Aggregation of TiO2-graphene nanocomposites in aqueous environment: Influence of environmental factors and UV irradiation.
作者： Zulin Hua , Jianan Zhang , Xue Bai , Zhengfang Ye , Zhiqiang Tang
DOI: 10.1016/J.SCITOTENV.2015.08.143
关键词: Nanoparticle 、 Graphene 、 Colloid 、 Aqueous solution 、 DLVO theory 、 Hamaker constant 、 Chemical engineering 、 Chemistry 、 Inorganic chemistry 、 Irradiation 、 Nanocomposite
摘要: Abstract The aggregation kinetics of TiO2–graphene nanocomposites in aqueous solution affected by pH, salt types (NaCl, CaCl2) and concentrations electrolytes, stability induced UV irradiation was investigated this study. zeta potentials hydrodynamic diameter the nanoparticles were used as bases to assess behavior, exposed expressed terms supernatant concentration. media followed colloidal theory. significantly aggregated presence a diavalent cation compared with monovalent because former more capable effective charge screening neutralization. calculated Hamaker constant prepared lab 2.31 × 10− 20 J. composite between those pure TiO2 graphene. A known intensity beneficial formation nanoparticle aggregates. However, prolonged may stabilize nanoparticles. These results provided critical information about properties new useful predicting fate transport natural water environments.
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