Synthesis and Characterization of Reduced Graphene Oxide Film as Electronic Material

Large area graphene oxide (GO) film was prepared by vacuum filtration method through a membrane with a pore size of 25 nm, using GO sheets suspension as raw materials. The film was thermal treated in Ar/H2 atmosphere at 600°C to make the film electrical conductive. The structure and morphology of the obtained film were investigated by XRD, Raman, FT-IR and SEM. Results showed that most oxygen-containing functional groups in GO film were reduced during the thermal annealing process. The obtained reduced film showed excellent electrical conductivity and the average sheet resistance of the reduced film was 11.3 Ω□-1.

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ENHANCEMENT OF REDUCED GRAPHENE OXIDE BOLOMETRIC PHOTORESPONSE VIA ADDITION OF GRAPHENE QUANTUM DOTS

Surface Review and Letters ◽

10.1142/s0218625x21400114 ◽

2021 ◽

pp. 2140011

Author(s):

S. LAI ◽

M. CHEN ◽

YU. N. KHANIN ◽

K. S. NOVOSELOV ◽

D. V. ANDREEVA

Keyword(s):

Thin Films ◽

Quantum Dots ◽

Ascorbic Acid ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Graphene Quantum Dots ◽

Large Area ◽

Vacuum Filtration ◽

Optical Absorbance ◽

Reduced Graphene

Reduced graphene oxide (rGO) has attracted interest in its potential application in large area photodetectors owing to its ease of manufacture and wideband optical absorbance. Here, we report that thin rGO films produced via vacuum filtration of GO followed by reduction by immersion in L-ascorbic acid are capable of sensing light through a bolometric mechanism. The photoresponse of these rGO thin films can be further enhanced by dropcasting graphene quantum dots (GQDs) on the rGO surface. These GQDs were observed to increase the opacity of the rGO film and hence its absorptivity of light, thereby enabling a significant increase in the photoresponse of the device.

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Synthesis and characterization of free-standing activated carbon/reduced graphene oxide film electrodes for flexible supercapacitors

RSC Advances ◽

10.1039/c7ra07459j ◽

2017 ◽

Vol 7 (71) ◽

pp. 45066-45074 ◽

Cited By ~ 11

Author(s):

Lanshu Xu ◽

Yue Li ◽

Mengying Jia ◽

Qiang Zhao ◽

Xiaojuan Jin ◽

...

Keyword(s):

Graphene Oxide ◽

Activated Carbon ◽

Reduced Graphene Oxide ◽

Composite Films ◽

Free Standing ◽

Filtration Process ◽

Vacuum Filtration ◽

Reduced Graphene ◽

Binder Free

Free-standing, binder-free and flexible activated carbon/reduced graphene oxide (AC/rGO) composite films with various ratios were fabricated via a facile vacuum-filtration process.

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Thermoelectric Characteristics of Flexible Reduced Graphene Oxide/Silver Selenide Nanowire Composites Prepared by a Facile Vacuum Filtration Process

Chinese Physics B ◽

10.1088/1674-1056/ac447e ◽

2021 ◽

Author(s):

Zuo Xiao ◽

Yong Du ◽

Qiufeng Meng ◽

Lei Wang

Keyword(s):

Graphene Oxide ◽

Composite Film ◽

Reduced Graphene Oxide ◽

Power Factor ◽

Silver Selenide ◽

Composite Powders ◽

Nylon Membrane ◽

Filtration Method ◽

Vacuum Filtration ◽

Reduced Graphene

Abstract The reduced graphene oxide/silver selenide nanowire (rGO/Ag2Se NW) composite powders were fabricated via a wet chemical approach, and then flexible rGO/Ag2Se NW composite film was prepared by a facile vacuum filtration method combined with cold-pressing treatment. A highest power factor of 228.88 μWm-1K-2 was achieved at 340 K for the cold-pressed rGO/Ag2Se NW composite film with 0.01 wt% rGO. The rGO/Ag2Se NW composite film revealed superior flexibility as the power factor retained 94.62% after bending for 500 times at a bending radius of 4 mm, which might be due to the interwoven network structures of Ag2Se NWs and pliability of rGO as well as nylon membrane. These results demonstrated the GO/Ag2Se NW composite film has a potential for preparation of flexible thermoelectric devices.

