The Impact of Functionalization on the Stability, Work Function, and Photoluminescence of Reduced Graphene Oxide

ACS Nano ◽  
2013 ◽  
Vol 7 (2) ◽  
pp. 1638-1645 ◽  
Author(s):  
Priyank V. Kumar ◽  
Marco Bernardi ◽  
Jeffrey C. Grossman
Keyword(s):  
Graphene Oxide ◽  
Work Function ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
The Stability ◽  
The Impact

scholarly journals Amino Functionalization of Reduced Graphene Oxide/Tungsten Disulfide Hybrids and Their Bismaleimide Composites with Enhanced Mechanical Properties

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1199 ◽  
Author(s):  
Liulong Guo ◽  
Hongxia Yan ◽  
Zhengyan Chen ◽  
Qi Liu ◽  
Yuanbo Feng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Tungsten Disulfide ◽  
Amino Groups ◽  
Uniform Dispersion ◽  
Reduced Graphene ◽  
Suitable Amount ◽  
The Stability ◽  
The Impact

A novel graphene-based nanocomposite particles (NH2-rGO/WS2), composed of reduced graphene oxide (rGO) and tungsten disulfide (WS2) grafted with active amino groups (NH2-rGO/WS2), was successfully synthesized by an effective and facile method. NH2-rGO/WS2 nanoparticles were then used to fabricate new bismaleimide (BMI) composites (NH2-rGO/WS2/BMI) via a casting method. The results demonstrated that a suitable amount of NH2-rGO/WS2 nanoparticles significantly improved the mechanical properties of the BMI resin. When the loading of NH2-rGO/WS2 was only 0.6 wt %, the impact and flexural strength of the composites increased by 91.3% and 62.6%, respectively, compared to the neat BMI resin. Rare studies have reported such tremendous enhancements on the mechanical properties of the BMI resin with trace amounts of fillers. This is attributable to the unique layered structure of NH2-rGO/WS2 nanoparticles, fine interfacial adhesion, and uniform dispersion of NH2-rGO/WS2 in the BMI resin. Besides, the thermal gravimetrical analysis (TGA) revealed that the addition of NH2-rGO/WS2 could also improve the stability of the composites.

scholarly journals Supramolecular Structure of Polypropylene Fibers Extruded with Addition of Functionalized Reduced Graphene Oxide

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 910 ◽  
Author(s):  
Jan Broda ◽  
Janusz Fabia ◽  
Marcin Bączek ◽  
Czesław Ślusarczyk
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Supramolecular Structure ◽  
Nucleating Agent ◽  
Polypropylene Fibers ◽  
Fiber Structure ◽  
X Ray Scattering ◽  
Reduced Graphene ◽  
The Impact ◽  
Spun Fibers

An effective β-nucleating agent for polypropylene crystallization was obtained by the functionalization of reduced graphene oxide with calcium pimelate. The nucleating ability of the modified reduced graphene oxide (rGO-CP) was confirmed during non-isothermal crystallization. In further examinations, the rGO-CP was used as an additive to modify polypropylene fibers. The fibers were extruded in laboratory conditions. Gravity spun fibers containing three different concentrations of the rGO-CP and fibers taken at three different velocities were obtained. The supramolecular structure of the fibers was examined by means of calorimetric and X-Ray Scattering methods (DSC, WAXS, and SAXS). The considerable amount of β-iPP was obtained only in the gravity spun fibers. In the fibers extruded at higher velocities, the diminishing impact of the additive on the fibers structure was revealed. The changes observed in the fiber structure in connection with the impact of the additive on polypropylene crystallization was discussed.

scholarly journals Manufacturing and Evaluation of Mechanical, Morphological, and Thermal Properties of Reduced Graphene Oxide-Reinforced Expanded Polystyrene (EPS) Nanocomposites

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Tomasz Rydzkowski ◽  
Kazimierz Reszka ◽  
Mieczysław Szczypiński ◽  
Michał Marek Szczypiński ◽  
Elżbieta Kopczyńska ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Carbon Nanoparticles ◽  
Bending Strength ◽  
Expanded Polystyrene ◽  
Thermal Conductivity Ratio ◽  
Reduced Graphene ◽  
Similar Density ◽  
The Impact

The aim of the present study is to examine the effect of the addition of carbon nanoparticles (σsp2 hybridization) on the mechanical properties of foamed polystyrene. In this work, we focus on the study of the impact of compressive stress, tensile strength, bending strength, thermal conductivity ratio (λ), and water absorption of expanded polystyrene (EPS) reinforced with reduced graphene oxide and graphite. The results were compared with pristine EPS and reduced graphene oxide-reinforced EPS. All the nanocomposite specimens used for testing had a similar density. The study reveals that the nanocomposites exhibit different thermal conductivities and mechanical properties in comparison to pristine EPS. The enhancement in the properties of the nanocomposite could be associated with a more extensive structure of elementary cells of expanded polystyrene granules.

