et. al, Wing Kei HO. 2020. “Nanosheetg-C3N4/Perylene Imide Heterojunction Photocatalysts for an Enhanced Photocatalytic Redox Activity”. International Journal of Advanced Science and Technology 29 (2), 1863 -70. http://sersc.org/journals/index.php/IJAST/article/view/3439.