The use of environmentally benign nanoreactors in water is crucial for sustainable organic synthesis. Herein, we report that nanomicelles formulated by two surfactants (cationic cetylpyridinium chloride (CPC) and nonionic polyoxyethylene (23) lauryl ether (Brij-35)) in water produce efficient catalysis of diperiodatoargentate(III) directed oxidation of unsaturated alcohol, isoprenol. Interestingly, the maximum speed of reaction was observed when CPC and Brij-35 existed together in a 1 : 1 mole ratio. The kinetic outcome was elucidated with the help of ¹H NMR analysis and favourable micellization of the binary surfactant system. The various mixed micellar microenvironment influences the reaction rate following the confinement of reactants at close proximity to the micellar pseudophase. The reaction, performed through this green envelope of mixed micellar media, reduces the time of reaction effectively.

W/O microemulsion-mediated Sm ₂ S ₃ nanospheres in pickering emulsion-based crystal violet (CV) dye degradation and PANI@Sm ₂ S ₃ nanocomposite synthesis.

Herein, microemulsion mediated controlled lanthanide metal based nanoparticles are employed in the preparation of a pH responsive Pickering emulsion. Lanthanum sulfide (LaS) nanoparticles are synthesised in the core of a water-in-oil microemulsion, prepared by Tween 80/1-butanol/water/toluene. The TEM images obtained, were used to evaluate the stages of the progress of nanosphere preparation. Novel oil-in-water (O/W) Pickering emulsions have been produced with the assistance of negatively charged, size and shape regulated lanthanum sulfide nanoparticles (0.05 wt%) and an adequate amount of a cationic CTAB surfactant. Adsorption of an ionic surfactant onto the surface of oppositely charged nanoparticles typically occurs in slightly acidic or neutral environments (pH 5.33 to 6.16), converting hydrophilic nanoparticles to hydrophobic ones through in situ hydrophobization. Because the emulsions are sensitive to pH alterations, an effective demulsification can be accomplished by pH changes. Demulsification occurs at two distinct pH ranges: a lower pH (3.50) and a higher pH (10.50). Surfactant molecules are desorbed from the surfaces of nanoparticles at these two pH ranges, causing the particles to revert to their hydrophilic form. Desorption of hydrophilic nanoparticles from the water–oil interface caused the Pickering emulsion to become unstable. Remulsification is achieved by just adjusting the pH with the addition KOH or HCl. It is feasible to produce eight consecutive cycles of emulsification and demulsification by just changing the pH. Thus, by using size- and shape-controlled nanoparticles, this study introduces an entirely new scientific perspective on the synthesis of distinct characteristics (likewise to pH responsiveness) of the Pickering emulsion.