Photoelectrocatalytic activity of Zn-loaded RGO-TiO2 composite coatings on mild steel substrate via DC electrochemical co-depositionRakibul Hasan, Chin Wei Lai, Sharifah Bee Abd Hamid, Wan Jeffrey Basirun, Zainovia Lockman and Fazlul BariEur. Phys. J. Appl. Phys., 65 2 (2014) 20303DOI: https://doi.org/10.1051/epjap/2013130419