Comparison of the performance of Ag-deposited ZnO and TiO2 nanoparticles in levofloxacin degradation under UV/visible radiation

Jandaghian, Fahimeh; Pirbazari, Azadeh Ebrahimian; Tavakoli, Omid; Asasian‐Kolur, Neda; Sharifian, Seyedmehdi

doi:10.1016/j.hazadv.2023.100240

Cited by 10 publications

(10 citation statements)

References 34 publications

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“…[10][11][12] In spite of much research on the effect of ZnO materials that have been explored for the removal of organic pollutants, the significant disadvantage of ZnO materials is the broadband gap and quick recombination of electronhole pairs, hindering its photocatalytic efficiency and restricting its widespread use in the industry. [13] Therefore, various attempt has been concerned at synthesizing a modified ZnO photocatalyst via replacement of metal or non-metal ions, [5,6,8,10] combination with another semiconductor, [14][15][16] and deposition of noble metals on the surface. [16][17][18] Recently, the deposition of noble metals (Ag, Au, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…[13] Therefore, various attempt has been concerned at synthesizing a modified ZnO photocatalyst via replacement of metal or non-metal ions, [5,6,8,10] combination with another semiconductor, [14][15][16] and deposition of noble metals on the surface. [16][17][18] Recently, the deposition of noble metals (Ag, Au, etc.) onto the surface of ZnO is an effective approach to enhance photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

“…Among these, ZnO decorated with noble metal Ag nanoparticles has shown better photocatalytic performance and increased catalyst stability than pure ZnO. [16,17] In 2010, Xie and Wu reported the ZnO/Ag nanospheres for enhancing the photodegradation of Rhodamine B under UV light. [19] Six years later, the Ag/ZnO nanoparticles were synthesized via the solvothermal method using CTABr as a template to improve MB degradation.…”

Section: Introductionmentioning

confidence: 99%

“…onto the surface of ZnO is an effective approach to enhance photocatalytic activity. Among these, ZnO decorated with noble metal Ag nanoparticles has shown better photocatalytic performance and increased catalyst stability than pure ZnO [16,17] …”

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of ZnO/Ag Nanostructure with Enhanced Photocatalytic Activity

et al. 2023

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A series of x%Ag/ZnO (x: 0; 1; 2; 5; 10) nanostructures were successfully synthesized through the facile method. The material's structures were confirmed through X‐ray diffraction, while their morphology, elemental distribution, and components were analyzed using cross‐sectional transmission electron microscopy (XTEM), Field‐emission scanning electron microscopy (FESEM). The optical properties of Ag/ZnO revealed a decrease in band gap from 3.2 eV to 2.83 eV and a significant reduction in photoluminescence intensity with increasing Ag nanoparticle loading on the surface of ZnO. The photocatalytic activity of synthesized Ag/ZnO flower‐like nanostructure was evaluated in the photodegradation of methylene blue (MB) under UV‐Vis irradiation. The photocatalytic results indicated that decorating Ag nanoparticles on the surface of ZnO improved the photodegradation of MB. Interestingly, the 5%Ag/ZnO showed the highest effectiveness, achieving a 99% removal efficiency of MB for 60 minutes under UV‐Vis irradiation. Notably, the ultra performance liquid chromatography‐ tandem mass spectroscopy (UPLC‐MS/MS) confirmed the structure of intermediates, while total organic carbon (TOC) removal was 47%. Moreover, the proposed mechanism for the charge transfer process was based on the results of radical scavenging experiments, which showed that superoxide was the dominant reactive species. Finally, the 5%Ag/ZnO was stable and reused at least five times.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of ZnO/Ag Nanostructure with Enhanced Photocatalytic Activity

et al. 2023

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“…ZnO and TiO 2 have drawn the most attention among photocatalysts and are thought to be the most effective. Due to their relatively better results in terms of degradation of various organic pollutants, both ZnO and TiO 2 have been suggested for use in environmental applications. − …”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of ZnO and Black TiO₂ Materials and Their Application in Photodegradation of Organic Pollutants

