Concurrent role of metal (Sn, Zn) and N species in enhancing the photocatalytic activity of TiO2 under solar light

Rimoldi, L.; Pargoletti, Eleonora; Meroni, D.; Falletta, Ermelinda; Cerrato, G.; Turco, Francesca; Cappelletti, G.

doi:10.1016/j.cattod.2017.12.017

Cited by 32 publications

(37 citation statements)

References 43 publications

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“…As afore-mentioned, we expect that the as-synthesized HTAT photocatalyst can completely degrade tetracycline under simulated solar light irradiation, effectively working out the incomplete degradation of tetracycline for TiO2-based photocatalysts. [16] Therefore, the degradation experiment of TC was further investigated for HTAT photocatalyst under simulated solar light irradiation, while HTA and HT were also used as reference photocatalysts, as demonstrated in Fig. 7.…”

Section: Photocatalytic Degradation Of Tc Under Simulated Solar Lightmentioning

confidence: 99%

“…The photocatalytic results strongly confirm that the HTAT manifests excellent photocatalytic efficiency towards the degradation of tetracycline (TC or TCH), effectively overcoming the disadvantages of many previously reported TiO2-based photocatalysts for the incomplete degradation of tetracycline. [11,[15][16][17]…”

Section: Photocatalytic Degradation Of Tc Under Simulated Solar Lightmentioning

confidence: 99%

“…[14] However, it is still a challenge for completely degrading TC via TiO2-based photocatalysts under simulated solar light irradiation. [11,[15][16][17] Therefore, the novel design is very important in exploring TiO2-based photocatalysts for the complete degradation of tetracycline. Recently, our group successfully constructed SiO2-Ag@TiO2 composite with enhanced catalytic efficiency for degrading TC in comparison with directly immobilizing silver nanoparticles onto the surface of TiO2 by introducing confined effect.…”

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confidence: 99%

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Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Zhao

Chen

Liu

et al. 2019

Chemical Engineering Journal

169

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The complete degradation of tetracycline still is a challenge for TiO2-based photocatalysts under simulated solar light irradiation. To tackle this challenge, we devise Ag nanoparticles (Ag NPs) confined in shell-in-shell hollow TiO2 photocatalyst (HTAT). This strategy mainly involves the construction of CPS@TiO2 core-shell composites, the form of TiO2 inner shell, AgNPs loading by photo-deposition, the assembly of TiO2 outer shell, and phase transition of anatase TiO2 by calcination at 450℃. All characterizations including TEM, STEM Mapping, BET, and XPS confirm the unique structure of the as-synthesized HTAT photocatalyst. As expected, the complete degradation of tetracycline (TC and TCH) can be realized by using HTAT photocatalyst under simulated solar light irradiation because its TiO2 two shells simultaneously take part in the photodegrading reaction of TC or TCH. The transformation intermediates and degradation pathway were analyzed by LC/MS. Our work effectively overcomes the disadvantages of many previously reported TiO2-based photocatalysts for the incomplete degradation of tetracycline.

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Section: Photocatalytic Degradation Of Tc Under Simulated Solar Lightmentioning

confidence: 99%

Section: Photocatalytic Degradation Of Tc Under Simulated Solar Lightmentioning

confidence: 99%

mentioning

confidence: 99%

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Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Zhao

Chen

Liu

et al. 2019

Chemical Engineering Journal

169

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“…The photocatalytic activity of the device was also evaluated towards the degradation of tetracycline. Tetracyclines are the best-selling antibiotics [39] and have been classified as emerging pollutants [40,41]. Due to their large usage in both humans and animals, tetracyclines are among the most frequently detected micropollutants both in wastewaters [42] and in large water basins as the lakes of Northern Italy [43], leading to increased levels of tetracycline-resistant bacteria [44].…”

Section: Photocatalytic Activitymentioning

confidence: 99%

TiO2-SiO2-PMMA Terpolymer Floating Device for the Photocatalytic Remediation of Water and Gas Phase Pollutants

et al. 2018

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Floating photocatalytic devices are highly sought-after as they represent good candidates for practical application in pollutant remediation of large water basins. Here, we present a multilayer floating device for the photocatalytic remediation of contaminants present in water as well as of volatile species close to the water surface. The device was prepared on a novel tailored ter-polymer substrate based on methylmethacrylate, α-methylstyrene and perfluoroctyl methacrylate. The ad hoc synthesized support presents optimal characteristics in terms of buoyancy, transparency, gas permeability, mechanical, UV and thermal stability. The adhesion of the TiO 2 top layer was favoured by the adopted casting procedure, followed by a corona pre-treatment and by the deposition of an intermediate SiO 2 layer, the latter aimed also at protecting the polymer support from photocatalytic oxidation. The device was characterized by contact angle measurement, UV-vis transmittance and scanning electron microscopy. The final device was tested for the photocatalytic degradation of an emerging water pollutant as well as of vapors of a model volatile organic compound. Relevant activity was observed also under simulated solar irradiation and the device showed good stability and recyclability, prospecting its use for the photocatalytic degradation of pollutants in large water basins.

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“…It was fitted into two symmetric peaks. The peaks at 530.3 eV is ascribed to the oxygen in crystal lattice (Ti-O-Ti) and the other peak at 531.6 eV is believed to result from the Ti-O-C bonding, based on previously reported cases [25,32,38]. These results indicated the composite formation of TiO 2 /NGQDs through the C-O-Ti bonds.…”

Section: Structural Characterizationmentioning

confidence: 67%

Facet-Dependent Interfacial Charge Transfer in TiO2/Nitrogen-Doped Graphene Quantum Dots Heterojunctions for Visible-Light Driven Photocatalysis

Lyu

et al. 2019

Catalysts

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Interfacial charge transfer is crucial in the efficient conversion of solar energy into fuels and electricity. In this paper, heterojunction composites were fabricated, comprised of anatase TiO2 with different percentages of exposed {101} and {001} facets and nitrogen-doped quantum dots (NGQDs) to enhance the transfer efficiency of photo-excited charge carriers. The photocatalytic performances of all samples were evaluated for RhB degradation under visible light irradiation, and the hybrid containing TiO2 with 56% {001} facets demonstrated the best photocatalytic activity. The excellent photoactivity of TiO2/NGQDs was owed to the synergistic effects of the following factors: (i) The unique chemical features of NGQDs endowed NGQDs with high electronic conductivities and provided its direct contact with the TiO2 surface via forming Ti–O–C chemical bonds. (ii) The co-exposed {101} and {001} facets were beneficial for the separation and transfer of charge carriers in anatase TiO2. (iii) The donor-acceptor interaction between NGQDs and electron-rich {101} facets of TiO2 could remarkably enhance the photocurrent, thus hindering the charge carriers recombination rate. Extensive characterization of their physiochemical properties further showed the synergistic effect of facet-manipulated electron-hole separation in TiO2 and donor-acceptor interaction in graphene quantum dots (GQDs)/TiO2 on photocatalytic activity.

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Concurrent role of metal (Sn, Zn) and N species in enhancing the photocatalytic activity of TiO2 under solar light

Cited by 32 publications

References 43 publications

Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

Silver nanoparticles confined in shell-in-shell hollow TiO2 manifesting efficiently photocatalytic activity and stability

TiO2-SiO2-PMMA Terpolymer Floating Device for the Photocatalytic Remediation of Water and Gas Phase Pollutants

Facet-Dependent Interfacial Charge Transfer in TiO2/Nitrogen-Doped Graphene Quantum Dots Heterojunctions for Visible-Light Driven Photocatalysis

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