Bandgap-altered photo-sensing and toxic dye degradation in Al-modified CuO Prashant Kumar Mishra, Rachit Dobhal, Bungkiu Kissinquinker and Somaditya Sen Eur. Phys. J. Spec. Top., 231 15 (2022) 2951-2961 Published online: 27 May 2022 DOI: 10.1140/epjs/s11734-022-00611-9