4. Conclusion
A simple, low-cost and environmentally friendly surfactanthydration
methods was developed in order to prepare clamshell
derived Ca(OH)2 nanoparticles. This method involved minimum
synthesis steps with lower chemical cost, energy and time savings.
The simple chemical stirring with the presence of green surfactant
(EG, DE and CTAB) solutions followed by thermal activation
(400 C) was used to prepare nano-Ca(OH)2. Furthermore, water
treated samples was used as experiment control for the physicochemical
properties study with surfactant-hydration treated samples.
In the present study, surfactants are capable to provide
good dispersion effect on solid particles by reducing the particle
size of clamshell derived CaO into Ca(OH)2 with nano-dimension
of 25–108 nm as compared to water-treated-only sample. Ethylene
glycol (EG) surfactant rendered remarkable effect on the physicochemical
properties in terms of surface area (78 m2 g1
), basicity
(4658.8 lmolg1
) and particle sizes(25–42 nm), which was comparable
to commercial nano-Ca(OH)2.
A