Enhancement of thermal conductivity in water-based nanofluids employing TiO2/reduced graphene oxide composites

Wang, Shanxing; Li, Yunyong; Zhang, Haiyan; Lin, Yixin; Li, Zhenghui; Wang, Wenguang; Wu, Qigang; Qian, Yannan; Hong, Haoqun; Chen, Zhi

doi:10.1007/s10853-016-0239-3

Cited by 36 publications

(13 citation statements)

References 41 publications

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“…The maximum enhancement of thermal conductivity approaches to 31% at 60 °C for the concentration of 0.1 wt %. This phenomenon of non-linear enhancement is consistent with others’ previous studies [ 10 , 30 ]. It can be seen clearly from the results displayed in Figure 9 c,d that the thermal conductivities of SnO 2 /rGO nanofluids are higher than rGO nanofluids under various mass fractions.…”

Section: Resultssupporting

confidence: 94%

“…Li et al [ 29 ] found better thermal conductivity and stability for SiO 2 -coated graphene nanofluids, compared to graphene fluids. Wang et al [ 30 ] reported the water-based TiO 2 anchored graphene nanofluids have good dispersion stability and the maximum value of thermal conductivity enhancement was up to 33% at a mass fraction of 0.1%.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on Synthesis, Stability, and Thermal Conductivity Properties of Water-Based SnO2/Reduced Graphene Oxide Nanofluids

Zhang

et al. 2017

Materials

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With the rapid development of industry, heat removal and management is a major concern for any technology. Heat transfer plays a critically important role in many sectors of engineering; nowadays utilizing nanofluids is one of the relatively optimized techniques to enhance heat transfer. In the present work, a facile low-temperature solvothermal method was employed to fabricate the SnO2/reduced graphene oxide (rGO) nanocomposite. X-ray diffraction (XRD), thermogravimetric analysis (TGA), X-ray photoelectron spectroscope (XPS), Raman spectroscopy, and transmission electron microscopy (TEM) have been performed to characterize the SnO2/rGO nanocomposite. Numerous ultrasmall SnO2 nanoparticles with average diameters of 3–5 nm were anchored on the surface of rGO, which contain partial hydrophilic functional groups. Water-based SnO2/rGO nanofluids were prepared with various weight concentrations by using an ultrasonic probe without adding any surfactants. The zeta potential was measured to investigate the stability of the as-prepared nanofluid which exhibited great dispersion stability after quiescence for 60 days. A thermal properties analyzer was employed to measure thermal conductivity of water-based SnO2/rGO nanofluids, and the results showed that the enhancement of thermal conductivity could reach up to 31% at 60 °C under the mass fraction of 0.1 wt %, compared to deionized water.

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Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Investigation on Synthesis, Stability, and Thermal Conductivity Properties of Water-Based SnO2/Reduced Graphene Oxide Nanofluids

Zhang

et al. 2017

Materials

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“…[93][94][95][96][97][98][99][100][101][102][103][104] on the thermal conductivity of EG-based nanofluids and Refs. [105][106][107][108][109][110][111][112][113] on the thermal conductivity of water based nanofluids, as well as comprehensive reviews such as Refs. [114][115][116][117][118][119][120][121][122][123].…”

Section: Experimental Based Correlationsmentioning

confidence: 99%

Recent advances in modeling and simulation of nanofluid flows-Part I: Fundamentals and theory

et al. 2019

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It has been more than two decades since the discovery of nanofluids-mixtures of common liquids and solid nanoparticles less than 100 nm in size. As a type of colloidal suspension, nanofluids are typically employed as heat transfer fluids due to their favorable thermal and fluid properties. There have been numerous numerical studies of nanofluids in recent years (more than 1000 in both 2016 and 2017, based on Scopus statistics). Due to the small size and large numbers of nanoparticles that interact with the surrounding fluid in nanofluid flows, it has been a major challenge to capture both the macro-scale and the nano-scale effects of these systems without incurring extraordinarily high computational costs.To help understand the state of the art in modeling nanofluids and to discuss the challenges that remain in this field, the present article reviews the latest developments in modeling of nanofluid flows and heat transfer with an emphasis on 3D simulations. In part I, a brief overview of nanofluids (fabrication, applications, and their achievable thermo-physical properties) will be presented first.Next, various forces that exist in particulate flows such as drag, lift (Magnus and Saffman), Brownian, thermophoretic, van der Waals, and electrostatic double layer forces and their significance in nanofluid flows are discussed. Afterwards, the main models used to calculate the thermophysical properties of nanofluids are reviewed. This will be followed with the description of the main physical models presented for nanofluid flows and heat transfer, from single-phase to Eulerian and Lagrangian two-phase models. In part II, various computational fluid dynamics (CFD) techniques will be presented. Next, the latest studies on 3D simulation of nanofluid flow in various regimes and configurations are reviewed. The present review is expected to be helpful for researchers working on numerical simulation of nanofluids and also for scholars who work on experimental aspects of nanofluids to understand the underlying physical phenomena occurring during their experiments.

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“…Significant enhancements in thermal conductivity upon increase of the additive concentration and nanofluids temperaturewas found with the maximum enhancement of 32.19% at 60 o C for a concentration of 1.0 mg/ml [3].Meanwhile, graphene-based composites attracts more and more attentions for various applications, such as graphene/alumina nanocomposite for monitoring of microbial cell viability [4], 3D flower-like graphene via alumina doping and incorporating Co as oxygen electrode catalyst [5], nitrogen doped graphene anchored cobalt oxides as oxygen reduction and oxygen revolution reaction catalyse [6], Pd/Al 2 O 3 hybrid particles decorated graphene sheets for hydrogen storage [7], alumina-coated Fe 3 O 4 -reduced graphene oxide composite and SiO 2 @SnO 2 /graphene composite as anode materials for lithium ion battery [8,9].The hydrothermal or solvothermal process has been used in a wide range for synthesis graphene-based nanocomposites [5,8,9,10]. Currently, a few papers has been reported about the application of graphene-based composites on nanofluids.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, a few papers has been reported about the application of graphene-based composites on nanofluids. Wang et al prepared water-based nanofluids employing TiO 2 /reduced graphene oxide composites, which synthesized through the solvothermal reaction method, and found the excellent stability and high thermal conductivity of the nanofluids [10]. Li et al Reported the enhancement value of thermal conductivities for SiO 2 decorated graphene dispersed nanofluid [11].Yu et al found better stability and thermal conductivity for SnO 2 /rGO nanocomposite dispersed Nano fluids, compared to rGO water-based nanofluids [12].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of thermal conductivity in water-based nanofluids employing TiO2/reduced graphene oxide composites

Cited by 36 publications

References 41 publications

Investigation on Synthesis, Stability, and Thermal Conductivity Properties of Water-Based SnO2/Reduced Graphene Oxide Nanofluids

Investigation on Synthesis, Stability, and Thermal Conductivity Properties of Water-Based SnO2/Reduced Graphene Oxide Nanofluids

Recent advances in modeling and simulation of nanofluid flows-Part I: Fundamentals and theory

Preparation and Thermal Conductivity of Alumina/Reduced Graphene Oxide Composite Dispersed Aqueous Nanofluids

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