Self-assembly, photophysical and electrochemical properties and activation of the TiO2 photocatalyst by perylene bisimide†
Abstract
New symmetrical N,N′-di(octadecyl)perylene-3,4,9,10-tetracarboxylic bisimide (DPBI) was synthesized and characterized by various spectral techniques. DPBI was highly fluorescent and exhibited strong absorption and emission in the visible spectral region. The self-assembly of DPBI was performed in a binary solvent CHCl3–CH3OH (40 : 60), which enables effective molecular aggregation. The molecule self-assembled as molecular wires and the self-assembled structure was analyzed using SEM, optical and fluorescence microscopic techniques. The DPBI loaded TiO2 catalyst was prepared in chloroform under sonication using pure TiO2. Newly prepared DPBI loaded TiO2 was characterized and its photocatalytic activity has been tested for the degradation of Reactive Orange 4 (RO 4) under UV and solar light. The photocatalytic activity of DPBI loaded TiO2 is higher than that of pure TiO2 under UV and solar light for the degradation of RO 4.The DPBI loaded TiO2 is found to be reusable.
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