Table 2 Influence of solid content on IEC and specific heat enhancement for KNO3 doped with SiO2.

From: On the relationship between the specific heat enhancement of salt-based nanofluids and the ionic exchange capacity of nanoparticles

SiO2 mass load [%]

pH

d p50 [nm]

\({{\boldsymbol{n}}}_{{{\boldsymbol{H}}}_{{\boldsymbol{acid}}}^{{\boldsymbol{+}}}}/{{\boldsymbol{m}}}_{{\boldsymbol{np}}}\)[mmol/g]

IEC [mmol/g]

Δc P [−]

1.92

1.19

45.1

3.32

2.12

1.101

3.73

1.02

112.8

0.66

0.42

1.068

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