scholarly journals In-situ Synthesis rGO/NiO Nanorod Nanocomposites Via One-Step Hydrothermal Method and Investigating Physical Properties of Nanocomposites

2021 ◽  
Vol 31.2 (149) ◽  
pp. 119-125
Keyword(s):  
Crystal Structure ◽  
Graphene Oxide ◽  
Methyl Orange ◽  
Congo Red ◽  
Hydrothermal Process ◽  
Diffraction Method ◽  
Absorption Efficiency ◽  
Oxide Semiconductor ◽  
One Step

In-situ nanocomposites of reduced graphene oxide (rGO) and niken oxide (NiO) nanowire were prepared by direct introducing homemade graphene oxide (GO) into precursor solution of NiO with different weight contents of GO (0.0, 0.5, and 1.0 wt.%) before carrying out the one-step hydrothermal process. Homemade GO was synthesized from graphene nanoflakes via Hummer method. Crystal structure and crystallinity of nanocomposites were analyzed using X-ray diffraction method. Scanning electron microscopy was used to study the morphology of nanocomposites. The absorbability of nanocomposites was evaluated through the absorption experiment with two organic dyes: methyl orange and congo red. The results show that compositing with GO does not affect the crystal structure of NiO but it causes the break of NiO nanorod into shorter nanorods, the increase of microstrain in NiO nanorods, and the increase of the absorption efficiency of nanocomposite with both methyl orange and congo red. The results are contribution to the study on hybrid/nanocomposite materials of carbon-based materials and metal oxide semiconductor nanostructures.

scholarly journals Simple synthesis of ZnO nanoparticles on N-doped reduced graphene oxide for the electrocatalytic sensing of l-cysteine

RSC Advances ◽  
2017 ◽  
Vol 7 (56) ◽  
pp. 35004-35011 ◽  
Author(s):  
Suling Yang ◽  
Gang Li ◽  
Chen Qu ◽  
Guifang Wang ◽  
Dan Wang
Keyword(s):  
Graphene Oxide ◽  
Low Temperature ◽  
Reduced Graphene Oxide ◽  
Zno Nanoparticles ◽  
Low Cost ◽  
Hydrothermal Process ◽  
Simple Synthesis ◽  
Zno Nanoparticle ◽  
Reduced Graphene ◽  
One Step

A new kind of ZnO nanoparticle/N-doped reduced graphene oxide nanocomposite (ZnONPs/N-rGO) was synthesized through a low temperature, low-cost and one step hydrothermal process.

scholarly journals Synthesis of Polyaniline coated Graphene Oxide @ SrTiO3 Nanocube Nanocomposites for Enhanced Removal of Carcinogenic Dyes from Aqueous Solution

2016 ◽  
Author(s):  
Syed Shahabuddin ◽  
Norazilawati Muhamad Sarih ◽  
Muhammad Afzal Kamboh ◽  
Hamid Rashidi Nodeh ◽  
Sharifah Mohamad
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Methylene Blue ◽  
Graphene Oxide ◽  
Methyl Orange ◽  
Oxidative Polymerization ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Polymerization Method

The present investigation highlights the synthesis of polyaniline (PANI) coated graphene oxide doped with SrTiO3 nanocube nanocomposites through facile in-situ oxidative polymerization method for the efficient removal of carcinogenic dyes, namely, the cationic dye methylene blue (MB) and the anionic dye methyl orange (MO). The synthesised nanocomposites were characterised by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The adsorption efficiencies of graphene oxide (GO), PANI homopolymer and SrTiO3 nanocubes-doped nanocomposites were assessed by monitoring the adsorption of methylene blue and methyl orange dyes from aqueous solution. The adsorption efficiency of nanocomposites doped with SrTiO3 nanocubes were found to be of higher magnitude as compared with undoped nanocomposite. Moreover, the nanocomposite with 2 wt% SrTiO3 with respect to graphene oxide demonstrated excellent adsorption behaviour with 99% and 91% removal of MB and MO respectively, in a very short duration of time.

