scholarly journals Polymer-dispersant-stabilized Ag nanofluids for heat transfer applications

2020 ◽  
Author(s):  
K. S. Pavithra ◽  
S. C. Gurumurthy ◽  
M. P. Yashoda ◽  
Tarun Mateti ◽  
Koduri Ramam ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Concentration Ratio ◽  
Wet Chemical Method ◽  
Equimolar Ratio ◽  
Conductivity Enhancement ◽  
Absorption Studies ◽  
One Step ◽  
Polymer Dispersant ◽  
Wet Chemical ◽  
Zeta Potential Analysis

Abstract One-step wet chemical method has been employed for the synthesis of silver (Ag) nanofluids followed by the preparation of polyvinyl pyrrolidone (PVP), polyvinyl alcohol (PVA) and PVP–PVA mixed-dispersant-stabilized nanofluids by varying the concentration ratio of dispersants for the viscosity and thermal conductivity analysis. The optical absorption studies indicate the presence of nanoparticles in the prepared fluids (or the formation of the silver nanoparticles). The shape and size of the nanoparticles are confirmed by the field emission scanning electron microscopy, and the particle size distribution and zeta potential analysis were carried out by using dynamic light scattering. It is observed that the thermal conductivity of Ag nanofluids increases with an increase in the dispersant concentration with respect to the temperature. The maximum thermal conductivity enhancement of Ag nanofluids was observed in the presence of an equimolar ratio of PVP–PVA (1:1:1) blends as stabilizers. Graphic abstract

scholarly journals Synthesis and thermal conductivity of functionalized biocarbon-Fe3O4 nanocomposite-based green nanofluid for heat transfer applications

2021 ◽  
Vol 321 ◽  
pp. 01003
Author(s):  
Divya Barai ◽  
Sohan Parbat ◽  
Bharat Bhanvase
Keyword(s):  
Heat Transfer ◽  
Electron Microscopy ◽  
Thermal Conductivity ◽  
Nanocomposite Particles ◽  
X Ray ◽  
Conductivity Enhancement ◽  
Water Based ◽  
One Step ◽  
Ultrasound Assisted ◽  
Scanning Electron

Bio-based graphitic carbon was synthesized in this work by one-step carbonization of bamboo waste at low temperature. This bio-based carbon was then functionalized in order to decorated it with Fe3O4 nanoparticles. The functionalized biocarbon-Fe3O4 (f-biocarbon-Fe3O4) nanocomposite was synthesized using ultrasound-assisted coprecipitation method which was then confirmed by scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffractometry. Water-based nanofluid was prepared using the synthesized f-biocarbon-Fe3O4 nanocomposite particles. Thermal conductivity of this nanofluid was analyzed at different concentrations and temperatures. A thermal conductivity enhancement of almost 80% was recorded at 35°C for nanofluid containing 0.1 vol.% of f-biocarbon-Fe3O4 nanocomposite particles compared to water. Also, empirical model is developed for prediction of thermal conductivity as a function of concentration and temperature of bamboo waste-derived f-biocarbon-Fe3O4 nanocomposite-based green nanofluid.

scholarly journals Ultrafine Au Nanowires Synthesized via One-Step Wet Chemical Method

2015 ◽  
Vol 31 (6) ◽  
pp. 1186-1190
Author(s):  
XU Hai-Ying ◽  
◽  
KAN Cai-Xia ◽  
WANG Chang-Shun ◽  
NI Yuan ◽  
...  
Keyword(s):  
Chemical Method ◽  
Wet Chemical Method ◽  
One Step ◽  
Wet Chemical ◽  
Au Nanowires

scholarly journals Construction of cost-effective bimetallic nanoparticles on titanium carbides as a superb catalyst for promoting hydrolysis of ammonia borane

RSC Advances ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 843-847 ◽  
Author(s):  
Zhangwei Guo ◽  
Tong Liu ◽  
Qingtao Wang ◽  
Guanhui Gao
Keyword(s):  
Chemical Method ◽  
Bimetallic Nanoparticles ◽  
Cost Effective ◽  
Ammonia Borane ◽  
Wet Chemical Method ◽  
One Step ◽  
Wet Chemical ◽  
Titanium Carbides ◽  
Hydrolysis Of

Bimetallic cost-effective CoNi nanoparticles are supported on MXene by a simple one-step wet-chemical method. The Co0.7Ni0.3/MXene shows the best performance toward catalyzing AB decomposition with TOF of 87.6 molH2molcat−1min−1at 50 °C.

Thermal conductivity enhancement of ZnO nanofluid using a one-step physical method

2012 ◽  
Vol 542 ◽  
pp. 24-27 ◽  
Author(s):  
Gyoung-Ja Lee ◽  
Chang Kyu Kim ◽  
Min Ku Lee ◽  
Chang Kyu Rhee ◽  
Seokwon Kim ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Physical Method ◽  
Thermal Conductivity Enhancement ◽  
Conductivity Enhancement ◽  
One Step

Porous carbon quantum dots: one step green synthesis vial-cysteine and applications in metal ion detection

RSC Advances ◽  
2015 ◽  
Vol 5 (3) ◽  
pp. 2039-2046 ◽  
Author(s):  
Deli Xiao ◽  
Renfeng Pan ◽  
Siqiao Li ◽  
Jia He ◽  
Man Qi ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Porous Carbon ◽  
Metal Ion ◽  
Chemical Method ◽  
Carbon Quantum Dots ◽  
Effective Strategy ◽  
Wet Chemical Method ◽  
One Step ◽  
Wet Chemical ◽  
Metal Ion Detection

A bottom-up and wet-chemical method employing l-cysteine as a precursor has been proven to be an effective strategy for producing fluorescent porous CQDs.

One-step synthesis of maghemite (γ-Fe2O3) nano-particles by wet chemical method

2010 ◽  
Vol 502 (1) ◽  
pp. 257-260 ◽  
Author(s):  
Esmaeel Darezereshki ◽  
Mohammad Ranjbar ◽  
Fereshteh Bakhtiari
Keyword(s):  
Chemical Method ◽  
Nano Particles ◽  
Wet Chemical Method ◽  
One Step ◽  
Wet Chemical

scholarly journals Preparation and thermal conductivity of CuO nanofluid via a wet chemical method

2011 ◽  
Vol 6 (1) ◽  
Author(s):  
Haitao Zhu ◽  
Dongxiao Han ◽  
Zhaoguo Meng ◽  
Daxiong Wu ◽  
Canying Zhang
Keyword(s):  
Thermal Conductivity ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Wet Chemical

Determination of catechol based on gold/Ni(OH)2 nanocomposites supported on reduced graphene oxide via a one-step wet-chemical method

2017 ◽  
Vol 9 (2) ◽  
pp. 338-344 ◽  
Author(s):  
Huijuan Wang ◽  
Jianhang Qu ◽  
Yong Wang ◽  
Shufang Li ◽  
Jianying Qu
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Chemical Method ◽  
Wet Chemical Method ◽  
Reduced Graphene ◽  
One Step ◽  
Wet Chemical ◽  
Xrd Techniques

Here, gold/Ni(OH)2 nanocomposites supported on reduced graphene oxide (Au/Ni(OH)2/rGO) were synthesized by a one-step wet-chemical method, which were characterized by TEM, IR, SEM, XPS and XRD techniques.

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