different doped BFO-related materials are compared with those of our samples (Table 2).…”

Section: Njc Papermentioning

confidence: 99%

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Synthesis of Ti⁴⁺ doped Ca-BiFO₃ for the enhanced photodegradation of moxifloxacin

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Section: Njc Papermentioning

confidence: 99%

Synthesis of Ti⁴⁺ doped Ca-BiFO₃ for the enhanced photodegradation of moxifloxacin

et al. 2022

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“…Considering these results, in addition to the determination of bandgaps (see Figure 6), a tentative mechanism for HER has been proposed (Figure 8). To do this, Mulliken's classical theory of electronegativity has been used [55,56], which makes it possible to establish the position of the edge of the band of the different nanomaterials that form the heterostructure and, based on it, to establish the direction of migration of the photogenerated charge carriers in the catalyst (see eq. 1 and 2).…”

Section: Mechanism Of the Photocatalytic Hydrogen Productionmentioning

confidence: 99%

Biomimetic Catalysts Based on Au@TiO2-MoS2-CeO2 Composites for the Production of Hydrogen by Water Splitting

Fontánez¹,

García²,

Ortiz³

et al. 2022

Preprint

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The photocatalytic hydrogen evolution reaction (HER) by water splitting has been studied, using catalysts based on TiO2 nanowires (TiO2NWs), which were synthesized by a hydrothermal procedure. This nanomaterial was subsequently modified by incorporating different loadings of gold nanoparticles (AuNPs) on the surface, previously exfoliated MoS2 nanosheets, and CeO2 nanoparticles (CeO2NPs). These nanomaterials, as well as the different synthesized catalysts, were characterized by electron microscopy (HR-SEM and HR-TEM), XPS, XRD, Raman, Reflectance and BET surface area. HER studies were performed in aqueous solution, under irradiation at different wavelengths, which were selected through the appropriate use of optical filters. The results obtained show that there is a synergistic effect between the different nanomaterials of the catalysts. The specific area of the catalyst, and especially the increased loading of MoS2 and CeO2NPs in the catalyst substantially improved the H2 production. Recyclability studies showed only a decrease in activity of approx. 7% after 15 cycles of use, which opens many possibilities regarding the potential use and scaling of these heterostructures in photocatalytic production of H2 from water.

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“…Taking into account these results, together with the determination of the bandgaps (see Figure 5), a photodegradation mechanism of CFX and LFX using 10%Au@ZnONPs-3%rGO-3%gC3N4 (Figure 9) has been proposed. For this, the Mulliken electronegativity theory [57,58] has been used, which allows establishing the band edge position of the different components of the catalyst and, in this way, determining the migration direction of the photogenerated charge carriers in the composite (eq. 1 and 2).…”

Section: Proposed Photodegradation Mechanism For Cfx and Lfxmentioning

confidence: 99%

Photocatalytic Degradation of Fluoroquinolone Antibiotics in Solution

Machín¹,

Márquez²,

Fontánez³

et al. 2022

Preprint

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The photocatalytic degradation of two quinolone-type antibiotics (ciprofloxacin and levofloxacin) in aqueous solution was studied, using catalysts based on ZnO nanoparticles, which were synthesized by a thermal procedure. The efficiency of ZnO was subsequently optimized by incorporating different co-catalysts of gC3N4, reduced graphene oxide and nanoparticles of gold. The catalysts were fully characterized by electron microscopy (TEM and SEM), XPS, XRD, Raman, and BET surface area. The most efficient catalyst was 10%Au@ZnONPs-3%rGO-3%gC3N4, allowing to obtain degradations of both pollutants above 96%. This catalyst has the largest specific area, and its activity has been related to a synergistic effect, involving factors as relevant as the surface of the material and the ability to absorb radiation in the visible region, mainly produced by the incorporation of rGO and gC3N4 to the semiconductor. The use of different scavengers during the catalytic process, was used to establish the possible photodegradation mechanism of both antibiotics.

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Enhanced photoactivity of cerium tungstate-modified graphitic carbon nitride heterojunction photocatalyst for the photodegradation of moxifloxacin

Cited by 33 publications

References 58 publications

Synthesis of Ti⁴⁺ doped Ca-BiFO₃ for the enhanced photodegradation of moxifloxacin

Synthesis of Ti⁴⁺ doped Ca-BiFO₃ for the enhanced photodegradation of moxifloxacin

Biomimetic Catalysts Based on Au@TiO2-MoS2-CeO2 Composites for the Production of Hydrogen by Water Splitting

Photocatalytic Degradation of Fluoroquinolone Antibiotics in Solution

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Enhanced photoactivity of cerium tungstate-modified graphitic carbon nitride heterojunction photocatalyst for the photodegradation of moxifloxacin

Cited by 33 publications

References 58 publications

Synthesis of Ti4+ doped Ca-BiFO3 for the enhanced photodegradation of moxifloxacin

Synthesis of Ti4+ doped Ca-BiFO3 for the enhanced photodegradation of moxifloxacin

Biomimetic Catalysts Based on Au@TiO2-MoS2-CeO2 Composites for the Production of Hydrogen by Water Splitting

Photocatalytic Degradation of Fluoroquinolone Antibiotics in Solution

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Synthesis of Ti⁴⁺ doped Ca-BiFO₃ for the enhanced photodegradation of moxifloxacin

Synthesis of Ti⁴⁺ doped Ca-BiFO₃ for the enhanced photodegradation of moxifloxacin