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A sonochemical method has been developed to fabricate hierarchical TiO2/CdS hollow sphere heterostructures with excellent photocatalytic activity.

Polymerized ionic networks (PINs) with six ion pairs per repeating unit are synthesized by nucleophilic-substitution-mediated polymerization or radical polymerization of monomers bearing six 1-vinylimidazolium cations. PIN-based solid-like electrolytes show good ionic conductivities (up to 5.32 × 10(-3) S cm(-1) at 22°C), wide electrochemical stability windows (up to 5.6 V), and good interfacial compatibility with the electrodes.

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N-doped TiO2 with a three-dimensionally ordered macroporous structure was fabricated by a one-step colloidal crystal-template method, which showed excellent photocatalytic activity under visible-light irradiation.