Microstructure and Properties of Co@RGO/Cu Composites by One-Step In Situ Reduction Method

2020 ◽  
Vol 993 ◽  
pp. 646-653
Author(s):  
Shao Hui Liu ◽  
Yu Zhao ◽  
Xu Ran
Keyword(s):  
Composite Material ◽  
Graphene Oxide ◽  
Reduction Method ◽  
Pure Copper ◽  
Copper Matrix ◽  
Comprehensive Properties ◽  
Plasma Sintering ◽  
Reduced Graphene ◽  
One Step

In order to improve the interfacial bonding between graphene and copper and improve the dispersibility of graphene in the copper matrix, a novel method was used to prepare graphene. Firstly, graphene oxide (GO) was prepared by the modified Hummer's method, and then the reduced graphene oxide-supported cobalt nanoparticle composite powder (Co@RGO) was prepared by one-step in-situ reduction method. The fabricated materials were mixed with copper powder to obtain various volume fractions. The powder mixture was subjected to compression and discharge plasma sintering (SPS) to prepare a bulk copper-based composite material. The microstructure and its comprehensive properties were studied by SEM, TEM, XRD, FTIR and Raman. The results show that the agglomeration of graphene can be effectively inhibited after the cobalt nanoparticles supported on the graphene surface. The proper amount of Co@RGO could be uniformly dispersed in the copper matrix. The composite material showed a high electrical conductivity (>86% IACS), and the Vickers hardness also increased by about 30% compared with pure copper.

One-Step In Situ Biosynthesis of Graphene Oxide-Bacterial Cellulose Nanocomposite Hydrogels

2014 ◽  
Vol 35 (19) ◽  
pp. 1706-1711 ◽  
Author(s):  
Hongjuan Si ◽  
Honglin Luo ◽  
Guangyao Xiong ◽  
Zhiwei Yang ◽  
Sudha R. Raman ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Bacterial Cellulose ◽  
Nanocomposite Hydrogels ◽  
One Step

Nitrogen‐Doped Reduced Graphene Oxide Hydrogel Achieved via a One‐Step Hydrothermal Process

ChemNanoMat ◽  
2019 ◽  
Vol 5 (9) ◽  
pp. 1144-1151
Author(s):  
Man Song ◽  
Jie Zhao ◽  
Yu Meng ◽  
Lars Riekehr ◽  
Peng‐Xiang Hou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Hydrothermal Process ◽  
Nitrogen Doped ◽  
Reduced Graphene ◽  
One Step

Facile preparation of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)/graphene oxide nanocomposite for electrochromic applications

2019 ◽  
Vol 9 (5) ◽  
pp. 503-508
Author(s):  
Hai-Yun Jiang ◽  
Hui Zeng ◽  
Shi-Hao Zhang ◽  
Ruo-Mei Wu ◽  
Man-Chuan Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Indium Tin Oxide ◽  
Cycling Performance ◽  
Lithium Ions ◽  
Styrene Sulfonate ◽  
Color Changes ◽  
One Step ◽  
Poly Styrene Sulfonate ◽  
Dark Blue

An aqueous electrochromic composite poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)/graphene oxide was prepared in this study by a simple one-step in-situ polymerization. This simple one-step preparation method allowed the composite to achieve good performance without post-treatment. When the composite was coated on the indium tin oxide using as electrochromic film, it exhibited a noticeable electrochromism with reversible color changes from light blue to dark blue, and showed a wider range of discoloration (33%). The composite owns a larger diffusion coefficient of lithium ions (2.95 × 10–15 cm2 s–1) and better cycling performance compared with poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) film.

Flame-retardant and smoke-suppressing wood obtained by the in situ growth of a hydrotalcite-like compound on the inner surfaces of vessels

2019 ◽  
Vol 43 (41) ◽  
pp. 16359-16366 ◽  
Author(s):  
Shuai Lv ◽  
Xianggui Kong ◽  
Liren Wang ◽  
Fazhi Zhang ◽  
Xiaodong Lei
Keyword(s):  
Flame Retardant ◽  
Hydrothermal Process ◽  
Smoke Suppression ◽  
In Situ Growth ◽  
One Step

MgAl-CO32−-LDH was directly grown on the inner surfaces of wood vessels via a one-step hydrothermal process, which greatly enhanced the flame retardant and smoke suppression properties of the wood.

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