Photocatalytic TiO2–RGO/nylon-6 spider-wave-like nano-nets via electrospinning and hydrothermal treatment

Pant, Hem Raj; Pant, Bishweshwar; Pokharel, Pashupati; Kim, Han Joo; Tijing, Leonard D.; Park, Chan Hee; Lee, Dai Soo; Kim, Hee Young; Kim, Cheol Sang

doi:10.1016/j.memsci.2012.11.025

Cited by 108 publications

(40 citation statements)

References 40 publications

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“…The presence of TiO2 only at the surface of the nanofibers resulted thus, as expected, in a higher degradation rate. Comparing the MB decoloring results to literature, although not always straightforward due to various testing conditions used, it can be stated that both inline and post-functionalized PA 6 membranes are in line with the results of Daels et al [23] and even better than results obtained by Pant et al [39] and Kasanen et al [40]. A clear increase in isoproturon removal was seen upon functionalization with TiO2 for both PA 6 and silica nanofibrous membranes (Table 3).…”

Section: Photocatalytic Behavior Of Tio2 Functionalized Membranessupporting

confidence: 84%

TiO2 functionalized nanofibrous membranes for removal of organic (micro)pollutants from water

Geltmeyer

Teixido

Meire

et al. 2017

Separation and Purification Technology

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Abbreviations 1 1 PA 6: polyamide 6, MB: Methylene Blue, IL: inline, DC: dip-coating, H: hydrophilic 2 ABSTRACT Titania has already proven its added value for air and water treatment. The higher the surface-to-volume area, the better the performance of the TiO2 photocatalyst. These nanoparticles are typically applied in a slurry form. The use of titania nanoparticles in suspension has, however, multiple disadvantages such as a high turbidity and complex recovery of the photocatalyst after use. Therefore, immobilization of titania nanoparticles on a porous support such as a nanofibrous membrane, can be highly valuable for water treatment. These TiO2 functionalized nanofibrous membranes may be used not only in a membrane separation reactor, but also in a contact reactor. In this study, TiO2 nanoparticles were immobilized on both polymer (polyamide 6) and ceramic (silica) nanofibrous membranes. Polymer nanofibers are chosen as they are the state-of-the-art material, silica nanofibers on the contrary are less studied but show additional advantages due their excellent chemical and thermal stability and can thus offer a clear benefit for a wider range of applications. Two immobilization techniques were used, namely inline functionalization and dip-coating. Inline functionalization showed to be the preferred method for polyamide 6 nanofibrous membranes, dip-coating for silica nanofibrous membranes. Complete degradation of isoproturon, an actual concern in water treatment, is shown. Even the widely available commercial TiO2 nanoparticles allowed for a complete isoproturon removal as the result of a correct immobilization process on nanofibrous materials. This clearly opens up the high value of TiO2 functionalized nanofibrous membranes for organic (micro)pollutants removal.

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Section: Photocatalytic Behavior Of Tio2 Functionalized Membranessupporting

confidence: 84%

TiO2 functionalized nanofibrous membranes for removal of organic (micro)pollutants from water

Geltmeyer

Teixido

Meire

et al. 2017

Separation and Purification Technology

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“…In this technique, it is quite applicable to fabricate NF from various kinds of polymers, polymer blends, sol-gels and composites (Greiner and Wendorff, 2007;Ramakrishna et al, 2005;Wendorff et al, 2012). The NF obtained by electrospinning exhibit unique properties such as; small pore sizes, high pore density, large surface-to-volume ratio and design flexibility for particular physical and chemical functionalization (Aussawasathien et al, 2008;Greiner and Wendorff, 2007;Li and Xia, 2004;Pant et al, 2013;Ramakrishna et al, 2005Ramakrishna et al, , 2006Wendorff et al, 2012). Owing to their remarkable properties, electrospun NF and their nanowebs are especially promising candidates to be used in membranes/filters and environmental applications (Aluigi et al, 2014;Aussawasathien et al, 2008;Pant et al, 2013;Uyar et al, 2010a;Wang et al, 2013;Xie et al, 2008;Yoon et al, 2008;Pant et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Molecular entrapment of volatile organic compounds (VOCs) by electrospun cyclodextrin nanofibers

