Structure and catalytic properties of Pt-modified hyper-cross-linked polystyrene exhibiting hierarchical porosity

Article Abstract:

The study investigates the formation of Pt nanoparticles within a micro/macroporous hyper-cross-linked polystyrene (HPS) matrix in regard to the direct catalytic oxidation of L-sorbose to 2-keto-L-gulonic acids. It examines the structural characteristics of the nanoparticles at different stages of the reaction using a combination of X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), X-ray diffraction (XRD), and anomalous small-angle X-ray scattering (ASAXS).

Science & research, Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Platinum, Research, Porosity, Structure

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Thermotropic properties of organic nanocrystals embedded in ultrasmall crystallization chambers

Article Abstract:

A study investigates organic nanocrystals embedded in controlled pore glass (CPG) and porous polystyrene (p-PS), to see how the melting properties of the embedded nanocrystals are influenced by both the channel diameter and interfacial interactions with the channel walls. It is demonstrated that melting points decrease with decreasing channel diameter, consistent with the increasing surface-area-to-volume ratio of the crystals.

Electric properties

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Crystallization and photovoltaic properties of titania-coated polystyrene hybrid microspheres and their photocatalytic activity

Article Abstract:

The hybrid microspheres with polystyrene core coated by titania nanoparticles were prepared by miniemulsion polymerization, and the as-prepared samples are characterized by SEM, XRD, TG-DTA, XPS, and SPS techniques. It was concluded that polymers in hybrid microspheres have an effect on crystallization and surface photovoltaic properties of TiO2.

Petroleum Refineries, Petroleum refining, Polymerization

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