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

Zhu H, Han D, Meng Z, Wu D, Zhang C - Nanoscale Res Lett (2011)

Bottom Line: The results showed that different copper salts resulted in different particle morphology.Nanofluids with different microstructures could be obtained by changing the synthesis parameters.The thermal conductivities of CuO nanofluids increased with the increase of particle loading.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Materials Science & Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China. htzhu1970@163.com.

ABSTRACT
In this article, a wet chemical method was developed to prepare stable CuO nanofluids. The influences of synthesis parameters, such as kinds and amounts of copper salts, reaction time, were studied. The thermal conductivities of CuO nanofluids were also investigated. The results showed that different copper salts resulted in different particle morphology. The concentration of copper acetate and reaction time affected the size and shape of clusters of primary nanoparticles. Nanofluids with different microstructures could be obtained by changing the synthesis parameters. The thermal conductivities of CuO nanofluids increased with the increase of particle loading.

No MeSH data available.


Characterization of the typical sample. (a) XRD pattern; (b) TEM image; (c) size distribution; (d) real photo.
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Figure 2: Characterization of the typical sample. (a) XRD pattern; (b) TEM image; (c) size distribution; (d) real photo.

Mentions: Figure 2a is the XRD pattern of the typical sample. All the peaks on the XRD pattern can be indexed to that of monoclinic CuO according to the literature (JCPDS, FileNo 80-1916). The average crystal size is 10.4 nm calculated using Debye-Scherrer formula. Figure 2b shows a TEM image of the typical sample. The size of primary particles is about 10 nm, which is in good agreement with the result of XRD. The primary particles aggregate to chain-like clusters with width of 10 nm and length of 50-150 nm (5-15 primary particles). Figure 2c is the size distribution of the typical sample. The particle size is about 20-80 nm, and the size distribution is narrow. The larger particle size is due to the short clusters shown in the TEM image. Figure 2d is the real photo of the products. The obtained CuO nanofluids could remain stable for 5 months with no visible precipitation at the bottom.


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

Zhu H, Han D, Meng Z, Wu D, Zhang C - Nanoscale Res Lett (2011)

Characterization of the typical sample. (a) XRD pattern; (b) TEM image; (c) size distribution; (d) real photo.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211235&req=5

Figure 2: Characterization of the typical sample. (a) XRD pattern; (b) TEM image; (c) size distribution; (d) real photo.
Mentions: Figure 2a is the XRD pattern of the typical sample. All the peaks on the XRD pattern can be indexed to that of monoclinic CuO according to the literature (JCPDS, FileNo 80-1916). The average crystal size is 10.4 nm calculated using Debye-Scherrer formula. Figure 2b shows a TEM image of the typical sample. The size of primary particles is about 10 nm, which is in good agreement with the result of XRD. The primary particles aggregate to chain-like clusters with width of 10 nm and length of 50-150 nm (5-15 primary particles). Figure 2c is the size distribution of the typical sample. The particle size is about 20-80 nm, and the size distribution is narrow. The larger particle size is due to the short clusters shown in the TEM image. Figure 2d is the real photo of the products. The obtained CuO nanofluids could remain stable for 5 months with no visible precipitation at the bottom.

Bottom Line: The results showed that different copper salts resulted in different particle morphology.Nanofluids with different microstructures could be obtained by changing the synthesis parameters.The thermal conductivities of CuO nanofluids increased with the increase of particle loading.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Materials Science & Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China. htzhu1970@163.com.

ABSTRACT
In this article, a wet chemical method was developed to prepare stable CuO nanofluids. The influences of synthesis parameters, such as kinds and amounts of copper salts, reaction time, were studied. The thermal conductivities of CuO nanofluids were also investigated. The results showed that different copper salts resulted in different particle morphology. The concentration of copper acetate and reaction time affected the size and shape of clusters of primary nanoparticles. Nanofluids with different microstructures could be obtained by changing the synthesis parameters. The thermal conductivities of CuO nanofluids increased with the increase of particle loading.

No MeSH data available.