Photocatalytic Oxidation of Trichloroethylene in Water Using a Porous Ball of Nano-ZnO and Nanoclay Composite

Table 2

Physical and chemical properties of laponite.

(a)

Physical property
Powder color	White
Density (kg⋅m^−3)	1000
Surface area (m^2⋅g^−1)	370
pH (2 wt% suspension)	9.8

(b)

Chemical composition (dry basis) (%)
SiO2	59.9
MgO	27.5
Li2O	0.8
Na2O	2.8
LOI	8.2

LOI = limiting oxygen index.