Green Synthesis of ZnO Nanoparticles by an Alginate Mediated Ion-Exchange Process and a case study for Photocatalysis of Methylene Blue Dye

Keong, Choo Cheng; Vivek, Yamini Sunitha; Salamatinia, Babak; Horri, Bahman Amini

doi:10.1088/1742-6596/829/1/012014

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…A similar technique, extrusion dripping is a new approach to form spherical monodisperse ZnO nanoparticles, where the working precursor solution is controllable dripped from a needle into a stabilizing polymer solution. After washing, the powders are calcinated at around 500 • C [124]. Another known technique for the preparation of nanopowders of ZnO is mechanochemical synthesis.…”

Section: Nanostructures and Nanoparticlesmentioning

confidence: 99%

ZnO as a Functional Material, a Review

2019

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Zinc oxide (ZnO) is a fascinating wide band gap semiconductor material with many properties that make it widely studied in the material science, physics, chemistry, biochemistry, and solid-state electronics communities. Its transparency, possibility of bandgap engineering, the possibility to dope it into high electron concentrations, or with many transition or rare earth metals, as well as the many structures it can form, all explain the intensive interest and broad applications. This review aims to showcase ZnO as a very versatile material lending itself both to bottom-up and top-down fabrication, with a focus on the many devices it enables, based on epitaxial structures, thin films, thick films, and nanostructures, but also with a significant number of unresolved issues, such as the challenge of efficient p-type doping. The aim of this article is to provide a wide-ranging cross-section of the current state of ZnO structures and technologies, with the main development directions underlined, serving as an introduction, a reference, and an inspiration for future research.

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Section: Nanostructures and Nanoparticlesmentioning

confidence: 99%

ZnO as a Functional Material, a Review

2019

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“…Whereas for samples prepared through extrusion dripping, Na-ALG solution was dripped into excess CuCl2 solution to form Cu-ALG beads using a 20 mm diameter syringe pump at a flow rate of 1.55 mL/min and a dripping height of 10 -15 cm. Throughout the ion exchange reaction process, a magnetic stirrer was used to ensure that homogeneous reactions occur at desired rates, as well as to reduce the strong centrifugal forces formed in the copper salt solution and avoid deformation of the spherical Na-ALG bead shape [9,10]. The Cu-ALG beads formed in the CuCl2 solution were left overnight to improve homogeneity and allow for complete ion exchange reaction.…”

Section: Methodsmentioning

confidence: 99%

Green Synthesis and Characterization of High-Purity Monodispersed Cupric Oxide (CuO) Nanopowder

Foo

Shahcheragh

et al. 2019

KEM

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In this study, high quality monodispersed nanocrystalline cupric oxide (CuO) nanopowder was prepared through novel sol-gel green synthesis method, assisted by sodium alginate (Na-ALG) as the green ionic exchange material. The morphology and structural properties of CuO nanopowders synthesized with and without the incorporation of extrusion dripping, at different Na-ALG solution concentrations and calcination temperatures, were studied using thermalgravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX) and Raman spectroscopy. Optimum synthesis conditions were identified, resulting in high-purity, monodispersed nanocrystalline CuO powder in the range of 9.92 – 12.4 nm, which could have a promising future in various applications.

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Single‐stage synthesis of electrospun polyurethane scaffold impregnated with zinc nitrate nanofibers for wound healing applications

Jaganathan

Mani²

2018

J of Applied Polymer Sci

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In this study, a wound dressing scaffold was developed based on polyurethane (PU, 9 wt %) incorporated with zinc nitrate nanofibers (9 wt %) using an electrospinning technique. The morphological studies revealed that the electrospun nanocomposites showed smaller fiber (568 ± 136.69 nm) and pore diameters (703 ± 60.76 nm) than the pure PU (fiber diameter 1159 ± 147.48 nm and pore diameter 1087 ± 62.51 nm). Energy-dispersive X-ray spectroscopy confirmed the presence of zinc nitrate in the PU matrix. The formation of hydrogen bonds and the enhanced weight residue found by Fourier transform infrared spectroscopy and thermogravimetric analysis revealed the interaction of PU with zinc nitrate. Moreover, the contact angle measurements revealed the hydrophilic nature of the electrospun nanocomposite (84 ± 4.041 ) compared to the control (100 ± 0.5774 ). Mechanical testing and atomic force microscopy showed an improvement in the tensile strength (15.98 MPa) and surface roughness (277 nm) of the fabricated nanocomposites compared to the PU membrane (tensile strength 7.12 MPa and surface roughness 216 nm). Further, incorporation of zinc nitrate into PU improved the blood compatibility, as demonstrated by the prolonged blood clotting time (APTT 188 ± 4 s and PT 102.7 ± 3.786 s) compared to the pure PU (APTT 147.7 ± 3.512 s and PT 84.67 ± 2.517 s), as revealed in coagulation assays. Moreover, the electrospun nanocomposites showed a low hemolytic index and enhanced fibroblast proliferation rates, as indicated in the hemolysis and cytocompatibility studies. The newly developed wound dressing displayed better physicochemical characteristics, prolonged blood clotting time, and enhanced fibroblast proliferation rates, indicating that it might be utilized as an alternate candidate for wound dressings.

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Green Synthesis of ZnO Nanoparticles by an Alginate Mediated Ion-Exchange Process and a case study for Photocatalysis of Methylene Blue Dye

Cited by 8 publications

References 19 publications

ZnO as a Functional Material, a Review

ZnO as a Functional Material, a Review

Green Synthesis and Characterization of High-Purity Monodispersed Cupric Oxide (CuO) Nanopowder

Single‐stage synthesis of electrospun polyurethane scaffold impregnated with zinc nitrate nanofibers for wound healing applications

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