Photocatalytic degradation of naphthalene using calcined Fe ZnO/ PVA nanofibers

Muthukumar, Harshiny; Chandrasekaran, Nivedhini Iswarya; Matheswaran, Manickam

doi:10.1016/j.chemosphere.2018.04.131

Cited by 49 publications

(22 citation statements)

References 49 publications

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“…The unmodified ZnO (67.9 m 2 g -1 ) and ZnO@ZnS (69.7 m 2 g -1 ) architectures offered a superior specific area to the Ag-decorated (48.9 m 2 g -1 ) and Ni-doped (33.5 m 2 g -1 ) ZnO micro/nanoferns due to the better dendritic definition of microleaves and reduced compactness. In spite of this, all the biomimetic-obtained photocatalysts revealed a higher specific area than most of the micro/nanometric ZnO-based photocatalysts, which was crucial to enhance photoremediation efficiency [22][23][24][25][26][27][28][29][30]. Therefore, fern-like ZnO-based photocatalysts may emerge as a more interesting architecture than simple microrods, nanorods or nanowires due to the (i) higher electron diffusion length; (ii) higher accessible specific surface area for pollutants and light; and (iii) higher capability to absorb light since this architecture due to enhanced light trapping in the fractal architec-ture and trapping efficiency on the angle of the incident light (in contrast to what has been observed for other morphologies) [22,23,43,56,57].…”

Section: Photocatalyst Synthesis and Characterizationmentioning

confidence: 99%

“…In addition, surface decoration with metal nanostructures can, on the one hand, improve the trapping of photogenerated carriers at the surface and, on the other hand, amplify light absorption by exploiting their localized surface plasmon resonance, thereby enabling enhanced photocatalytic efficiency with visible light. For example, Cdoped ZnO porous structures, Mg-doped ZnO nanoparticles, Fe-doped ZnO nanofibers, Eu-doped ZnO nanoparticles, and Er-Al co-doped nanoparticles showed enhanced photocatalytic performance towards various pollutants under visible light [28][29][30][31][32]. In addition, core@shell semiconductor heterojunctions have also recently been proven to enhance the charge separation of electron-hole pairs and, consequently, the photocatalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

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Highly active ZnO-based biomimetic fern-like microleaves for photocatalytic water decontamination using sunlight

Serrà

Zhang

Sepúlveda

et al. 2019

Applied Catalysis B: Environmental

108

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Section: Photocatalyst Synthesis and Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Highly active ZnO-based biomimetic fern-like microleaves for photocatalytic water decontamination using sunlight

Serrà

Zhang

Sepúlveda

et al. 2019

Applied Catalysis B: Environmental

108

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“…In the FT‐IR spectrum of chitosan a broad absorbance bands were observed at 3,330 cm −1 and two absorbance bands at 1,653 and 1,065 cm −1 corresponding to OH, NH, and ether functional groups, respectively 61 . PVA demonstrated characteristic absorbance bands at 3,330 cm −1 (OH stretching), 2,947 cm −1 (CH stretching), 1,710 cm −1 (CO stretching), 1,422 cm −1 (CH bending) and 1,092 cm −1 62 . For outer layer nanofibers, the FT‐IR spectrum contains the main characteristic absorbance bands of pure components, which confirms the presence of all polymers in the structure.…”

Section: Resultsmentioning

confidence: 99%

Preparation of multilayer electrospun nanofibrous scaffolds containing soluble eggshell membrane as potential dermal substitute

