Table 4: Reported pHpzc of selected PCNPs.

PCNPsParticle size (nm)pHpzcReferences

TiO23.6, 8.11.8, 6.2Guzmán et al. [105]
TiO2354.5Fang et al. [107]
TiO250 ± 55.9Yang and Xing [108]
Hematite12, 32, 657.8, 8.2, 8.8He et al. [109]
Hematite12.5, 29.4, 51.4, 66.57.5, 7.7, 7.9, 8.5Zeng et al. [110]
Al2O3607.9Ghosh et al. [111]
MnO2502.4Feitosa-Felizzola et al. [112]
CeO2157.4>7.0Necula et al. [113]
HgSUnavailable4.0Ravichandran et al. [114]