Piezo-photocatalytic degradation of organic pollutant by a novel BaTiO3–NiO composite Adiba Adiba, Waris, Sandeep Munjal, Mohammad Zain Khan and Tufail Ahmad Eur. Phys. J. Plus, 138 5 (2023) 408 Published online: 13 May 2023 DOI: 10.1140/epjp/s13360-023-04029-7