Preparation and characterization of titania-entrapped silica hollow particles: effective dye removal and evidence of selectivity
Literature Information
Kritapas Laohhasurayotin, Duangkamon Viboonratanasri
A titania-entrapped silica hollow nanostructure was prepared using two consecutive coating processes, followed by calcination. The hydrothermal treatment of D-glucose assisted by polyethylene glycol was used to form a carbon layer over the titania surface. The resulting composite was used to fabricate a silica layer on top by hydrolyzing tetraethyl orthosilicate in strong base. The titania nanoparticles were then released but still trapped inside the silica hollow after calcination. Scanning and transmission electron microscopic techniques were employed to determine the morphology of the obtained product; nitrogen gas adsorption and X-ray diffraction methods were also used. Photocatalytic studies on five organic dyes showed that efficient dye-removal due to photocatalysis and adsorption with selectivity based on the charge–charge interaction between the dye and silica surface was possible. Other factors including the structures of the dyes and their molecular interaction also influenced the observed removal efficiency.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.










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