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Design and synthesis of a 3D flexible film electrode based on a sodium carboxymethyl cellulose–polypyrrole@reduced graphene oxide composite for supercapacitors

New Journal of Chemistry ◽

10.1039/d1nj00204j ◽

2021 ◽

Vol 45 (15) ◽

pp. 6630-6639

Author(s):

Hanping Xu ◽

Yue Li ◽

Mengying Jia ◽

Linlin Cui ◽

Cheng Chen ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Carboxymethyl Cellulose ◽

Film Electrode ◽

Filtration Method ◽

Vacuum Filtration ◽

Oxide Composite ◽

Design And Synthesis ◽

Flexible Film ◽

Reduced Graphene

A novel, environmentally friendly and freestanding 3D flexible film electrode (CMC–PPy@RGO) was prepared by a simple vacuum filtration method.

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Synthesis and characterization of reduced graphene oxide by cobalt oxide composite electrode

10.1063/5.0017510 ◽

2020 ◽

Author(s):

S. Veeresh ◽

H. Ganesh ◽

Y. S. Nagaraj ◽

M. Vandana ◽

S. P. Ashokkumar ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Cobalt Oxide ◽

Composite Electrode ◽

Synthesis And Characterization ◽

Oxide Composite ◽

Reduced Graphene

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Structural and Morphological Characterization of Bio-templated Reduced Graphene Oxide and their Antibacterial Efficacy

Journal of Cluster Science ◽

10.1007/s10876-021-02120-6 ◽

2021 ◽

Author(s):

Smina Chappalathottil Sethumadhavan ◽

Lalitha Pottail ◽

S. C. Sharma ◽

Akhila Chithambharan ◽

Suhas Ballal

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Morphological Characterization ◽

Antibacterial Efficacy ◽

Reduced Graphene

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A Methodology Based on FT-IR Data Combined with Random Forest Model to Generate Spectralprints for the Characterization of High-Quality Vinegars

Foods ◽

10.3390/foods10061411 ◽

2021 ◽

Vol 10 (6) ◽

pp. 1411

Author(s):

José Luis P. Calle ◽

Marta Ferreiro-González ◽

Ana Ruiz-Rodríguez ◽

Gerardo F. Barbero ◽

José Á. Álvarez ◽

...

Keyword(s):

Random Forest ◽

Raw Materials ◽

Principal Component ◽

Hierarchical Cluster ◽

Raw Material ◽

Support Vector ◽

Protected Designation Of Origin ◽

Ft Ir

Sherry wine vinegar is a Spanish gourmet product under Protected Designation of Origin (PDO). Before a vinegar can be labeled as Sherry vinegar, the product must meet certain requirements as established by its PDO, which, in this case, means that it has been produced following the traditional solera and criadera ageing system. The quality of the vinegar is determined by many factors such as the raw material, the acetification process or the aging system. For this reason, mainly producers, but also consumers, would benefit from the employment of effective analytical tools that allow precisely determining the origin and quality of vinegar. In the present study, a total of 48 Sherry vinegar samples manufactured from three different starting wines (Palomino Fino, Moscatel, and Pedro Ximénez wine) were analyzed by Fourier-transform infrared (FT-IR) spectroscopy. The spectroscopic data were combined with unsupervised exploratory techniques such as hierarchical cluster analysis (HCA) and principal component analysis (PCA), as well as other nonparametric supervised techniques, namely, support vector machine (SVM) and random forest (RF), for the characterization of the samples. The HCA and PCA results present a clear grouping trend of the vinegar samples according to their raw materials. SVM in combination with leave-one-out cross-validation (LOOCV) successfully classified 100% of the samples, according to the type of wine used for their production. The RF method allowed selecting the most important variables to develop the characteristic fingerprint (“spectralprint”) of the vinegar samples according to their starting wine. Furthermore, the RF model reached 100% accuracy for both LOOCV and out-of-bag (OOB) sets.

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