Formation of nanogranular ZnO ultrathin films and estimation of their performance for photocatalytic degradation of amoxicillin antibiotic

Boussatha, N.; Gilliot, Mickaël; Ghoualem, H.; Martin, Jérôme

doi:10.1016/j.materresbull.2017.11.053

Cited by 23 publications

(6 citation statements)

References 70 publications

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“…SEM pictures of Figure 3a-c confirm the nanogranular morphology of the ZnO matrix previously reported [43]. These micrographs show that, starting with 20 nm-sized Ag NPs in the deposition process, we obtain ZnO nanocomposite thin films containing Ag aggregates of 100 nm in size uniformly distributed on their surface.…”

Section: Nanocomposites Characterizationssupporting

confidence: 86%

Effects of Ag Nanoparticles on Zinc Oxide Photocatalytic Performance

et al. 2021

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We used a sol–gel spin coating technique to synthesize nanocomposite thin films based on zinc oxide (ZnO) loaded with silver nanoparticles (NPs). We tested these ZnO/Ag NP photocatalysts, with a thickness of about 100 nm, for the photodegradation of the indigo carmine dye solution. The study focused on the effects of Ag NPs on the ZnO matrix as well as the impact of their concentration on the photocatalytic performance of the nanocomposite. The study also highlighted the high stability of the photocatalytic performance of these nanocomposites. This work is a contribution in the search for non-toxic thin film photocatalysts that is usable under solar radiation for the treatment of contaminated wastewater. Innovation in the field of heterogeneous photocatalysis requires the use of solar resource with efficient results in terms of photocatalytic performance.

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Section: Nanocomposites Characterizationssupporting

confidence: 86%

Effects of Ag Nanoparticles on Zinc Oxide Photocatalytic Performance

et al. 2021

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“…This additional step is required due to the potential adverse effects of photoactive materials on the natural environment, resulting in a significant cost increase. 3 An alternative solution is the use of immobilised catalysts, which do not require subsequent recovery steps 4 and can be more easily scaled up. However, the challenge with immobilized catalysts is the significant loss of PCA once they are supported, generally attributed to a lower surface area and mass transfer coefficient in the reactor.…”

Section: Introductionmentioning

confidence: 99%

Multiscale design of ZnO nanostructured photocatalysts

Ramirez-Canon

Medina-Llamas

Vezzoli

et al. 2018

Phys. Chem. Chem. Phys.

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A systematic investigation of the photocatalytic activity (PCA) of nanostructured ZnO films showed how this is directly affected by the films' morphology at different scales, from the macroscale morphology of films (e.g. thickness and surface area), to the microscale feature arrangement (e.g. aligned vs. randomly oriented structures or interpenetrated ones), to the nanoscale structure (e.g. crystal size and orientation). The interest in immobilizing photocatalysts in water treatment stems from concerns about the potential toxicity of their slurry form, which requires expensive downstream removal. Immobilisation, though, leads to a reduction in PCA, generally attributed to a lower surface area. By reducing the films' feature size to the nanoscale, an immobilized photocatalyst with high surface area can be achieved. At this scale, however, feature structuring and morphology become important as they determine the interaction between light and the photocatalytic material. In this work, nanostructured ZnO films with different morphology, arrangement and structure were produced by electrochemical anodization of zinc and were tested using the degradation of phenol in a batch reactor as a model system. Results show that the PCA for immobilized catalysts can be optimised by controlling microscale arrangement (light absorbance capacity) and nanoscale structure (crystal size and orientation) rather than macroscale morphology (surface area). These results provide a clear direction to maximising the photocatalytic activity of immobilised photocatalysts for the removal of organic pollutants from water.

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“…Other applications include catalysis, photodegradation of microorganisms, varistors, antifungal and piezodielectric nanogenerators (Rahman et al ., 2013; Abdiryim et al ., 2014; Geetha et al ., 2016). ZnO is also used in solar cells, photoluminescent material, transparent conductive and optical coatings, gas sensors, electrical devices, antibacterial coatings, transparent conducting oxide, photodetectors and light‐emitting diodes (Jafarirad et al ., 2016; Çolak and Karaköse, 2017; Boussatha et al ., 2018). Since ZnO nanoparticle shows outstanding UV‐protection and antibacterial action, it gives rise to its promising application in ceramic, water‐based coating and texture finishing agent, which are categorised as aqueous systems (Tang et al ., 2006; Khan et al ., 2018).…”

Section: Photocatalysis Technique For the Treatment Wastewatermentioning

confidence: 99%

“…It hinders nucleation and coalescence of NPs by regulating the aggregation of NPs (Reddy and Mandal, 2017). Polyol, one of the main compound found in plant extracts is which acts as a chelating and capping agent which stabilizes NPs which prevent the aggregation of particles, which is more advantageous compared to chemical and physical synthesis (Shah and Kumar Kotnala, 2017; Boussatha et al ., 2017). From Table 6, it can be concluded that various plant parts have been successfully used to modify ZnO NPs.…”

Section: Photocatalysis Technique For the Treatment Wastewatermentioning

confidence: 99%

Photocatalysis of xenobiotic organic compounds in greywater using zinc oxide nanoparticles: a critical review

Yashni

Al‐Gheethi

Hossain

et al. 2020

Water & Environment J

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The direct discharge of raw bathroom greywater has increased the concentrations of various pollutants in the water bodies. Typically, greywater contains large quantities of xenobiotic organic compounds (XOCs) owing to an increase in consumption of personal care and bath products. Therefore, it urges for a suitable technology to eliminate these compounds from contaminated waters. Photocatalytic degradation using Zinc Oxide nanoparticles (ZnO NPs) has the potentiality to eliminate various XOCs. However, ZnO NPs have high tendency to aggregate, which may lower the photocatalytic degradation rate. Therefore, there is an urgency to modify ZnO NPs to overcome the limitation. The present review was conducted to determine a suitable method for the modification ZnO NPs. Besides, the potential of the modified ZnO NPs in degrading XOCs in greywater as a photocatalyst was also discussed.

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Formation of nanogranular ZnO ultrathin films and estimation of their performance for photocatalytic degradation of amoxicillin antibiotic

Cited by 23 publications

References 70 publications

Effects of Ag Nanoparticles on Zinc Oxide Photocatalytic Performance

Effects of Ag Nanoparticles on Zinc Oxide Photocatalytic Performance

Multiscale design of ZnO nanostructured photocatalysts

Photocatalysis of xenobiotic organic compounds in greywater using zinc oxide nanoparticles: a critical review

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