Electrosurface characteristics of titanium dioxide in solutions of simple electrolytes: I. Effect of nature of counterions on adsorption and electrokinetic parameters of TiO2

Photometric study of the kinetics of TiO2 hydrosol coagulation in electrolyte solutions

“…As is obvious from Figs. 7 and 8, at natural pH values, the sols undergo coagulation already at a NaCl and BaCl 2 concentration of 10 -3 M. Under these conditions, particles have either a small positive or small negative surface charge [15], which results in a relatively low ion-electrostatic repulsion bar No. 1 2012 VOLKOVA et al…”

“…The objects for the study were finely dispersed TiO 2 hydrosols stable to sedimentation and aggregation, which were synthesized by the sol-gel method from an alcohol solution of titanium tetrabutoxide [8], at inherent (natural) pH 5.4-5.6 and pH 3.2, which was preset by the dilution of the initial system with 0.1 M HCl. Aqueous solutions of NaCl, KCl, BaCl 2 , and th const 2 .…”

Electric Charging and Colloid Stability of Fabricated Nedle-Like \(\mbox{TiO}_{2}\) Nanoparticles

“…The total number density of adsorption sites is Γ 0 = 5 nm −2 as a literature-based value [18]. The parameters (C s , pK = − log 10 K, pK + = − log 10 K + , pK − = − log 10 K − ) can be tuned by comparing the calculated values with experimental data of surface charge density of TiO 2 reported by van Riemsdijk et al (rutile) [19] and Volkova et al(anatase) [20].…”

“…From these results, we found that needle-like TiO 2 nanoparticles with usual IEP (pH 6) can be obtained by heating at 400˚C. The experimental values of surface charge density were taken from the previously published papers from different groups [19,20]. By fitting the model calculation and experimental data, we found that the use of parameter values C s = 1.2 C/Vm 2 , pK +,− = −1.02, pK =PZC=6 achieves a good agreement between model and experiment.…”

“…Surface charge density of TiO 2 as a function of pH and ionic strength. Symbols are experimenatal data from van Riemsdijk[19] and Volkova[20]. Lines are calculated by 1pK Stern model.…”