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Aggregation Behavior of Titanium Dioxide Nanoparticles in Aqueous Environments |
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| Authors: | Abdulwahab S Almusallam Yaser M Abdulraheem Mahmoud Shahat Pearl Korah |
| Institution: | 1. Department of Chemical Engineering , Kuwait University , Safat , Kuwait;2. College of Engineering and Petroleum , Kuwait University , Safat , Kuwait abdulwahab.almusallam@ku.edu.kw;4. College of Engineering and Petroleum , Kuwait University , Safat , Kuwait;5. Department of Electrical Engineering , Kuwait University , Safat , Kuwait;6. College of Engineering and Petroleum , Kuwait University , Safat , Kuwait |
| Abstract: | We report on the stability of titanium dioxide nanoparticles suspended in various aqueous solutions with and without the presence of a model organic contaminant—salicylic acid. The stability of the suspended nanoparticles was revealed by measuring the isoelectric point by means of zetapotential scans and measuring the growth kinetics of the hydrodynamic particle size by means of dynamic light scattering (DLS) under different pH conditions. Aggregated nanoparticle sizes were also examined using atomic force microscopy. It was found that salicylic acid had a dramatic impact on the aggregation behavior of TiO2 nanoparticles, suggesting that salicylic acid adsorbs to TiO2 nanoparticles surfaces. |
| Keywords: | Aggregation dynamic light scattering TiO2 nanoparticles |