Ultrasonic Studies on Zinc Oxide Nanofluids

Kiruba, R.; Gopalakrishnan, M.; Mahalingam, T.; Jeevaraj, A. Kingson Solomon

doi:10.1166/jon.2012.1009

Cited by 21 publications

(5 citation statements)

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“…Ultrasonic velocity, density are measured in binary mixtures of diethyl amine+ isopropanol with CuO nano particle at six different concentrations and three different temperatures. As the analysis of the results suggests the presence of strong inter molecular interactions resulting from particle-fluid interactions in binary mixtures [15]. From the acoustical parameters, it is concluded that the weak and strong interaction exist between the mixing components which may due to the dominance of dispersion of CuO nano powder and may not due to the increase of temperatures.…”

Section: Discussionmentioning

confidence: 88%

Acoustical Studies on CuO – Diethyl Amine + Isopropanol Binary Nanofluids at Various Temperatures

Rohini

Kingson

2015

AMR

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Ultrasonic parameters of CuO: Diethylamine-Isopropaonol binary nanofluids at six different concentrations have been reported at three different temperatures like 298K, 308K and 318K. The acoustical parameters such as Ultrasonic sound velocity (v), Compressibility (β), Inter molecular free length (Lf), Acoustic impedance (Z) are calculated from experimental data. The variation of these parameters with composition of the mixture helps us in understanding the nature and extent of interaction between particles and the binary liquid mixtures.KeywordsUltrasonic velocity, Compressibility, Acoustic impedance, Inter molecular free length, Nanofluids

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Section: Discussionmentioning

confidence: 88%

Acoustical Studies on CuO – Diethyl Amine + Isopropanol Binary Nanofluids at Various Temperatures

Rohini

Kingson

2015

AMR

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“…The HAZn5 and HAZn10 samples showed a sharp peak characteristic of the hexagonal structure of zinc oxide reported in standard JCPDS card no. 89‐1397) .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of zinc-loaded hollow glass microspheres (HGMs) for hydrogen storage

Dalai

Vijayalakshmi

Shrivastava

et al. 2015

Int. J. Energy Res.

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The greatest challenge for a feasible hydrogen economy lies on the production of pure hydrogen and the materials for its storage with controlled release at ambient conditions. Hydrogen with its great abundance, high energy density and clean exhaust is a promising candidate to meet the current global challenges of fossil fuel depletion and green house gases emissions. Extensive research on hollow glass microspheres (HGMs) for hydrogen storage is being carried out world-wide, but the right material for hydrogen storage is yet underway. But many other characteristics, such as the poor thermal conductivity etc. of the HGMs, restrict the hydrogen storage capacity. In this work, we have attempted to increase the thermal conductivity of HGMs by ZnO doping. The HGMs with Zn weight percentage from 0 to 10 were prepared by flame spheroidization of amber-colored glass powder impregnated with the required amount of zinc acetate. The prepared HGMs samples were characterized using field emission-scanning electron microscope (FE-SEM), environmental SEM (ESEM), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy and X-ray diffraction (XRD) techniques. The deposition of ZnO on the microsphere walls was observed using FE-SEM, ESEM and HRTEM which was further confirmed using the XRD and ultraviolet-visible absorption data. The hydrogen storage studies done on these samples at 200°C and 10-bar pressure for 5 h showed that the hydrogen storage increased when the Zn percentage in the sample increased from 0 to 2%. The percentage of zinc beyond 2, in the microspheres, showed a decline in the hydrogen storage capacity. The closure of the nanopores due to the ZnO nanocrystal deposition on the microsphere surface reduced the hydrogen storage capacity. The hydrogen storage capacity of HAZn2 was found 3.26 wt% for 10-bar pressure at 200°C.

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“…The values of partial molar volume are given in Table 1. Partial molar volume data, V 0 , are often found useful in interpreting solute-solvent interactions that are considered as particle-fluid interactions in the field of nanofluid research area [23]. These particle-fluid interactions in nanofluids have been determined by taking different thermodynamic parameters.…”

Section: Resultsmentioning

confidence: 99%

Characterizaton and Volumetric Studies of Magnetite (Fe<sub>3</sub>O<sub>4</sub>) Nanofluids at Different Temperatures

Jamal¹,

Yousaf

Khosa³

et al. 2015

JNanoR

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Magnetite nanofluid has been prepared in citric acid based medium. Their stability and polydispersity level have been characterized by UV-visible spectrophotometry.The volumetric properties such as apparent molar volume, partial molar volume and isentropic compressibility of nanofluid have been measured at temperature range from 298.15K to 313.15K at atmospheric pressure. The obtained results were interpreted in terms of particle-particle and particle-fluid interactions, and compared with commercially available magnetite nanofluid in terms of particle size difference. It was observed that the influence of particle size on measured volumetric parameters is significant for any practical applications of fluid flow. The differences in measured quantities were determined qualitatively by considering the state of aggregation / particle size distribution of the nanofluids.

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Ultrasonic Studies on Zinc Oxide Nanofluids

Cited by 21 publications

References 0 publications

Acoustical Studies on CuO – Diethyl Amine + Isopropanol Binary Nanofluids at Various Temperatures

Acoustical Studies on CuO – Diethyl Amine + Isopropanol Binary Nanofluids at Various Temperatures

Fabrication of zinc-loaded hollow glass microspheres (HGMs) for hydrogen storage

Characterizaton and Volumetric Studies of Magnetite (Fe<sub>3</sub>O<sub>4</sub>) Nanofluids at Different Temperatures

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