Nawaz,

Ullah,

Ghanim

et al. 2023

ACS Omega

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ZnO and black TiO2 have been selected as the most efficient materials for organic pollution abatement due to their increased efficiency when compared to other materials. However, the concept of green chemistry makes it desirable to design green synthesis approaches for their production. In this study, black TiO2 was synthesized using an environmentally safe synthetic technique with glycerol as a reductant. ZnO was prepared by using ionic-liquid-based microwave-assisted extracts of Polygonum minus. To investigate the materials′ potential to photodegrade organic pollutants, methylene blue (MB) and phenol were chosen as model organic pollutants. Both materials were found to exhibit spherical morphologies and a mesoporous structure and were efficient absorbers of visible light. ZnO exhibited electron–hole pair recombination lower than that of black TiO2. Black TiO2 was discovered to be an anatase phase, whereas ZnO was found to have a hexagonal wurtzite structure. In contrast to black TiO2, which had a surface area of 239.99 m2/g and a particle size of 28 nm, ZnO had a surface area of 353.11 m2/g and a particle size of 32 nm. With a degradation time of 60 min, ZnO was able to eliminate 97.50% of the 40 mg/L MB. Black TiO2, on the other hand, could reduce 90.0% of the same amount of MB in 60 min. When tested for phenol degradation, ZnO and black TiO2 activities were reduced by nearly 15 and 25%, respectively. A detailed examination of both ZnO and black TiO2 materials revealed that ZnO has more potential and versatility for the degradation of organic pollutants under visible light irradiation.

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Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

Valim,

Carneiro,

Lourenço

et al. 2023

J Appl Electrochem

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The present work sought to investigate H 2 O 2 generation using a gas diffusion electrode composed of carbon with niobium oxide for the degradation of levo oxacin. Results showed that the oxide formed was Nb 2 O 5 (crystallographic structure was con rmed by XRD; chemical composition detected by XPS) and the increase in the Nb/C ratio led to more crystalline structure and higher crystallite size. The carbon with 5% Nb 2 O 5 presented an average particle size of 5.6 nm and this material led to the generation of the highest amount of H 2 O 2 (317.6 mg L − 1 ). The C/5% Nb 2 O 5 -modi ed GDE was applied for the degradation of levo oxacin in an acid medium, in the presence and absence of Fe 2+ ions. Long-term experiments conducted for the analysis of the time required for the total removal of levo oxacin showed that 96% of levo oxacin and 66% of organic load were removed in 270 min of treatment at the current density of 100 mA cm − 2 . HighlightsNb 2 O 5 on carbon increased the H 2 O 2 generation by 236% compared to unmodi ed carbon In 90 min, 46% of the organic load was removed at 100 mA cm -2 Levo oxacin degradation, in 270 min, reached 96% at 100 mA cm -2

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Comparison of the performance of Ag-deposited ZnO and TiO2 nanoparticles in levofloxacin degradation under UV/visible radiation

Cited by 10 publications

References 34 publications

Facile Synthesis of ZnO/Ag Nanostructure with Enhanced Photocatalytic Activity

Facile Synthesis of ZnO/Ag Nanostructure with Enhanced Photocatalytic Activity

Green Synthesis of ZnO and Black TiO₂ Materials and Their Application in Photodegradation of Organic Pollutants

Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

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Comparison of the performance of Ag-deposited ZnO and TiO2 nanoparticles in levofloxacin degradation under UV/visible radiation

Cited by 10 publications

References 34 publications

Facile Synthesis of ZnO/Ag Nanostructure with Enhanced Photocatalytic Activity

Facile Synthesis of ZnO/Ag Nanostructure with Enhanced Photocatalytic Activity

Green Synthesis of ZnO and Black TiO2 Materials and Their Application in Photodegradation of Organic Pollutants

Synthesis of Nb2O5/C for H2O2 electrogeneration and its application for the degradation of levofloxacin

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Green Synthesis of ZnO and Black TiO₂ Materials and Their Application in Photodegradation of Organic Pollutants