Work Function Tuning of Reduced Graphene Oxide Thin Films

2015 ◽  
Vol 120 (1) ◽  
pp. 281-290 ◽  
Author(s):  
Lamprini Sygellou ◽  
Georgios Paterakis ◽  
Costas Galiotis ◽  
Dimitrios Tasis
Keyword(s):  
Thin Films ◽  
Graphene Oxide ◽  
Work Function ◽  
Reduced Graphene Oxide ◽  
Oxide Thin Films ◽  
Reduced Graphene ◽  
Work Function Tuning

Incorporation of PEDOT:PSS into SnO2/reduced graphene oxide nanocomposite anodes for lithium-ion batteries to achieve ultra-high capacity and cyclic stability

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 13964-13971 ◽  
Author(s):  
Md. Selim Arif Sher Shah ◽  
Shoaib Muhammad ◽  
Jong Hyeok Park ◽  
Won-Sub Yoon ◽  
Pil J. Yoo
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Reduced Graphene Oxide ◽  
Polymer Matrix ◽  
High Capacity ◽  
Lithium Ion ◽  
Cyclic Stability ◽  
Reduced Graphene ◽  
The Stability

A conducting polymer matrix of PEDOT:PSS is incorporated into SnO2/reduced graphene oxide composite for increasing the stability of lithium-ion battery anodes.

Effect of the defect densities of reduced graphene oxide network on the stability of lithium-metal anodes

2021 ◽  
Vol 27 ◽  
pp. 102276
Author(s):  
Huan Zhang ◽  
Meiling Huang ◽  
Jie Song ◽  
Daming Sun ◽  
Yingjun Qiao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Lithium Metal ◽  
Reduced Graphene ◽  
Lithium Metal Anodes ◽  
The Stability ◽  
Defect Densities ◽  
Metal Anodes

scholarly journals Fabrication of a Sensitive and Stable NiO Uric Acid Biosensor Using Ag Nanowires and Reduced Graphene Oxide

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4696
Author(s):  
Jung-Chuan Chou ◽  
Tsu-Yang Lai ◽  
Yu-Hsun Nien ◽  
Chih-Hsien Lai ◽  
Po-Yu Kuo ◽  
...  
Keyword(s):  
Uric Acid ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Average Sensitivity ◽  
Radio Frequency Sputtering ◽  
Reduced Graphene ◽  
Ag Nanowires ◽  
The Stability ◽  
Uric Acid Biosensor ◽  
T System

How to detect uric acid is an important issue. For the purpose of preparing a potentiometric uric acid biosensor, this research used nickel oxide (NiO) as the sensing film to deposit it onto the substrate by radio frequency sputtering, then modified it with reduced graphene oxide (rGO) and silver (Ag) nanowires. Reduced graphene oxide (rGO) not only has excellent electrical conductivity, but also can make the surface of the film have a larger surface area, while AgNWs have also been proven to improve catalytic activity; hence, these two materials were chosen as sensor modifiers. Finally, the stability and the various characteristics of the uric acid biosensor were investigated using a voltage–time (V–T) system. The results showed that the AgNW–uricase/rGO/NiO uric acid biosensor has average sensitivity with 4.66 mV/(mg/L). In addition, the sensor has good stability.

Tuning the reactivity of Ru nanoparticles by defect engineering of the reduced graphene oxide support

RSC Advances ◽  
2014 ◽  
Vol 4 (42) ◽  
pp. 22230-22240 ◽  
Author(s):  
Xin Liu ◽  
Yanhui Sui ◽  
Changgong Meng ◽  
Yu Han
Keyword(s):  
Electronic Structure ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Local Defect ◽  
Defect Structures ◽  
Defect Engineering ◽  
Ru Nanoparticles ◽  
Oxide Support ◽  
Reduced Graphene ◽  
The Stability

The local defect structures on rGO determine the stability, the electronic structure and the reactivity of the Ru/rGO composites.

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