Fabrication of PVA/graphene oxide/TiO2 composite nanofibers through electrospinning and interface sol–gel reaction: Effect of graphene oxide on PVA nanofibers and growth of TiO2

Wang, Bo; Chen, Zhimin; Zhang, Jianan; Cao, Jingjing; Wang, Shuxia; Tian, Qiuge; Gao, Ming; Xu, Qun

doi:10.1016/j.colsurfa.2014.06.006

Cited by 61 publications

(29 citation statements)

References 40 publications

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“…The XRD spectra of PAN/PVA beads, PPT beads, and MB loaded PPT beads are displayed in Figure 4. For the XRD pattern of the three materials, the strong characteristic diffraction peaks at 2θ = 18.5 o (101) are related to crystalline PVA in the three samples, 48 which indicate the steady existence of…”

Section: Xrdmentioning

confidence: 97%

Encapsulating TiO2 into Polyvinyl Alcohol Coated Polyacrylonitrile Composite Beads for the Effective Removal of Methylene Blue

Han

Jin

Wang

et al. 2018

J. Braz. Chem. Soc.

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In this work, novel nanocomposite beads based on polyvinyl alcohol (PVA) coated polyacrylonitrile (PAN) with encapsulation of TiO 2 nanoparticles (PPT) were developed successfully via a novel green synthetic method and its methylene blue (MB) removal ability by adsorption was also investigated. As-prepared nanocomposite beads were characterized by different techniques such as Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). TiO 2 nanoparticles were encapsulated into the composite beads to endow the composite beads with photocatalytic ability and enhance its adsorption capacity for MB. Batch experiments with several variables such as TiO 2 nanoparticle content, pH of the solution, contact time and initial MB concentration were carried out. The adsorption kinetic study revealed that the MB adsorption process agreed well with pseudo-second order model and showed 3-stage intraparticle diffusion model. The adsorption isotherm study indicated that the MB adsorption process could also be better described by Langmuir isotherm model. According to Langmuir isotherm equation, the maximum adsorption capacity and removal rate for MB was 242.13 mg g-1 and 98.4%, respectively. Moreover, the stability and reusability of as-prepared PPT beads were further explored and results demonstrated that PPT could be reused at least five times with negligible loss of sorption capacity and removal rate. Therefore, PPT is expected to be a potential candidate for effluents treatment.

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Section: Xrdmentioning

confidence: 97%

Encapsulating TiO2 into Polyvinyl Alcohol Coated Polyacrylonitrile Composite Beads for the Effective Removal of Methylene Blue

Han

Jin

Wang

et al. 2018

J. Braz. Chem. Soc.

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“…This is conceivably due to the effects of the GRHA themselves as early as in the electrospinning process, where the GRHA enhanced the conductivity of the electrospinning solution, producing NF with smaller diameters (will be explained in Sect. 3.4) [21,22]. Sirc et al [23] reported that the average fiber diameters correlated with the SSA of the NF, in which NF with a smaller…”

Section: Porous Structure Properties and Nitrogen Adsorption Isothermsmentioning

confidence: 98%

Activated‐Carbon Nanofibers/Graphene Nanocomposites and Their Adsorption Performance Towards Carbon Dioxide

Othman

2020

Chem Eng & Technol

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Activated‐carbon nanofibers (ACNFs) provide a relatively new, modified structure of carbon‐based adsorbents that have the ability to adsorb carbon dioxide due to their high specific surface area, wide distribution of porous structures, and high volume of active sites. In this study, cost‐effective agricultural waste‐based graphene synthesized from rice husk ashes was used as additive to enhance the ACNF properties. ACNF/graphene (gACNF) is still a relatively unexplored adsorbent. The resultant gACNF exhibited better thermal stability properties, with higher yield, larger specific surface area, and higher micropore volume. These properties are the main factors contributing to their enhanced adsorption performance towards CO2.

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“…Poly(vinyl alcohol) (PVA) is a synthetic polymer suitable for use in the production of nanofibros mats that have a wide range of applications since PVA is biodegradable, non‐toxic, biocompatible, as well as mechanically strong and flexible for further modification . However, the intrinsic water‐soluble nature of PVA restricts its applications under humid conditions.…”

Section: Introductionmentioning

confidence: 99%

Crosslinking assisted fabrication of ultrafine poly(vinyl alcohol)/functionalized graphene electrospun nanofibers for crystal violet adsorption

Chailek

Daranarong

Punyodom

et al. 2018

J of Applied Polymer Sci

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This article reports the fabrication of water-stable electrospun mats made from water-soluble poly(vinyl alcohol) and comprising ultrafine nanofibers for a high surface area to volume ratio as required for the adsorption of crystal violet. Acid-catalyzed crosslinking is uniquely demonstrated as a facile strategy to improve water stability and, just as importantly, fine-tune the nanofiber size of the electrospun mats. Amine-functionalized graphene nanoplatelets are incorporated as an adsorption performance enhancer instead of the more widely reported graphene oxide. The functionalized graphene also facilitates fabrication of the composite electrospun mats by direct mixing of the water-dispersible graphene with the aqueous polymer solution. The enhanced adsorption performance of the polymer nanocomposite mats is explained in detail at the molecular level, while the adsorption mechanism is supported by adsorption isotherm and related kinetic data. Moreover, the adsorbent mats can be removed from the water after use with the mat integrity still maintained.

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Fabrication of PVA/graphene oxide/TiO2 composite nanofibers through electrospinning and interface sol–gel reaction: Effect of graphene oxide on PVA nanofibers and growth of TiO2

Cited by 61 publications

References 40 publications

Encapsulating TiO2 into Polyvinyl Alcohol Coated Polyacrylonitrile Composite Beads for the Effective Removal of Methylene Blue

Encapsulating TiO2 into Polyvinyl Alcohol Coated Polyacrylonitrile Composite Beads for the Effective Removal of Methylene Blue

Activated‐Carbon Nanofibers/Graphene Nanocomposites and Their Adsorption Performance Towards Carbon Dioxide

Crosslinking assisted fabrication of ultrafine poly(vinyl alcohol)/functionalized graphene electrospun nanofibers for crystal violet adsorption

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