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Physical characteristics of NiO and Ni(OH)2 NPs. Data are expressed as mean ± SD.
| Characteristic | NiO | Ni(OH)2 |
|---|---|---|
| APS * (nm) | 16.1 ± 4.8 | 15.2 ± 4.9 |
| SSA ** (m2/g) | 73.5 | 103.2 |
| Apparent morphology | Aggregated nanograins | Flakey aggregate |
| PZC *** (pH) | 8.7 | 7.9 |
| Zeta potential (mV) | 29.1 ± 0.8 | 35.8 ± 0.7 |
* APS, approximate physical size, ** SSA denotes specific surface area. *** PZC, point of zero charge is defined as the pH value at which the surface is electrostatically neutral.
