Two-step fabrication of ZnO-PVP composites with tunable visible emissions

Agulto, Verdad C.; Empizo, Melvin John F.; Kawano, Kimiko; Minami, Yuki; Yamanoi, Kohei; Sarukura, Nobuhiko; Yago, Allan Christopher C.; Sarmago, Roland V.

doi:10.1016/j.optmat.2017.12.048

Cited by 20 publications

(5 citation statements)

References 33 publications

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“…Absorption peaks at 2932, 2245 and 1450 cm −1 are belonging to the PAN component 35,36 . The CO bond of the PVP is represented by the absorption peak at 1674 cm −1 36,38,39 . The characteristic absorption peaks of the SBMA located at 1728, 1450, 1170 and 1042 cm −1 are also observed due to the absorption of SBMA hydrogel on the fiber surface of the interlayer.…”

Section: Resultsmentioning

confidence: 94%

Electrospinning janus membranes for on‐demand oil/water collection and emulsion separation

Meng,

Xu,

et al. 2024

Journal of Polymer Science

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Oily water pollution has become one of the most serious water environment issue in worldwide. Membrane that can effectively and efficiently remove different oil pollutions from the complex water environment is still urgently needed. Herein, a Janus membrane with opposite wettability that can separate heavy oil–water and light oil–water mixtures on demand was prepared by using a simple sequential electrospinning and chemical crosslinking method. The membrane could remove oil or water under gravity with a high oil/water flux and excellent separation efficiency. Moreover, the membrane could separate different kinds of oil‐in‐water emulsions under gravity with a high flux of 1184 L m−2 h−1 and a tiny flux loss of 4.4% after a 10‐cycle separation. Owing to its excellent anti‐pollution properties the flux recovery rate of the membrane was still higher than 80% after 150 min of emulsion separation. Additionally, the membrane also displayed the ability to transport liquid unidirectionally, giving whom the capabilities to collect oil underwater or water underoil. This research provides a novel and simple method for producing membranes for a variety of separation applications.

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Section: Resultsmentioning

confidence: 94%

Electrospinning janus membranes for on‐demand oil/water collection and emulsion separation

Meng,

Xu,

et al. 2024

Journal of Polymer Science

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“…Polyvinylpyrrolidone (PVP) is a water soluble, biocompatible, non‐toxic, amphiphilic and non‐ionic polymer that is employed as a carrier of solid dispersions to enhance the dissolution rate, while repressing recrystallisation (Agulto et al ., 2018). PVP has a very strong hydrophilic and hydrophobic component and electronegative oxygen (Koczkur et al, 2015).…”

Section: Photocatalysis Technique For the Treatment Wastewatermentioning

confidence: 99%

“…8. PVP with film‐forming characteristics is the most suitable encapsulating agent of ZnO particles due to its admirable surface passivation and adsorption ability (Agulto et al ., 2018). The aggregation of NPs is hindered by the repulsive forces that emanate from the PVP hydrophobic carbon chains which makes it a great stabilizer.…”

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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“…This may be that the PAN we use is an industrial product, and there may be other copolymers containing C O functional groups. After PVP is incorporated, characteristic peaks at 1663 and 1289 cm −1 appear, corresponding to the C O (1663 cm −1 ) and C N (1289 cm −1 ) bonds that belong to PVP, [30][31][32] suggesting that PVP has successfully blended into the PAN system.…”

Section: Surfaces Properties Of the Pvp/pan Membranesmentioning

confidence: 99%

An oil‐contamination‐resistant PVP/PAN electrospinning membrane for high‐efficient oil–water mixture and emulsion separation

Meng

Gao

et al. 2020

J of Applied Polymer Sci

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Oil-water separation is an urgent issue due to the frequently occurred oil leakages and increasing discharge of oily wastewater. The pollutional and wastewater can not only damage the environment, but endanger human health. Owing to the small particle size of the oil contamination, it is still a challenge for the separation of oil-water emulsion. In this study, we developed a facile strategy to prepare a hydrophilic polyvinylpyrrolidone/polyacrylonitrile (PVP/PAN) nanofibrous membrane for oil-water mixture and emulsion separation. The lowest water contact angle on the membrane surface can achieve 16.7 , thus the membranes can effectively resist the oil contamination on them. Moreover, the membrane can efficiently separate oil-water mixtures and emulsion by gravity. In addition, it can separate oil-water mixtures in harsh conditions (pH = 1 and 14). Membranes prepared in this work would hold a great potential in the practical use of water treatment and environmental industry.

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Two-step fabrication of ZnO-PVP composites with tunable visible emissions

Cited by 20 publications

References 33 publications

Electrospinning janus membranes for on‐demand oil/water collection and emulsion separation

Electrospinning janus membranes for on‐demand oil/water collection and emulsion separation

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

An oil‐contamination‐resistant PVP/PAN electrospinning membrane for high‐efficient oil–water mixture and emulsion separation

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