Cheah, Kingsly Tian Chee, and Jing Yao Sum. “Synthesis and Evaluation of Fe-Doped Zinc Oxide Photocatalyst for Methylene Blue and Congo Red Removal”. Progress in Energy and Environment 22 (November 29, 2022): 13–28. Accessed May 2, 2025. https://www.akademiabaru.com/submit/index.php/progee/article/view/4587.