Abstract
This paper aims to reveal the effects of odium hexametaphosphate (SHMP) and polyacrylic acid (PAA) on dispersion of TiO2 (P25) nanopowder in de-ionic water through ultrasonic horn. We characterized TiO2 suspension by transmission electron microscopy (TEM), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), zeta potential, and surface contact angle instruments. As shown in the results, particularly, it were noticed that (1) the SHMP has better dispersion than PAA due to electronegativity effect, resulting in that the average particle size of the dispersed titanium dioxide in de-ionic water was roughly 92 nm, and (2) the zeta potential of TiO2 suspension with SHMP can be achieved by 54 mV at pH value of 7.7, causing stronger electrostatic repulsion in the suspension solution, compared with PAA.
Highlights
The optimized utilization of functional particles is very important for the practical applications ranging from catalysts, polishing media, and cooling fluids to cosmetics and sunscreens, which requires robust and cost-effective dispersion and surface functionalization routes
Producing TiO2 suspensions necessitates the incorporation of TiO2 nanoparticles in the liquid phase, the break-up and dispersion of nanoparticle clusters, and subsequently stabilization
We aim to examine the effects of inorganic and organic stabilizers on dispersion of TiO2 nanopowder in de-ionic water via probe ultrasonication by using transmission electron microscopy (TEM), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), zeta potential, and surface contact angle instruments to determine the difference for TiO2 suspension with sodium hexametaphosphate (SHMP) and polyacrylic acid (PAA) stabilizers, respectively
Summary
The optimized utilization of functional particles is very important for the practical applications ranging from catalysts, polishing media, and cooling fluids to cosmetics and sunscreens, which requires robust and cost-effective dispersion and surface functionalization routes. The TiO2-based hybrid nanomaterials [5] are one of the most common nanocomposites, which are widely applied in medicine, lithium batteries, UV-screening, sensors, and hybrid solar cell materials. For these applications, TiO2 nanoparticles are generally coated on suitable substrates. Producing TiO2 suspensions necessitates the incorporation of TiO2 nanoparticles in the liquid phase, the break-up and dispersion of nanoparticle clusters, and subsequently stabilization. Small particles tend to agglomeration which is generally due to the van der Waals attraction forces between particles which can be counterbalanced by electrostatic and stereo stabilization [6, 7], resulting in low or complete absence of chemical activity
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