“Biogenic Synthesis of ZnO-CuO Heterojunction Nanoparticles Using Callistemon Citrinus Plant Extract and Evaluation of Photocatalytic Activity” (2026) NextGen Chemical Discoveries, 2(2), pp. 46–60. Available at: https://novalexpress.com/NGCD/index.php/ngcd/article/view/22 (Accessed: 25 October 2026).