et al. 2016

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In this paper, we reported the molecular entrapment performance of hydroxypropyl-beta-cyclodextrin (HPβCD) and hydroxypropyl-gamma-cyclodextrin (HPγCD) electrospun nanofibers (NF) for two common volatile organic compounds (VOCs); aniline and benzene. The encapsulation efficiency of CD samples were investigated depending on the various factors such as; CD form (NF and powder), electrospinning solvent (DMF and water), CD (HPβCD and HPγCD) and VOCs (aniline and benzene) types. BET analysis indicated that, electrospun CD NF have higher surface area compared to their powder form. In addition DMA measurement provided information about the mechanical properties of CD NF. The encapsulation capability of CD NF and CD powder was investigated by 1H-NMR and HPLC techniques. The observed results suggested that, CD NF can entrap higher amount of VOCs from surroundings compared to their powder forms. Besides, molecular entrapment efficiency of CD NF also depends on CD, solvent and VOCs types. The inclusion complexation between CD and VOCs was determined by using TGA technique, from the higher decomposition temperature of VOCs. Finally, our results were fortified by the modeling studies which indicated the complexation efficiency variations between CD and VOC types. Here, the inclusion complexation ability of CD molecules was combined with very high surface area and versatile features of CD NF. So these findings revealed that, electrospun CD NF can serve as useful filtering material for air filtration purposes due to their molecular entrapment capability of VOCs. © 2015 Elsevier Ltd

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“…However, the photocatalytic activity of TiO 2 is limited by the fast recombination of photogenerated carriers and its poor solar efficiency. Therefore, TiO 2 has been modified through either doping or coupling with another semiconductor to produce a visible light sensitive catalyst [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation and antibacterial investigation of nano synthesized Ag₃VO₄particles @PAN nanofibers

Saud¹,

Ghouri²,

Pant³

et al. 2016

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Well-dispersed Ag 3 VO 4 nanoparticles @polyacrylonitrile (PAN) nanofibers were synthesized by an easily controlled, template-free method as a photo-catalyst for the degradation of methylene blue. Their structural, optical, and photocatalytic properties have been studied by X-ray diffraction, transmission electron microscopy, field-emission scanning electron microscopy equipped with rapid energy dispersive analysis of X-ray, photoluminescence, and ultraviolet-visible spectroscopy. The characterization procedures revealed that the obtained material is PAN nanofibers decorated by Ag 3 VO 4 nanoparticles. Photocatalytic degradation of methylene blue investigated in an aqueous solution under irradiation showed 99% degradation of the dye within 75 min. Finally, the antibacterial performance of Ag 3 VO 4 nanoparticles @PAN composite nanofibers was experimentally verified by the destruction of Escherichia coli. These results suggest that the developed inexpensive and functional nanomaterials can serve as a non-precious catalyst for environmental applications.

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Photocatalytic TiO2–RGO/nylon-6 spider-wave-like nano-nets via electrospinning and hydrothermal treatment

Cited by 108 publications

References 40 publications

TiO2 functionalized nanofibrous membranes for removal of organic (micro)pollutants from water

TiO2 functionalized nanofibrous membranes for removal of organic (micro)pollutants from water

Molecular entrapment of volatile organic compounds (VOCs) by electrospun cyclodextrin nanofibers

Photocatalytic degradation and antibacterial investigation of nano synthesized Ag₃VO₄particles @PAN nanofibers

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Photocatalytic TiO2–RGO/nylon-6 spider-wave-like nano-nets via electrospinning and hydrothermal treatment

Cited by 108 publications

References 40 publications

TiO2 functionalized nanofibrous membranes for removal of organic (micro)pollutants from water

TiO2 functionalized nanofibrous membranes for removal of organic (micro)pollutants from water

Molecular entrapment of volatile organic compounds (VOCs) by electrospun cyclodextrin nanofibers

Photocatalytic degradation and antibacterial investigation of nano synthesized Ag3VO4particles @PAN nanofibers

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Photocatalytic degradation and antibacterial investigation of nano synthesized Ag₃VO₄particles @PAN nanofibers