Preparations, Characterizations, and a Comparative Study on Photovoltaic Performance of Two Different Types of Graphene/TiO2 Nanocomposites Photoelectrodes

This research work undertook a comparative study of the promoting effects of graphene in TiO2 photoanodes. The aim of this work was to investigate the effects of the types and concentration of reduced graphene oxides (rGO) on structure properties and the photovoltaic performance of TiO2 based electrodes. Graphene oxide (GO) was prepared by using modified Hammer’s method. Next, GO was reduced by using two different approaches, which were the chemical reduction with vitamin C and thermal reduction. The latter approach was also carried out in situ during the fabrication and heat treatment processes of the dye-sensitized solar cells (DSSCs). From the results, it was found that the photovoltaic performance of the DSSCs containing the GO/TiO2 electrode, in which the GO phase experienced an in situ thermal reduction, was superior to those containing rGO/TiO2. It was also found that the power conversion efficiency of the DSSCs changed with the concentration of graphene in a nonlinear fashion. The optimum concentrations of graphene, corresponding to the highest PCE values of the GO/TiO2 based DSSC (3.69%) and that of the rGO/TiO2 based cell (2.90%), were 0.01 wt% and 0.03 wt%, respectively.

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Chemically reduced graphene oxide-coated knitted fabric imparted conductivity and outstanding hydrophobicity

Textile Research Journal ◽

10.1177/0040517521995471 ◽

2021 ◽

pp. 004051752199547

Author(s):

Min Hou ◽

Xinghua Hong ◽

Yanjun Tang ◽

Zimin Jin ◽

Chengyan Zhu ◽

...

Keyword(s):

Electrical Conductivity ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Chemical Reduction ◽

Knitted Fabric ◽

Mesh Structure ◽

Reduced Graphene ◽

Chemically Reduced Graphene Oxide ◽

Modified Hummers Method

Functionalized knitted fabric, as a kind of flexible, wearable, and waterproof material capable of conductivity, sensitivity and outstanding hydrophobicity, is valuable for multi-field applications. Herein, the reduced graphene oxide (RGO)-coated knitted fabric (polyester/spandex blended) is prepared, which involves the use of graphite oxide (GO) by modified Hummers method and in-situ chemical reduction with hydrazine hydrate. The treated fabric exhibits a high electrical conductivity (202.09 S/cm) and an outstanding hydrophobicity (140°). The outstanding hydrophobicity is associated with the morphology of the fabric and fiber with reference to pseudo-infiltration. These properties can withstand repeated bending and washing without serious deterioration, maintaining good electrical conductivity (35.70 S/cm) and contact angle (119.39°) after eight standard washing cycles. The material, which has RGO architecture and continuous loop mesh structure, can find wide use in smart garment applications.

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A comparative study on the glucose sensors modified by two different β-cyclodextrin functionalized reduced graphene oxide based Au nanocomposites synthesized through developed post immobilization and in situ growth technologies

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2017.07.003 ◽

2017 ◽

Vol 253 ◽

pp. 818-829 ◽

Cited By ~ 10

Author(s):

Min Ma ◽

Taotao Zhe ◽

Wensi Song ◽

Pan Guo ◽

Jing Wang ◽

...

Keyword(s):

Graphene Oxide ◽

Comparative Study ◽

Reduced Graphene Oxide ◽

Glucose Sensors ◽

In Situ Growth ◽

Reduced Graphene

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In-situ hydrothermal synthesis of nickel nanoparticle/reduced graphene oxides as catalyst on CO2 methanation

10.1063/5.0007992 ◽

2020 ◽

Author(s):

Y. K. Krisnandi ◽

I. Abdullah ◽

I. B. G. Prabawanta ◽

M. Handayani

Keyword(s):

Hydrothermal Synthesis ◽

Graphene Oxides ◽

Co2 Methanation ◽

Nickel Nanoparticle ◽

Reduced Graphene ◽

Reduced Graphene Oxides

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A comparative study of Ni–Mn layered double hydroxide/carbon composites with different morphologies for supercapacitors

Physical Chemistry Chemical Physics ◽

10.1039/c6cp05119g ◽

2016 ◽

Vol 18 (43) ◽

pp. 30068-30078 ◽

Cited By ~ 33

Author(s):

M. Li ◽

F. Liu ◽

X. B. Zhang ◽

J. P. Cheng

Keyword(s):

Carbon Nanotubes ◽

Graphene Oxide ◽

Comparative Study ◽

Layered Double Hydroxide ◽

Electrode Materials ◽

Carbon Materials ◽

Carbon Composites ◽

Reduced Graphene ◽

Double Hydroxide

A variety of carbon materials varying from 0D to 2D, i.e. 0D nanoparticles, 1D carbon nanotubes (CNTs) and 2D reduced graphene oxide (rGO) are selected to in situ combine with Ni–Mn layered double hydroxide (LDH) to prepare electrode materials for supercapacitors.

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In-situ electrochemically deposited polypyrrole nanoparticles incorporated reduced graphene oxide as an efficient counter electrode for platinum-free dye-sensitized solar cells

Scientific Reports ◽

10.1038/srep05305 ◽

2014 ◽

Vol 4 (1) ◽

Cited By ~ 85

Author(s):

Su Pei Lim ◽

Alagarsamy Pandikumar ◽

Yee Seng Lim ◽

Nay Ming Huang ◽

Hong Ngee Lim

Keyword(s):

Graphene Oxide ◽

Solar Cells ◽

Counter Electrode ◽

Dye Sensitized Solar Cells ◽

Dye Sensitized ◽

Reduced Graphene ◽

Electrochemically Deposited ◽

Polypyrrole Nanoparticles ◽

Sensitized Solar Cells

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A 3D architecture composite of porous vanadium nitride nanoribbons and reduced graphene oxide as a high-efficiency counter electrode for dye-sensitized solar cells

RSC Advances ◽

10.1039/c7ra11279c ◽

2018 ◽

Vol 8 (2) ◽

pp. 1083-1088 ◽

Cited By ~ 10

Author(s):

Guiqiang Wang ◽

Shuo Hou ◽

Chao Yan ◽

Wei Zhang

Keyword(s):

Composite Electrode ◽

High Efficiency ◽

Photovoltaic Performance ◽

Dye Sensitized Solar Cells ◽

Vanadium Nitride ◽

Pt Electrode ◽

Dye Sensitized ◽

Reduced Graphene ◽

3D Architecture ◽

Sensitized Solar Cells

3D PVNN/RGO composite electrode with hierarchical porosity exhibits superior photovoltaic performance competing with that of the conventional Pt electrode.

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