A Practical Electrochemical Sensor for Atenolol Detection Based on a Graphene Oxide Composite Film Doped with Zinc Oxide Nanoparticles

2020 ◽  
Vol 5 (28) ◽  
pp. 8846-8852
Author(s):  
Ebru Mavioğlu Ayan ◽  
Şükriye Ulubay Karabiberoğlu ◽  
Zekerya Dursun
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Composite Film ◽  
Electrochemical Sensor ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Oxide Composite

Evaluation of the catalytic activity of graphene oxide and zinc oxide nanoparticles on the electrochemical sensing of T1R2-Rebaudioside A complex supported by in silico methods

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Krishna Bisetty ◽  
Suvardhan Kanchi ◽  
Phathisanani Hloma
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Catalytic Activity ◽  
Zinc Oxide Nanoparticles ◽  
Taste Receptor ◽  
Computational Modelling ◽  
Electrochemical Sensing ◽  
Oxide Nanoparticles ◽  
Rebaudioside A ◽  
Pt Electrode

Abstract Herein, we report on the performance of graphene oxide (GOx) and zinc oxide nanoparticles (ZnONPs) on a platinum (Pt) electrode, immobilized with the human T1R2 sweet taste receptor subunit for the detection of rebaudioside A (Reb-A). The characterization studies performed in this work confirmed the thin-layered structure of GOx and the polydispersed nature of ZnONPs. The elucidation of the mass loss observed by TGA demonstrates the stability of GOx. The cyclic voltammetry results for Pt/GOx revealed good catalytic activity over Pt/ZnONPs for adsorption of the T1R2-Reb-A complex. In addition, a series of computational modelling studies were carried out to better understand the surface adsorption phenomena of GOx and ZnONPs to mimic the layer-by-layer electrode modification strategies independently. The strongest interaction energy observed (−573 kcal mol−1) for the direct interaction of ZnONPs onto the Pt electrode surface, demonstrates a stronger adsorption in contrast to the GOx modified Pt electrode (−23 kcal mol−1). However, the overall results for the layered-nanocomposite revealed that the GOx (−256 kcal mol−1) were more strongly adsorbed in contrast to ZnONPs (−231 kcal mol−1) for the detection of the T1R2-ReB-A complex, demonstrating the reliability of our GOx electrode functionalization strategy. The results of this study can potentially be used to improve the design of rapid Reb-A sensors for the food and beverage industry.

Graphene oxide and zinc oxide decorated chitosan nanocomposite biofilms for packaging applications

2020 ◽  
Vol 40 (2) ◽  
pp. 152-157 ◽  
Author(s):  
Pınar Terzioglu ◽  
Yasin Altin ◽  
Ayse Kalemtas ◽  
Ayse Celik Bedeloglu
Keyword(s):  
Tensile Strength ◽  
Zinc Oxide ◽  
Graphene Oxide ◽  
Composite Film ◽  
Young’S Modulus ◽  
Mechanical Performance ◽  
Young's Modulus ◽  
Chitosan Film ◽  
Oxide Composite ◽  
Wide Range

AbstractRecently, due to sustainable development and environmental protection policies, there is increasing interest in the development of new biodegradable polymer-based multifunctional composites. Chitosan is one of the most remarkable and preferred biopolymers, which is environmentally friendly as well as renewable, biocompatible, and inexpensive. Though it has a wide range of potential applications, the major limitation of chitosan – the problem of poor mechanical performance – needs to be solved. In this work, graphene oxide was first produced and then used to manufacture a chitosan/graphene oxide/zinc oxide composite film through a casting method. The properties of the chitosan film and the chitosan/graphene oxide/zinc oxide composite film were investigated using Fourier transform infrared spectroscopy, mechanical, thermal gravimetric, and ultraviolet (UV)-visible spectroscopy analyses. The results showed that the incorporation of graphene oxide and zinc oxide into the chitosan matrix resulted in enhanced mechanical properties and thermal stability of chitosan biocomposite films. The graphene oxide- and zinc oxide-reinforced chitosan film showed 2527 MPa and 55.72 MPa of Young’s modulus and tensile strength, respectively, while neat chitosan showed only 1549 MPa and 37.91 MPa of Young’s modulus and tensile strength, respectively. Conversely, the addition of graphene oxide decreased the transmittance, notably in the UV region.

Crystalline quality assessment, photocurrent response and optical properties of reduced graphene oxide uniformly decorated zinc oxide nanoparticles based on the graphene oxide concentration

RSC Advances ◽  
2015 ◽  
Vol 5 (65) ◽  
pp. 53117-53128 ◽  
Author(s):  
Majid Azarang ◽  
Ahmad Shuhaimi ◽  
M. Sookhakian
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Sol Gel ◽  
Degree Of Crystallinity ◽  
Oxide Nanoparticles ◽  
One Pot ◽  
Natural Surfactant ◽  
Reduced Graphene

Zinc oxide nanoparticles–reduced graphene oxide composites with a high degree of crystallinity and high dispersity were successfully synthesized via a facile sol–gel one-pot method in a starch environment as a natural surfactant for the fabrication of solar cell devices.

scholarly journals Transparent Conductive Three-Layered Composite Films Based on Carbon Nanotubes with Improved Mechanical Stability

2014 ◽  
Vol 1659 ◽  
pp. 213-218
Author(s):  
Hans-Christoph Schwarz ◽  
Andreas M. Schneider ◽  
Stephen Klimke ◽  
Bibin T. Anto ◽  
Stefanie Eiden ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Graphene Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Mechanical Stability ◽  
Composite Coatings ◽  
Layered Composite ◽  
Conducting Layer ◽  
Oxide Nanoparticles ◽  
Transparent Conductor ◽  
Single Wall Nanotubes

ABSTRACTA layered composite coating material with favorable properties for application as a transparent conductor is presented. It is composed of layers of three nanoscopic materials, namely zinc oxide nanoparticles, single wall nanotubes, and graphene oxide nanosheets. The electrically conducting layer consists of single wall nanotubes (SWNTs). The layer of zinc oxide nanoparticles acts as a primer. It increases the adhesion and the stability of the films against mechanical stresses. The top layer of graphene oxide enhances the conductivity of such coatings. Such three-layer composite coatings show better conductivity (without compromising transparency) and improved mechanical stability compared to pure SWNT films. The processes used in the preparation of such coatings are easily scalable.

scholarly journals Expression of concern: Crystalline quality assessment, photocurrent response and optical properties of reduced graphene oxide uniformly decorated zinc oxide nanoparticles based on the graphene oxide concentration

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10346-10346
Author(s):  
Andrew Shore
Keyword(s):  
Zinc Oxide ◽  
Optical Properties ◽  
Graphene Oxide ◽  
Quality Assessment ◽  
Reduced Graphene Oxide ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Photocurrent Response ◽  
Reduced Graphene ◽  
Oxide Concentration

Expression of concern for ‘Crystalline quality assessment, photocurrent response and optical properties of reduced graphene oxide uniformly decorated zinc oxide nanoparticles based on the graphene oxide concentration’ by Majid Azarang et al., RSC Adv., 2015, 5, 53117–53128.

Sign in / Sign up

Export Citation Format

Share Document