Macroporous polypyrrole-TiO2 composites with improved photoactivity and electrochemical sensitivity.

Highlights: [•] Novel hierarchical macroporous PPy–TiO2 composite nanostructures. [•] Synergetic interaction between PPy and TiO2 for effective charge pair separation. [•] Improved photoactivity for degradation of MB under simulated sun light irradiation. [•] High H2O2 detecting sensitivity with appropriate PPy content in composites. [•] Dispersed PPy nanoparticles by etching the composites with HF acid. [Copyright &y& Elsevier]