Inside- and Outside-Coated PANI and/or PIN-TiO2 Nanotubes for Enhanced Photocatalytic Degradation of 4‑Nitrophenol in Wastewater - Seyed Mohammad Matin Ahmadi; Afsanehsadat Larimi; Ali Akbar Asgharinezhad; Farhad Khorasheh; Cyrus Ghotbi (ACS Omega)