Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, prosp. Akademika Lavrentieva 3, Novosibirsk 630090, Russia

摘要９�/span>The kinetics of thiourea synthesis of CdS nanoparticles (NPs) in reverse microemulsions of Tergitol Np-4/n-decane was studied in the temperature range of 313∑�/span>333 K by spectrophotometry, photon-correlation spectroscopy, and transmission electron microscopy. The formation of NPs is described by the kinetic model, including two consecutive steps: homogeneous nucleation in a solution as the first step and the autocatalytic growth of NPs due to heterogeneous reaction on a continuously increasing surface as the second step. Effective rate constants of the steps (k1 = 1.52×10‒�/span>2‒�/span>1.75×10‒�/span>3 s‒�/span>1 and k2 = 4.9×10‒�/span>1‒�/span>5.1×10‒�/span>2 M‒�/span>1 s‒�/span>1) and effective activation energies (Ea1 = 156 and Ea2 = 149 kJ/mol) were estimated in the pseudo-first-order reaction with respect to cadmium (cCd = 0.9 mM, cThio = 9 mM). The obtained constants were used to calculate the dependence of nanoparticle diameter on the synthesis time (d3�t). The calculated values correlate well with experimental data of photon-correlation spectroscopy and transmission electron microscopy.