Study on the photocatalytic activity of titanium dioxide nanostructures: Nanoparticles, nanotubes and ultra-thin films

Molina, Joel; Romero-Morán, Alejandra; Uribe-Vargas, Héctor; López-Ruíz, Beatríz; Sánchez-Salas, José Luis; Ortega, Eduardo; Ponce, Arturo; Morales–Sánchez, A.; López-Huerta, Francisco; Zúňiga‐Islas, Carlos

doi:10.1016/j.cattod.2018.05.033

Cited by 38 publications

(19 citation statements)

References 30 publications

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“…Similarly, another study by Abida et al suggests uniform TNT with an outer diameter of 6–13 nm and a length of 400 nm was obtained with an operational temperature of 130 °C for 20 h (Abida et al 2011 ; Bhullar et al 2019 ). In the present study, the hydrothermal method was adopted for the synthesis of TNT to obtain nanotubes of low diameter and due to its antimicrobial activity against a broad range of microorganisms (Bardhan et al 2019 ; Bartlet et al 2018 ; Bhullar et al 2019 ; Gunputh et al 2020 ; Molina-Reyes et al 2020 ; Su et al 2018 ; G. Wang et al 2018 ) in addition to its inexpensive nature and large surface area (Moongraksathum et al 2019 ; Tiyek et al 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Electrospun nanofibers of polyvinylidene fluoride incorporated with titanium nanotubes for purifying air with bacterial contamination

Victor

Kugarajah

Bangaru

et al. 2021

Environ Sci Pollut Res

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Polyvinylidene fluoride (PVDF) blended with varying concentrations of titanium nanotubes (TNT) was electrospun to result in a nanocomposite filter media. Sandwich structures were obtained by depositing the electrospun fibers between polypropylene (PP) nonwoven sheets. The synthesized tubular TNT was confirmed for its morphology through a transmission electron microscope (TEM). The prepared filter media was analyzed through a scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). The effectiveness of the filter media was evaluated through the zone of inhibition and antibacterial activity against E. coli and S. aureus. The Box-Behnken design is experimented with three-level variables, namely areal density of substrate (GSM), electrospinning time (hours), and concentration of TNT (wt%) for investigating the bacterial filtration efficiency through an Andersen sampler. Among other statistical tests (STATs), PVDF + 15 wt% TNT has a bacterial filtration efficiency of 99.88% providing greater potentials upon application for clean air management. It can be noted that the future application of this formulation could be efficient filtration of other microbes and could be used in facemasks to industrial-scale air filters. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s11356-021-13202-3.

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Section: Introductionmentioning

confidence: 99%

Electrospun nanofibers of polyvinylidene fluoride incorporated with titanium nanotubes for purifying air with bacterial contamination

Victor

Kugarajah

Bangaru

et al. 2021

Environ Sci Pollut Res

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Section: Resultsmentioning

confidence: 99%

“…These results could be explained by the ROS generation, which oxidize the E coli membrane, disrupting of enzymatic activity and other vital structures, including chromosomal DNA, inducing cell destruction as reported previously. [55][56][57][58] Figure 10 shows the inactivation of E coli over the time using different NPs and concentrations. It was observed that using different amounts of photocatalyst used to inactivate the E coli cells affected the inactivation efficiency.…”

Section: E Coli Inactivationmentioning

confidence: 99%

Hydroxyl Radical Generation by Recyclable Photocatalytic Fe₃O₄/ZnO Nanoparticles for Water Disinfection