Amirsadeghi

Khorram

Hashemi

2021

J Biomedical Materials Res

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Electrospinning of natural and synthetic polymers has shown to be a great candidate for the fabrication of tissue engineering scaffolds due to their similarity to the nanofibrous structure of natural extracellular matrix (ECM). Moreover, the addition of ECM‐like proteins could enhance the biocompatibility of these scaffolds. In this study, soluble eggshell protein (SEP) was first extracted and synthesized from the raw eggshell membrane. The characteristics and biocompatibility of the extracted SEP were evaluated using attenuated total reflectance‐Fourier transform infrared (ATR‐FTIR) analysis and 3‐(4,5‐ dimethylthiazol‐2‐yl‐2,5‐diphenyltetrazolium bromide) (MTT) assay. For scaffolds fabrication, a three‐layer nanofibrous composite structure was produced using the electrospinning technique. The outer layers composed of polyvinyl alcohol, chitosan, and extracted SEP while the middle layer composed of polyethylene oxide, gelatin, and zinc oxide nanoparticles (ZnO‐NPs). For each layer, the electrospinning parameters were adjusted to form bead‐free fibers. To improve fibers' stability against body fluids, the produced fibers were crosslinked using glutaraldehyde vapor. Several techniques such as scanning electron microscopy (SEM), energy dispersive X‐ray, ATR‐FTIR, swelling, tensile test, in vitro biodegradation, and MTT assay were implemented to evaluate the physical, chemical, and biological characterization of the fabricated fibers. The results showed that crosslinked fibers have adequate stability in water, suitable mechanical properties, and promising water uptake capacity. The MTT results also revealed that SEP and ZnO‐NPs could increase scaffolds biocompatibility. Moreover, SEM photographs of cultured fibroblasts cells on the scaffolds showed that cells were well attached on the scaffolds and preserve their natural spindle shapes. Altogether, our findings demonstrated that the produced three‐layer composite scaffolds are potential candidates for skin tissue engineering.

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“…and 2910 cm -1 for the stretching vibration of -CH 2 group, 1242, 1088, 1023 and 945 cm -1 (C-O) stretching vibration, respectively [41,48,49]. On the other hand, for the PVA-Gel bers the band appears at 3290 cm -1 for the (-OH) group.…”

Section: Ft-ir Analysismentioning

confidence: 94%

Folic acid-containing nanofibers by simultaneous process for transdermal drug delivery: preparation, characterization, and in vitro biocompatibility

Parın

Aydemir

Taner

et al. 2020

Preprint

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Nanofibers with bioactive agents are good candidates for skin-care applications due to high spesific surface area, low density and highly porous structure. In this study, hydrophilic based bioactive nanofibers were produced via an electrospinning and electrospraying simultaneous process. Polyvinyl alcohol (PVA), polyvinyl alcohol-gelatin (PVA-Gel) and polyvinyl alcohol-alginate (PVA-Alg) polymers were used as the matrix material and folic acid (FA) particles were dispersed simultaneously on the surface of these hydrophilic nanofibers. The morphology of the nanofibers (NFs) was uniform and dispersed folic acid particles incorporated into the structure of nanofibers as confirmed by scanning electron microscopy (SEM). Thermal behavior, chemical structure of the composite nanofibers were analyzed/investigated by thermogravimetric analysis (TGA) and Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy (ATR-FTIR) which showed that no chemical bonding between vitamin and polymers. A controlled release of FA-loaded electrospun fibers were carried out by UV-Vis in vitro study within the 8 hour-period in artificial sweat solutions (acidic media, pH 5,44). The obtained PVA/FA, PVA-Gel/FA and PVA-Alg/FA fibers released 49.6 %, 69.55 % and 50.88 % of the sprayed FA in 8 h, indicating the influence of polymer matrix and polymer-drug interactions, on its release from the polymer matrix. Moreover, biocompatibility of all developed novel NFs was assessed by two different cytotoxicity tests,3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and neutral red uptake (NRU) assay in L929 cell lines. In all cases, it is clearly concluded that these new electrospun fibers had fast-release of the vitamin and the hybrid process is suitable for transdermal patch applications, especially for skin-care products. Moreover, it has been proposed nanofiber with folic acid as a patch may prevent the COVID-19. The results of cytotoxicity assays on L929 cell reveal that all prepared NFs have no or slight cell toxicity. PVA and PVA-Gel with/without FA nanofibers seems more biocompatible than PVA-Alg nanofibers.

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Photocatalytic degradation of naphthalene using calcined Fe ZnO/ PVA nanofibers

Cited by 49 publications

References 49 publications

Highly active ZnO-based biomimetic fern-like microleaves for photocatalytic water decontamination using sunlight

Highly active ZnO-based biomimetic fern-like microleaves for photocatalytic water decontamination using sunlight

Preparation of multilayer electrospun nanofibrous scaffolds containing soluble eggshell membrane as potential dermal substitute

Folic acid-containing nanofibers by simultaneous process for transdermal drug delivery: preparation, characterization, and in vitro biocompatibility

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