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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.


TEM images of CuO nanofluids prepared with different copper salts. (a) CuCl2·2H2O; (b) Cu(NO3)2·3H2O.
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Figure 3: TEM images of CuO nanofluids prepared with different copper salts. (a) CuCl2·2H2O; (b) Cu(NO3)2·3H2O.

Mentions: By replacing Cu(CH3COO)2·H2O with CuCl2·2H2O and Cu(NO3)3·3H2O, respectively, different CuO nanofluids were prepared with all other experimental parameters unchanged. Figure 3 is the TEM images of above two nanofluids. When using CuCl2·2H2O as copper source (Figure 3a), the obtained particles in nanofluids are flake-like particles with width of 10-80 nm and length of 100-300 nm. When using Cu(NO3)2·3H2O (Figure 3b), the particles are aggregations of thin sticks and particles of about 15-50 nm. It has been approved by some researchers that the anions could affect the growth orientation and process of nanoparticles by adsorption or coordination interaction of anions with special crystal face of particles [26]. Therefore, by changing copper source, we could obtain particles with different morphology.


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)

TEM images of CuO nanofluids prepared with different copper salts. (a) CuCl2·2H2O; (b) Cu(NO3)2·3H2O.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 3: TEM images of CuO nanofluids prepared with different copper salts. (a) CuCl2·2H2O; (b) Cu(NO3)2·3H2O.
Mentions: By replacing Cu(CH3COO)2·H2O with CuCl2·2H2O and Cu(NO3)3·3H2O, respectively, different CuO nanofluids were prepared with all other experimental parameters unchanged. Figure 3 is the TEM images of above two nanofluids. When using CuCl2·2H2O as copper source (Figure 3a), the obtained particles in nanofluids are flake-like particles with width of 10-80 nm and length of 100-300 nm. When using Cu(NO3)2·3H2O (Figure 3b), the particles are aggregations of thin sticks and particles of about 15-50 nm. It has been approved by some researchers that the anions could affect the growth orientation and process of nanoparticles by adsorption or coordination interaction of anions with special crystal face of particles [26]. Therefore, by changing copper source, we could obtain particles with different morphology.

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.