Máynez-Navarro

Méndez‐Rojas

Flores-Cervantes

et al. 2020

Air, Soil and Water Research

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Advanced oxidation processes based on photocatalytic generation of •OH radicals have emerged as promising technologies for the removal of recalcitrant pollutants in water. However, their poor recyclability has reduced their potential large-scale application. Herein, a Fe3O4-embedded ZnO system has been prepared and its photocatalytic •OH radicals activity was evaluated by monitoring the photo-assisted bleaching of p-nitrosodimethylaniline ( pNDA). Water disinfection performance was determined by measuring Escherichia coli inactivation under different conditions. Bleaching of nearly 80% of the initial pNDA concentration after just 120 minutes under UV365nm irradiation was determined. Bacterial inactivation at different concentrations (0.1, 1.0, and 5.0 mg mL−1) of the Fe3O4/ZnO nanocomposite was determined, finding that the best performance was obtained at 0.1 mg mL−1 (90%) just after the first 30 minutes under UV irradiation. The materials are easily magnetically recovered and their performance evaluated after 3 consecutive cycles of reuse. These magnetic and photoactive nanocomposites showed improved performance and could be used for wastewater treatment or disinfection processes of water.

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“…ROS damages bacterial cells, DNA chains, and other cellular structures through oxidative stress. Therefore, the use of TiO 2 NPs has been directed towards water disinfection, food packaging in addition to their known use as a UV filter to prevent skin cancer [114]. Lopez de Dicastillo et al (2019) developed hollow TiO 2 nanotubes and nanospheres with high antimicrobial activity through the combination of electrospinning and atomic layer deposition techniques [38,39].…”

Section: Types Of Metal-based Antimicrobial Nanoparticlesmentioning

confidence: 99%

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

Correa

Martínez

Vidal

et al. 2020

Beilstein J. Nanotechnol.

104

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The investigation of novel nanoparticles with antimicrobial activity has grown in recent years due to the increased incidence of nosocomial infections occurring during hospitalization and food poisoning derived from foodborne pathogens. Antimicrobial agents are necessary in various fields in which biological contamination occurs. For example, in food packaging they are used to control food contamination by microbes, in the medical field the microbial agents are important for reducing the risk of contamination in invasive and routine interventions, and in the textile industry, they can limit the growth of microorganisms due to sweat. The combination of nanotechnology with materials that have an intrinsic antimicrobial activity can result in the development of novel antimicrobial substances. Specifically, metal-based nanoparticles have attracted much interest due to their broad effectiveness against pathogenic microorganisms due to their high surface area and high reactivity. The aim of this review was to explore the state-of-the-art in metal-based nanoparticles, focusing on their synthesis methods, types, and their antimicrobial action. Different techniques used to synthesize metal-based nanoparticles were discussed, including chemical and physical methods and “green synthesis” methods that are free of chemical agents. Although the most studied nanoparticles with antimicrobial properties are metallic or metal-oxide nanoparticles, other types of nanoparticles, such as superparamagnetic iron-oxide nanoparticles and silica-releasing systems also exhibit antimicrobial properties. Finally, since the quantification and understanding of the antimicrobial action of metal-based nanoparticles are key topics, several methods for evaluating in vitro antimicrobial activity and the most common antimicrobial mechanisms (e.g., cell damage and changes in the expression of metabolic genes) were discussed in this review.

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Study on the photocatalytic activity of titanium dioxide nanostructures: Nanoparticles, nanotubes and ultra-thin films

Cited by 38 publications

References 30 publications

Electrospun nanofibers of polyvinylidene fluoride incorporated with titanium nanotubes for purifying air with bacterial contamination

Electrospun nanofibers of polyvinylidene fluoride incorporated with titanium nanotubes for purifying air with bacterial contamination

Hydroxyl Radical Generation by Recyclable Photocatalytic Fe₃O₄/ZnO Nanoparticles for Water Disinfection

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

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Study on the photocatalytic activity of titanium dioxide nanostructures: Nanoparticles, nanotubes and ultra-thin films

Cited by 38 publications

References 30 publications

Electrospun nanofibers of polyvinylidene fluoride incorporated with titanium nanotubes for purifying air with bacterial contamination

Electrospun nanofibers of polyvinylidene fluoride incorporated with titanium nanotubes for purifying air with bacterial contamination

Hydroxyl Radical Generation by Recyclable Photocatalytic Fe3O4/ZnO Nanoparticles for Water Disinfection

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

Contact Info

Product

Resources

About

Hydroxyl Radical Generation by Recyclable Photocatalytic Fe₃O₄/ZnO Nanoparticles for Water Disinfection